Home » Archimedes archive » Archimedes World » archimedes_world_volume_14_issue_12_scp.adf » !AcornAns_AcornAns » !Brolly/s/plot
!Brolly/s/plot
This website contains an archive of files for the Acorn Electron, BBC Micro, Acorn Archimedes, Commodore 16 and Commodore 64 computers, which Dominic Ford has rescued from his private collection of floppy disks and cassettes.
Some of these files were originally commercial releases in the 1980s and 1990s, but they are now widely available online. I assume that copyright over them is no longer being asserted. If you own the copyright and would like files to be removed, please contact me.
| Tape/disk: | Home » Archimedes archive » Archimedes World » archimedes_world_volume_14_issue_12_scp.adf » !AcornAns_AcornAns |
| Filename: | !Brolly/s/plot |
| Read OK: | ✔ |
| File size: | 4931 bytes |
| Load address: | 0000 |
| Exec address: | 0000 |
File contents
^ 0
next # 4
name # 12
width # 4
height # 4
lbit # 4
rbit # 4
image # 4
mask # 4
mode # 4
rbank RN r4
rscrst RN r5
rox RN r6
roy RN r7
rlx RN r8
rly RN r9
area RN a1
spr RN a2
x RN a3
y RN a4
spr_e RN a1
x_e RN a2
y_e RN a3
x_r RN a1
y_r RN a2
w_r RN a3
h_r RN a4
c_r RN r12
h RN a1
IMPORT bank
IMPORT scrst
IMPORT originx
IMPORT originy
IMPORT lx
IMPORT ly
vbls DCD bank, scrst, originx, originy, lx, ly
; plot_brolly
; a leaf APCS function
;
; C prototype:
; void plot_brolly(void *area, void *spr, int x, int y);
;
; nb assumes fits vertically on screen but may lie off either side (in which case osplot used)
; else lies on screen & can do a fast plot with no clipping
; nb2 also assumes sprite is multiple of 8 pixels wide, is 4bpp & screen mode is 640 pixels wide
;
EXPORT plot_brolly
pbnsta DCB "plot_brolly", 0
ALIGN
pbnend DCD &ff000000 + pbnend - pbnsta
plot_brolly
STMFD sp!, {r4-r9, sl, fp, lr}
ADR r4, vbls
LDMIA r4, {r4-r9}
LDR r4, [rbank]
SUB r4, r4, #1
LDR r5, [rscrst, r4, LSL #2] ; screen base addr for VDU output
LDR rox, [rox]
LDR roy, [roy]
LDR rlx, [rlx]
LDR rly, [rly]
ADD r10, x, rox
RSB r11, y, roy
MOVS r10, r10, ASR rlx ; x pixel coord rel left screen } of bottom left
MOV r11, r11, ASR rly ; y pixel coord rel top screen } of object
BMI pb_useosplot
LDR r12, [spr, #width]
ADD r12, r12, #1 ; width in words
ADD r14, r10, r12, ASL #3
CMP r14, #640
BLE pb_usefastplot
pb_useosplot
MOV r5, #0
MOV r4, y
MOV r3, x
MOV r2, spr
MOV r1, area
MOV r0, #512
ADD r0, r0, #34
SWI XOS_SpriteOp
B pb_exit
pb_usefastplot
LDR r14, [spr, #height]
SUB r11, r11, r14
ADD r11, r11, r11, ASL #2
ADD r5, r5, r11, ASL #6
AND r0, r10, #7
BIC r10, r10, #7
ADD r5, r5, r10, ASR #1 ; screen top left of brolly
LDR r4, [spr, #image]
ADD r4, spr, r4 ; brolly sprite top left
ADD r6, r14, #1 ; number of rows to plot
MOV r0, r0, ASL #2
RSB r1, r0, #32
pb_nextrow
MOV r7, r4 ; start of current row in sprite
MOV r10, r5 ; start of current row on screen
MOV r11, r12 ; number of cols to plot
MOV r2, #0
pb_nextcol
LDR r8, [r7], #4
ORR r9, r2, r8, LSL r0
MOV r2, r8, LSR r1
STR r9, [r10], #4
SUBS r11, r11, #1
BLE pb_endcol
LDR r8, [r7], #4
ORR r9, r2, r8, LSL r0
MOV r2, r8, LSR r1
STR r9, [r10], #4
SUBS r11, r11, #1
BLE pb_endcol
LDR r8, [r7], #4
ORR r9, r2, r8, LSL r0
MOV r2, r8, LSR r1
STR r9, [r10], #4
SUBS r11, r11, #1
BLE pb_endcol
LDR r8, [r7], #4
ORR r9, r2, r8, LSL r0
MOV r2, r8, LSR r1
STR r9, [r10], #4
SUBS r11, r11, #1
BGT pb_nextcol
pb_endcol
CMP r0, #0
STRNE r2, [r10], #4
ADD r4, r4, r12, LSL #2
ADD r5, r5, #320
SUBS r6, r6, #1
BGT pb_nextrow
pb_exit LDMFD sp!, {r4-r9, sl, fp, pc}^
; plot_hand
; a leaf APCS function
;
; C prototype:
; void plot_hand(void *area, void *spr, int x, int y);
;
; nb assumes fits on screen & can do a fast plot with no clipping
; nb2 also assumes sprite is multiple of 8 pixels wide, is 4bpp & screen mode is 640 pixels wide
; ignore sprite mask if it has one, but treat colour 0 pixels as transparent;
; also, treat screen pixels of colours 8 to 15 as lying infront of hand sprite
;
EXPORT plot_hand
phnsta DCB "plot_hand", 0
ALIGN
phnend DCD &ff000000 + phnend - phnsta
phsp DCD 0
plot_hand
STMFD sp!, {r4-r9, sl, fp, lr}
STR sp, phsp
ADR r4, vbls
LDMIA r4, {r4-r9}
LDR r4, [rbank]
SUB r4, r4, #1
LDR r5, [rscrst, r4, LSL #2] ; screen base addr for VDU output
LDR rox, [rox]
LDR roy, [roy]
LDR rlx, [rlx]
LDR rly, [rly]
ADD r10, x, rox
RSB r11, y, roy
MOV r10, r10, ASR rlx ; x pixel coord rel left screen } of bottom left
MOV r11, r11, ASR rly ; y pixel coord rel top screen } of object
CMP r10, #25 ; constain to be not off left side screen
MOVLT r10, #25
LDR r12, [spr, #width]
ADD r12, r12, #1 ; width in words
ADD r14, r10, r12, ASL #3
CMP r14, #612
MOVGT r14, r12, ASL #3 ; constrain to be not off right side screen
RSBGT r10, r14, #612
LDR r14, [spr, #height]
SUB r11, r11, r14
ADD r11, r11, r11, ASL #2
ADD r5, r5, r11, ASL #6
AND r0, r10, #7
BIC r10, r10, #7
ADD r5, r5, r10, ASR #1 ; screen top left of hand
LDR r4, [spr, #image]
ADD r4, spr, r4 ; hand sprite top left
ADD r6, r14, #1 ; number of rows to plot
MOV r0, r0, ASL #2
RSB r1, r0, #32
MOV r14, #&88
ORR r14, r14, r14, LSL #8
ORR r14, r14, r14, LSL #16 ; masking constant &88888888
ph_nextrow
MOV r7, r4 ; start of current row in sprite
MOV r10, r5 ; start of current row on screen
MOV r11, r12 ; number of cols to plot
MOV r2, #0
ph_nextcol
LDR r8, [r7], #4
ORR r9, r2, r8, LSL r0 ; shifted hand sprite data
MOV r2, r8, LSR r1
LDR r8, [r10] ; screen data
ORR r13, r9, r9, LSL #2
ORR r13, r13, r13, LSL #1
AND r13, r13, r14
BIC r13, r13, r8
ORR r13, r13, r13, LSR #1
ORR r13, r13, r13, LSR #2
AND r9, r9, r13
BIC r8, r8, r13
ORR r9, r8, r9
STR r9, [r10], #4
SUBS r11, r11, #1
BLE ph_endcol
LDR r8, [r7], #4
ORR r9, r2, r8, LSL r0
MOV r2, r8, LSR r1
LDR r8, [r10] ; screen data
ORR r13, r9, r9, LSL #2
ORR r13, r13, r13, LSL #1
AND r13, r13, r14
BIC r13, r13, r8
ORR r13, r13, r13, LSR #1
ORR r13, r13, r13, LSR #2
AND r9, r9, r13
BIC r8, r8, r13
ORR r9, r8, r9
STR r9, [r10], #4
SUBS r11, r11, #1
BLE ph_endcol
LDR r8, [r7], #4
ORR r9, r2, r8, LSL r0
MOV r2, r8, LSR r1
LDR r8, [r10] ; screen data
ORR r13, r9, r9, LSL #2
ORR r13, r13, r13, LSL #1
AND r13, r13, r14
BIC r13, r13, r8
ORR r13, r13, r13, LSR #1
ORR r13, r13, r13, LSR #2
AND r9, r9, r13
BIC r8, r8, r13
ORR r9, r8, r9
STR r9, [r10], #4
SUBS r11, r11, #1
BLE ph_endcol
LDR r8, [r7], #4
ORR r9, r2, r8, LSL r0
MOV r2, r8, LSR r1
LDR r8, [r10] ; screen data
ORR r13, r9, r9, LSL #2
ORR r13, r13, r13, LSL #1
AND r13, r13, r14
BIC r13, r13, r8
ORR r13, r13, r13, LSR #1
ORR r13, r13, r13, LSR #2
AND r9, r9, r13
BIC r8, r8, r13
ORR r9, r8, r9
STR r9, [r10], #4
SUBS r11, r11, #1
BGT ph_nextcol
ph_endcol
CMP r0, #0
BEQ ph_donecol
LDR r8, [r10] ; screen data
ORR r13, r2, r2, LSL #2
ORR r13, r13, r13, LSL #1
AND r13, r13, r14
BIC r13, r13, r8
ORR r13, r13, r13, LSR #1
ORR r13, r13, r13, LSR #2
AND r2, r2, r13
BIC r8, r8, r13
ORR r2, r8, r2
STR r2, [r10], #4
ph_donecol
ADD r4, r4, r12, LSL #2
ADD r5, r5, #320
SUBS r6, r6, #1
BGT ph_nextrow
ph_exit LDR sp, phsp
LDMFD sp!, {r4-r9, sl, fp, pc}^
; plot_number
; a leaf APCS function
;
; C prototype:
; void plot_number(void *area, void *spr, int x, int y);
;
; nb assumes fits on screen & can do a fast plot with no clipping
; also that is being printed at a word aligned address (ie x is a multiple of 8)
; assumes sprite is 32 by ht pixels, 4bpp & screen mode is 640 pixels wide
; (ht = 32 if vga else 16)
;
MACRO
$label pn_seg $r1, $r2
ASSERT $r1 <> $r2
$label AND r1, r14, $r2
AND r0, r14, $r2, LSR #4
AND $r2, r14, $r1
AND $r1, r14, $r1, LSR #4
ADD $r2, $r2, r1
ADD $r1, $r1, r0
AND r1, r14, $r2, LSR #4
AND r0, r14, $r1, LSR #4
AND $r2, r14, $r2
AND $r1, r14, $r1
ORR r1, r1, r1, LSL #1
ORR r0, r0, r0, LSL #1
ORR r1, r1, r1, LSL #2
ORR r0, r0, r0, LSL #2
ORR $r2, $r2, r1
ORR $r1, $r1, r0
ORR $r2, $r2, $r1, LSL #4
MEND
EXPORT plot_number
pnnsta DCB "plot_number", 0
ALIGN
pnnend DCD &ff000000 + pnnend - pnnsta
pnsp DCD 0
plot_number
STMFD sp!, {r4-r9, sl, fp, lr}
STR sp, pnsp
ADR r4, vbls
LDMIA r4, {r4-r9}
LDR r4, [rbank]
SUB r4, r4, #1
LDR r5, [rscrst, r4, LSL #2] ; screen base addr for VDU output
LDR rox, [rox]
LDR roy, [roy]
LDR rlx, [rlx]
LDR rly, [rly]
ADD r10, x, rox
RSB r11, y, roy
SUB r11, r11, #64
MOV r10, r10, ASR rlx ; x pixel coord rel left screen } of top left
MOV r11, r11, ASR rly ; y pixel coord rel top screen } of object
ADD r11, r11, #1
ADD r11, r11, r11, ASL #2
ADD r5, r5, r11, ASL #6
BIC r10, r10, #7
ADD r5, r5, r10, ASR #1 ; screen top left of number
LDR r4, [spr, #image]
ADD r4, spr, r4 ; number sprite top left
MOV r3, #64
MOV r3, r3, ASR rly
MOV r14, #&0f
ORR r14, r14, r14, LSL #8
ORR r14, r14, r14, LSL #16
pn_loop LDMIA r4!, {r6,r7,r8,r9}
LDMIA r5, {r10,r11,r12,r13}
pn_seg r6, r10
pn_seg r7, r11
pn_seg r8, r12
pn_seg r9, r13
STMIA r5, {r10,r11,r12,r13}
ADD r5, r5, #320
SUBS r3, r3, #1
BNE pn_loop
pn_exit LDR sp, pnsp
LDMFD sp!, {r4-r9, sl, fp, pc}^
; plot_bar
; a leaf APCS function
;
; C prototype:
; void plot_bar(int x, int y, int w, int h, int c);
;
; plot a blank rectangle of width w, height h, bottom left at x, y in colour c
; assume mode is 640 pixels wide 4bpp & rectangle lies within screen area
; also, that x is a multiple of 2 as is w
;
EXPORT plot_bar
rfnsta DCB "plot_bar", 0
ALIGN
rfnend DCD &ff000000 + rfnend - rfnsta
plot_bar
LDR ip, [sp] ; colour in r12
STMFD sp!, {r4-r9, sl, fp, lr}
CMP w_r, #0
ADDMI x_r, x_r, w_r
ADDMI x_r, x_r, #1
RSBMI w_r, w_r, #0
CMP h_r, #0
ADDMI y_r, y_r, h_r
ADDMI y_r, y_r, #1
RSBMI h_r, h_r, #0
ADRL r4, vbls
LDMIA r4, {r4-r9}
LDR r4, [rbank]
SUB r4, r4, #1
LDR r5, [rscrst, r4, LSL #2] ; screen base addr for VDU output
LDR rox, [rox]
LDR roy, [roy]
LDR rlx, [rlx]
ADD rlx, rlx, #1
LDR rly, [rly]
ADD r10, x_r, rox
RSB r11, y_r, roy
MOV r10, r10, ASR rlx ; x byte coord rel left screen } of bottom left
MOV r11, r11, ASR rly ; y pixel coord rel top screen } of rectangle
MOV w_r, w_r, ASR rlx ; width row in bytes
MOV h_r, h_r, ASR rly
ADD r11, r11, #1
SUB r11, r11, h_r ; y pixel coord top rectangle
ADD r14, r10, w_r ; x byte coord just beyond right side
ADD r11, r11, r11, ASL #2
ADD r5, r5, r11, ASL #6
ADD r5, r5, r10
RSB r6, r10, #4
AND r6, r6, #3 ; # pixels on row left upto word boundary
ADD r10, r10, r6
AND r7, r14, #3 ; # pixels on row right beyond word bdry
SUB r8, r14, r10
MOV r8, r8, ASR #2 ; # whole words on each row
ORR r0, c_r, c_r, LSL #4
ORR r0, r0, r0, LSL #8
ORR r0, r0, r0, LSL #16
rf_nextrow
MOV r10, r5
MOVS r11, r6
BEQ rf_rowwords
STRB r0, [r10], #1
SUBS r11, r11, #1
BEQ rf_rowwords
STRB r0, [r10], #1
SUBS r11, r11, #1
BEQ rf_rowwords
STRB r0, [r10], #1
rf_rowwords
MOVS r11, r8
BEQ rf_rowendwords
rf_rowwordscont
STR r0, [r10], #4
SUBS r11, r11, #1
BEQ rf_rowendwords
STR r0, [r10], #4
SUBS r11, r11, #1
BEQ rf_rowendwords
STR r0, [r10], #4
SUBS r11, r11, #1
BEQ rf_rowendwords
STR r0, [r10], #4
SUBS r11, r11, #1
BNE rf_rowwordscont
rf_rowendwords
MOVS r11, r7
BEQ rf_endrow
STRB r0, [r10], #1
SUBS r11, r11, #1
BEQ rf_endrow
STRB r0, [r10], #1
SUBS r11, r11, #1
BEQ rf_endrow
STRB r0, [r10], #1
rf_endrow
ADD r5, r5, #320
SUBS h_r, h_r, #1
BGT rf_nextrow
rf_exit LDMFD sp!, {r4-r9, sl, fp, pc}^
; erase_brolly
; a leaf APCS function
;
; C prototype:
; void erase_brolly(void *spr, int x, int y);
;
; plot a blank rectangle of sprite dimensions at x,y
; assumptions as for plot_brolly
;
; nb written in response to discovery that a full screen clear was using nearly
; 60% of frame time - use of this function to erase brolly & hand reduces this to 16%
; doubling game speed
;
EXPORT erase_brolly
esnsta DCB "erase_brolly", 0
ALIGN
esnend DCD &ff000000 + esnend - esnsta
erase_brolly
STMFD sp!, {r4-r9, sl, fp, lr}
ADRL r4, vbls
LDMIA r4, {r4-r9}
LDR r4, [rbank]
SUB r4, r4, #1
LDR r5, [rscrst, r4, LSL #2] ; screen base addr for VDU output
LDR rox, [rox]
LDR roy, [roy]
LDR rlx, [rlx]
LDR rly, [rly]
ADD r10, x_e, rox
RSB r11, y_e, roy
MOVS r10, r10, ASR rlx ; x pixel coord rel left screen } of bottom left
MOV r11, r11, ASR rly ; y pixel coord rel top screen } of object
MOVMI r10, #0 ; bodge if partly off screen left
LDR r12, [spr_e, #width]
ADD r12, r12, #1 ; width in words
ADD r14, r10, r12, ASL #3
CMP r14, #640
MOVGT r14, r12, ASL #3
RSBGT r10, r14, #640 ; bodge if partly off screen right
LDR r14, [spr_e, #height]
SUB r11, r11, r14
ADD r11, r11, r11, ASL #2
ADD r5, r5, r11, ASL #6
TST r10, #7
ADDNE r12, r12, #1
BIC r10, r10, #7
ADD r5, r5, r10, ASR #1 ; screen top left of sprite
ADD r6, r14, #1 ; number of rows to plot
AND r14, r12, #3
MOVS r12, r12, ASR #2
MOV r0, #0
BEQ es_narrow
MOV r1, r0
MOV r2, r0
MOV r3, r0
es_nextrow
MOV r10, r5
MOV r11, r12
es_nextcol
STR r2, [r10], #4
STMIA r10!, {r0-r3}
SUBS r11, r11, #1
BLE es_endmultcol
STR r2, [r10], #4
STMIA r10!, {r0-r3}
SUBS r11, r11, #1
BLE es_endmultcol
STR r2, [r10], #4
STMIA r10!, {r0-r3}
SUBS r11, r11, #1
BLE es_endmultcol
STR r2, [r10], #4
STMIA r10!, {r0-r3}
SUBS r11, r11, #1
BGT es_nextcol
es_endmultcol
MOV r11, r14
STR r0, [r10], #4
SUBS r11, r11, #1
BLE es_endcol
STR r0, [r10], #4
SUBS r11, r11, #1
BLE es_endcol
STR r0, [r10], #4
SUBS r11, r11, #1
BLE es_endcol
STR r0, [r10], #4
es_endcol
ADD r5, r5, #320
SUBS r6, r6, #1
BGT es_nextrow
B es_exit
es_narrow
es_nnextrow
MOV r10, r5
MOV r11, r14
STR r0, [r10], #4
SUBS r11, r11, #1
BLE es_nendcol
STR r0, [r10], #4
SUBS r11, r11, #1
BLE es_nendcol
STR r0, [r10], #4
SUBS r11, r11, #1
BLE es_nendcol
STR r0, [r10], #4
es_nendcol
ADD r5, r5, #320
SUBS r6, r6, #1
BGT es_nnextrow
es_exit LDMFD sp!, {r4-r9, sl, fp, pc}^
; erase_hand
; a leaf APCS function
;
; C prototype:
; void erase_hand(void *area, void *spr, int x, int y);
;
; nb assumes fits on screen & no clipping needed
; nb2 also assumes sprite is multiple of 8 pixels wide, is 4bpp & screen mode is 640 pixels wide
; ignore sprite mask if it has one, but treat colour 0 pixels as transparent;
; also, treat screen pixels of colours 8 to 15 as lying infront of hand sprite
;
EXPORT erase_hand
ehnsta DCB "erase_hand", 0
ALIGN
ehnend DCD &ff000000 + ehnend - ehnsta
ehsp DCD 0
erase_hand
STMFD sp!, {r4-r9, sl, fp, lr}
STR sp, ehsp
ADRL r4, vbls
LDMIA r4, {r4-r9}
LDR r4, [rbank]
SUB r4, r4, #1
LDR r5, [rscrst, r4, LSL #2] ; screen base addr for VDU output
LDR rox, [rox]
LDR roy, [roy]
LDR rlx, [rlx]
LDR rly, [rly]
ADD r10, x, rox
RSB r11, y, roy
MOV r10, r10, ASR rlx ; x pixel coord rel left screen } of bottom left
MOV r11, r11, ASR rly ; y pixel coord rel top screen } of object
CMP r10, #25 ; constain to be not off left side screen
MOVLT r10, #25
LDR r12, [spr, #width]
ADD r12, r12, #1 ; width in words
ADD r14, r10, r12, ASL #3
CMP r14, #612
MOVGT r14, r12, ASL #3 ; constrain to be not off right side screen
RSBGT r10, r14, #612
LDR r14, [spr, #height]
SUB r11, r11, r14
ADD r11, r11, r11, ASL #2
ADD r5, r5, r11, ASL #6
AND r0, r10, #7
BIC r10, r10, #7
ADD r5, r5, r10, ASR #1 ; screen top left of hand
ADD r6, r14, #1 ; number of rows to plot
MOV r0, r0, ASL #2
RSB r1, r0, #32
MOV r14, #&88
ORR r14, r14, r14, LSL #8
ORR r14, r14, r14, LSL #16 ; masking constant &88888888
eh_nextrow
MOV r10, r5 ; start of current row on screen
MOV r11, r12 ; number of cols to plot
eh_nextcol
LDR r8, [r10] ; screen data
AND r9, r8, r14
ORR r9, r9, r9, LSR #1
ORR r9, r9, r9, LSR #2
AND r8, r8, r9
STR r8, [r10], #4
SUBS r11, r11, #1
BLE eh_endcol
LDR r8, [r10] ; screen data
AND r9, r8, r14
ORR r9, r9, r9, LSR #1
ORR r9, r9, r9, LSR #2
AND r8, r8, r9
STR r8, [r10], #4
SUBS r11, r11, #1
BLE eh_endcol
LDR r8, [r10] ; screen data
AND r9, r8, r14
ORR r9, r9, r9, LSR #1
ORR r9, r9, r9, LSR #2
AND r8, r8, r9
STR r8, [r10], #4
SUBS r11, r11, #1
BLE eh_endcol
LDR r8, [r10] ; screen data
AND r9, r8, r14
ORR r9, r9, r9, LSR #1
ORR r9, r9, r9, LSR #2
AND r8, r8, r9
STR r8, [r10], #4
SUBS r11, r11, #1
BGT eh_nextcol
eh_endcol
CMP r0, #0
LDRNE r8, [r10] ; screen data
ANDNE r9, r8, r14
ORRNE r9, r9, r9, LSR #1
ORRNE r9, r9, r9, LSR #2
ANDNE r8, r8, r9
STRNE r8, [r10], #4
ADD r5, r5, #320
SUBS r6, r6, #1
BGT eh_nextrow
eh_exit LDR sp, ehsp
LDMFD sp!, {r4-r9, sl, fp, pc}^
; erase_number
; a leaf APCS function
;
; C prototype:
; void erase_number(void *area, void *spr, int x, int y);
;
; actually this fn plots a 32 x ht sprite on screen over the number - sprite
; should be set up before to a copy of the background behind the number
; (ht = 32 if vga else 16)
;
; nb assumes fits on screen & can do a fast plot with no clipping
; also that is being printed at a word aligned address (ie x is a multiple of 8)
; assumes sprite is 32 by ht pixels, 4bpp & screen mode is 640 pixels wide
;
EXPORT erase_number
ennsta DCB "erase_number", 0
ALIGN
ennend DCD &ff000000 + ennend - ennsta
erase_number
STMFD sp!, {r4-r9, sl, fp, lr}
ADRL r4, vbls
LDMIA r4, {r4-r9}
LDR r4, [rbank]
SUB r4, r4, #1
LDR r5, [rscrst, r4, LSL #2] ; screen base addr for VDU output
LDR rox, [rox]
LDR roy, [roy]
LDR rlx, [rlx]
LDR rly, [rly]
ADD r10, x, rox
RSB r11, y, roy
SUB r11, r11, #64
MOV r10, r10, ASR rlx ; x pixel coord rel left screen } of top left
MOV r11, r11, ASR rly ; y pixel coord rel top screen } of object
ADD r11, r11, #1
ADD r11, r11, r11, ASL #2
ADD r5, r5, r11, ASL #6
BIC r10, r10, #7
ADD r5, r5, r10, ASR #1 ; screen top left of number
LDR r4, [spr, #image]
ADD r4, spr, r4 ; sprite top left
MOV r3, #32
MOV r3, r3, ASR rly
en_loop LDMIA r4!, {r6,r7,r8,r9}
STMIA r5, {r6,r7,r8,r9}
ADD r5, r5, #320
LDMIA r4!, {r6,r7,r8,r9}
STMIA r5, {r6,r7,r8,r9}
ADD r5, r5, #320
SUBS r3, r3, #1
BNE en_loop
en_exit LDMFD sp!, {r4-r9, sl, fp, pc}^
; erase_bar
; a leaf APCS function
;
; C prototype:
; void erase_bar(int h, void *spr, int x, int y);
;
; actually this fn plots a 320 x h sprite on screen over the bar region - sprite
; should be set up before to a copy of the background behind the bar
;
; nb assumes fits on screen & can do a fast plot with no clipping
; also that is being printed at a word aligned address (ie x is a multiple of 8)
; assumes sprite is 320 by (h>>rly) pixels, 4bpp & screen mode is 640 pixels wide
;
EXPORT erase_bar
ebnsta DCB "erase_bar", 0
ALIGN
ebnend DCD &ff000000 + ebnend - ebnsta
erase_bar
STMFD sp!, {r4-r9, sl, fp, lr}
ADRL r4, vbls
LDMIA r4, {r4-r9}
LDR r4, [rbank]
SUB r4, r4, #1
LDR r5, [rscrst, r4, LSL #2] ; screen base addr for VDU output
LDR rox, [rox]
LDR roy, [roy]
LDR rlx, [rlx]
LDR rly, [rly]
ADD r10, x, rox
RSB r11, y, roy
SUB r11, r11, h
MOV r10, r10, ASR rlx ; x pixel coord rel left screen } of top left
MOV r11, r11, ASR rly ; y pixel coord rel top screen } of object
ADD r11, r11, #1
ADD r11, r11, r11, ASL #2
ADD r5, r5, r11, ASL #6
BIC r10, r10, #7
ADD r2, r5, r10, ASR #1 ; screen top left of number
LDR r4, [spr, #image]
ADD r1, spr, r4 ; sprite top left
MOV h, h, ASR rly
eb_loop LDMIA r1!, {r3-r12}
STMIA r2!, {r3-r12}
LDMIA r1!, {r3-r12}
STMIA r2!, {r3-r12}
LDMIA r1!, {r3-r12}
STMIA r2!, {r3-r12}
LDMIA r1!, {r3-r12}
STMIA r2!, {r3-r12}
ADD r2, r2, #320-160
SUBS h, h, #1
BNE eb_loop
eb_exit LDMFD sp!, {r4-r9, sl, fp, pc}^
END
00000000 0a 09 5e 09 30 0a 6e 65 78 74 09 23 09 34 0a 6e |..^.0.next.#.4.n|
00000010 61 6d 65 09 23 09 31 32 0a 77 69 64 74 68 09 23 |ame.#.12.width.#|
00000020 09 34 0a 68 65 69 67 68 74 09 23 09 34 0a 6c 62 |.4.height.#.4.lb|
00000030 69 74 09 23 09 34 0a 72 62 69 74 09 23 09 34 0a |it.#.4.rbit.#.4.|
00000040 69 6d 61 67 65 09 23 09 34 0a 6d 61 73 6b 09 23 |image.#.4.mask.#|
00000050 09 34 0a 6d 6f 64 65 09 23 09 34 0a 0a 72 62 61 |.4.mode.#.4..rba|
00000060 6e 6b 09 52 4e 09 72 34 0a 72 73 63 72 73 74 09 |nk.RN.r4.rscrst.|
00000070 52 4e 09 72 35 0a 72 6f 78 09 52 4e 09 72 36 0a |RN.r5.rox.RN.r6.|
00000080 72 6f 79 09 52 4e 09 72 37 0a 72 6c 78 09 52 4e |roy.RN.r7.rlx.RN|
00000090 09 72 38 0a 72 6c 79 09 52 4e 09 72 39 0a 0a 61 |.r8.rly.RN.r9..a|
000000a0 72 65 61 09 52 4e 09 61 31 0a 73 70 72 09 52 4e |rea.RN.a1.spr.RN|
000000b0 09 61 32 0a 78 09 52 4e 09 61 33 0a 79 09 52 4e |.a2.x.RN.a3.y.RN|
000000c0 09 61 34 0a 0a 73 70 72 5f 65 09 52 4e 09 61 31 |.a4..spr_e.RN.a1|
000000d0 0a 78 5f 65 09 52 4e 09 61 32 0a 79 5f 65 09 52 |.x_e.RN.a2.y_e.R|
000000e0 4e 09 61 33 0a 0a 78 5f 72 09 52 4e 09 61 31 0a |N.a3..x_r.RN.a1.|
000000f0 79 5f 72 09 52 4e 09 61 32 0a 77 5f 72 09 52 4e |y_r.RN.a2.w_r.RN|
00000100 09 61 33 0a 68 5f 72 09 52 4e 09 61 34 0a 63 5f |.a3.h_r.RN.a4.c_|
00000110 72 09 52 4e 09 72 31 32 0a 0a 68 09 52 4e 09 61 |r.RN.r12..h.RN.a|
00000120 31 0a 0a 09 49 4d 50 4f 52 54 09 62 61 6e 6b 0a |1...IMPORT.bank.|
00000130 09 49 4d 50 4f 52 54 09 73 63 72 73 74 0a 09 49 |.IMPORT.scrst..I|
00000140 4d 50 4f 52 54 09 6f 72 69 67 69 6e 78 0a 09 49 |MPORT.originx..I|
00000150 4d 50 4f 52 54 09 6f 72 69 67 69 6e 79 0a 09 49 |MPORT.originy..I|
00000160 4d 50 4f 52 54 09 6c 78 0a 09 49 4d 50 4f 52 54 |MPORT.lx..IMPORT|
00000170 09 6c 79 0a 0a 76 62 6c 73 09 44 43 44 09 62 61 |.ly..vbls.DCD.ba|
00000180 6e 6b 2c 20 73 63 72 73 74 2c 20 6f 72 69 67 69 |nk, scrst, origi|
00000190 6e 78 2c 20 6f 72 69 67 69 6e 79 2c 20 6c 78 2c |nx, originy, lx,|
000001a0 20 6c 79 0a 0a 3b 20 70 6c 6f 74 5f 62 72 6f 6c | ly..; plot_brol|
000001b0 6c 79 0a 3b 20 61 20 6c 65 61 66 20 41 50 43 53 |ly.; a leaf APCS|
000001c0 20 66 75 6e 63 74 69 6f 6e 0a 3b 0a 3b 20 43 20 | function.;.; C |
000001d0 70 72 6f 74 6f 74 79 70 65 3a 0a 3b 20 76 6f 69 |prototype:.; voi|
000001e0 64 20 70 6c 6f 74 5f 62 72 6f 6c 6c 79 28 76 6f |d plot_brolly(vo|
000001f0 69 64 20 2a 61 72 65 61 2c 20 76 6f 69 64 20 2a |id *area, void *|
00000200 73 70 72 2c 20 69 6e 74 20 78 2c 20 69 6e 74 20 |spr, int x, int |
00000210 79 29 3b 0a 3b 0a 3b 20 6e 62 20 20 61 73 73 75 |y);.;.; nb assu|
00000220 6d 65 73 20 66 69 74 73 20 76 65 72 74 69 63 61 |mes fits vertica|
00000230 6c 6c 79 20 6f 6e 20 73 63 72 65 65 6e 20 62 75 |lly on screen bu|
00000240 74 20 6d 61 79 20 6c 69 65 20 6f 66 66 20 65 69 |t may lie off ei|
00000250 74 68 65 72 20 73 69 64 65 20 28 69 6e 20 77 68 |ther side (in wh|
00000260 69 63 68 20 63 61 73 65 20 6f 73 70 6c 6f 74 20 |ich case osplot |
00000270 75 73 65 64 29 0a 3b 20 20 20 20 20 65 6c 73 65 |used).; else|
00000280 20 6c 69 65 73 20 6f 6e 20 73 63 72 65 65 6e 20 | lies on screen |
00000290 26 20 63 61 6e 20 64 6f 20 61 20 66 61 73 74 20 |& can do a fast |
000002a0 70 6c 6f 74 20 77 69 74 68 20 6e 6f 20 63 6c 69 |plot with no cli|
000002b0 70 70 69 6e 67 0a 3b 20 6e 62 32 20 61 6c 73 6f |pping.; nb2 also|
000002c0 20 61 73 73 75 6d 65 73 20 73 70 72 69 74 65 20 | assumes sprite |
000002d0 69 73 20 6d 75 6c 74 69 70 6c 65 20 6f 66 20 38 |is multiple of 8|
000002e0 20 70 69 78 65 6c 73 20 77 69 64 65 2c 20 69 73 | pixels wide, is|
000002f0 20 34 62 70 70 20 26 20 73 63 72 65 65 6e 20 6d | 4bpp & screen m|
00000300 6f 64 65 20 69 73 20 36 34 30 20 70 69 78 65 6c |ode is 640 pixel|
00000310 73 20 77 69 64 65 0a 3b 0a 09 45 58 50 4f 52 54 |s wide.;..EXPORT|
00000320 09 70 6c 6f 74 5f 62 72 6f 6c 6c 79 0a 0a 70 62 |.plot_brolly..pb|
00000330 6e 73 74 61 09 44 43 42 09 22 70 6c 6f 74 5f 62 |nsta.DCB."plot_b|
00000340 72 6f 6c 6c 79 22 2c 20 30 0a 09 41 4c 49 47 4e |rolly", 0..ALIGN|
00000350 0a 70 62 6e 65 6e 64 09 44 43 44 09 26 66 66 30 |.pbnend.DCD.&ff0|
00000360 30 30 30 30 30 20 2b 20 70 62 6e 65 6e 64 20 2d |00000 + pbnend -|
00000370 20 70 62 6e 73 74 61 0a 0a 70 6c 6f 74 5f 62 72 | pbnsta..plot_br|
00000380 6f 6c 6c 79 0a 0a 09 53 54 4d 46 44 09 73 70 21 |olly...STMFD.sp!|
00000390 2c 20 7b 72 34 2d 72 39 2c 20 73 6c 2c 20 66 70 |, {r4-r9, sl, fp|
000003a0 2c 20 6c 72 7d 0a 09 41 44 52 09 72 34 2c 20 76 |, lr}..ADR.r4, v|
000003b0 62 6c 73 0a 09 4c 44 4d 49 41 09 72 34 2c 20 7b |bls..LDMIA.r4, {|
000003c0 72 34 2d 72 39 7d 0a 09 4c 44 52 09 72 34 2c 20 |r4-r9}..LDR.r4, |
000003d0 5b 72 62 61 6e 6b 5d 0a 09 53 55 42 09 72 34 2c |[rbank]..SUB.r4,|
000003e0 20 72 34 2c 20 23 31 0a 09 4c 44 52 09 72 35 2c | r4, #1..LDR.r5,|
000003f0 20 5b 72 73 63 72 73 74 2c 20 72 34 2c 20 4c 53 | [rscrst, r4, LS|
00000400 4c 20 23 32 5d 09 3b 20 73 63 72 65 65 6e 20 62 |L #2].; screen b|
00000410 61 73 65 20 61 64 64 72 20 66 6f 72 20 56 44 55 |ase addr for VDU|
00000420 20 6f 75 74 70 75 74 0a 09 4c 44 52 09 72 6f 78 | output..LDR.rox|
00000430 2c 20 5b 72 6f 78 5d 0a 09 4c 44 52 09 72 6f 79 |, [rox]..LDR.roy|
00000440 2c 20 5b 72 6f 79 5d 0a 09 4c 44 52 09 72 6c 78 |, [roy]..LDR.rlx|
00000450 2c 20 5b 72 6c 78 5d 0a 09 4c 44 52 09 72 6c 79 |, [rlx]..LDR.rly|
00000460 2c 20 5b 72 6c 79 5d 0a 09 41 44 44 09 72 31 30 |, [rly]..ADD.r10|
00000470 2c 20 78 2c 20 72 6f 78 0a 09 52 53 42 09 72 31 |, x, rox..RSB.r1|
00000480 31 2c 20 79 2c 20 72 6f 79 0a 09 4d 4f 56 53 09 |1, y, roy..MOVS.|
00000490 72 31 30 2c 20 72 31 30 2c 20 41 53 52 20 72 6c |r10, r10, ASR rl|
000004a0 78 09 09 3b 20 78 20 70 69 78 65 6c 20 63 6f 6f |x..; x pixel coo|
000004b0 72 64 20 72 65 6c 20 6c 65 66 74 20 73 63 72 65 |rd rel left scre|
000004c0 65 6e 20 7d 20 6f 66 20 62 6f 74 74 6f 6d 20 6c |en } of bottom l|
000004d0 65 66 74 0a 09 4d 4f 56 09 72 31 31 2c 20 72 31 |eft..MOV.r11, r1|
000004e0 31 2c 20 41 53 52 20 72 6c 79 09 09 3b 20 79 20 |1, ASR rly..; y |
000004f0 70 69 78 65 6c 20 63 6f 6f 72 64 20 72 65 6c 20 |pixel coord rel |
00000500 74 6f 70 20 73 63 72 65 65 6e 20 20 7d 20 6f 66 |top screen } of|
00000510 20 6f 62 6a 65 63 74 0a 09 42 4d 49 09 70 62 5f | object..BMI.pb_|
00000520 75 73 65 6f 73 70 6c 6f 74 0a 09 4c 44 52 09 72 |useosplot..LDR.r|
00000530 31 32 2c 20 5b 73 70 72 2c 20 23 77 69 64 74 68 |12, [spr, #width|
00000540 5d 0a 09 41 44 44 09 72 31 32 2c 20 72 31 32 2c |]..ADD.r12, r12,|
00000550 20 23 31 09 09 09 3b 20 77 69 64 74 68 20 69 6e | #1...; width in|
00000560 20 77 6f 72 64 73 0a 09 41 44 44 09 72 31 34 2c | words..ADD.r14,|
00000570 20 72 31 30 2c 20 72 31 32 2c 20 41 53 4c 20 23 | r10, r12, ASL #|
00000580 33 0a 09 43 4d 50 09 72 31 34 2c 20 23 36 34 30 |3..CMP.r14, #640|
00000590 0a 09 42 4c 45 09 70 62 5f 75 73 65 66 61 73 74 |..BLE.pb_usefast|
000005a0 70 6c 6f 74 0a 70 62 5f 75 73 65 6f 73 70 6c 6f |plot.pb_useosplo|
000005b0 74 0a 09 4d 4f 56 09 72 35 2c 20 23 30 0a 09 4d |t..MOV.r5, #0..M|
000005c0 4f 56 09 72 34 2c 20 79 0a 09 4d 4f 56 09 72 33 |OV.r4, y..MOV.r3|
000005d0 2c 20 78 0a 09 4d 4f 56 09 72 32 2c 20 73 70 72 |, x..MOV.r2, spr|
000005e0 0a 09 4d 4f 56 09 72 31 2c 20 61 72 65 61 0a 09 |..MOV.r1, area..|
000005f0 4d 4f 56 09 72 30 2c 20 23 35 31 32 0a 09 41 44 |MOV.r0, #512..AD|
00000600 44 09 72 30 2c 20 72 30 2c 20 23 33 34 0a 09 53 |D.r0, r0, #34..S|
00000610 57 49 09 58 4f 53 5f 53 70 72 69 74 65 4f 70 0a |WI.XOS_SpriteOp.|
00000620 09 42 09 70 62 5f 65 78 69 74 0a 70 62 5f 75 73 |.B.pb_exit.pb_us|
00000630 65 66 61 73 74 70 6c 6f 74 0a 09 4c 44 52 09 72 |efastplot..LDR.r|
00000640 31 34 2c 20 5b 73 70 72 2c 20 23 68 65 69 67 68 |14, [spr, #heigh|
00000650 74 5d 0a 09 53 55 42 09 72 31 31 2c 20 72 31 31 |t]..SUB.r11, r11|
00000660 2c 20 72 31 34 0a 09 41 44 44 09 72 31 31 2c 20 |, r14..ADD.r11, |
00000670 72 31 31 2c 20 72 31 31 2c 20 41 53 4c 20 23 32 |r11, r11, ASL #2|
00000680 0a 09 41 44 44 09 72 35 2c 20 72 35 2c 20 72 31 |..ADD.r5, r5, r1|
00000690 31 2c 20 41 53 4c 20 23 36 0a 09 41 4e 44 09 72 |1, ASL #6..AND.r|
000006a0 30 2c 20 72 31 30 2c 20 23 37 0a 09 42 49 43 09 |0, r10, #7..BIC.|
000006b0 72 31 30 2c 20 72 31 30 2c 20 23 37 0a 09 41 44 |r10, r10, #7..AD|
000006c0 44 09 72 35 2c 20 72 35 2c 20 72 31 30 2c 20 41 |D.r5, r5, r10, A|
000006d0 53 52 20 23 31 09 09 3b 20 73 63 72 65 65 6e 20 |SR #1..; screen |
000006e0 74 6f 70 20 6c 65 66 74 20 6f 66 20 62 72 6f 6c |top left of brol|
000006f0 6c 79 0a 09 4c 44 52 09 72 34 2c 20 5b 73 70 72 |ly..LDR.r4, [spr|
00000700 2c 20 23 69 6d 61 67 65 5d 0a 09 41 44 44 09 72 |, #image]..ADD.r|
00000710 34 2c 20 73 70 72 2c 20 72 34 09 09 09 3b 20 62 |4, spr, r4...; b|
00000720 72 6f 6c 6c 79 20 73 70 72 69 74 65 20 74 6f 70 |rolly sprite top|
00000730 20 6c 65 66 74 0a 09 41 44 44 09 72 36 2c 20 72 | left..ADD.r6, r|
00000740 31 34 2c 20 23 31 09 09 09 3b 20 6e 75 6d 62 65 |14, #1...; numbe|
00000750 72 20 6f 66 20 72 6f 77 73 20 74 6f 20 70 6c 6f |r of rows to plo|
00000760 74 0a 09 4d 4f 56 09 72 30 2c 20 72 30 2c 20 41 |t..MOV.r0, r0, A|
00000770 53 4c 20 23 32 0a 09 52 53 42 09 72 31 2c 20 72 |SL #2..RSB.r1, r|
00000780 30 2c 20 23 33 32 0a 70 62 5f 6e 65 78 74 72 6f |0, #32.pb_nextro|
00000790 77 0a 09 4d 4f 56 09 72 37 2c 20 72 34 09 09 09 |w..MOV.r7, r4...|
000007a0 09 3b 20 73 74 61 72 74 20 6f 66 20 63 75 72 72 |.; start of curr|
000007b0 65 6e 74 20 72 6f 77 20 69 6e 20 73 70 72 69 74 |ent row in sprit|
000007c0 65 0a 09 4d 4f 56 09 72 31 30 2c 20 72 35 09 09 |e..MOV.r10, r5..|
000007d0 09 09 3b 20 73 74 61 72 74 20 6f 66 20 63 75 72 |..; start of cur|
000007e0 72 65 6e 74 20 72 6f 77 20 6f 6e 20 73 63 72 65 |rent row on scre|
000007f0 65 6e 0a 09 4d 4f 56 09 72 31 31 2c 20 72 31 32 |en..MOV.r11, r12|
00000800 09 09 09 3b 20 6e 75 6d 62 65 72 20 6f 66 20 63 |...; number of c|
00000810 6f 6c 73 20 74 6f 20 70 6c 6f 74 0a 09 4d 4f 56 |ols to plot..MOV|
00000820 09 72 32 2c 20 23 30 0a 70 62 5f 6e 65 78 74 63 |.r2, #0.pb_nextc|
00000830 6f 6c 0a 09 4c 44 52 09 72 38 2c 20 5b 72 37 5d |ol..LDR.r8, [r7]|
00000840 2c 20 23 34 0a 09 4f 52 52 09 72 39 2c 20 72 32 |, #4..ORR.r9, r2|
00000850 2c 20 72 38 2c 20 4c 53 4c 20 72 30 0a 09 4d 4f |, r8, LSL r0..MO|
00000860 56 09 72 32 2c 20 72 38 2c 20 4c 53 52 20 72 31 |V.r2, r8, LSR r1|
00000870 0a 09 53 54 52 09 72 39 2c 20 5b 72 31 30 5d 2c |..STR.r9, [r10],|
00000880 20 23 34 0a 09 53 55 42 53 09 72 31 31 2c 20 72 | #4..SUBS.r11, r|
00000890 31 31 2c 20 23 31 0a 09 42 4c 45 09 70 62 5f 65 |11, #1..BLE.pb_e|
000008a0 6e 64 63 6f 6c 0a 09 4c 44 52 09 72 38 2c 20 5b |ndcol..LDR.r8, [|
000008b0 72 37 5d 2c 20 23 34 0a 09 4f 52 52 09 72 39 2c |r7], #4..ORR.r9,|
000008c0 20 72 32 2c 20 72 38 2c 20 4c 53 4c 20 72 30 0a | r2, r8, LSL r0.|
000008d0 09 4d 4f 56 09 72 32 2c 20 72 38 2c 20 4c 53 52 |.MOV.r2, r8, LSR|
000008e0 20 72 31 0a 09 53 54 52 09 72 39 2c 20 5b 72 31 | r1..STR.r9, [r1|
000008f0 30 5d 2c 20 23 34 0a 09 53 55 42 53 09 72 31 31 |0], #4..SUBS.r11|
00000900 2c 20 72 31 31 2c 20 23 31 0a 09 42 4c 45 09 70 |, r11, #1..BLE.p|
00000910 62 5f 65 6e 64 63 6f 6c 0a 09 4c 44 52 09 72 38 |b_endcol..LDR.r8|
00000920 2c 20 5b 72 37 5d 2c 20 23 34 0a 09 4f 52 52 09 |, [r7], #4..ORR.|
00000930 72 39 2c 20 72 32 2c 20 72 38 2c 20 4c 53 4c 20 |r9, r2, r8, LSL |
00000940 72 30 0a 09 4d 4f 56 09 72 32 2c 20 72 38 2c 20 |r0..MOV.r2, r8, |
00000950 4c 53 52 20 72 31 0a 09 53 54 52 09 72 39 2c 20 |LSR r1..STR.r9, |
00000960 5b 72 31 30 5d 2c 20 23 34 0a 09 53 55 42 53 09 |[r10], #4..SUBS.|
00000970 72 31 31 2c 20 72 31 31 2c 20 23 31 0a 09 42 4c |r11, r11, #1..BL|
00000980 45 09 70 62 5f 65 6e 64 63 6f 6c 0a 09 4c 44 52 |E.pb_endcol..LDR|
00000990 09 72 38 2c 20 5b 72 37 5d 2c 20 23 34 0a 09 4f |.r8, [r7], #4..O|
000009a0 52 52 09 72 39 2c 20 72 32 2c 20 72 38 2c 20 4c |RR.r9, r2, r8, L|
000009b0 53 4c 20 72 30 0a 09 4d 4f 56 09 72 32 2c 20 72 |SL r0..MOV.r2, r|
000009c0 38 2c 20 4c 53 52 20 72 31 0a 09 53 54 52 09 72 |8, LSR r1..STR.r|
000009d0 39 2c 20 5b 72 31 30 5d 2c 20 23 34 0a 09 53 55 |9, [r10], #4..SU|
000009e0 42 53 09 72 31 31 2c 20 72 31 31 2c 20 23 31 0a |BS.r11, r11, #1.|
000009f0 09 42 47 54 09 70 62 5f 6e 65 78 74 63 6f 6c 0a |.BGT.pb_nextcol.|
00000a00 70 62 5f 65 6e 64 63 6f 6c 0a 09 43 4d 50 09 72 |pb_endcol..CMP.r|
00000a10 30 2c 20 23 30 0a 09 53 54 52 4e 45 09 72 32 2c |0, #0..STRNE.r2,|
00000a20 20 5b 72 31 30 5d 2c 20 23 34 0a 09 41 44 44 09 | [r10], #4..ADD.|
00000a30 72 34 2c 20 72 34 2c 20 72 31 32 2c 20 4c 53 4c |r4, r4, r12, LSL|
00000a40 20 23 32 0a 09 41 44 44 09 72 35 2c 20 72 35 2c | #2..ADD.r5, r5,|
00000a50 20 23 33 32 30 0a 09 53 55 42 53 09 72 36 2c 20 | #320..SUBS.r6, |
00000a60 72 36 2c 20 23 31 0a 09 42 47 54 09 70 62 5f 6e |r6, #1..BGT.pb_n|
00000a70 65 78 74 72 6f 77 0a 0a 70 62 5f 65 78 69 74 09 |extrow..pb_exit.|
00000a80 4c 44 4d 46 44 09 73 70 21 2c 20 7b 72 34 2d 72 |LDMFD.sp!, {r4-r|
00000a90 39 2c 20 73 6c 2c 20 66 70 2c 20 70 63 7d 5e 0a |9, sl, fp, pc}^.|
00000aa0 0a 0a 0a 3b 20 70 6c 6f 74 5f 68 61 6e 64 0a 3b |...; plot_hand.;|
00000ab0 20 61 20 6c 65 61 66 20 41 50 43 53 20 66 75 6e | a leaf APCS fun|
00000ac0 63 74 69 6f 6e 0a 3b 0a 3b 20 43 20 70 72 6f 74 |ction.;.; C prot|
00000ad0 6f 74 79 70 65 3a 0a 3b 20 76 6f 69 64 20 70 6c |otype:.; void pl|
00000ae0 6f 74 5f 68 61 6e 64 28 76 6f 69 64 20 2a 61 72 |ot_hand(void *ar|
00000af0 65 61 2c 20 76 6f 69 64 20 2a 73 70 72 2c 20 69 |ea, void *spr, i|
00000b00 6e 74 20 78 2c 20 69 6e 74 20 79 29 3b 0a 3b 0a |nt x, int y);.;.|
00000b10 3b 20 6e 62 20 20 61 73 73 75 6d 65 73 20 66 69 |; nb assumes fi|
00000b20 74 73 20 6f 6e 20 73 63 72 65 65 6e 20 26 20 63 |ts on screen & c|
00000b30 61 6e 20 64 6f 20 61 20 66 61 73 74 20 70 6c 6f |an do a fast plo|
00000b40 74 20 77 69 74 68 20 6e 6f 20 63 6c 69 70 70 69 |t with no clippi|
00000b50 6e 67 0a 3b 20 6e 62 32 20 61 6c 73 6f 20 61 73 |ng.; nb2 also as|
00000b60 73 75 6d 65 73 20 73 70 72 69 74 65 20 69 73 20 |sumes sprite is |
00000b70 6d 75 6c 74 69 70 6c 65 20 6f 66 20 38 20 70 69 |multiple of 8 pi|
00000b80 78 65 6c 73 20 77 69 64 65 2c 20 69 73 20 34 62 |xels wide, is 4b|
00000b90 70 70 20 26 20 73 63 72 65 65 6e 20 6d 6f 64 65 |pp & screen mode|
00000ba0 20 69 73 20 36 34 30 20 70 69 78 65 6c 73 20 77 | is 640 pixels w|
00000bb0 69 64 65 0a 3b 20 69 67 6e 6f 72 65 20 73 70 72 |ide.; ignore spr|
00000bc0 69 74 65 20 6d 61 73 6b 20 69 66 20 69 74 20 68 |ite mask if it h|
00000bd0 61 73 20 6f 6e 65 2c 20 62 75 74 20 74 72 65 61 |as one, but trea|
00000be0 74 20 63 6f 6c 6f 75 72 20 30 20 70 69 78 65 6c |t colour 0 pixel|
00000bf0 73 20 61 73 20 74 72 61 6e 73 70 61 72 65 6e 74 |s as transparent|
00000c00 3b 0a 3b 20 61 6c 73 6f 2c 20 74 72 65 61 74 20 |;.; also, treat |
00000c10 73 63 72 65 65 6e 20 70 69 78 65 6c 73 20 6f 66 |screen pixels of|
00000c20 20 63 6f 6c 6f 75 72 73 20 38 20 74 6f 20 31 35 | colours 8 to 15|
00000c30 20 61 73 20 6c 79 69 6e 67 20 69 6e 66 72 6f 6e | as lying infron|
00000c40 74 20 6f 66 20 68 61 6e 64 20 73 70 72 69 74 65 |t of hand sprite|
00000c50 0a 3b 0a 09 45 58 50 4f 52 54 09 70 6c 6f 74 5f |.;..EXPORT.plot_|
00000c60 68 61 6e 64 0a 0a 70 68 6e 73 74 61 09 44 43 42 |hand..phnsta.DCB|
00000c70 09 22 70 6c 6f 74 5f 68 61 6e 64 22 2c 20 30 0a |."plot_hand", 0.|
00000c80 09 41 4c 49 47 4e 0a 70 68 6e 65 6e 64 09 44 43 |.ALIGN.phnend.DC|
00000c90 44 09 26 66 66 30 30 30 30 30 30 20 2b 20 70 68 |D.&ff000000 + ph|
00000ca0 6e 65 6e 64 20 2d 20 70 68 6e 73 74 61 0a 0a 70 |nend - phnsta..p|
00000cb0 68 73 70 09 44 43 44 09 30 0a 0a 70 6c 6f 74 5f |hsp.DCD.0..plot_|
00000cc0 68 61 6e 64 0a 0a 09 53 54 4d 46 44 09 73 70 21 |hand...STMFD.sp!|
00000cd0 2c 20 7b 72 34 2d 72 39 2c 20 73 6c 2c 20 66 70 |, {r4-r9, sl, fp|
00000ce0 2c 20 6c 72 7d 0a 09 53 54 52 09 73 70 2c 20 70 |, lr}..STR.sp, p|
00000cf0 68 73 70 0a 09 41 44 52 09 72 34 2c 20 76 62 6c |hsp..ADR.r4, vbl|
00000d00 73 0a 09 4c 44 4d 49 41 09 72 34 2c 20 7b 72 34 |s..LDMIA.r4, {r4|
00000d10 2d 72 39 7d 0a 09 4c 44 52 09 72 34 2c 20 5b 72 |-r9}..LDR.r4, [r|
00000d20 62 61 6e 6b 5d 0a 09 53 55 42 09 72 34 2c 20 72 |bank]..SUB.r4, r|
00000d30 34 2c 20 23 31 0a 09 4c 44 52 09 72 35 2c 20 5b |4, #1..LDR.r5, [|
00000d40 72 73 63 72 73 74 2c 20 72 34 2c 20 4c 53 4c 20 |rscrst, r4, LSL |
00000d50 23 32 5d 09 3b 20 73 63 72 65 65 6e 20 62 61 73 |#2].; screen bas|
00000d60 65 20 61 64 64 72 20 66 6f 72 20 56 44 55 20 6f |e addr for VDU o|
00000d70 75 74 70 75 74 0a 09 4c 44 52 09 72 6f 78 2c 20 |utput..LDR.rox, |
00000d80 5b 72 6f 78 5d 0a 09 4c 44 52 09 72 6f 79 2c 20 |[rox]..LDR.roy, |
00000d90 5b 72 6f 79 5d 0a 09 4c 44 52 09 72 6c 78 2c 20 |[roy]..LDR.rlx, |
00000da0 5b 72 6c 78 5d 0a 09 4c 44 52 09 72 6c 79 2c 20 |[rlx]..LDR.rly, |
00000db0 5b 72 6c 79 5d 0a 09 41 44 44 09 72 31 30 2c 20 |[rly]..ADD.r10, |
00000dc0 78 2c 20 72 6f 78 0a 09 52 53 42 09 72 31 31 2c |x, rox..RSB.r11,|
00000dd0 20 79 2c 20 72 6f 79 0a 09 4d 4f 56 09 72 31 30 | y, roy..MOV.r10|
00000de0 2c 20 72 31 30 2c 20 41 53 52 20 72 6c 78 09 09 |, r10, ASR rlx..|
00000df0 3b 20 78 20 70 69 78 65 6c 20 63 6f 6f 72 64 20 |; x pixel coord |
00000e00 72 65 6c 20 6c 65 66 74 20 73 63 72 65 65 6e 20 |rel left screen |
00000e10 7d 20 6f 66 20 62 6f 74 74 6f 6d 20 6c 65 66 74 |} of bottom left|
00000e20 0a 09 4d 4f 56 09 72 31 31 2c 20 72 31 31 2c 20 |..MOV.r11, r11, |
00000e30 41 53 52 20 72 6c 79 09 09 3b 20 79 20 70 69 78 |ASR rly..; y pix|
00000e40 65 6c 20 63 6f 6f 72 64 20 72 65 6c 20 74 6f 70 |el coord rel top|
00000e50 20 73 63 72 65 65 6e 20 20 7d 20 6f 66 20 6f 62 | screen } of ob|
00000e60 6a 65 63 74 0a 09 43 4d 50 09 72 31 30 2c 20 23 |ject..CMP.r10, #|
00000e70 32 35 09 09 09 3b 20 63 6f 6e 73 74 61 69 6e 20 |25...; constain |
00000e80 74 6f 20 62 65 20 6e 6f 74 20 6f 66 66 20 6c 65 |to be not off le|
00000e90 66 74 20 73 69 64 65 20 73 63 72 65 65 6e 0a 09 |ft side screen..|
00000ea0 4d 4f 56 4c 54 09 72 31 30 2c 20 23 32 35 0a 09 |MOVLT.r10, #25..|
00000eb0 4c 44 52 09 72 31 32 2c 20 5b 73 70 72 2c 20 23 |LDR.r12, [spr, #|
00000ec0 77 69 64 74 68 5d 0a 09 41 44 44 09 72 31 32 2c |width]..ADD.r12,|
00000ed0 20 72 31 32 2c 20 23 31 09 09 09 3b 20 77 69 64 | r12, #1...; wid|
00000ee0 74 68 20 69 6e 20 77 6f 72 64 73 0a 09 41 44 44 |th in words..ADD|
00000ef0 09 72 31 34 2c 20 72 31 30 2c 20 72 31 32 2c 20 |.r14, r10, r12, |
00000f00 41 53 4c 20 23 33 0a 09 43 4d 50 09 72 31 34 2c |ASL #3..CMP.r14,|
00000f10 20 23 36 31 32 0a 09 4d 4f 56 47 54 09 72 31 34 | #612..MOVGT.r14|
00000f20 2c 20 72 31 32 2c 20 41 53 4c 20 23 33 09 09 3b |, r12, ASL #3..;|
00000f30 20 63 6f 6e 73 74 72 61 69 6e 20 74 6f 20 62 65 | constrain to be|
00000f40 20 6e 6f 74 20 6f 66 66 20 72 69 67 68 74 20 73 | not off right s|
00000f50 69 64 65 20 73 63 72 65 65 6e 0a 09 52 53 42 47 |ide screen..RSBG|
00000f60 54 09 72 31 30 2c 20 72 31 34 2c 20 23 36 31 32 |T.r10, r14, #612|
00000f70 0a 09 4c 44 52 09 72 31 34 2c 20 5b 73 70 72 2c |..LDR.r14, [spr,|
00000f80 20 23 68 65 69 67 68 74 5d 0a 09 53 55 42 09 72 | #height]..SUB.r|
00000f90 31 31 2c 20 72 31 31 2c 20 72 31 34 0a 09 41 44 |11, r11, r14..AD|
00000fa0 44 09 72 31 31 2c 20 72 31 31 2c 20 72 31 31 2c |D.r11, r11, r11,|
00000fb0 20 41 53 4c 20 23 32 0a 09 41 44 44 09 72 35 2c | ASL #2..ADD.r5,|
00000fc0 20 72 35 2c 20 72 31 31 2c 20 41 53 4c 20 23 36 | r5, r11, ASL #6|
00000fd0 0a 09 41 4e 44 09 72 30 2c 20 72 31 30 2c 20 23 |..AND.r0, r10, #|
00000fe0 37 0a 09 42 49 43 09 72 31 30 2c 20 72 31 30 2c |7..BIC.r10, r10,|
00000ff0 20 23 37 0a 09 41 44 44 09 72 35 2c 20 72 35 2c | #7..ADD.r5, r5,|
00001000 20 72 31 30 2c 20 41 53 52 20 23 31 09 09 3b 20 | r10, ASR #1..; |
00001010 73 63 72 65 65 6e 20 74 6f 70 20 6c 65 66 74 20 |screen top left |
00001020 6f 66 20 68 61 6e 64 0a 09 4c 44 52 09 72 34 2c |of hand..LDR.r4,|
00001030 20 5b 73 70 72 2c 20 23 69 6d 61 67 65 5d 0a 09 | [spr, #image]..|
00001040 41 44 44 09 72 34 2c 20 73 70 72 2c 20 72 34 09 |ADD.r4, spr, r4.|
00001050 09 09 3b 20 68 61 6e 64 20 73 70 72 69 74 65 20 |..; hand sprite |
00001060 74 6f 70 20 6c 65 66 74 0a 09 41 44 44 09 72 36 |top left..ADD.r6|
00001070 2c 20 72 31 34 2c 20 23 31 09 09 09 3b 20 6e 75 |, r14, #1...; nu|
00001080 6d 62 65 72 20 6f 66 20 72 6f 77 73 20 74 6f 20 |mber of rows to |
00001090 70 6c 6f 74 0a 09 4d 4f 56 09 72 30 2c 20 72 30 |plot..MOV.r0, r0|
000010a0 2c 20 41 53 4c 20 23 32 0a 09 52 53 42 09 72 31 |, ASL #2..RSB.r1|
000010b0 2c 20 72 30 2c 20 23 33 32 0a 09 4d 4f 56 09 72 |, r0, #32..MOV.r|
000010c0 31 34 2c 20 23 26 38 38 0a 09 4f 52 52 09 72 31 |14, #&88..ORR.r1|
000010d0 34 2c 20 72 31 34 2c 20 72 31 34 2c 20 4c 53 4c |4, r14, r14, LSL|
000010e0 20 23 38 0a 09 4f 52 52 09 72 31 34 2c 20 72 31 | #8..ORR.r14, r1|
000010f0 34 2c 20 72 31 34 2c 20 4c 53 4c 20 23 31 36 09 |4, r14, LSL #16.|
00001100 09 3b 20 6d 61 73 6b 69 6e 67 20 63 6f 6e 73 74 |.; masking const|
00001110 61 6e 74 20 26 38 38 38 38 38 38 38 38 0a 70 68 |ant &88888888.ph|
00001120 5f 6e 65 78 74 72 6f 77 0a 09 4d 4f 56 09 72 37 |_nextrow..MOV.r7|
00001130 2c 20 72 34 09 09 09 09 3b 20 73 74 61 72 74 20 |, r4....; start |
00001140 6f 66 20 63 75 72 72 65 6e 74 20 72 6f 77 20 69 |of current row i|
00001150 6e 20 73 70 72 69 74 65 0a 09 4d 4f 56 09 72 31 |n sprite..MOV.r1|
00001160 30 2c 20 72 35 09 09 09 09 3b 20 73 74 61 72 74 |0, r5....; start|
00001170 20 6f 66 20 63 75 72 72 65 6e 74 20 72 6f 77 20 | of current row |
00001180 6f 6e 20 73 63 72 65 65 6e 0a 09 4d 4f 56 09 72 |on screen..MOV.r|
00001190 31 31 2c 20 72 31 32 09 09 09 3b 20 6e 75 6d 62 |11, r12...; numb|
000011a0 65 72 20 6f 66 20 63 6f 6c 73 20 74 6f 20 70 6c |er of cols to pl|
000011b0 6f 74 0a 09 4d 4f 56 09 72 32 2c 20 23 30 0a 70 |ot..MOV.r2, #0.p|
000011c0 68 5f 6e 65 78 74 63 6f 6c 0a 09 4c 44 52 09 72 |h_nextcol..LDR.r|
000011d0 38 2c 20 5b 72 37 5d 2c 20 23 34 0a 09 4f 52 52 |8, [r7], #4..ORR|
000011e0 09 72 39 2c 20 72 32 2c 20 72 38 2c 20 4c 53 4c |.r9, r2, r8, LSL|
000011f0 20 72 30 09 09 3b 20 73 68 69 66 74 65 64 20 68 | r0..; shifted h|
00001200 61 6e 64 20 73 70 72 69 74 65 20 64 61 74 61 0a |and sprite data.|
00001210 09 4d 4f 56 09 72 32 2c 20 72 38 2c 20 4c 53 52 |.MOV.r2, r8, LSR|
00001220 20 72 31 0a 09 4c 44 52 09 72 38 2c 20 5b 72 31 | r1..LDR.r8, [r1|
00001230 30 5d 09 09 09 3b 20 73 63 72 65 65 6e 20 64 61 |0]...; screen da|
00001240 74 61 0a 09 4f 52 52 09 72 31 33 2c 20 72 39 2c |ta..ORR.r13, r9,|
00001250 20 72 39 2c 20 4c 53 4c 20 23 32 0a 09 4f 52 52 | r9, LSL #2..ORR|
00001260 09 72 31 33 2c 20 72 31 33 2c 20 72 31 33 2c 20 |.r13, r13, r13, |
00001270 4c 53 4c 20 23 31 0a 09 41 4e 44 09 72 31 33 2c |LSL #1..AND.r13,|
00001280 20 72 31 33 2c 20 72 31 34 0a 09 42 49 43 09 72 | r13, r14..BIC.r|
00001290 31 33 2c 20 72 31 33 2c 20 72 38 0a 09 4f 52 52 |13, r13, r8..ORR|
000012a0 09 72 31 33 2c 20 72 31 33 2c 20 72 31 33 2c 20 |.r13, r13, r13, |
000012b0 4c 53 52 20 23 31 0a 09 4f 52 52 09 72 31 33 2c |LSR #1..ORR.r13,|
000012c0 20 72 31 33 2c 20 72 31 33 2c 20 4c 53 52 20 23 | r13, r13, LSR #|
000012d0 32 0a 09 41 4e 44 09 72 39 2c 20 72 39 2c 20 72 |2..AND.r9, r9, r|
000012e0 31 33 0a 09 42 49 43 09 72 38 2c 20 72 38 2c 20 |13..BIC.r8, r8, |
000012f0 72 31 33 0a 09 4f 52 52 09 72 39 2c 20 72 38 2c |r13..ORR.r9, r8,|
00001300 20 72 39 0a 09 53 54 52 09 72 39 2c 20 5b 72 31 | r9..STR.r9, [r1|
00001310 30 5d 2c 20 23 34 0a 09 53 55 42 53 09 72 31 31 |0], #4..SUBS.r11|
00001320 2c 20 72 31 31 2c 20 23 31 0a 09 42 4c 45 09 70 |, r11, #1..BLE.p|
00001330 68 5f 65 6e 64 63 6f 6c 0a 09 4c 44 52 09 72 38 |h_endcol..LDR.r8|
00001340 2c 20 5b 72 37 5d 2c 20 23 34 0a 09 4f 52 52 09 |, [r7], #4..ORR.|
00001350 72 39 2c 20 72 32 2c 20 72 38 2c 20 4c 53 4c 20 |r9, r2, r8, LSL |
00001360 72 30 0a 09 4d 4f 56 09 72 32 2c 20 72 38 2c 20 |r0..MOV.r2, r8, |
00001370 4c 53 52 20 72 31 0a 09 4c 44 52 09 72 38 2c 20 |LSR r1..LDR.r8, |
00001380 5b 72 31 30 5d 09 09 09 3b 20 73 63 72 65 65 6e |[r10]...; screen|
00001390 20 64 61 74 61 0a 09 4f 52 52 09 72 31 33 2c 20 | data..ORR.r13, |
000013a0 72 39 2c 20 72 39 2c 20 4c 53 4c 20 23 32 0a 09 |r9, r9, LSL #2..|
000013b0 4f 52 52 09 72 31 33 2c 20 72 31 33 2c 20 72 31 |ORR.r13, r13, r1|
000013c0 33 2c 20 4c 53 4c 20 23 31 0a 09 41 4e 44 09 72 |3, LSL #1..AND.r|
000013d0 31 33 2c 20 72 31 33 2c 20 72 31 34 0a 09 42 49 |13, r13, r14..BI|
000013e0 43 09 72 31 33 2c 20 72 31 33 2c 20 72 38 0a 09 |C.r13, r13, r8..|
000013f0 4f 52 52 09 72 31 33 2c 20 72 31 33 2c 20 72 31 |ORR.r13, r13, r1|
00001400 33 2c 20 4c 53 52 20 23 31 0a 09 4f 52 52 09 72 |3, LSR #1..ORR.r|
00001410 31 33 2c 20 72 31 33 2c 20 72 31 33 2c 20 4c 53 |13, r13, r13, LS|
00001420 52 20 23 32 0a 09 41 4e 44 09 72 39 2c 20 72 39 |R #2..AND.r9, r9|
00001430 2c 20 72 31 33 0a 09 42 49 43 09 72 38 2c 20 72 |, r13..BIC.r8, r|
00001440 38 2c 20 72 31 33 0a 09 4f 52 52 09 72 39 2c 20 |8, r13..ORR.r9, |
00001450 72 38 2c 20 72 39 0a 09 53 54 52 09 72 39 2c 20 |r8, r9..STR.r9, |
00001460 5b 72 31 30 5d 2c 20 23 34 0a 09 53 55 42 53 09 |[r10], #4..SUBS.|
00001470 72 31 31 2c 20 72 31 31 2c 20 23 31 0a 09 42 4c |r11, r11, #1..BL|
00001480 45 09 70 68 5f 65 6e 64 63 6f 6c 0a 09 4c 44 52 |E.ph_endcol..LDR|
00001490 09 72 38 2c 20 5b 72 37 5d 2c 20 23 34 0a 09 4f |.r8, [r7], #4..O|
000014a0 52 52 09 72 39 2c 20 72 32 2c 20 72 38 2c 20 4c |RR.r9, r2, r8, L|
000014b0 53 4c 20 72 30 0a 09 4d 4f 56 09 72 32 2c 20 72 |SL r0..MOV.r2, r|
000014c0 38 2c 20 4c 53 52 20 72 31 0a 09 4c 44 52 09 72 |8, LSR r1..LDR.r|
000014d0 38 2c 20 5b 72 31 30 5d 09 09 09 3b 20 73 63 72 |8, [r10]...; scr|
000014e0 65 65 6e 20 64 61 74 61 0a 09 4f 52 52 09 72 31 |een data..ORR.r1|
000014f0 33 2c 20 72 39 2c 20 72 39 2c 20 4c 53 4c 20 23 |3, r9, r9, LSL #|
00001500 32 0a 09 4f 52 52 09 72 31 33 2c 20 72 31 33 2c |2..ORR.r13, r13,|
00001510 20 72 31 33 2c 20 4c 53 4c 20 23 31 0a 09 41 4e | r13, LSL #1..AN|
00001520 44 09 72 31 33 2c 20 72 31 33 2c 20 72 31 34 0a |D.r13, r13, r14.|
00001530 09 42 49 43 09 72 31 33 2c 20 72 31 33 2c 20 72 |.BIC.r13, r13, r|
00001540 38 0a 09 4f 52 52 09 72 31 33 2c 20 72 31 33 2c |8..ORR.r13, r13,|
00001550 20 72 31 33 2c 20 4c 53 52 20 23 31 0a 09 4f 52 | r13, LSR #1..OR|
00001560 52 09 72 31 33 2c 20 72 31 33 2c 20 72 31 33 2c |R.r13, r13, r13,|
00001570 20 4c 53 52 20 23 32 0a 09 41 4e 44 09 72 39 2c | LSR #2..AND.r9,|
00001580 20 72 39 2c 20 72 31 33 0a 09 42 49 43 09 72 38 | r9, r13..BIC.r8|
00001590 2c 20 72 38 2c 20 72 31 33 0a 09 4f 52 52 09 72 |, r8, r13..ORR.r|
000015a0 39 2c 20 72 38 2c 20 72 39 0a 09 53 54 52 09 72 |9, r8, r9..STR.r|
000015b0 39 2c 20 5b 72 31 30 5d 2c 20 23 34 0a 09 53 55 |9, [r10], #4..SU|
000015c0 42 53 09 72 31 31 2c 20 72 31 31 2c 20 23 31 0a |BS.r11, r11, #1.|
000015d0 09 42 4c 45 09 70 68 5f 65 6e 64 63 6f 6c 0a 09 |.BLE.ph_endcol..|
000015e0 4c 44 52 09 72 38 2c 20 5b 72 37 5d 2c 20 23 34 |LDR.r8, [r7], #4|
000015f0 0a 09 4f 52 52 09 72 39 2c 20 72 32 2c 20 72 38 |..ORR.r9, r2, r8|
00001600 2c 20 4c 53 4c 20 72 30 0a 09 4d 4f 56 09 72 32 |, LSL r0..MOV.r2|
00001610 2c 20 72 38 2c 20 4c 53 52 20 72 31 0a 09 4c 44 |, r8, LSR r1..LD|
00001620 52 09 72 38 2c 20 5b 72 31 30 5d 09 09 09 3b 20 |R.r8, [r10]...; |
00001630 73 63 72 65 65 6e 20 64 61 74 61 0a 09 4f 52 52 |screen data..ORR|
00001640 09 72 31 33 2c 20 72 39 2c 20 72 39 2c 20 4c 53 |.r13, r9, r9, LS|
00001650 4c 20 23 32 0a 09 4f 52 52 09 72 31 33 2c 20 72 |L #2..ORR.r13, r|
00001660 31 33 2c 20 72 31 33 2c 20 4c 53 4c 20 23 31 0a |13, r13, LSL #1.|
00001670 09 41 4e 44 09 72 31 33 2c 20 72 31 33 2c 20 72 |.AND.r13, r13, r|
00001680 31 34 0a 09 42 49 43 09 72 31 33 2c 20 72 31 33 |14..BIC.r13, r13|
00001690 2c 20 72 38 0a 09 4f 52 52 09 72 31 33 2c 20 72 |, r8..ORR.r13, r|
000016a0 31 33 2c 20 72 31 33 2c 20 4c 53 52 20 23 31 0a |13, r13, LSR #1.|
000016b0 09 4f 52 52 09 72 31 33 2c 20 72 31 33 2c 20 72 |.ORR.r13, r13, r|
000016c0 31 33 2c 20 4c 53 52 20 23 32 0a 09 41 4e 44 09 |13, LSR #2..AND.|
000016d0 72 39 2c 20 72 39 2c 20 72 31 33 0a 09 42 49 43 |r9, r9, r13..BIC|
000016e0 09 72 38 2c 20 72 38 2c 20 72 31 33 0a 09 4f 52 |.r8, r8, r13..OR|
000016f0 52 09 72 39 2c 20 72 38 2c 20 72 39 0a 09 53 54 |R.r9, r8, r9..ST|
00001700 52 09 72 39 2c 20 5b 72 31 30 5d 2c 20 23 34 0a |R.r9, [r10], #4.|
00001710 09 53 55 42 53 09 72 31 31 2c 20 72 31 31 2c 20 |.SUBS.r11, r11, |
00001720 23 31 0a 09 42 47 54 09 70 68 5f 6e 65 78 74 63 |#1..BGT.ph_nextc|
00001730 6f 6c 0a 70 68 5f 65 6e 64 63 6f 6c 0a 09 43 4d |ol.ph_endcol..CM|
00001740 50 09 72 30 2c 20 23 30 0a 09 42 45 51 09 70 68 |P.r0, #0..BEQ.ph|
00001750 5f 64 6f 6e 65 63 6f 6c 0a 09 4c 44 52 09 72 38 |_donecol..LDR.r8|
00001760 2c 20 5b 72 31 30 5d 09 09 09 3b 20 73 63 72 65 |, [r10]...; scre|
00001770 65 6e 20 64 61 74 61 0a 09 4f 52 52 09 72 31 33 |en data..ORR.r13|
00001780 2c 20 72 32 2c 20 72 32 2c 20 4c 53 4c 20 23 32 |, r2, r2, LSL #2|
00001790 0a 09 4f 52 52 09 72 31 33 2c 20 72 31 33 2c 20 |..ORR.r13, r13, |
000017a0 72 31 33 2c 20 4c 53 4c 20 23 31 0a 09 41 4e 44 |r13, LSL #1..AND|
000017b0 09 72 31 33 2c 20 72 31 33 2c 20 72 31 34 0a 09 |.r13, r13, r14..|
000017c0 42 49 43 09 72 31 33 2c 20 72 31 33 2c 20 72 38 |BIC.r13, r13, r8|
000017d0 0a 09 4f 52 52 09 72 31 33 2c 20 72 31 33 2c 20 |..ORR.r13, r13, |
000017e0 72 31 33 2c 20 4c 53 52 20 23 31 0a 09 4f 52 52 |r13, LSR #1..ORR|
000017f0 09 72 31 33 2c 20 72 31 33 2c 20 72 31 33 2c 20 |.r13, r13, r13, |
00001800 4c 53 52 20 23 32 0a 09 41 4e 44 09 72 32 2c 20 |LSR #2..AND.r2, |
00001810 72 32 2c 20 72 31 33 0a 09 42 49 43 09 72 38 2c |r2, r13..BIC.r8,|
00001820 20 72 38 2c 20 72 31 33 0a 09 4f 52 52 09 72 32 | r8, r13..ORR.r2|
00001830 2c 20 72 38 2c 20 72 32 0a 09 53 54 52 09 72 32 |, r8, r2..STR.r2|
00001840 2c 20 5b 72 31 30 5d 2c 20 23 34 0a 70 68 5f 64 |, [r10], #4.ph_d|
00001850 6f 6e 65 63 6f 6c 0a 09 41 44 44 09 72 34 2c 20 |onecol..ADD.r4, |
00001860 72 34 2c 20 72 31 32 2c 20 4c 53 4c 20 23 32 0a |r4, r12, LSL #2.|
00001870 09 41 44 44 09 72 35 2c 20 72 35 2c 20 23 33 32 |.ADD.r5, r5, #32|
00001880 30 0a 09 53 55 42 53 09 72 36 2c 20 72 36 2c 20 |0..SUBS.r6, r6, |
00001890 23 31 0a 09 42 47 54 09 70 68 5f 6e 65 78 74 72 |#1..BGT.ph_nextr|
000018a0 6f 77 0a 0a 70 68 5f 65 78 69 74 09 4c 44 52 09 |ow..ph_exit.LDR.|
000018b0 73 70 2c 20 70 68 73 70 0a 09 4c 44 4d 46 44 09 |sp, phsp..LDMFD.|
000018c0 73 70 21 2c 20 7b 72 34 2d 72 39 2c 20 73 6c 2c |sp!, {r4-r9, sl,|
000018d0 20 66 70 2c 20 70 63 7d 5e 0a 0a 0a 0a 3b 20 70 | fp, pc}^....; p|
000018e0 6c 6f 74 5f 6e 75 6d 62 65 72 0a 3b 20 61 20 6c |lot_number.; a l|
000018f0 65 61 66 20 41 50 43 53 20 66 75 6e 63 74 69 6f |eaf APCS functio|
00001900 6e 0a 3b 0a 3b 20 43 20 70 72 6f 74 6f 74 79 70 |n.;.; C prototyp|
00001910 65 3a 0a 3b 20 76 6f 69 64 20 70 6c 6f 74 5f 6e |e:.; void plot_n|
00001920 75 6d 62 65 72 28 76 6f 69 64 20 2a 61 72 65 61 |umber(void *area|
00001930 2c 20 76 6f 69 64 20 2a 73 70 72 2c 20 69 6e 74 |, void *spr, int|
00001940 20 78 2c 20 69 6e 74 20 79 29 3b 0a 3b 0a 3b 20 | x, int y);.;.; |
00001950 6e 62 20 20 61 73 73 75 6d 65 73 20 66 69 74 73 |nb assumes fits|
00001960 20 6f 6e 20 73 63 72 65 65 6e 20 26 20 63 61 6e | on screen & can|
00001970 20 64 6f 20 61 20 66 61 73 74 20 70 6c 6f 74 20 | do a fast plot |
00001980 77 69 74 68 20 6e 6f 20 63 6c 69 70 70 69 6e 67 |with no clipping|
00001990 0a 3b 20 61 6c 73 6f 20 74 68 61 74 20 69 73 20 |.; also that is |
000019a0 62 65 69 6e 67 20 70 72 69 6e 74 65 64 20 61 74 |being printed at|
000019b0 20 61 20 77 6f 72 64 20 61 6c 69 67 6e 65 64 20 | a word aligned |
000019c0 61 64 64 72 65 73 73 20 28 69 65 20 78 20 69 73 |address (ie x is|
000019d0 20 61 20 6d 75 6c 74 69 70 6c 65 20 6f 66 20 38 | a multiple of 8|
000019e0 29 0a 3b 20 61 73 73 75 6d 65 73 20 73 70 72 69 |).; assumes spri|
000019f0 74 65 20 69 73 20 33 32 20 62 79 20 68 74 20 70 |te is 32 by ht p|
00001a00 69 78 65 6c 73 2c 20 34 62 70 70 20 26 20 73 63 |ixels, 4bpp & sc|
00001a10 72 65 65 6e 20 6d 6f 64 65 20 69 73 20 36 34 30 |reen mode is 640|
00001a20 20 70 69 78 65 6c 73 20 77 69 64 65 0a 3b 20 28 | pixels wide.; (|
00001a30 68 74 20 3d 20 33 32 20 69 66 20 76 67 61 20 65 |ht = 32 if vga e|
00001a40 6c 73 65 20 31 36 29 0a 3b 0a 0a 09 4d 41 43 52 |lse 16).;...MACR|
00001a50 4f 0a 24 6c 61 62 65 6c 20 20 70 6e 5f 73 65 67 |O.$label pn_seg|
00001a60 09 24 72 31 2c 20 24 72 32 0a 09 41 53 53 45 52 |.$r1, $r2..ASSER|
00001a70 54 09 24 72 31 20 3c 3e 20 24 72 32 0a 24 6c 61 |T.$r1 <> $r2.$la|
00001a80 62 65 6c 09 41 4e 44 09 72 31 2c 20 72 31 34 2c |bel.AND.r1, r14,|
00001a90 20 24 72 32 0a 09 41 4e 44 09 72 30 2c 20 72 31 | $r2..AND.r0, r1|
00001aa0 34 2c 20 24 72 32 2c 20 4c 53 52 20 23 34 0a 09 |4, $r2, LSR #4..|
00001ab0 41 4e 44 09 24 72 32 2c 20 72 31 34 2c 20 24 72 |AND.$r2, r14, $r|
00001ac0 31 0a 09 41 4e 44 09 24 72 31 2c 20 72 31 34 2c |1..AND.$r1, r14,|
00001ad0 20 24 72 31 2c 20 4c 53 52 20 23 34 0a 09 41 44 | $r1, LSR #4..AD|
00001ae0 44 09 24 72 32 2c 20 24 72 32 2c 20 72 31 0a 09 |D.$r2, $r2, r1..|
00001af0 41 44 44 09 24 72 31 2c 20 24 72 31 2c 20 72 30 |ADD.$r1, $r1, r0|
00001b00 0a 09 41 4e 44 09 72 31 2c 20 72 31 34 2c 20 24 |..AND.r1, r14, $|
00001b10 72 32 2c 20 4c 53 52 20 23 34 0a 09 41 4e 44 09 |r2, LSR #4..AND.|
00001b20 72 30 2c 20 72 31 34 2c 20 24 72 31 2c 20 4c 53 |r0, r14, $r1, LS|
00001b30 52 20 23 34 0a 09 41 4e 44 09 24 72 32 2c 20 72 |R #4..AND.$r2, r|
00001b40 31 34 2c 20 24 72 32 0a 09 41 4e 44 09 24 72 31 |14, $r2..AND.$r1|
00001b50 2c 20 72 31 34 2c 20 24 72 31 0a 09 4f 52 52 09 |, r14, $r1..ORR.|
00001b60 72 31 2c 20 72 31 2c 20 72 31 2c 20 4c 53 4c 20 |r1, r1, r1, LSL |
00001b70 23 31 0a 09 4f 52 52 09 72 30 2c 20 72 30 2c 20 |#1..ORR.r0, r0, |
00001b80 72 30 2c 20 4c 53 4c 20 23 31 0a 09 4f 52 52 09 |r0, LSL #1..ORR.|
00001b90 72 31 2c 20 72 31 2c 20 72 31 2c 20 4c 53 4c 20 |r1, r1, r1, LSL |
00001ba0 23 32 0a 09 4f 52 52 09 72 30 2c 20 72 30 2c 20 |#2..ORR.r0, r0, |
00001bb0 72 30 2c 20 4c 53 4c 20 23 32 0a 09 4f 52 52 09 |r0, LSL #2..ORR.|
00001bc0 24 72 32 2c 20 24 72 32 2c 20 72 31 0a 09 4f 52 |$r2, $r2, r1..OR|
00001bd0 52 09 24 72 31 2c 20 24 72 31 2c 20 72 30 0a 09 |R.$r1, $r1, r0..|
00001be0 4f 52 52 09 24 72 32 2c 20 24 72 32 2c 20 24 72 |ORR.$r2, $r2, $r|
00001bf0 31 2c 20 4c 53 4c 20 23 34 0a 09 4d 45 4e 44 0a |1, LSL #4..MEND.|
00001c00 0a 09 45 58 50 4f 52 54 09 70 6c 6f 74 5f 6e 75 |..EXPORT.plot_nu|
00001c10 6d 62 65 72 0a 0a 70 6e 6e 73 74 61 09 44 43 42 |mber..pnnsta.DCB|
00001c20 09 22 70 6c 6f 74 5f 6e 75 6d 62 65 72 22 2c 20 |."plot_number", |
00001c30 30 0a 09 41 4c 49 47 4e 0a 70 6e 6e 65 6e 64 09 |0..ALIGN.pnnend.|
00001c40 44 43 44 09 26 66 66 30 30 30 30 30 30 20 2b 20 |DCD.&ff000000 + |
00001c50 70 6e 6e 65 6e 64 20 2d 20 70 6e 6e 73 74 61 0a |pnnend - pnnsta.|
00001c60 0a 70 6e 73 70 09 44 43 44 09 30 0a 0a 70 6c 6f |.pnsp.DCD.0..plo|
00001c70 74 5f 6e 75 6d 62 65 72 0a 0a 09 53 54 4d 46 44 |t_number...STMFD|
00001c80 09 73 70 21 2c 20 7b 72 34 2d 72 39 2c 20 73 6c |.sp!, {r4-r9, sl|
00001c90 2c 20 66 70 2c 20 6c 72 7d 0a 09 53 54 52 09 73 |, fp, lr}..STR.s|
00001ca0 70 2c 20 70 6e 73 70 0a 09 41 44 52 09 72 34 2c |p, pnsp..ADR.r4,|
00001cb0 20 76 62 6c 73 0a 09 4c 44 4d 49 41 09 72 34 2c | vbls..LDMIA.r4,|
00001cc0 20 7b 72 34 2d 72 39 7d 0a 09 4c 44 52 09 72 34 | {r4-r9}..LDR.r4|
00001cd0 2c 20 5b 72 62 61 6e 6b 5d 0a 09 53 55 42 09 72 |, [rbank]..SUB.r|
00001ce0 34 2c 20 72 34 2c 20 23 31 0a 09 4c 44 52 09 72 |4, r4, #1..LDR.r|
00001cf0 35 2c 20 5b 72 73 63 72 73 74 2c 20 72 34 2c 20 |5, [rscrst, r4, |
00001d00 4c 53 4c 20 23 32 5d 09 3b 20 73 63 72 65 65 6e |LSL #2].; screen|
00001d10 20 62 61 73 65 20 61 64 64 72 20 66 6f 72 20 56 | base addr for V|
00001d20 44 55 20 6f 75 74 70 75 74 0a 09 4c 44 52 09 72 |DU output..LDR.r|
00001d30 6f 78 2c 20 5b 72 6f 78 5d 0a 09 4c 44 52 09 72 |ox, [rox]..LDR.r|
00001d40 6f 79 2c 20 5b 72 6f 79 5d 0a 09 4c 44 52 09 72 |oy, [roy]..LDR.r|
00001d50 6c 78 2c 20 5b 72 6c 78 5d 0a 09 4c 44 52 09 72 |lx, [rlx]..LDR.r|
00001d60 6c 79 2c 20 5b 72 6c 79 5d 0a 09 41 44 44 09 72 |ly, [rly]..ADD.r|
00001d70 31 30 2c 20 78 2c 20 72 6f 78 0a 09 52 53 42 09 |10, x, rox..RSB.|
00001d80 72 31 31 2c 20 79 2c 20 72 6f 79 0a 09 53 55 42 |r11, y, roy..SUB|
00001d90 09 72 31 31 2c 20 72 31 31 2c 20 23 36 34 0a 09 |.r11, r11, #64..|
00001da0 4d 4f 56 09 72 31 30 2c 20 72 31 30 2c 20 41 53 |MOV.r10, r10, AS|
00001db0 52 20 72 6c 78 09 09 3b 20 78 20 70 69 78 65 6c |R rlx..; x pixel|
00001dc0 20 63 6f 6f 72 64 20 72 65 6c 20 6c 65 66 74 20 | coord rel left |
00001dd0 73 63 72 65 65 6e 20 7d 20 6f 66 20 74 6f 70 20 |screen } of top |
00001de0 6c 65 66 74 0a 09 4d 4f 56 09 72 31 31 2c 20 72 |left..MOV.r11, r|
00001df0 31 31 2c 20 41 53 52 20 72 6c 79 09 09 3b 20 79 |11, ASR rly..; y|
00001e00 20 70 69 78 65 6c 20 63 6f 6f 72 64 20 72 65 6c | pixel coord rel|
00001e10 20 74 6f 70 20 73 63 72 65 65 6e 20 20 7d 20 6f | top screen } o|
00001e20 66 20 6f 62 6a 65 63 74 0a 09 41 44 44 09 72 31 |f object..ADD.r1|
00001e30 31 2c 20 72 31 31 2c 20 23 31 0a 09 41 44 44 09 |1, r11, #1..ADD.|
00001e40 72 31 31 2c 20 72 31 31 2c 20 72 31 31 2c 20 41 |r11, r11, r11, A|
00001e50 53 4c 20 23 32 0a 09 41 44 44 09 72 35 2c 20 72 |SL #2..ADD.r5, r|
00001e60 35 2c 20 72 31 31 2c 20 41 53 4c 20 23 36 0a 09 |5, r11, ASL #6..|
00001e70 42 49 43 09 72 31 30 2c 20 72 31 30 2c 20 23 37 |BIC.r10, r10, #7|
00001e80 0a 09 41 44 44 09 72 35 2c 20 72 35 2c 20 72 31 |..ADD.r5, r5, r1|
00001e90 30 2c 20 41 53 52 20 23 31 09 09 3b 20 73 63 72 |0, ASR #1..; scr|
00001ea0 65 65 6e 20 74 6f 70 20 6c 65 66 74 20 6f 66 20 |een top left of |
00001eb0 6e 75 6d 62 65 72 0a 09 4c 44 52 09 72 34 2c 20 |number..LDR.r4, |
00001ec0 5b 73 70 72 2c 20 23 69 6d 61 67 65 5d 0a 09 41 |[spr, #image]..A|
00001ed0 44 44 09 72 34 2c 20 73 70 72 2c 20 72 34 09 09 |DD.r4, spr, r4..|
00001ee0 09 3b 20 6e 75 6d 62 65 72 20 73 70 72 69 74 65 |.; number sprite|
00001ef0 20 74 6f 70 20 6c 65 66 74 0a 09 4d 4f 56 09 72 | top left..MOV.r|
00001f00 33 2c 20 23 36 34 0a 09 4d 4f 56 09 72 33 2c 20 |3, #64..MOV.r3, |
00001f10 72 33 2c 20 41 53 52 20 72 6c 79 0a 09 4d 4f 56 |r3, ASR rly..MOV|
00001f20 09 72 31 34 2c 20 23 26 30 66 0a 09 4f 52 52 09 |.r14, #&0f..ORR.|
00001f30 72 31 34 2c 20 72 31 34 2c 20 72 31 34 2c 20 4c |r14, r14, r14, L|
00001f40 53 4c 20 23 38 0a 09 4f 52 52 09 72 31 34 2c 20 |SL #8..ORR.r14, |
00001f50 72 31 34 2c 20 72 31 34 2c 20 4c 53 4c 20 23 31 |r14, r14, LSL #1|
00001f60 36 0a 70 6e 5f 6c 6f 6f 70 09 4c 44 4d 49 41 09 |6.pn_loop.LDMIA.|
00001f70 72 34 21 2c 20 7b 72 36 2c 72 37 2c 72 38 2c 72 |r4!, {r6,r7,r8,r|
00001f80 39 7d 0a 09 4c 44 4d 49 41 09 72 35 2c 20 7b 72 |9}..LDMIA.r5, {r|
00001f90 31 30 2c 72 31 31 2c 72 31 32 2c 72 31 33 7d 0a |10,r11,r12,r13}.|
00001fa0 09 70 6e 5f 73 65 67 09 72 36 2c 20 72 31 30 0a |.pn_seg.r6, r10.|
00001fb0 09 70 6e 5f 73 65 67 09 72 37 2c 20 72 31 31 0a |.pn_seg.r7, r11.|
00001fc0 09 70 6e 5f 73 65 67 09 72 38 2c 20 72 31 32 0a |.pn_seg.r8, r12.|
00001fd0 09 70 6e 5f 73 65 67 09 72 39 2c 20 72 31 33 0a |.pn_seg.r9, r13.|
00001fe0 09 53 54 4d 49 41 20 20 20 72 35 2c 20 7b 72 31 |.STMIA r5, {r1|
00001ff0 30 2c 72 31 31 2c 72 31 32 2c 72 31 33 7d 0a 09 |0,r11,r12,r13}..|
00002000 41 44 44 09 72 35 2c 20 72 35 2c 20 23 33 32 30 |ADD.r5, r5, #320|
00002010 0a 09 53 55 42 53 09 72 33 2c 20 72 33 2c 20 23 |..SUBS.r3, r3, #|
00002020 31 0a 09 42 4e 45 09 70 6e 5f 6c 6f 6f 70 0a 70 |1..BNE.pn_loop.p|
00002030 6e 5f 65 78 69 74 09 4c 44 52 09 73 70 2c 20 70 |n_exit.LDR.sp, p|
00002040 6e 73 70 0a 09 4c 44 4d 46 44 09 73 70 21 2c 20 |nsp..LDMFD.sp!, |
00002050 7b 72 34 2d 72 39 2c 20 73 6c 2c 20 66 70 2c 20 |{r4-r9, sl, fp, |
00002060 70 63 7d 5e 0a 0a 0a 0a 3b 20 70 6c 6f 74 5f 62 |pc}^....; plot_b|
00002070 61 72 0a 3b 20 61 20 6c 65 61 66 20 41 50 43 53 |ar.; a leaf APCS|
00002080 20 66 75 6e 63 74 69 6f 6e 0a 3b 0a 3b 20 43 20 | function.;.; C |
00002090 70 72 6f 74 6f 74 79 70 65 3a 0a 3b 20 76 6f 69 |prototype:.; voi|
000020a0 64 20 70 6c 6f 74 5f 62 61 72 28 69 6e 74 20 78 |d plot_bar(int x|
000020b0 2c 20 69 6e 74 20 79 2c 20 69 6e 74 20 77 2c 20 |, int y, int w, |
000020c0 69 6e 74 20 68 2c 20 69 6e 74 20 63 29 3b 0a 3b |int h, int c);.;|
000020d0 0a 3b 20 70 6c 6f 74 20 61 20 62 6c 61 6e 6b 20 |.; plot a blank |
000020e0 72 65 63 74 61 6e 67 6c 65 20 6f 66 20 77 69 64 |rectangle of wid|
000020f0 74 68 20 77 2c 20 68 65 69 67 68 74 20 68 2c 20 |th w, height h, |
00002100 62 6f 74 74 6f 6d 20 6c 65 66 74 20 61 74 20 78 |bottom left at x|
00002110 2c 20 79 20 69 6e 20 63 6f 6c 6f 75 72 20 63 0a |, y in colour c.|
00002120 3b 20 61 73 73 75 6d 65 20 6d 6f 64 65 20 69 73 |; assume mode is|
00002130 20 36 34 30 20 70 69 78 65 6c 73 20 77 69 64 65 | 640 pixels wide|
00002140 20 34 62 70 70 20 26 20 72 65 63 74 61 6e 67 6c | 4bpp & rectangl|
00002150 65 20 6c 69 65 73 20 77 69 74 68 69 6e 20 73 63 |e lies within sc|
00002160 72 65 65 6e 20 61 72 65 61 0a 3b 20 61 6c 73 6f |reen area.; also|
00002170 2c 20 74 68 61 74 20 78 20 69 73 20 61 20 6d 75 |, that x is a mu|
00002180 6c 74 69 70 6c 65 20 6f 66 20 32 20 61 73 20 69 |ltiple of 2 as i|
00002190 73 20 77 0a 3b 0a 09 45 58 50 4f 52 54 09 70 6c |s w.;..EXPORT.pl|
000021a0 6f 74 5f 62 61 72 0a 0a 72 66 6e 73 74 61 09 44 |ot_bar..rfnsta.D|
000021b0 43 42 09 22 70 6c 6f 74 5f 62 61 72 22 2c 20 30 |CB."plot_bar", 0|
000021c0 0a 09 41 4c 49 47 4e 0a 72 66 6e 65 6e 64 09 44 |..ALIGN.rfnend.D|
000021d0 43 44 09 26 66 66 30 30 30 30 30 30 20 2b 20 72 |CD.&ff000000 + r|
000021e0 66 6e 65 6e 64 20 2d 20 72 66 6e 73 74 61 0a 0a |fnend - rfnsta..|
000021f0 70 6c 6f 74 5f 62 61 72 0a 0a 09 4c 44 52 09 69 |plot_bar...LDR.i|
00002200 70 2c 20 5b 73 70 5d 09 09 09 3b 20 63 6f 6c 6f |p, [sp]...; colo|
00002210 75 72 20 69 6e 20 72 31 32 0a 09 53 54 4d 46 44 |ur in r12..STMFD|
00002220 09 73 70 21 2c 20 7b 72 34 2d 72 39 2c 20 73 6c |.sp!, {r4-r9, sl|
00002230 2c 20 66 70 2c 20 6c 72 7d 0a 09 43 4d 50 09 77 |, fp, lr}..CMP.w|
00002240 5f 72 2c 20 23 30 0a 09 41 44 44 4d 49 09 78 5f |_r, #0..ADDMI.x_|
00002250 72 2c 20 78 5f 72 2c 20 77 5f 72 0a 09 41 44 44 |r, x_r, w_r..ADD|
00002260 4d 49 09 78 5f 72 2c 20 78 5f 72 2c 20 23 31 0a |MI.x_r, x_r, #1.|
00002270 09 52 53 42 4d 49 09 77 5f 72 2c 20 77 5f 72 2c |.RSBMI.w_r, w_r,|
00002280 20 23 30 0a 09 43 4d 50 09 68 5f 72 2c 20 23 30 | #0..CMP.h_r, #0|
00002290 0a 09 41 44 44 4d 49 09 79 5f 72 2c 20 79 5f 72 |..ADDMI.y_r, y_r|
000022a0 2c 20 68 5f 72 0a 09 41 44 44 4d 49 09 79 5f 72 |, h_r..ADDMI.y_r|
000022b0 2c 20 79 5f 72 2c 20 23 31 0a 09 52 53 42 4d 49 |, y_r, #1..RSBMI|
000022c0 09 68 5f 72 2c 20 68 5f 72 2c 20 23 30 0a 09 41 |.h_r, h_r, #0..A|
000022d0 44 52 4c 09 72 34 2c 20 76 62 6c 73 0a 09 4c 44 |DRL.r4, vbls..LD|
000022e0 4d 49 41 09 72 34 2c 20 7b 72 34 2d 72 39 7d 0a |MIA.r4, {r4-r9}.|
000022f0 09 4c 44 52 09 72 34 2c 20 5b 72 62 61 6e 6b 5d |.LDR.r4, [rbank]|
00002300 0a 09 53 55 42 09 72 34 2c 20 72 34 2c 20 23 31 |..SUB.r4, r4, #1|
00002310 0a 09 4c 44 52 09 72 35 2c 20 5b 72 73 63 72 73 |..LDR.r5, [rscrs|
00002320 74 2c 20 72 34 2c 20 4c 53 4c 20 23 32 5d 09 3b |t, r4, LSL #2].;|
00002330 20 73 63 72 65 65 6e 20 62 61 73 65 20 61 64 64 | screen base add|
00002340 72 20 66 6f 72 20 56 44 55 20 6f 75 74 70 75 74 |r for VDU output|
00002350 0a 09 4c 44 52 09 72 6f 78 2c 20 5b 72 6f 78 5d |..LDR.rox, [rox]|
00002360 0a 09 4c 44 52 09 72 6f 79 2c 20 5b 72 6f 79 5d |..LDR.roy, [roy]|
00002370 0a 09 4c 44 52 09 72 6c 78 2c 20 5b 72 6c 78 5d |..LDR.rlx, [rlx]|
00002380 0a 09 41 44 44 09 72 6c 78 2c 20 72 6c 78 2c 20 |..ADD.rlx, rlx, |
00002390 23 31 0a 09 4c 44 52 09 72 6c 79 2c 20 5b 72 6c |#1..LDR.rly, [rl|
000023a0 79 5d 0a 09 41 44 44 09 72 31 30 2c 20 78 5f 72 |y]..ADD.r10, x_r|
000023b0 2c 20 72 6f 78 0a 09 52 53 42 09 72 31 31 2c 20 |, rox..RSB.r11, |
000023c0 79 5f 72 2c 20 72 6f 79 0a 09 4d 4f 56 09 72 31 |y_r, roy..MOV.r1|
000023d0 30 2c 20 72 31 30 2c 20 41 53 52 20 72 6c 78 09 |0, r10, ASR rlx.|
000023e0 09 3b 20 78 20 62 79 74 65 20 63 6f 6f 72 64 20 |.; x byte coord |
000023f0 72 65 6c 20 6c 65 66 74 20 73 63 72 65 65 6e 20 |rel left screen |
00002400 7d 20 6f 66 20 62 6f 74 74 6f 6d 20 6c 65 66 74 |} of bottom left|
00002410 0a 09 4d 4f 56 09 72 31 31 2c 20 72 31 31 2c 20 |..MOV.r11, r11, |
00002420 41 53 52 20 72 6c 79 09 09 3b 20 79 20 70 69 78 |ASR rly..; y pix|
00002430 65 6c 20 63 6f 6f 72 64 20 72 65 6c 20 74 6f 70 |el coord rel top|
00002440 20 73 63 72 65 65 6e 20 20 7d 20 6f 66 20 72 65 | screen } of re|
00002450 63 74 61 6e 67 6c 65 0a 09 4d 4f 56 09 77 5f 72 |ctangle..MOV.w_r|
00002460 2c 20 77 5f 72 2c 20 41 53 52 20 72 6c 78 09 09 |, w_r, ASR rlx..|
00002470 3b 20 77 69 64 74 68 20 72 6f 77 20 69 6e 20 62 |; width row in b|
00002480 79 74 65 73 0a 09 4d 4f 56 09 68 5f 72 2c 20 68 |ytes..MOV.h_r, h|
00002490 5f 72 2c 20 41 53 52 20 72 6c 79 0a 09 41 44 44 |_r, ASR rly..ADD|
000024a0 09 72 31 31 2c 20 72 31 31 2c 20 23 31 0a 09 53 |.r11, r11, #1..S|
000024b0 55 42 09 72 31 31 2c 20 72 31 31 2c 20 68 5f 72 |UB.r11, r11, h_r|
000024c0 09 09 09 3b 20 79 20 70 69 78 65 6c 20 63 6f 6f |...; y pixel coo|
000024d0 72 64 20 74 6f 70 20 72 65 63 74 61 6e 67 6c 65 |rd top rectangle|
000024e0 0a 09 41 44 44 09 72 31 34 2c 20 72 31 30 2c 20 |..ADD.r14, r10, |
000024f0 77 5f 72 09 09 09 3b 20 78 20 62 79 74 65 20 63 |w_r...; x byte c|
00002500 6f 6f 72 64 20 6a 75 73 74 20 62 65 79 6f 6e 64 |oord just beyond|
00002510 20 72 69 67 68 74 20 73 69 64 65 0a 09 41 44 44 | right side..ADD|
00002520 09 72 31 31 2c 20 72 31 31 2c 20 72 31 31 2c 20 |.r11, r11, r11, |
00002530 41 53 4c 20 23 32 0a 09 41 44 44 09 72 35 2c 20 |ASL #2..ADD.r5, |
00002540 72 35 2c 20 72 31 31 2c 20 41 53 4c 20 23 36 0a |r5, r11, ASL #6.|
00002550 09 41 44 44 09 72 35 2c 20 72 35 2c 20 72 31 30 |.ADD.r5, r5, r10|
00002560 0a 09 52 53 42 09 72 36 2c 20 72 31 30 2c 20 23 |..RSB.r6, r10, #|
00002570 34 0a 09 41 4e 44 09 72 36 2c 20 72 36 2c 20 23 |4..AND.r6, r6, #|
00002580 33 09 09 09 3b 20 23 20 70 69 78 65 6c 73 20 6f |3...; # pixels o|
00002590 6e 20 72 6f 77 20 6c 65 66 74 20 75 70 74 6f 20 |n row left upto |
000025a0 77 6f 72 64 20 62 6f 75 6e 64 61 72 79 0a 09 41 |word boundary..A|
000025b0 44 44 09 72 31 30 2c 20 72 31 30 2c 20 72 36 0a |DD.r10, r10, r6.|
000025c0 09 41 4e 44 09 72 37 2c 20 72 31 34 2c 20 23 33 |.AND.r7, r14, #3|
000025d0 09 09 09 3b 20 23 20 70 69 78 65 6c 73 20 6f 6e |...; # pixels on|
000025e0 20 72 6f 77 20 72 69 67 68 74 20 62 65 79 6f 6e | row right beyon|
000025f0 64 20 77 6f 72 64 20 62 64 72 79 0a 09 53 55 42 |d word bdry..SUB|
00002600 09 72 38 2c 20 72 31 34 2c 20 72 31 30 0a 09 4d |.r8, r14, r10..M|
00002610 4f 56 09 72 38 2c 20 72 38 2c 20 41 53 52 20 23 |OV.r8, r8, ASR #|
00002620 32 09 09 09 3b 20 23 20 77 68 6f 6c 65 20 77 6f |2...; # whole wo|
00002630 72 64 73 20 6f 6e 20 65 61 63 68 20 72 6f 77 0a |rds on each row.|
00002640 09 4f 52 52 09 72 30 2c 20 63 5f 72 2c 20 63 5f |.ORR.r0, c_r, c_|
00002650 72 2c 20 4c 53 4c 20 23 34 0a 09 4f 52 52 09 72 |r, LSL #4..ORR.r|
00002660 30 2c 20 72 30 2c 20 72 30 2c 20 4c 53 4c 20 23 |0, r0, r0, LSL #|
00002670 38 0a 09 4f 52 52 09 72 30 2c 20 72 30 2c 20 72 |8..ORR.r0, r0, r|
00002680 30 2c 20 4c 53 4c 20 23 31 36 0a 72 66 5f 6e 65 |0, LSL #16.rf_ne|
00002690 78 74 72 6f 77 0a 09 4d 4f 56 09 72 31 30 2c 20 |xtrow..MOV.r10, |
000026a0 72 35 0a 09 4d 4f 56 53 09 72 31 31 2c 20 72 36 |r5..MOVS.r11, r6|
000026b0 0a 09 42 45 51 09 72 66 5f 72 6f 77 77 6f 72 64 |..BEQ.rf_rowword|
000026c0 73 0a 09 53 54 52 42 09 72 30 2c 20 5b 72 31 30 |s..STRB.r0, [r10|
000026d0 5d 2c 20 23 31 0a 09 53 55 42 53 09 72 31 31 2c |], #1..SUBS.r11,|
000026e0 20 72 31 31 2c 20 23 31 0a 09 42 45 51 09 72 66 | r11, #1..BEQ.rf|
000026f0 5f 72 6f 77 77 6f 72 64 73 0a 09 53 54 52 42 09 |_rowwords..STRB.|
00002700 72 30 2c 20 5b 72 31 30 5d 2c 20 23 31 0a 09 53 |r0, [r10], #1..S|
00002710 55 42 53 09 72 31 31 2c 20 72 31 31 2c 20 23 31 |UBS.r11, r11, #1|
00002720 0a 09 42 45 51 09 72 66 5f 72 6f 77 77 6f 72 64 |..BEQ.rf_rowword|
00002730 73 0a 09 53 54 52 42 09 72 30 2c 20 5b 72 31 30 |s..STRB.r0, [r10|
00002740 5d 2c 20 23 31 0a 72 66 5f 72 6f 77 77 6f 72 64 |], #1.rf_rowword|
00002750 73 0a 09 4d 4f 56 53 09 72 31 31 2c 20 72 38 0a |s..MOVS.r11, r8.|
00002760 09 42 45 51 09 72 66 5f 72 6f 77 65 6e 64 77 6f |.BEQ.rf_rowendwo|
00002770 72 64 73 0a 72 66 5f 72 6f 77 77 6f 72 64 73 63 |rds.rf_rowwordsc|
00002780 6f 6e 74 0a 09 53 54 52 09 72 30 2c 20 5b 72 31 |ont..STR.r0, [r1|
00002790 30 5d 2c 20 23 34 0a 09 53 55 42 53 09 72 31 31 |0], #4..SUBS.r11|
000027a0 2c 20 72 31 31 2c 20 23 31 0a 09 42 45 51 09 72 |, r11, #1..BEQ.r|
000027b0 66 5f 72 6f 77 65 6e 64 77 6f 72 64 73 0a 09 53 |f_rowendwords..S|
000027c0 54 52 09 72 30 2c 20 5b 72 31 30 5d 2c 20 23 34 |TR.r0, [r10], #4|
000027d0 0a 09 53 55 42 53 09 72 31 31 2c 20 72 31 31 2c |..SUBS.r11, r11,|
000027e0 20 23 31 0a 09 42 45 51 09 72 66 5f 72 6f 77 65 | #1..BEQ.rf_rowe|
000027f0 6e 64 77 6f 72 64 73 0a 09 53 54 52 09 72 30 2c |ndwords..STR.r0,|
00002800 20 5b 72 31 30 5d 2c 20 23 34 0a 09 53 55 42 53 | [r10], #4..SUBS|
00002810 09 72 31 31 2c 20 72 31 31 2c 20 23 31 0a 09 42 |.r11, r11, #1..B|
00002820 45 51 09 72 66 5f 72 6f 77 65 6e 64 77 6f 72 64 |EQ.rf_rowendword|
00002830 73 0a 09 53 54 52 09 72 30 2c 20 5b 72 31 30 5d |s..STR.r0, [r10]|
00002840 2c 20 23 34 0a 09 53 55 42 53 09 72 31 31 2c 20 |, #4..SUBS.r11, |
00002850 72 31 31 2c 20 23 31 0a 09 42 4e 45 09 72 66 5f |r11, #1..BNE.rf_|
00002860 72 6f 77 77 6f 72 64 73 63 6f 6e 74 0a 72 66 5f |rowwordscont.rf_|
00002870 72 6f 77 65 6e 64 77 6f 72 64 73 0a 09 4d 4f 56 |rowendwords..MOV|
00002880 53 09 72 31 31 2c 20 72 37 0a 09 42 45 51 09 72 |S.r11, r7..BEQ.r|
00002890 66 5f 65 6e 64 72 6f 77 0a 09 53 54 52 42 09 72 |f_endrow..STRB.r|
000028a0 30 2c 20 5b 72 31 30 5d 2c 20 23 31 0a 09 53 55 |0, [r10], #1..SU|
000028b0 42 53 09 72 31 31 2c 20 72 31 31 2c 20 23 31 0a |BS.r11, r11, #1.|
000028c0 09 42 45 51 09 72 66 5f 65 6e 64 72 6f 77 0a 09 |.BEQ.rf_endrow..|
000028d0 53 54 52 42 09 72 30 2c 20 5b 72 31 30 5d 2c 20 |STRB.r0, [r10], |
000028e0 23 31 0a 09 53 55 42 53 09 72 31 31 2c 20 72 31 |#1..SUBS.r11, r1|
000028f0 31 2c 20 23 31 0a 09 42 45 51 09 72 66 5f 65 6e |1, #1..BEQ.rf_en|
00002900 64 72 6f 77 0a 09 53 54 52 42 09 72 30 2c 20 5b |drow..STRB.r0, [|
00002910 72 31 30 5d 2c 20 23 31 0a 72 66 5f 65 6e 64 72 |r10], #1.rf_endr|
00002920 6f 77 0a 09 41 44 44 09 72 35 2c 20 72 35 2c 20 |ow..ADD.r5, r5, |
00002930 23 33 32 30 0a 09 53 55 42 53 09 68 5f 72 2c 20 |#320..SUBS.h_r, |
00002940 68 5f 72 2c 20 23 31 0a 09 42 47 54 09 72 66 5f |h_r, #1..BGT.rf_|
00002950 6e 65 78 74 72 6f 77 0a 0a 72 66 5f 65 78 69 74 |nextrow..rf_exit|
00002960 09 4c 44 4d 46 44 09 73 70 21 2c 20 7b 72 34 2d |.LDMFD.sp!, {r4-|
00002970 72 39 2c 20 73 6c 2c 20 66 70 2c 20 70 63 7d 5e |r9, sl, fp, pc}^|
00002980 0a 0a 0a 0a 3b 20 65 72 61 73 65 5f 62 72 6f 6c |....; erase_brol|
00002990 6c 79 0a 3b 20 61 20 6c 65 61 66 20 41 50 43 53 |ly.; a leaf APCS|
000029a0 20 66 75 6e 63 74 69 6f 6e 0a 3b 0a 3b 20 43 20 | function.;.; C |
000029b0 70 72 6f 74 6f 74 79 70 65 3a 0a 3b 20 76 6f 69 |prototype:.; voi|
000029c0 64 20 65 72 61 73 65 5f 62 72 6f 6c 6c 79 28 76 |d erase_brolly(v|
000029d0 6f 69 64 20 2a 73 70 72 2c 20 69 6e 74 20 78 2c |oid *spr, int x,|
000029e0 20 69 6e 74 20 79 29 3b 0a 3b 0a 3b 20 70 6c 6f | int y);.;.; plo|
000029f0 74 20 61 20 62 6c 61 6e 6b 20 72 65 63 74 61 6e |t a blank rectan|
00002a00 67 6c 65 20 6f 66 20 73 70 72 69 74 65 20 64 69 |gle of sprite di|
00002a10 6d 65 6e 73 69 6f 6e 73 20 61 74 20 78 2c 79 0a |mensions at x,y.|
00002a20 3b 20 61 73 73 75 6d 70 74 69 6f 6e 73 20 61 73 |; assumptions as|
00002a30 20 66 6f 72 20 70 6c 6f 74 5f 62 72 6f 6c 6c 79 | for plot_brolly|
00002a40 0a 3b 0a 3b 20 6e 62 20 77 72 69 74 74 65 6e 20 |.;.; nb written |
00002a50 69 6e 20 72 65 73 70 6f 6e 73 65 20 74 6f 20 64 |in response to d|
00002a60 69 73 63 6f 76 65 72 79 20 74 68 61 74 20 61 20 |iscovery that a |
00002a70 66 75 6c 6c 20 73 63 72 65 65 6e 20 63 6c 65 61 |full screen clea|
00002a80 72 20 77 61 73 20 75 73 69 6e 67 20 6e 65 61 72 |r was using near|
00002a90 6c 79 0a 3b 20 36 30 25 20 6f 66 20 66 72 61 6d |ly.; 60% of fram|
00002aa0 65 20 74 69 6d 65 20 2d 20 75 73 65 20 6f 66 20 |e time - use of |
00002ab0 74 68 69 73 20 66 75 6e 63 74 69 6f 6e 20 74 6f |this function to|
00002ac0 20 65 72 61 73 65 20 62 72 6f 6c 6c 79 20 26 20 | erase brolly & |
00002ad0 68 61 6e 64 20 72 65 64 75 63 65 73 20 74 68 69 |hand reduces thi|
00002ae0 73 20 74 6f 20 31 36 25 0a 3b 20 64 6f 75 62 6c |s to 16%.; doubl|
00002af0 69 6e 67 20 67 61 6d 65 20 73 70 65 65 64 0a 3b |ing game speed.;|
00002b00 0a 09 45 58 50 4f 52 54 09 65 72 61 73 65 5f 62 |..EXPORT.erase_b|
00002b10 72 6f 6c 6c 79 0a 0a 65 73 6e 73 74 61 09 44 43 |rolly..esnsta.DC|
00002b20 42 09 22 65 72 61 73 65 5f 62 72 6f 6c 6c 79 22 |B."erase_brolly"|
00002b30 2c 20 30 0a 09 41 4c 49 47 4e 0a 65 73 6e 65 6e |, 0..ALIGN.esnen|
00002b40 64 09 44 43 44 09 26 66 66 30 30 30 30 30 30 20 |d.DCD.&ff000000 |
00002b50 2b 20 65 73 6e 65 6e 64 20 2d 20 65 73 6e 73 74 |+ esnend - esnst|
00002b60 61 0a 0a 65 72 61 73 65 5f 62 72 6f 6c 6c 79 0a |a..erase_brolly.|
00002b70 0a 09 53 54 4d 46 44 09 73 70 21 2c 20 7b 72 34 |..STMFD.sp!, {r4|
00002b80 2d 72 39 2c 20 73 6c 2c 20 66 70 2c 20 6c 72 7d |-r9, sl, fp, lr}|
00002b90 0a 09 41 44 52 4c 09 72 34 2c 20 76 62 6c 73 0a |..ADRL.r4, vbls.|
00002ba0 09 4c 44 4d 49 41 09 72 34 2c 20 7b 72 34 2d 72 |.LDMIA.r4, {r4-r|
00002bb0 39 7d 0a 09 4c 44 52 09 72 34 2c 20 5b 72 62 61 |9}..LDR.r4, [rba|
00002bc0 6e 6b 5d 0a 09 53 55 42 09 72 34 2c 20 72 34 2c |nk]..SUB.r4, r4,|
00002bd0 20 23 31 0a 09 4c 44 52 09 72 35 2c 20 5b 72 73 | #1..LDR.r5, [rs|
00002be0 63 72 73 74 2c 20 72 34 2c 20 4c 53 4c 20 23 32 |crst, r4, LSL #2|
00002bf0 5d 09 3b 20 73 63 72 65 65 6e 20 62 61 73 65 20 |].; screen base |
00002c00 61 64 64 72 20 66 6f 72 20 56 44 55 20 6f 75 74 |addr for VDU out|
00002c10 70 75 74 0a 09 4c 44 52 09 72 6f 78 2c 20 5b 72 |put..LDR.rox, [r|
00002c20 6f 78 5d 0a 09 4c 44 52 09 72 6f 79 2c 20 5b 72 |ox]..LDR.roy, [r|
00002c30 6f 79 5d 0a 09 4c 44 52 09 72 6c 78 2c 20 5b 72 |oy]..LDR.rlx, [r|
00002c40 6c 78 5d 0a 09 4c 44 52 09 72 6c 79 2c 20 5b 72 |lx]..LDR.rly, [r|
00002c50 6c 79 5d 0a 09 41 44 44 09 72 31 30 2c 20 78 5f |ly]..ADD.r10, x_|
00002c60 65 2c 20 72 6f 78 0a 09 52 53 42 09 72 31 31 2c |e, rox..RSB.r11,|
00002c70 20 79 5f 65 2c 20 72 6f 79 0a 09 4d 4f 56 53 09 | y_e, roy..MOVS.|
00002c80 72 31 30 2c 20 72 31 30 2c 20 41 53 52 20 72 6c |r10, r10, ASR rl|
00002c90 78 09 09 3b 20 78 20 70 69 78 65 6c 20 63 6f 6f |x..; x pixel coo|
00002ca0 72 64 20 72 65 6c 20 6c 65 66 74 20 73 63 72 65 |rd rel left scre|
00002cb0 65 6e 20 7d 20 6f 66 20 62 6f 74 74 6f 6d 20 6c |en } of bottom l|
00002cc0 65 66 74 0a 09 4d 4f 56 09 72 31 31 2c 20 72 31 |eft..MOV.r11, r1|
00002cd0 31 2c 20 41 53 52 20 72 6c 79 09 09 3b 20 79 20 |1, ASR rly..; y |
00002ce0 70 69 78 65 6c 20 63 6f 6f 72 64 20 72 65 6c 20 |pixel coord rel |
00002cf0 74 6f 70 20 73 63 72 65 65 6e 20 20 7d 20 6f 66 |top screen } of|
00002d00 20 6f 62 6a 65 63 74 0a 09 4d 4f 56 4d 49 09 72 | object..MOVMI.r|
00002d10 31 30 2c 20 23 30 09 09 09 09 3b 20 62 6f 64 67 |10, #0....; bodg|
00002d20 65 20 69 66 20 70 61 72 74 6c 79 20 6f 66 66 20 |e if partly off |
00002d30 73 63 72 65 65 6e 20 6c 65 66 74 0a 09 4c 44 52 |screen left..LDR|
00002d40 09 72 31 32 2c 20 5b 73 70 72 5f 65 2c 20 23 77 |.r12, [spr_e, #w|
00002d50 69 64 74 68 5d 0a 09 41 44 44 09 72 31 32 2c 20 |idth]..ADD.r12, |
00002d60 72 31 32 2c 20 23 31 09 09 09 3b 20 77 69 64 74 |r12, #1...; widt|
00002d70 68 20 69 6e 20 77 6f 72 64 73 0a 09 41 44 44 09 |h in words..ADD.|
00002d80 72 31 34 2c 20 72 31 30 2c 20 72 31 32 2c 20 41 |r14, r10, r12, A|
00002d90 53 4c 20 23 33 0a 09 43 4d 50 09 72 31 34 2c 20 |SL #3..CMP.r14, |
00002da0 23 36 34 30 0a 09 4d 4f 56 47 54 09 72 31 34 2c |#640..MOVGT.r14,|
00002db0 20 72 31 32 2c 20 41 53 4c 20 23 33 0a 09 52 53 | r12, ASL #3..RS|
00002dc0 42 47 54 09 72 31 30 2c 20 72 31 34 2c 20 23 36 |BGT.r10, r14, #6|
00002dd0 34 30 09 09 09 3b 20 62 6f 64 67 65 20 69 66 20 |40...; bodge if |
00002de0 70 61 72 74 6c 79 20 6f 66 66 20 73 63 72 65 65 |partly off scree|
00002df0 6e 20 72 69 67 68 74 0a 09 4c 44 52 09 72 31 34 |n right..LDR.r14|
00002e00 2c 20 5b 73 70 72 5f 65 2c 20 23 68 65 69 67 68 |, [spr_e, #heigh|
00002e10 74 5d 0a 09 53 55 42 09 72 31 31 2c 20 72 31 31 |t]..SUB.r11, r11|
00002e20 2c 20 72 31 34 0a 09 41 44 44 09 72 31 31 2c 20 |, r14..ADD.r11, |
00002e30 72 31 31 2c 20 72 31 31 2c 20 41 53 4c 20 23 32 |r11, r11, ASL #2|
00002e40 0a 09 41 44 44 09 72 35 2c 20 72 35 2c 20 72 31 |..ADD.r5, r5, r1|
00002e50 31 2c 20 41 53 4c 20 23 36 0a 09 54 53 54 09 72 |1, ASL #6..TST.r|
00002e60 31 30 2c 20 23 37 0a 09 41 44 44 4e 45 09 72 31 |10, #7..ADDNE.r1|
00002e70 32 2c 20 72 31 32 2c 20 23 31 0a 09 42 49 43 09 |2, r12, #1..BIC.|
00002e80 72 31 30 2c 20 72 31 30 2c 20 23 37 0a 09 41 44 |r10, r10, #7..AD|
00002e90 44 09 72 35 2c 20 72 35 2c 20 72 31 30 2c 20 41 |D.r5, r5, r10, A|
00002ea0 53 52 20 23 31 09 09 3b 20 73 63 72 65 65 6e 20 |SR #1..; screen |
00002eb0 74 6f 70 20 6c 65 66 74 20 6f 66 20 73 70 72 69 |top left of spri|
00002ec0 74 65 0a 09 41 44 44 09 72 36 2c 20 72 31 34 2c |te..ADD.r6, r14,|
00002ed0 20 23 31 09 09 09 3b 20 6e 75 6d 62 65 72 20 6f | #1...; number o|
00002ee0 66 20 72 6f 77 73 20 74 6f 20 70 6c 6f 74 0a 09 |f rows to plot..|
00002ef0 41 4e 44 09 72 31 34 2c 20 72 31 32 2c 20 23 33 |AND.r14, r12, #3|
00002f00 0a 09 4d 4f 56 53 09 72 31 32 2c 20 72 31 32 2c |..MOVS.r12, r12,|
00002f10 20 41 53 52 20 23 32 0a 09 4d 4f 56 09 72 30 2c | ASR #2..MOV.r0,|
00002f20 20 23 30 0a 09 42 45 51 09 65 73 5f 6e 61 72 72 | #0..BEQ.es_narr|
00002f30 6f 77 0a 09 4d 4f 56 09 72 31 2c 20 72 30 0a 09 |ow..MOV.r1, r0..|
00002f40 4d 4f 56 09 72 32 2c 20 72 30 0a 09 4d 4f 56 09 |MOV.r2, r0..MOV.|
00002f50 72 33 2c 20 72 30 0a 65 73 5f 6e 65 78 74 72 6f |r3, r0.es_nextro|
00002f60 77 0a 09 4d 4f 56 09 72 31 30 2c 20 72 35 0a 09 |w..MOV.r10, r5..|
00002f70 4d 4f 56 09 72 31 31 2c 20 72 31 32 0a 65 73 5f |MOV.r11, r12.es_|
00002f80 6e 65 78 74 63 6f 6c 0a 09 53 54 52 09 72 32 2c |nextcol..STR.r2,|
00002f90 20 5b 72 31 30 5d 2c 20 23 34 0a 09 53 54 4d 49 | [r10], #4..STMI|
00002fa0 41 09 72 31 30 21 2c 20 7b 72 30 2d 72 33 7d 0a |A.r10!, {r0-r3}.|
00002fb0 09 53 55 42 53 09 72 31 31 2c 20 72 31 31 2c 20 |.SUBS.r11, r11, |
00002fc0 23 31 0a 09 42 4c 45 09 65 73 5f 65 6e 64 6d 75 |#1..BLE.es_endmu|
00002fd0 6c 74 63 6f 6c 0a 09 53 54 52 09 72 32 2c 20 5b |ltcol..STR.r2, [|
00002fe0 72 31 30 5d 2c 20 23 34 0a 09 53 54 4d 49 41 09 |r10], #4..STMIA.|
00002ff0 72 31 30 21 2c 20 7b 72 30 2d 72 33 7d 0a 09 53 |r10!, {r0-r3}..S|
00003000 55 42 53 09 72 31 31 2c 20 72 31 31 2c 20 23 31 |UBS.r11, r11, #1|
00003010 0a 09 42 4c 45 09 65 73 5f 65 6e 64 6d 75 6c 74 |..BLE.es_endmult|
00003020 63 6f 6c 0a 09 53 54 52 09 72 32 2c 20 5b 72 31 |col..STR.r2, [r1|
00003030 30 5d 2c 20 23 34 0a 09 53 54 4d 49 41 09 72 31 |0], #4..STMIA.r1|
00003040 30 21 2c 20 7b 72 30 2d 72 33 7d 0a 09 53 55 42 |0!, {r0-r3}..SUB|
00003050 53 09 72 31 31 2c 20 72 31 31 2c 20 23 31 0a 09 |S.r11, r11, #1..|
00003060 42 4c 45 09 65 73 5f 65 6e 64 6d 75 6c 74 63 6f |BLE.es_endmultco|
00003070 6c 0a 09 53 54 52 09 72 32 2c 20 5b 72 31 30 5d |l..STR.r2, [r10]|
00003080 2c 20 23 34 0a 09 53 54 4d 49 41 09 72 31 30 21 |, #4..STMIA.r10!|
00003090 2c 20 7b 72 30 2d 72 33 7d 0a 09 53 55 42 53 09 |, {r0-r3}..SUBS.|
000030a0 72 31 31 2c 20 72 31 31 2c 20 23 31 0a 09 42 47 |r11, r11, #1..BG|
000030b0 54 09 65 73 5f 6e 65 78 74 63 6f 6c 0a 65 73 5f |T.es_nextcol.es_|
000030c0 65 6e 64 6d 75 6c 74 63 6f 6c 0a 09 4d 4f 56 09 |endmultcol..MOV.|
000030d0 72 31 31 2c 20 72 31 34 0a 09 53 54 52 09 72 30 |r11, r14..STR.r0|
000030e0 2c 20 5b 72 31 30 5d 2c 20 23 34 0a 09 53 55 42 |, [r10], #4..SUB|
000030f0 53 09 72 31 31 2c 20 72 31 31 2c 20 23 31 0a 09 |S.r11, r11, #1..|
00003100 42 4c 45 09 65 73 5f 65 6e 64 63 6f 6c 0a 09 53 |BLE.es_endcol..S|
00003110 54 52 09 72 30 2c 20 5b 72 31 30 5d 2c 20 23 34 |TR.r0, [r10], #4|
00003120 0a 09 53 55 42 53 09 72 31 31 2c 20 72 31 31 2c |..SUBS.r11, r11,|
00003130 20 23 31 0a 09 42 4c 45 09 65 73 5f 65 6e 64 63 | #1..BLE.es_endc|
00003140 6f 6c 0a 09 53 54 52 09 72 30 2c 20 5b 72 31 30 |ol..STR.r0, [r10|
00003150 5d 2c 20 23 34 0a 09 53 55 42 53 09 72 31 31 2c |], #4..SUBS.r11,|
00003160 20 72 31 31 2c 20 23 31 0a 09 42 4c 45 09 65 73 | r11, #1..BLE.es|
00003170 5f 65 6e 64 63 6f 6c 0a 09 53 54 52 09 72 30 2c |_endcol..STR.r0,|
00003180 20 5b 72 31 30 5d 2c 20 23 34 0a 65 73 5f 65 6e | [r10], #4.es_en|
00003190 64 63 6f 6c 0a 09 41 44 44 09 72 35 2c 20 72 35 |dcol..ADD.r5, r5|
000031a0 2c 20 23 33 32 30 0a 09 53 55 42 53 09 72 36 2c |, #320..SUBS.r6,|
000031b0 20 72 36 2c 20 23 31 0a 09 42 47 54 09 65 73 5f | r6, #1..BGT.es_|
000031c0 6e 65 78 74 72 6f 77 0a 09 42 09 65 73 5f 65 78 |nextrow..B.es_ex|
000031d0 69 74 0a 65 73 5f 6e 61 72 72 6f 77 0a 65 73 5f |it.es_narrow.es_|
000031e0 6e 6e 65 78 74 72 6f 77 0a 09 4d 4f 56 09 72 31 |nnextrow..MOV.r1|
000031f0 30 2c 20 72 35 0a 09 4d 4f 56 09 72 31 31 2c 20 |0, r5..MOV.r11, |
00003200 72 31 34 0a 09 53 54 52 09 72 30 2c 20 5b 72 31 |r14..STR.r0, [r1|
00003210 30 5d 2c 20 23 34 0a 09 53 55 42 53 09 72 31 31 |0], #4..SUBS.r11|
00003220 2c 20 72 31 31 2c 20 23 31 0a 09 42 4c 45 09 65 |, r11, #1..BLE.e|
00003230 73 5f 6e 65 6e 64 63 6f 6c 0a 09 53 54 52 09 72 |s_nendcol..STR.r|
00003240 30 2c 20 5b 72 31 30 5d 2c 20 23 34 0a 09 53 55 |0, [r10], #4..SU|
00003250 42 53 09 72 31 31 2c 20 72 31 31 2c 20 23 31 0a |BS.r11, r11, #1.|
00003260 09 42 4c 45 09 65 73 5f 6e 65 6e 64 63 6f 6c 0a |.BLE.es_nendcol.|
00003270 09 53 54 52 09 72 30 2c 20 5b 72 31 30 5d 2c 20 |.STR.r0, [r10], |
00003280 23 34 0a 09 53 55 42 53 09 72 31 31 2c 20 72 31 |#4..SUBS.r11, r1|
00003290 31 2c 20 23 31 0a 09 42 4c 45 09 65 73 5f 6e 65 |1, #1..BLE.es_ne|
000032a0 6e 64 63 6f 6c 0a 09 53 54 52 09 72 30 2c 20 5b |ndcol..STR.r0, [|
000032b0 72 31 30 5d 2c 20 23 34 0a 65 73 5f 6e 65 6e 64 |r10], #4.es_nend|
000032c0 63 6f 6c 0a 09 41 44 44 09 72 35 2c 20 72 35 2c |col..ADD.r5, r5,|
000032d0 20 23 33 32 30 0a 09 53 55 42 53 09 72 36 2c 20 | #320..SUBS.r6, |
000032e0 72 36 2c 20 23 31 0a 09 42 47 54 09 65 73 5f 6e |r6, #1..BGT.es_n|
000032f0 6e 65 78 74 72 6f 77 0a 0a 65 73 5f 65 78 69 74 |nextrow..es_exit|
00003300 09 4c 44 4d 46 44 09 73 70 21 2c 20 7b 72 34 2d |.LDMFD.sp!, {r4-|
00003310 72 39 2c 20 73 6c 2c 20 66 70 2c 20 70 63 7d 5e |r9, sl, fp, pc}^|
00003320 0a 0a 0a 0a 3b 20 65 72 61 73 65 5f 68 61 6e 64 |....; erase_hand|
00003330 0a 3b 20 61 20 6c 65 61 66 20 41 50 43 53 20 66 |.; a leaf APCS f|
00003340 75 6e 63 74 69 6f 6e 0a 3b 0a 3b 20 43 20 70 72 |unction.;.; C pr|
00003350 6f 74 6f 74 79 70 65 3a 0a 3b 20 76 6f 69 64 20 |ototype:.; void |
00003360 65 72 61 73 65 5f 68 61 6e 64 28 76 6f 69 64 20 |erase_hand(void |
00003370 2a 61 72 65 61 2c 20 76 6f 69 64 20 2a 73 70 72 |*area, void *spr|
00003380 2c 20 69 6e 74 20 78 2c 20 69 6e 74 20 79 29 3b |, int x, int y);|
00003390 0a 3b 0a 3b 20 6e 62 20 20 61 73 73 75 6d 65 73 |.;.; nb assumes|
000033a0 20 66 69 74 73 20 6f 6e 20 73 63 72 65 65 6e 20 | fits on screen |
000033b0 26 20 6e 6f 20 63 6c 69 70 70 69 6e 67 20 6e 65 |& no clipping ne|
000033c0 65 64 65 64 0a 3b 20 6e 62 32 20 61 6c 73 6f 20 |eded.; nb2 also |
000033d0 61 73 73 75 6d 65 73 20 73 70 72 69 74 65 20 69 |assumes sprite i|
000033e0 73 20 6d 75 6c 74 69 70 6c 65 20 6f 66 20 38 20 |s multiple of 8 |
000033f0 70 69 78 65 6c 73 20 77 69 64 65 2c 20 69 73 20 |pixels wide, is |
00003400 34 62 70 70 20 26 20 73 63 72 65 65 6e 20 6d 6f |4bpp & screen mo|
00003410 64 65 20 69 73 20 36 34 30 20 70 69 78 65 6c 73 |de is 640 pixels|
00003420 20 77 69 64 65 0a 3b 20 69 67 6e 6f 72 65 20 73 | wide.; ignore s|
00003430 70 72 69 74 65 20 6d 61 73 6b 20 69 66 20 69 74 |prite mask if it|
00003440 20 68 61 73 20 6f 6e 65 2c 20 62 75 74 20 74 72 | has one, but tr|
00003450 65 61 74 20 63 6f 6c 6f 75 72 20 30 20 70 69 78 |eat colour 0 pix|
00003460 65 6c 73 20 61 73 20 74 72 61 6e 73 70 61 72 65 |els as transpare|
00003470 6e 74 3b 0a 3b 20 61 6c 73 6f 2c 20 74 72 65 61 |nt;.; also, trea|
00003480 74 20 73 63 72 65 65 6e 20 70 69 78 65 6c 73 20 |t screen pixels |
00003490 6f 66 20 63 6f 6c 6f 75 72 73 20 38 20 74 6f 20 |of colours 8 to |
000034a0 31 35 20 61 73 20 6c 79 69 6e 67 20 69 6e 66 72 |15 as lying infr|
000034b0 6f 6e 74 20 6f 66 20 68 61 6e 64 20 73 70 72 69 |ont of hand spri|
000034c0 74 65 0a 3b 0a 09 45 58 50 4f 52 54 09 65 72 61 |te.;..EXPORT.era|
000034d0 73 65 5f 68 61 6e 64 0a 0a 65 68 6e 73 74 61 09 |se_hand..ehnsta.|
000034e0 44 43 42 09 22 65 72 61 73 65 5f 68 61 6e 64 22 |DCB."erase_hand"|
000034f0 2c 20 30 0a 09 41 4c 49 47 4e 0a 65 68 6e 65 6e |, 0..ALIGN.ehnen|
00003500 64 09 44 43 44 09 26 66 66 30 30 30 30 30 30 20 |d.DCD.&ff000000 |
00003510 2b 20 65 68 6e 65 6e 64 20 2d 20 65 68 6e 73 74 |+ ehnend - ehnst|
00003520 61 0a 0a 65 68 73 70 09 44 43 44 09 30 0a 0a 65 |a..ehsp.DCD.0..e|
00003530 72 61 73 65 5f 68 61 6e 64 0a 0a 09 53 54 4d 46 |rase_hand...STMF|
00003540 44 09 73 70 21 2c 20 7b 72 34 2d 72 39 2c 20 73 |D.sp!, {r4-r9, s|
00003550 6c 2c 20 66 70 2c 20 6c 72 7d 0a 09 53 54 52 09 |l, fp, lr}..STR.|
00003560 73 70 2c 20 65 68 73 70 0a 09 41 44 52 4c 09 72 |sp, ehsp..ADRL.r|
00003570 34 2c 20 76 62 6c 73 0a 09 4c 44 4d 49 41 09 72 |4, vbls..LDMIA.r|
00003580 34 2c 20 7b 72 34 2d 72 39 7d 0a 09 4c 44 52 09 |4, {r4-r9}..LDR.|
00003590 72 34 2c 20 5b 72 62 61 6e 6b 5d 0a 09 53 55 42 |r4, [rbank]..SUB|
000035a0 09 72 34 2c 20 72 34 2c 20 23 31 0a 09 4c 44 52 |.r4, r4, #1..LDR|
000035b0 09 72 35 2c 20 5b 72 73 63 72 73 74 2c 20 72 34 |.r5, [rscrst, r4|
000035c0 2c 20 4c 53 4c 20 23 32 5d 09 3b 20 73 63 72 65 |, LSL #2].; scre|
000035d0 65 6e 20 62 61 73 65 20 61 64 64 72 20 66 6f 72 |en base addr for|
000035e0 20 56 44 55 20 6f 75 74 70 75 74 0a 09 4c 44 52 | VDU output..LDR|
000035f0 09 72 6f 78 2c 20 5b 72 6f 78 5d 0a 09 4c 44 52 |.rox, [rox]..LDR|
00003600 09 72 6f 79 2c 20 5b 72 6f 79 5d 0a 09 4c 44 52 |.roy, [roy]..LDR|
00003610 09 72 6c 78 2c 20 5b 72 6c 78 5d 0a 09 4c 44 52 |.rlx, [rlx]..LDR|
00003620 09 72 6c 79 2c 20 5b 72 6c 79 5d 0a 09 41 44 44 |.rly, [rly]..ADD|
00003630 09 72 31 30 2c 20 78 2c 20 72 6f 78 0a 09 52 53 |.r10, x, rox..RS|
00003640 42 09 72 31 31 2c 20 79 2c 20 72 6f 79 0a 09 4d |B.r11, y, roy..M|
00003650 4f 56 09 72 31 30 2c 20 72 31 30 2c 20 41 53 52 |OV.r10, r10, ASR|
00003660 20 72 6c 78 09 09 3b 20 78 20 70 69 78 65 6c 20 | rlx..; x pixel |
00003670 63 6f 6f 72 64 20 72 65 6c 20 6c 65 66 74 20 73 |coord rel left s|
00003680 63 72 65 65 6e 20 7d 20 6f 66 20 62 6f 74 74 6f |creen } of botto|
00003690 6d 20 6c 65 66 74 0a 09 4d 4f 56 09 72 31 31 2c |m left..MOV.r11,|
000036a0 20 72 31 31 2c 20 41 53 52 20 72 6c 79 09 09 3b | r11, ASR rly..;|
000036b0 20 79 20 70 69 78 65 6c 20 63 6f 6f 72 64 20 72 | y pixel coord r|
000036c0 65 6c 20 74 6f 70 20 73 63 72 65 65 6e 20 20 7d |el top screen }|
000036d0 20 6f 66 20 6f 62 6a 65 63 74 0a 09 43 4d 50 09 | of object..CMP.|
000036e0 72 31 30 2c 20 23 32 35 09 09 09 3b 20 63 6f 6e |r10, #25...; con|
000036f0 73 74 61 69 6e 20 74 6f 20 62 65 20 6e 6f 74 20 |stain to be not |
00003700 6f 66 66 20 6c 65 66 74 20 73 69 64 65 20 73 63 |off left side sc|
00003710 72 65 65 6e 0a 09 4d 4f 56 4c 54 09 72 31 30 2c |reen..MOVLT.r10,|
00003720 20 23 32 35 0a 09 4c 44 52 09 72 31 32 2c 20 5b | #25..LDR.r12, [|
00003730 73 70 72 2c 20 23 77 69 64 74 68 5d 0a 09 41 44 |spr, #width]..AD|
00003740 44 09 72 31 32 2c 20 72 31 32 2c 20 23 31 09 09 |D.r12, r12, #1..|
00003750 09 3b 20 77 69 64 74 68 20 69 6e 20 77 6f 72 64 |.; width in word|
00003760 73 0a 09 41 44 44 09 72 31 34 2c 20 72 31 30 2c |s..ADD.r14, r10,|
00003770 20 72 31 32 2c 20 41 53 4c 20 23 33 0a 09 43 4d | r12, ASL #3..CM|
00003780 50 09 72 31 34 2c 20 23 36 31 32 0a 09 4d 4f 56 |P.r14, #612..MOV|
00003790 47 54 09 72 31 34 2c 20 72 31 32 2c 20 41 53 4c |GT.r14, r12, ASL|
000037a0 20 23 33 09 09 3b 20 63 6f 6e 73 74 72 61 69 6e | #3..; constrain|
000037b0 20 74 6f 20 62 65 20 6e 6f 74 20 6f 66 66 20 72 | to be not off r|
000037c0 69 67 68 74 20 73 69 64 65 20 73 63 72 65 65 6e |ight side screen|
000037d0 0a 09 52 53 42 47 54 09 72 31 30 2c 20 72 31 34 |..RSBGT.r10, r14|
000037e0 2c 20 23 36 31 32 0a 09 4c 44 52 09 72 31 34 2c |, #612..LDR.r14,|
000037f0 20 5b 73 70 72 2c 20 23 68 65 69 67 68 74 5d 0a | [spr, #height].|
00003800 09 53 55 42 09 72 31 31 2c 20 72 31 31 2c 20 72 |.SUB.r11, r11, r|
00003810 31 34 0a 09 41 44 44 09 72 31 31 2c 20 72 31 31 |14..ADD.r11, r11|
00003820 2c 20 72 31 31 2c 20 41 53 4c 20 23 32 0a 09 41 |, r11, ASL #2..A|
00003830 44 44 09 72 35 2c 20 72 35 2c 20 72 31 31 2c 20 |DD.r5, r5, r11, |
00003840 41 53 4c 20 23 36 0a 09 41 4e 44 09 72 30 2c 20 |ASL #6..AND.r0, |
00003850 72 31 30 2c 20 23 37 0a 09 42 49 43 09 72 31 30 |r10, #7..BIC.r10|
00003860 2c 20 72 31 30 2c 20 23 37 0a 09 41 44 44 09 72 |, r10, #7..ADD.r|
00003870 35 2c 20 72 35 2c 20 72 31 30 2c 20 41 53 52 20 |5, r5, r10, ASR |
00003880 23 31 09 09 3b 20 73 63 72 65 65 6e 20 74 6f 70 |#1..; screen top|
00003890 20 6c 65 66 74 20 6f 66 20 68 61 6e 64 0a 09 41 | left of hand..A|
000038a0 44 44 09 72 36 2c 20 72 31 34 2c 20 23 31 09 09 |DD.r6, r14, #1..|
000038b0 09 3b 20 6e 75 6d 62 65 72 20 6f 66 20 72 6f 77 |.; number of row|
000038c0 73 20 74 6f 20 70 6c 6f 74 0a 09 4d 4f 56 09 72 |s to plot..MOV.r|
000038d0 30 2c 20 72 30 2c 20 41 53 4c 20 23 32 0a 09 52 |0, r0, ASL #2..R|
000038e0 53 42 09 72 31 2c 20 72 30 2c 20 23 33 32 0a 09 |SB.r1, r0, #32..|
000038f0 4d 4f 56 09 72 31 34 2c 20 23 26 38 38 0a 09 4f |MOV.r14, #&88..O|
00003900 52 52 09 72 31 34 2c 20 72 31 34 2c 20 72 31 34 |RR.r14, r14, r14|
00003910 2c 20 4c 53 4c 20 23 38 0a 09 4f 52 52 09 72 31 |, LSL #8..ORR.r1|
00003920 34 2c 20 72 31 34 2c 20 72 31 34 2c 20 4c 53 4c |4, r14, r14, LSL|
00003930 20 23 31 36 09 09 3b 20 6d 61 73 6b 69 6e 67 20 | #16..; masking |
00003940 63 6f 6e 73 74 61 6e 74 20 26 38 38 38 38 38 38 |constant &888888|
00003950 38 38 0a 65 68 5f 6e 65 78 74 72 6f 77 0a 09 4d |88.eh_nextrow..M|
00003960 4f 56 09 72 31 30 2c 20 72 35 09 09 09 09 3b 20 |OV.r10, r5....; |
00003970 73 74 61 72 74 20 6f 66 20 63 75 72 72 65 6e 74 |start of current|
00003980 20 72 6f 77 20 6f 6e 20 73 63 72 65 65 6e 0a 09 | row on screen..|
00003990 4d 4f 56 09 72 31 31 2c 20 72 31 32 09 09 09 3b |MOV.r11, r12...;|
000039a0 20 6e 75 6d 62 65 72 20 6f 66 20 63 6f 6c 73 20 | number of cols |
000039b0 74 6f 20 70 6c 6f 74 0a 65 68 5f 6e 65 78 74 63 |to plot.eh_nextc|
000039c0 6f 6c 0a 09 4c 44 52 09 72 38 2c 20 5b 72 31 30 |ol..LDR.r8, [r10|
000039d0 5d 09 09 09 3b 20 73 63 72 65 65 6e 20 64 61 74 |]...; screen dat|
000039e0 61 0a 09 41 4e 44 09 72 39 2c 20 72 38 2c 20 72 |a..AND.r9, r8, r|
000039f0 31 34 0a 09 4f 52 52 09 72 39 2c 20 72 39 2c 20 |14..ORR.r9, r9, |
00003a00 72 39 2c 20 4c 53 52 20 23 31 0a 09 4f 52 52 09 |r9, LSR #1..ORR.|
00003a10 72 39 2c 20 72 39 2c 20 72 39 2c 20 4c 53 52 20 |r9, r9, r9, LSR |
00003a20 23 32 0a 09 41 4e 44 09 72 38 2c 20 72 38 2c 20 |#2..AND.r8, r8, |
00003a30 72 39 0a 09 53 54 52 09 72 38 2c 20 5b 72 31 30 |r9..STR.r8, [r10|
00003a40 5d 2c 20 23 34 0a 09 53 55 42 53 09 72 31 31 2c |], #4..SUBS.r11,|
00003a50 20 72 31 31 2c 20 23 31 0a 09 42 4c 45 09 65 68 | r11, #1..BLE.eh|
00003a60 5f 65 6e 64 63 6f 6c 0a 09 4c 44 52 09 72 38 2c |_endcol..LDR.r8,|
00003a70 20 5b 72 31 30 5d 09 09 09 3b 20 73 63 72 65 65 | [r10]...; scree|
00003a80 6e 20 64 61 74 61 0a 09 41 4e 44 09 72 39 2c 20 |n data..AND.r9, |
00003a90 72 38 2c 20 72 31 34 0a 09 4f 52 52 09 72 39 2c |r8, r14..ORR.r9,|
00003aa0 20 72 39 2c 20 72 39 2c 20 4c 53 52 20 23 31 0a | r9, r9, LSR #1.|
00003ab0 09 4f 52 52 09 72 39 2c 20 72 39 2c 20 72 39 2c |.ORR.r9, r9, r9,|
00003ac0 20 4c 53 52 20 23 32 0a 09 41 4e 44 09 72 38 2c | LSR #2..AND.r8,|
00003ad0 20 72 38 2c 20 72 39 0a 09 53 54 52 09 72 38 2c | r8, r9..STR.r8,|
00003ae0 20 5b 72 31 30 5d 2c 20 23 34 0a 09 53 55 42 53 | [r10], #4..SUBS|
00003af0 09 72 31 31 2c 20 72 31 31 2c 20 23 31 0a 09 42 |.r11, r11, #1..B|
00003b00 4c 45 09 65 68 5f 65 6e 64 63 6f 6c 0a 09 4c 44 |LE.eh_endcol..LD|
00003b10 52 09 72 38 2c 20 5b 72 31 30 5d 09 09 09 3b 20 |R.r8, [r10]...; |
00003b20 73 63 72 65 65 6e 20 64 61 74 61 0a 09 41 4e 44 |screen data..AND|
00003b30 09 72 39 2c 20 72 38 2c 20 72 31 34 0a 09 4f 52 |.r9, r8, r14..OR|
00003b40 52 09 72 39 2c 20 72 39 2c 20 72 39 2c 20 4c 53 |R.r9, r9, r9, LS|
00003b50 52 20 23 31 0a 09 4f 52 52 09 72 39 2c 20 72 39 |R #1..ORR.r9, r9|
00003b60 2c 20 72 39 2c 20 4c 53 52 20 23 32 0a 09 41 4e |, r9, LSR #2..AN|
00003b70 44 09 72 38 2c 20 72 38 2c 20 72 39 0a 09 53 54 |D.r8, r8, r9..ST|
00003b80 52 09 72 38 2c 20 5b 72 31 30 5d 2c 20 23 34 0a |R.r8, [r10], #4.|
00003b90 09 53 55 42 53 09 72 31 31 2c 20 72 31 31 2c 20 |.SUBS.r11, r11, |
00003ba0 23 31 0a 09 42 4c 45 09 65 68 5f 65 6e 64 63 6f |#1..BLE.eh_endco|
00003bb0 6c 0a 09 4c 44 52 09 72 38 2c 20 5b 72 31 30 5d |l..LDR.r8, [r10]|
00003bc0 09 09 09 3b 20 73 63 72 65 65 6e 20 64 61 74 61 |...; screen data|
00003bd0 0a 09 41 4e 44 09 72 39 2c 20 72 38 2c 20 72 31 |..AND.r9, r8, r1|
00003be0 34 0a 09 4f 52 52 09 72 39 2c 20 72 39 2c 20 72 |4..ORR.r9, r9, r|
00003bf0 39 2c 20 4c 53 52 20 23 31 0a 09 4f 52 52 09 72 |9, LSR #1..ORR.r|
00003c00 39 2c 20 72 39 2c 20 72 39 2c 20 4c 53 52 20 23 |9, r9, r9, LSR #|
00003c10 32 0a 09 41 4e 44 09 72 38 2c 20 72 38 2c 20 72 |2..AND.r8, r8, r|
00003c20 39 0a 09 53 54 52 09 72 38 2c 20 5b 72 31 30 5d |9..STR.r8, [r10]|
00003c30 2c 20 23 34 0a 09 53 55 42 53 09 72 31 31 2c 20 |, #4..SUBS.r11, |
00003c40 72 31 31 2c 20 23 31 0a 09 42 47 54 09 65 68 5f |r11, #1..BGT.eh_|
00003c50 6e 65 78 74 63 6f 6c 0a 65 68 5f 65 6e 64 63 6f |nextcol.eh_endco|
00003c60 6c 0a 09 43 4d 50 09 72 30 2c 20 23 30 0a 09 4c |l..CMP.r0, #0..L|
00003c70 44 52 4e 45 09 72 38 2c 20 5b 72 31 30 5d 09 09 |DRNE.r8, [r10]..|
00003c80 09 3b 20 73 63 72 65 65 6e 20 64 61 74 61 0a 09 |.; screen data..|
00003c90 41 4e 44 4e 45 09 72 39 2c 20 72 38 2c 20 72 31 |ANDNE.r9, r8, r1|
00003ca0 34 0a 09 4f 52 52 4e 45 09 72 39 2c 20 72 39 2c |4..ORRNE.r9, r9,|
00003cb0 20 72 39 2c 20 4c 53 52 20 23 31 0a 09 4f 52 52 | r9, LSR #1..ORR|
00003cc0 4e 45 09 72 39 2c 20 72 39 2c 20 72 39 2c 20 4c |NE.r9, r9, r9, L|
00003cd0 53 52 20 23 32 0a 09 41 4e 44 4e 45 09 72 38 2c |SR #2..ANDNE.r8,|
00003ce0 20 72 38 2c 20 72 39 0a 09 53 54 52 4e 45 09 72 | r8, r9..STRNE.r|
00003cf0 38 2c 20 5b 72 31 30 5d 2c 20 23 34 0a 09 41 44 |8, [r10], #4..AD|
00003d00 44 09 72 35 2c 20 72 35 2c 20 23 33 32 30 0a 09 |D.r5, r5, #320..|
00003d10 53 55 42 53 09 72 36 2c 20 72 36 2c 20 23 31 0a |SUBS.r6, r6, #1.|
00003d20 09 42 47 54 09 65 68 5f 6e 65 78 74 72 6f 77 0a |.BGT.eh_nextrow.|
00003d30 0a 65 68 5f 65 78 69 74 09 4c 44 52 09 73 70 2c |.eh_exit.LDR.sp,|
00003d40 20 65 68 73 70 0a 09 4c 44 4d 46 44 09 73 70 21 | ehsp..LDMFD.sp!|
00003d50 2c 20 7b 72 34 2d 72 39 2c 20 73 6c 2c 20 66 70 |, {r4-r9, sl, fp|
00003d60 2c 20 70 63 7d 5e 0a 0a 0a 0a 3b 20 65 72 61 73 |, pc}^....; eras|
00003d70 65 5f 6e 75 6d 62 65 72 0a 3b 20 61 20 6c 65 61 |e_number.; a lea|
00003d80 66 20 41 50 43 53 20 66 75 6e 63 74 69 6f 6e 0a |f APCS function.|
00003d90 3b 0a 3b 20 43 20 70 72 6f 74 6f 74 79 70 65 3a |;.; C prototype:|
00003da0 0a 3b 20 76 6f 69 64 20 65 72 61 73 65 5f 6e 75 |.; void erase_nu|
00003db0 6d 62 65 72 28 76 6f 69 64 20 2a 61 72 65 61 2c |mber(void *area,|
00003dc0 20 76 6f 69 64 20 2a 73 70 72 2c 20 69 6e 74 20 | void *spr, int |
00003dd0 78 2c 20 69 6e 74 20 79 29 3b 0a 3b 0a 3b 20 61 |x, int y);.;.; a|
00003de0 63 74 75 61 6c 6c 79 20 74 68 69 73 20 66 6e 20 |ctually this fn |
00003df0 70 6c 6f 74 73 20 61 20 33 32 20 78 20 68 74 20 |plots a 32 x ht |
00003e00 73 70 72 69 74 65 20 6f 6e 20 73 63 72 65 65 6e |sprite on screen|
00003e10 20 6f 76 65 72 20 74 68 65 20 6e 75 6d 62 65 72 | over the number|
00003e20 20 2d 20 73 70 72 69 74 65 0a 3b 20 73 68 6f 75 | - sprite.; shou|
00003e30 6c 64 20 62 65 20 73 65 74 20 75 70 20 62 65 66 |ld be set up bef|
00003e40 6f 72 65 20 74 6f 20 61 20 63 6f 70 79 20 6f 66 |ore to a copy of|
00003e50 20 74 68 65 20 62 61 63 6b 67 72 6f 75 6e 64 20 | the background |
00003e60 62 65 68 69 6e 64 20 74 68 65 20 6e 75 6d 62 65 |behind the numbe|
00003e70 72 0a 3b 20 28 68 74 20 3d 20 33 32 20 69 66 20 |r.; (ht = 32 if |
00003e80 76 67 61 20 65 6c 73 65 20 31 36 29 0a 3b 0a 3b |vga else 16).;.;|
00003e90 20 6e 62 20 20 61 73 73 75 6d 65 73 20 66 69 74 | nb assumes fit|
00003ea0 73 20 6f 6e 20 73 63 72 65 65 6e 20 26 20 63 61 |s on screen & ca|
00003eb0 6e 20 64 6f 20 61 20 66 61 73 74 20 70 6c 6f 74 |n do a fast plot|
00003ec0 20 77 69 74 68 20 6e 6f 20 63 6c 69 70 70 69 6e | with no clippin|
00003ed0 67 0a 3b 20 61 6c 73 6f 20 74 68 61 74 20 69 73 |g.; also that is|
00003ee0 20 62 65 69 6e 67 20 70 72 69 6e 74 65 64 20 61 | being printed a|
00003ef0 74 20 61 20 77 6f 72 64 20 61 6c 69 67 6e 65 64 |t a word aligned|
00003f00 20 61 64 64 72 65 73 73 20 28 69 65 20 78 20 69 | address (ie x i|
00003f10 73 20 61 20 6d 75 6c 74 69 70 6c 65 20 6f 66 20 |s a multiple of |
00003f20 38 29 0a 3b 20 61 73 73 75 6d 65 73 20 73 70 72 |8).; assumes spr|
00003f30 69 74 65 20 69 73 20 33 32 20 62 79 20 68 74 20 |ite is 32 by ht |
00003f40 70 69 78 65 6c 73 2c 20 34 62 70 70 20 26 20 73 |pixels, 4bpp & s|
00003f50 63 72 65 65 6e 20 6d 6f 64 65 20 69 73 20 36 34 |creen mode is 64|
00003f60 30 20 70 69 78 65 6c 73 20 77 69 64 65 0a 3b 0a |0 pixels wide.;.|
00003f70 09 45 58 50 4f 52 54 09 65 72 61 73 65 5f 6e 75 |.EXPORT.erase_nu|
00003f80 6d 62 65 72 0a 0a 65 6e 6e 73 74 61 09 44 43 42 |mber..ennsta.DCB|
00003f90 09 22 65 72 61 73 65 5f 6e 75 6d 62 65 72 22 2c |."erase_number",|
00003fa0 20 30 0a 09 41 4c 49 47 4e 0a 65 6e 6e 65 6e 64 | 0..ALIGN.ennend|
00003fb0 09 44 43 44 09 26 66 66 30 30 30 30 30 30 20 2b |.DCD.&ff000000 +|
00003fc0 20 65 6e 6e 65 6e 64 20 2d 20 65 6e 6e 73 74 61 | ennend - ennsta|
00003fd0 0a 0a 65 72 61 73 65 5f 6e 75 6d 62 65 72 0a 0a |..erase_number..|
00003fe0 09 53 54 4d 46 44 09 73 70 21 2c 20 7b 72 34 2d |.STMFD.sp!, {r4-|
00003ff0 72 39 2c 20 73 6c 2c 20 66 70 2c 20 6c 72 7d 0a |r9, sl, fp, lr}.|
00004000 09 41 44 52 4c 09 72 34 2c 20 76 62 6c 73 0a 09 |.ADRL.r4, vbls..|
00004010 4c 44 4d 49 41 09 72 34 2c 20 7b 72 34 2d 72 39 |LDMIA.r4, {r4-r9|
00004020 7d 0a 09 4c 44 52 09 72 34 2c 20 5b 72 62 61 6e |}..LDR.r4, [rban|
00004030 6b 5d 0a 09 53 55 42 09 72 34 2c 20 72 34 2c 20 |k]..SUB.r4, r4, |
00004040 23 31 0a 09 4c 44 52 09 72 35 2c 20 5b 72 73 63 |#1..LDR.r5, [rsc|
00004050 72 73 74 2c 20 72 34 2c 20 4c 53 4c 20 23 32 5d |rst, r4, LSL #2]|
00004060 09 3b 20 73 63 72 65 65 6e 20 62 61 73 65 20 61 |.; screen base a|
00004070 64 64 72 20 66 6f 72 20 56 44 55 20 6f 75 74 70 |ddr for VDU outp|
00004080 75 74 0a 09 4c 44 52 09 72 6f 78 2c 20 5b 72 6f |ut..LDR.rox, [ro|
00004090 78 5d 0a 09 4c 44 52 09 72 6f 79 2c 20 5b 72 6f |x]..LDR.roy, [ro|
000040a0 79 5d 0a 09 4c 44 52 09 72 6c 78 2c 20 5b 72 6c |y]..LDR.rlx, [rl|
000040b0 78 5d 0a 09 4c 44 52 09 72 6c 79 2c 20 5b 72 6c |x]..LDR.rly, [rl|
000040c0 79 5d 0a 09 41 44 44 09 72 31 30 2c 20 78 2c 20 |y]..ADD.r10, x, |
000040d0 72 6f 78 0a 09 52 53 42 09 72 31 31 2c 20 79 2c |rox..RSB.r11, y,|
000040e0 20 72 6f 79 0a 09 53 55 42 09 72 31 31 2c 20 72 | roy..SUB.r11, r|
000040f0 31 31 2c 20 23 36 34 0a 09 4d 4f 56 09 72 31 30 |11, #64..MOV.r10|
00004100 2c 20 72 31 30 2c 20 41 53 52 20 72 6c 78 09 09 |, r10, ASR rlx..|
00004110 3b 20 78 20 70 69 78 65 6c 20 63 6f 6f 72 64 20 |; x pixel coord |
00004120 72 65 6c 20 6c 65 66 74 20 73 63 72 65 65 6e 20 |rel left screen |
00004130 7d 20 6f 66 20 74 6f 70 20 6c 65 66 74 0a 09 4d |} of top left..M|
00004140 4f 56 09 72 31 31 2c 20 72 31 31 2c 20 41 53 52 |OV.r11, r11, ASR|
00004150 20 72 6c 79 09 09 3b 20 79 20 70 69 78 65 6c 20 | rly..; y pixel |
00004160 63 6f 6f 72 64 20 72 65 6c 20 74 6f 70 20 73 63 |coord rel top sc|
00004170 72 65 65 6e 20 20 7d 20 6f 66 20 6f 62 6a 65 63 |reen } of objec|
00004180 74 0a 09 41 44 44 09 72 31 31 2c 20 72 31 31 2c |t..ADD.r11, r11,|
00004190 20 23 31 0a 09 41 44 44 09 72 31 31 2c 20 72 31 | #1..ADD.r11, r1|
000041a0 31 2c 20 72 31 31 2c 20 41 53 4c 20 23 32 0a 09 |1, r11, ASL #2..|
000041b0 41 44 44 09 72 35 2c 20 72 35 2c 20 72 31 31 2c |ADD.r5, r5, r11,|
000041c0 20 41 53 4c 20 23 36 0a 09 42 49 43 09 72 31 30 | ASL #6..BIC.r10|
000041d0 2c 20 72 31 30 2c 20 23 37 0a 09 41 44 44 09 72 |, r10, #7..ADD.r|
000041e0 35 2c 20 72 35 2c 20 72 31 30 2c 20 41 53 52 20 |5, r5, r10, ASR |
000041f0 23 31 09 09 3b 20 73 63 72 65 65 6e 20 74 6f 70 |#1..; screen top|
00004200 20 6c 65 66 74 20 6f 66 20 6e 75 6d 62 65 72 0a | left of number.|
00004210 09 4c 44 52 09 72 34 2c 20 5b 73 70 72 2c 20 23 |.LDR.r4, [spr, #|
00004220 69 6d 61 67 65 5d 0a 09 41 44 44 09 72 34 2c 20 |image]..ADD.r4, |
00004230 73 70 72 2c 20 72 34 09 09 09 3b 20 73 70 72 69 |spr, r4...; spri|
00004240 74 65 20 74 6f 70 20 6c 65 66 74 0a 09 4d 4f 56 |te top left..MOV|
00004250 09 72 33 2c 20 23 33 32 0a 09 4d 4f 56 09 72 33 |.r3, #32..MOV.r3|
00004260 2c 20 72 33 2c 20 41 53 52 20 72 6c 79 0a 65 6e |, r3, ASR rly.en|
00004270 5f 6c 6f 6f 70 09 4c 44 4d 49 41 09 72 34 21 2c |_loop.LDMIA.r4!,|
00004280 20 7b 72 36 2c 72 37 2c 72 38 2c 72 39 7d 0a 09 | {r6,r7,r8,r9}..|
00004290 53 54 4d 49 41 20 20 20 72 35 2c 20 7b 72 36 2c |STMIA r5, {r6,|
000042a0 72 37 2c 72 38 2c 72 39 7d 0a 09 41 44 44 09 72 |r7,r8,r9}..ADD.r|
000042b0 35 2c 20 72 35 2c 20 23 33 32 30 0a 09 4c 44 4d |5, r5, #320..LDM|
000042c0 49 41 09 72 34 21 2c 20 7b 72 36 2c 72 37 2c 72 |IA.r4!, {r6,r7,r|
000042d0 38 2c 72 39 7d 0a 09 53 54 4d 49 41 20 20 20 72 |8,r9}..STMIA r|
000042e0 35 2c 20 7b 72 36 2c 72 37 2c 72 38 2c 72 39 7d |5, {r6,r7,r8,r9}|
000042f0 0a 09 41 44 44 09 72 35 2c 20 72 35 2c 20 23 33 |..ADD.r5, r5, #3|
00004300 32 30 0a 09 53 55 42 53 09 72 33 2c 20 72 33 2c |20..SUBS.r3, r3,|
00004310 20 23 31 0a 09 42 4e 45 09 65 6e 5f 6c 6f 6f 70 | #1..BNE.en_loop|
00004320 0a 65 6e 5f 65 78 69 74 09 4c 44 4d 46 44 09 73 |.en_exit.LDMFD.s|
00004330 70 21 2c 20 7b 72 34 2d 72 39 2c 20 73 6c 2c 20 |p!, {r4-r9, sl, |
00004340 66 70 2c 20 70 63 7d 5e 0a 0a 0a 0a 3b 20 65 72 |fp, pc}^....; er|
00004350 61 73 65 5f 62 61 72 0a 3b 20 61 20 6c 65 61 66 |ase_bar.; a leaf|
00004360 20 41 50 43 53 20 66 75 6e 63 74 69 6f 6e 0a 3b | APCS function.;|
00004370 0a 3b 20 43 20 70 72 6f 74 6f 74 79 70 65 3a 0a |.; C prototype:.|
00004380 3b 20 76 6f 69 64 20 65 72 61 73 65 5f 62 61 72 |; void erase_bar|
00004390 28 69 6e 74 20 68 2c 20 76 6f 69 64 20 2a 73 70 |(int h, void *sp|
000043a0 72 2c 20 69 6e 74 20 78 2c 20 69 6e 74 20 79 29 |r, int x, int y)|
000043b0 3b 0a 3b 0a 3b 20 61 63 74 75 61 6c 6c 79 20 74 |;.;.; actually t|
000043c0 68 69 73 20 66 6e 20 70 6c 6f 74 73 20 61 20 33 |his fn plots a 3|
000043d0 32 30 20 78 20 68 20 73 70 72 69 74 65 20 6f 6e |20 x h sprite on|
000043e0 20 73 63 72 65 65 6e 20 6f 76 65 72 20 74 68 65 | screen over the|
000043f0 20 62 61 72 20 72 65 67 69 6f 6e 20 2d 20 73 70 | bar region - sp|
00004400 72 69 74 65 0a 3b 20 73 68 6f 75 6c 64 20 62 65 |rite.; should be|
00004410 20 73 65 74 20 75 70 20 62 65 66 6f 72 65 20 74 | set up before t|
00004420 6f 20 61 20 63 6f 70 79 20 6f 66 20 74 68 65 20 |o a copy of the |
00004430 62 61 63 6b 67 72 6f 75 6e 64 20 62 65 68 69 6e |background behin|
00004440 64 20 74 68 65 20 62 61 72 0a 3b 0a 3b 20 6e 62 |d the bar.;.; nb|
00004450 20 20 61 73 73 75 6d 65 73 20 66 69 74 73 20 6f | assumes fits o|
00004460 6e 20 73 63 72 65 65 6e 20 26 20 63 61 6e 20 64 |n screen & can d|
00004470 6f 20 61 20 66 61 73 74 20 70 6c 6f 74 20 77 69 |o a fast plot wi|
00004480 74 68 20 6e 6f 20 63 6c 69 70 70 69 6e 67 0a 3b |th no clipping.;|
00004490 20 61 6c 73 6f 20 74 68 61 74 20 69 73 20 62 65 | also that is be|
000044a0 69 6e 67 20 70 72 69 6e 74 65 64 20 61 74 20 61 |ing printed at a|
000044b0 20 77 6f 72 64 20 61 6c 69 67 6e 65 64 20 61 64 | word aligned ad|
000044c0 64 72 65 73 73 20 28 69 65 20 78 20 69 73 20 61 |dress (ie x is a|
000044d0 20 6d 75 6c 74 69 70 6c 65 20 6f 66 20 38 29 0a | multiple of 8).|
000044e0 3b 20 61 73 73 75 6d 65 73 20 73 70 72 69 74 65 |; assumes sprite|
000044f0 20 69 73 20 33 32 30 20 62 79 20 28 68 3e 3e 72 | is 320 by (h>>r|
00004500 6c 79 29 20 70 69 78 65 6c 73 2c 20 34 62 70 70 |ly) pixels, 4bpp|
00004510 20 26 20 73 63 72 65 65 6e 20 6d 6f 64 65 20 69 | & screen mode i|
00004520 73 20 36 34 30 20 70 69 78 65 6c 73 20 77 69 64 |s 640 pixels wid|
00004530 65 0a 3b 0a 09 45 58 50 4f 52 54 09 65 72 61 73 |e.;..EXPORT.eras|
00004540 65 5f 62 61 72 0a 0a 65 62 6e 73 74 61 09 44 43 |e_bar..ebnsta.DC|
00004550 42 09 22 65 72 61 73 65 5f 62 61 72 22 2c 20 30 |B."erase_bar", 0|
00004560 0a 09 41 4c 49 47 4e 0a 65 62 6e 65 6e 64 09 44 |..ALIGN.ebnend.D|
00004570 43 44 09 26 66 66 30 30 30 30 30 30 20 2b 20 65 |CD.&ff000000 + e|
00004580 62 6e 65 6e 64 20 2d 20 65 62 6e 73 74 61 0a 0a |bnend - ebnsta..|
00004590 65 72 61 73 65 5f 62 61 72 0a 0a 09 53 54 4d 46 |erase_bar...STMF|
000045a0 44 09 73 70 21 2c 20 7b 72 34 2d 72 39 2c 20 73 |D.sp!, {r4-r9, s|
000045b0 6c 2c 20 66 70 2c 20 6c 72 7d 0a 09 41 44 52 4c |l, fp, lr}..ADRL|
000045c0 09 72 34 2c 20 76 62 6c 73 0a 09 4c 44 4d 49 41 |.r4, vbls..LDMIA|
000045d0 09 72 34 2c 20 7b 72 34 2d 72 39 7d 0a 09 4c 44 |.r4, {r4-r9}..LD|
000045e0 52 09 72 34 2c 20 5b 72 62 61 6e 6b 5d 0a 09 53 |R.r4, [rbank]..S|
000045f0 55 42 09 72 34 2c 20 72 34 2c 20 23 31 0a 09 4c |UB.r4, r4, #1..L|
00004600 44 52 09 72 35 2c 20 5b 72 73 63 72 73 74 2c 20 |DR.r5, [rscrst, |
00004610 72 34 2c 20 4c 53 4c 20 23 32 5d 09 3b 20 73 63 |r4, LSL #2].; sc|
00004620 72 65 65 6e 20 62 61 73 65 20 61 64 64 72 20 66 |reen base addr f|
00004630 6f 72 20 56 44 55 20 6f 75 74 70 75 74 0a 09 4c |or VDU output..L|
00004640 44 52 09 72 6f 78 2c 20 5b 72 6f 78 5d 0a 09 4c |DR.rox, [rox]..L|
00004650 44 52 09 72 6f 79 2c 20 5b 72 6f 79 5d 0a 09 4c |DR.roy, [roy]..L|
00004660 44 52 09 72 6c 78 2c 20 5b 72 6c 78 5d 0a 09 4c |DR.rlx, [rlx]..L|
00004670 44 52 09 72 6c 79 2c 20 5b 72 6c 79 5d 0a 09 41 |DR.rly, [rly]..A|
00004680 44 44 09 72 31 30 2c 20 78 2c 20 72 6f 78 0a 09 |DD.r10, x, rox..|
00004690 52 53 42 09 72 31 31 2c 20 79 2c 20 72 6f 79 0a |RSB.r11, y, roy.|
000046a0 09 53 55 42 09 72 31 31 2c 20 72 31 31 2c 20 68 |.SUB.r11, r11, h|
000046b0 0a 09 4d 4f 56 09 72 31 30 2c 20 72 31 30 2c 20 |..MOV.r10, r10, |
000046c0 41 53 52 20 72 6c 78 09 09 3b 20 78 20 70 69 78 |ASR rlx..; x pix|
000046d0 65 6c 20 63 6f 6f 72 64 20 72 65 6c 20 6c 65 66 |el coord rel lef|
000046e0 74 20 73 63 72 65 65 6e 20 7d 20 6f 66 20 74 6f |t screen } of to|
000046f0 70 20 6c 65 66 74 0a 09 4d 4f 56 09 72 31 31 2c |p left..MOV.r11,|
00004700 20 72 31 31 2c 20 41 53 52 20 72 6c 79 09 09 3b | r11, ASR rly..;|
00004710 20 79 20 70 69 78 65 6c 20 63 6f 6f 72 64 20 72 | y pixel coord r|
00004720 65 6c 20 74 6f 70 20 73 63 72 65 65 6e 20 20 7d |el top screen }|
00004730 20 6f 66 20 6f 62 6a 65 63 74 0a 09 41 44 44 09 | of object..ADD.|
00004740 72 31 31 2c 20 72 31 31 2c 20 23 31 0a 09 41 44 |r11, r11, #1..AD|
00004750 44 09 72 31 31 2c 20 72 31 31 2c 20 72 31 31 2c |D.r11, r11, r11,|
00004760 20 41 53 4c 20 23 32 0a 09 41 44 44 09 72 35 2c | ASL #2..ADD.r5,|
00004770 20 72 35 2c 20 72 31 31 2c 20 41 53 4c 20 23 36 | r5, r11, ASL #6|
00004780 0a 09 42 49 43 09 72 31 30 2c 20 72 31 30 2c 20 |..BIC.r10, r10, |
00004790 23 37 0a 09 41 44 44 09 72 32 2c 20 72 35 2c 20 |#7..ADD.r2, r5, |
000047a0 72 31 30 2c 20 41 53 52 20 23 31 09 09 3b 20 73 |r10, ASR #1..; s|
000047b0 63 72 65 65 6e 20 74 6f 70 20 6c 65 66 74 20 6f |creen top left o|
000047c0 66 20 6e 75 6d 62 65 72 0a 09 4c 44 52 09 72 34 |f number..LDR.r4|
000047d0 2c 20 5b 73 70 72 2c 20 23 69 6d 61 67 65 5d 0a |, [spr, #image].|
000047e0 09 41 44 44 09 72 31 2c 20 73 70 72 2c 20 72 34 |.ADD.r1, spr, r4|
000047f0 09 09 09 3b 20 73 70 72 69 74 65 20 74 6f 70 20 |...; sprite top |
00004800 6c 65 66 74 0a 09 4d 4f 56 09 68 2c 20 68 2c 20 |left..MOV.h, h, |
00004810 41 53 52 20 72 6c 79 0a 65 62 5f 6c 6f 6f 70 09 |ASR rly.eb_loop.|
00004820 4c 44 4d 49 41 09 72 31 21 2c 20 7b 72 33 2d 72 |LDMIA.r1!, {r3-r|
00004830 31 32 7d 0a 09 53 54 4d 49 41 20 20 20 72 32 21 |12}..STMIA r2!|
00004840 2c 20 7b 72 33 2d 72 31 32 7d 0a 09 4c 44 4d 49 |, {r3-r12}..LDMI|
00004850 41 09 72 31 21 2c 20 7b 72 33 2d 72 31 32 7d 0a |A.r1!, {r3-r12}.|
00004860 09 53 54 4d 49 41 20 20 20 72 32 21 2c 20 7b 72 |.STMIA r2!, {r|
00004870 33 2d 72 31 32 7d 0a 09 4c 44 4d 49 41 09 72 31 |3-r12}..LDMIA.r1|
00004880 21 2c 20 7b 72 33 2d 72 31 32 7d 0a 09 53 54 4d |!, {r3-r12}..STM|
00004890 49 41 20 20 20 72 32 21 2c 20 7b 72 33 2d 72 31 |IA r2!, {r3-r1|
000048a0 32 7d 0a 09 4c 44 4d 49 41 09 72 31 21 2c 20 7b |2}..LDMIA.r1!, {|
000048b0 72 33 2d 72 31 32 7d 0a 09 53 54 4d 49 41 20 20 |r3-r12}..STMIA |
000048c0 20 72 32 21 2c 20 7b 72 33 2d 72 31 32 7d 0a 09 | r2!, {r3-r12}..|
000048d0 41 44 44 09 72 32 2c 20 72 32 2c 20 23 33 32 30 |ADD.r2, r2, #320|
000048e0 2d 31 36 30 0a 09 53 55 42 53 09 68 2c 20 68 2c |-160..SUBS.h, h,|
000048f0 20 23 31 0a 09 42 4e 45 09 65 62 5f 6c 6f 6f 70 | #1..BNE.eb_loop|
00004900 0a 65 62 5f 65 78 69 74 09 4c 44 4d 46 44 09 73 |.eb_exit.LDMFD.s|
00004910 70 21 2c 20 7b 72 34 2d 72 39 2c 20 73 6c 2c 20 |p!, {r4-r9, sl, |
00004920 66 70 2c 20 70 63 7d 5e 0a 0a 0a 0a 09 45 4e 44 |fp, pc}^.....END|
00004930 0a |.|
00004931 
.