Home » Archimedes archive » Acorn Computing » 1993 06 Mega Disk.adf » 93_06 » Miscellany/SolidDrag/!SolidDrag/Source/drag_src5
Miscellany/SolidDrag/!SolidDrag/Source/drag_src5
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 » Acorn Computing » 1993 06 Mega Disk.adf » 93_06 |
| Filename: | Miscellany/SolidDrag/!SolidDrag/Source/drag_src5 |
| Read OK: | ✔ |
| File size: | 1721 bytes |
| Load address: | 0000 |
| Exec address: | 0000 |
File contents
; > drag_src
r0 RN 0
r1 RN 1
r2 RN 2
r3 RN 3
r4 RN 4
r5 RN 5
r6 RN 6
r7 RN 7
r8 RN 8
r9 RN 9
r10 RN 10
r11 RN 11
r12 RN 12
sp RN 13
lr RN 14
pc RN 15
Wimp_DragBox EQU &400D0
XWimp_DragBox EQU &600D0
XWimp_GetPointerInfo EQU &600CF
XWimp_GetIconState EQU &600CE
XDragASprite_Start EQU &62400
XDragASprite_Stop EQU &62401
XOS_AddCallBack EQU &20054
V_FLAG EQU 1:SHL:28
module_base
DCD 0
DCD initialise - module_base
DCD finalise - module_base
DCD 0
DCD title_string - module_base
DCD help_string - module_base
DCD 0
; ---------------------------------------------------------------------------------------------------------
initialise
STMFD sp!, {lr}
BL claim_swi_vector
LDMFD sp!, {pc}
; ---------------------------------------------------------------------------------------------------------
finalise
STMFD sp!, {lr}
BL release_swi_vector
LDMFD sp!, {pc}^
; ---------------------------------------------------------------------------------------------------------
title_string
DCB "AutoDrag",0
help_string
DCB "AutoDrag ",9,"0.10 (09 Sep 1992)",0
ALIGN
; ---------------------------------------------------------------------------------------------------------
release_swi_vector
MOV r0, #8
LDR r1, [r0]
LDR r2, new_branch ; check that our SWI decoder hasn't been replaced
CMP r1, r2
LDREQ r1, old_branch ; replace original decoder if it hasn't
STREQ r1, [r0]
MOVEQ r0, #0
STREQ r1, old_branch
MOVEQS pc, lr
ADR r0, error_block ; otherwise return an error
ORRS pc, lr, #V_FLAG
error_block DCD &103
DCB "Can't detach SWI handler", 0
ALIGN
; ---------------------------------------------------------------------------------------------------------
claim_swi_vector
MOV r0, #8
LDR r0, [r0] ; get branch to SWI handler
STR r0, old_branch
ADR r1, second_branch-8 ; insert in our own code
SUB r0, r0, r1, LSR #2
STR r0, second_branch
ADD r0, r0, #(second_branch-first_branch) / 4
SUB r0, r0, #&D0000000
STR r0, first_branch ; convert to a BNE
MOV r1, #8
ADR r0, swi_patch-8-8
MOV r0, r0, LSR #2
ADD r0, r0, #&EA000000
STR r0, [r1]
STR r0, new_branch ; put in a branch to our code
MOV pc, lr
; ---------------------------------------------------------------------------------------------------------
swi_patch
STMFD sp!,{lr}
BIC lr, lr, #&FC000003
LDR lr, [lr,#-4] ; get SWI instruction
BIC lr, lr, #&FF000000
BIC lr, lr, #&20000
SUB lr, lr, #&40000
CMP lr, #&D0 ; is it Wimp_DragBox ?
LDMNEFD sp!, {lr} ; otherwise drop through to SWI handler
first_branch
DCD 0
LDR lr, [r1,#4] ; get drag type
CMP lr, #5
BEQ callback_code
continue
LDMFD sp!, {lr} ; call Wimp_DragBox as usual
second_branch
DCD 0
not_sprite
LDMFD sp!,{r0-r4,lr}
B continue
workspace
% 52
callback_code
STMFD sp!,{r0-r4,lr}
MOV r4, r1
ADR r1, workspace
SWI XWimp_GetPointerInfo
LDR r0, [r1, #16]
CMP r0, #0 ; if there's no icon under the pointer then
BLT not_sprite ; do the usual drag box
ADD r1, r1, #12
SWI XWimp_GetIconState ; get data block for icon under the pointer
LDR r3, [r1, #24]
TST r3, #2 ; if it's not a sprite then do nothing
BEQ not_sprite
TST r3, #256 ; is it indirected ?
BNE indirected
ADD r2, r1, #28 ; sprite name directly specified
MOV r1, #1
B do_drag
indirected
TST r3, #1
BNE text_and_sprite
LDR r3, [r1, #36] ; get indirected sprite name length
LDR r2, [r1, #28]
LDR r1, [r1, #32]
CMP r3, #0 ; if length = 0 then r2 points to start of sprite
ADDEQ r2, r2, #4
B do_drag
text_and_sprite
LDR r2, [r1, #32]
find_start
LDRB r3, [r2], #1 ; rather sloppy code to extract sprite name
CMP r3, #'S' ; from validation string
CMPNE r3, #'s'
BNE find_start
MOV r1, #1
do_drag
MOV r0, #128+64+32+4+1
ADD r3, r4, #8
ADD r4, r4, #24
SWI XDragASprite_Start
LDMVCFD sp!,{r0-r4,lr,pc}^ ; return immediately if there's no error
ADD sp, sp, #4
LDMFD sp!,{r1-r4,lr}
LDMFD sp!,{lr} ; otherwise return with V set and error pointer in r0
ORRS pc, lr, #V_FLAG
; ---------------------------------------------------------------------------------------------------------
old_branch DCD 0 ; branch to original SWI decoder
new_branch DCD 0 ; branch to our new SWI decoder
END
00000000 3b 20 3e 20 64 72 61 67 5f 73 72 63 0a 72 30 20 |; > drag_src.r0 |
00000010 52 4e 20 30 0a 72 31 20 52 4e 20 31 0a 72 32 20 |RN 0.r1 RN 1.r2 |
00000020 52 4e 20 32 0a 72 33 20 52 4e 20 33 0a 72 34 20 |RN 2.r3 RN 3.r4 |
00000030 52 4e 20 34 0a 72 35 20 52 4e 20 35 0a 72 36 20 |RN 4.r5 RN 5.r6 |
00000040 52 4e 20 36 0a 72 37 20 52 4e 20 37 0a 72 38 20 |RN 6.r7 RN 7.r8 |
00000050 52 4e 20 38 0a 72 39 20 52 4e 20 39 0a 72 31 30 |RN 8.r9 RN 9.r10|
00000060 20 52 4e 20 31 30 0a 72 31 31 20 52 4e 20 31 31 | RN 10.r11 RN 11|
00000070 0a 72 31 32 20 52 4e 20 31 32 0a 73 70 20 52 4e |.r12 RN 12.sp RN|
00000080 20 31 33 0a 6c 72 20 52 4e 20 31 34 0a 70 63 20 | 13.lr RN 14.pc |
00000090 52 4e 20 31 35 0a 0a 57 69 6d 70 5f 44 72 61 67 |RN 15..Wimp_Drag|
000000a0 42 6f 78 20 20 20 20 20 20 20 20 20 20 20 20 45 |Box E|
000000b0 51 55 20 26 34 30 30 44 30 0a 58 57 69 6d 70 5f |QU &400D0.XWimp_|
000000c0 44 72 61 67 42 6f 78 20 20 20 20 20 20 20 20 20 |DragBox |
000000d0 20 20 45 51 55 20 26 36 30 30 44 30 0a 58 57 69 | EQU &600D0.XWi|
000000e0 6d 70 5f 47 65 74 50 6f 69 6e 74 65 72 49 6e 66 |mp_GetPointerInf|
000000f0 6f 20 20 20 20 45 51 55 20 26 36 30 30 43 46 0a |o EQU &600CF.|
00000100 58 57 69 6d 70 5f 47 65 74 49 63 6f 6e 53 74 61 |XWimp_GetIconSta|
00000110 74 65 20 20 20 20 20 20 45 51 55 20 26 36 30 30 |te EQU &600|
00000120 43 45 0a 58 44 72 61 67 41 53 70 72 69 74 65 5f |CE.XDragASprite_|
00000130 53 74 61 72 74 20 20 20 20 20 20 45 51 55 20 26 |Start EQU &|
00000140 36 32 34 30 30 0a 58 44 72 61 67 41 53 70 72 69 |62400.XDragASpri|
00000150 74 65 5f 53 74 6f 70 20 20 20 20 20 20 20 45 51 |te_Stop EQ|
00000160 55 20 26 36 32 34 30 31 0a 58 4f 53 5f 41 64 64 |U &62401.XOS_Add|
00000170 43 61 6c 6c 42 61 63 6b 20 20 20 20 20 20 20 20 |CallBack |
00000180 20 45 51 55 20 26 32 30 30 35 34 0a 56 5f 46 4c | EQU &20054.V_FL|
00000190 41 47 20 20 20 20 20 20 20 20 20 20 20 20 20 20 |AG |
000001a0 20 20 20 20 45 51 55 20 31 3a 53 48 4c 3a 32 38 | EQU 1:SHL:28|
000001b0 0a 0a 6d 6f 64 75 6c 65 5f 62 61 73 65 0a 20 20 |..module_base. |
000001c0 20 20 20 20 20 20 44 43 44 20 20 20 20 20 30 0a | DCD 0.|
000001d0 20 20 20 20 20 20 20 20 44 43 44 20 20 20 20 20 | DCD |
000001e0 69 6e 69 74 69 61 6c 69 73 65 20 2d 20 6d 6f 64 |initialise - mod|
000001f0 75 6c 65 5f 62 61 73 65 0a 20 20 20 20 20 20 20 |ule_base. |
00000200 20 44 43 44 20 20 20 20 20 66 69 6e 61 6c 69 73 | DCD finalis|
00000210 65 20 2d 20 6d 6f 64 75 6c 65 5f 62 61 73 65 0a |e - module_base.|
00000220 20 20 20 20 20 20 20 20 44 43 44 20 20 20 20 20 | DCD |
00000230 30 0a 20 20 20 20 20 20 20 20 44 43 44 20 20 20 |0. DCD |
00000240 20 20 74 69 74 6c 65 5f 73 74 72 69 6e 67 20 2d | title_string -|
00000250 20 6d 6f 64 75 6c 65 5f 62 61 73 65 0a 20 20 20 | module_base. |
00000260 20 20 20 20 20 44 43 44 20 20 20 20 20 68 65 6c | DCD hel|
00000270 70 5f 73 74 72 69 6e 67 20 2d 20 6d 6f 64 75 6c |p_string - modul|
00000280 65 5f 62 61 73 65 0a 20 20 20 20 20 20 20 20 44 |e_base. D|
00000290 43 44 20 20 20 20 20 30 0a 0a 0a 3b 20 2d 2d 2d |CD 0...; ---|
000002a0 2d 2d 2d 2d 2d 2d 2d 2d 2d 2d 2d 2d 2d 2d 2d 2d |----------------|
*
00000300 2d 2d 2d 2d 2d 2d 0a 0a 69 6e 69 74 69 61 6c 69 |------..initiali|
00000310 73 65 0a 20 20 20 20 20 20 20 20 53 54 4d 46 44 |se. STMFD|
00000320 20 20 20 73 70 21 2c 20 7b 6c 72 7d 0a 20 20 20 | sp!, {lr}. |
00000330 20 20 20 20 20 42 4c 20 20 20 20 20 20 63 6c 61 | BL cla|
00000340 69 6d 5f 73 77 69 5f 76 65 63 74 6f 72 0a 20 20 |im_swi_vector. |
00000350 20 20 20 20 20 20 4c 44 4d 46 44 20 20 20 73 70 | LDMFD sp|
00000360 21 2c 20 7b 70 63 7d 0a 0a 3b 20 2d 2d 2d 2d 2d |!, {pc}..; -----|
00000370 2d 2d 2d 2d 2d 2d 2d 2d 2d 2d 2d 2d 2d 2d 2d 2d |----------------|
*
000003d0 2d 2d 2d 2d 0a 0a 66 69 6e 61 6c 69 73 65 0a 20 |----..finalise. |
000003e0 20 20 20 20 20 20 20 53 54 4d 46 44 20 20 20 73 | STMFD s|
000003f0 70 21 2c 20 7b 6c 72 7d 0a 20 20 20 20 20 20 20 |p!, {lr}. |
00000400 20 42 4c 20 20 20 20 20 20 72 65 6c 65 61 73 65 | BL release|
00000410 5f 73 77 69 5f 76 65 63 74 6f 72 0a 20 20 20 20 |_swi_vector. |
00000420 20 20 20 20 4c 44 4d 46 44 20 20 20 73 70 21 2c | LDMFD sp!,|
00000430 20 7b 70 63 7d 5e 0a 0a 3b 20 2d 2d 2d 2d 2d 2d | {pc}^..; ------|
00000440 2d 2d 2d 2d 2d 2d 2d 2d 2d 2d 2d 2d 2d 2d 2d 2d |----------------|
*
000004a0 2d 2d 2d 0a 0a 74 69 74 6c 65 5f 73 74 72 69 6e |---..title_strin|
000004b0 67 0a 20 20 20 20 20 20 20 20 44 43 42 20 20 20 |g. DCB |
000004c0 20 20 22 41 75 74 6f 44 72 61 67 22 2c 30 0a 0a | "AutoDrag",0..|
000004d0 68 65 6c 70 5f 73 74 72 69 6e 67 0a 20 20 20 20 |help_string. |
000004e0 20 20 20 20 44 43 42 20 20 20 20 20 22 41 75 74 | DCB "Aut|
000004f0 6f 44 72 61 67 20 22 2c 39 2c 22 30 2e 31 30 20 |oDrag ",9,"0.10 |
00000500 28 30 39 20 53 65 70 20 31 39 39 32 29 22 2c 30 |(09 Sep 1992)",0|
00000510 0a 20 20 20 20 20 20 20 20 41 4c 49 47 4e 0a 0a |. ALIGN..|
00000520 3b 20 2d 2d 2d 2d 2d 2d 2d 2d 2d 2d 2d 2d 2d 2d |; --------------|
00000530 2d 2d 2d 2d 2d 2d 2d 2d 2d 2d 2d 2d 2d 2d 2d 2d |----------------|
*
00000580 2d 2d 2d 2d 2d 2d 2d 2d 2d 2d 2d 0a 0a 72 65 6c |-----------..rel|
00000590 65 61 73 65 5f 73 77 69 5f 76 65 63 74 6f 72 0a |ease_swi_vector.|
000005a0 20 20 20 20 20 20 20 20 4d 4f 56 20 20 20 20 20 | MOV |
000005b0 72 30 2c 20 23 38 0a 20 20 20 20 20 20 20 20 4c |r0, #8. L|
000005c0 44 52 20 20 20 20 20 72 31 2c 20 5b 72 30 5d 0a |DR r1, [r0].|
000005d0 20 20 20 20 20 20 20 20 4c 44 52 20 20 20 20 20 | LDR |
000005e0 72 32 2c 20 6e 65 77 5f 62 72 61 6e 63 68 20 20 |r2, new_branch |
000005f0 20 20 20 20 20 20 20 20 20 20 20 20 20 20 20 20 | |
00000600 3b 20 63 68 65 63 6b 20 74 68 61 74 20 6f 75 72 |; check that our|
00000610 20 53 57 49 20 64 65 63 6f 64 65 72 20 68 61 73 | SWI decoder has|
00000620 6e 27 74 20 62 65 65 6e 20 72 65 70 6c 61 63 65 |n't been replace|
00000630 64 0a 20 20 20 20 20 20 20 20 43 4d 50 20 20 20 |d. CMP |
00000640 20 20 72 31 2c 20 72 32 0a 20 20 20 20 20 20 20 | r1, r2. |
00000650 20 4c 44 52 45 51 20 20 20 72 31 2c 20 6f 6c 64 | LDREQ r1, old|
00000660 5f 62 72 61 6e 63 68 20 20 20 20 20 20 20 20 20 |_branch |
00000670 20 20 20 20 20 20 20 20 20 3b 20 72 65 70 6c 61 | ; repla|
00000680 63 65 20 6f 72 69 67 69 6e 61 6c 20 64 65 63 6f |ce original deco|
00000690 64 65 72 20 69 66 20 69 74 20 68 61 73 6e 27 74 |der if it hasn't|
000006a0 0a 20 20 20 20 20 20 20 20 53 54 52 45 51 20 20 |. STREQ |
000006b0 20 72 31 2c 20 5b 72 30 5d 0a 20 20 20 20 20 20 | r1, [r0]. |
000006c0 20 20 4d 4f 56 45 51 20 20 20 72 30 2c 20 23 30 | MOVEQ r0, #0|
000006d0 0a 20 20 20 20 20 20 20 20 53 54 52 45 51 20 20 |. STREQ |
000006e0 20 72 31 2c 20 6f 6c 64 5f 62 72 61 6e 63 68 0a | r1, old_branch.|
000006f0 20 20 20 20 20 20 20 20 4d 4f 56 45 51 53 20 20 | MOVEQS |
00000700 70 63 2c 20 6c 72 0a 0a 20 20 20 20 20 20 20 20 |pc, lr.. |
00000710 41 44 52 20 20 20 72 30 2c 20 65 72 72 6f 72 5f |ADR r0, error_|
00000720 62 6c 6f 63 6b 20 20 20 20 20 20 20 20 20 20 20 |block |
00000730 20 20 20 20 20 20 3b 20 6f 74 68 65 72 77 69 73 | ; otherwis|
00000740 65 20 72 65 74 75 72 6e 20 61 6e 20 65 72 72 6f |e return an erro|
00000750 72 0a 20 20 20 20 20 20 20 20 4f 52 52 53 20 20 |r. ORRS |
00000760 70 63 2c 20 6c 72 2c 20 23 56 5f 46 4c 41 47 0a |pc, lr, #V_FLAG.|
00000770 0a 65 72 72 6f 72 5f 62 6c 6f 63 6b 20 20 20 20 |.error_block |
00000780 20 44 43 44 20 20 20 20 20 26 31 30 33 0a 20 20 | DCD &103. |
00000790 20 20 20 20 20 20 20 20 20 20 20 20 20 20 44 43 | DC|
000007a0 42 20 20 20 20 20 22 43 61 6e 27 74 20 64 65 74 |B "Can't det|
000007b0 61 63 68 20 53 57 49 20 68 61 6e 64 6c 65 72 22 |ach SWI handler"|
000007c0 2c 20 30 0a 20 20 20 20 20 20 20 20 20 20 20 20 |, 0. |
000007d0 20 20 20 20 41 4c 49 47 4e 0a 0a 3b 20 2d 2d 2d | ALIGN..; ---|
000007e0 2d 2d 2d 2d 2d 2d 2d 2d 2d 2d 2d 2d 2d 2d 2d 2d |----------------|
*
00000840 2d 2d 2d 2d 2d 2d 0a 0a 63 6c 61 69 6d 5f 73 77 |------..claim_sw|
00000850 69 5f 76 65 63 74 6f 72 0a 20 20 20 20 20 20 20 |i_vector. |
00000860 20 4d 4f 56 20 20 20 20 20 72 30 2c 20 23 38 0a | MOV r0, #8.|
00000870 20 20 20 20 20 20 20 20 4c 44 52 20 20 20 20 20 | LDR |
00000880 72 30 2c 20 5b 72 30 5d 20 20 20 20 20 20 20 20 |r0, [r0] |
00000890 20 20 20 20 20 20 20 20 20 20 20 20 20 20 20 20 | |
000008a0 3b 20 67 65 74 20 62 72 61 6e 63 68 20 74 6f 20 |; get branch to |
000008b0 53 57 49 20 68 61 6e 64 6c 65 72 0a 20 20 20 20 |SWI handler. |
000008c0 20 20 20 20 53 54 52 20 20 20 20 20 72 30 2c 20 | STR r0, |
000008d0 6f 6c 64 5f 62 72 61 6e 63 68 0a 0a 20 20 20 20 |old_branch.. |
000008e0 20 20 20 20 41 44 52 20 20 20 20 20 72 31 2c 20 | ADR r1, |
000008f0 73 65 63 6f 6e 64 5f 62 72 61 6e 63 68 2d 38 20 |second_branch-8 |
00000900 20 20 20 20 20 20 20 20 20 20 20 20 3b 20 69 6e | ; in|
00000910 73 65 72 74 20 69 6e 20 6f 75 72 20 6f 77 6e 20 |sert in our own |
00000920 63 6f 64 65 0a 20 20 20 20 20 20 20 20 53 55 42 |code. SUB|
00000930 20 20 20 20 20 72 30 2c 20 72 30 2c 20 72 31 2c | r0, r0, r1,|
00000940 20 4c 53 52 20 23 32 0a 20 20 20 20 20 20 20 20 | LSR #2. |
00000950 53 54 52 20 20 20 20 20 72 30 2c 20 73 65 63 6f |STR r0, seco|
00000960 6e 64 5f 62 72 61 6e 63 68 0a 0a 20 20 20 20 20 |nd_branch.. |
00000970 20 20 20 41 44 44 20 20 20 20 20 72 30 2c 20 72 | ADD r0, r|
00000980 30 2c 20 23 28 73 65 63 6f 6e 64 5f 62 72 61 6e |0, #(second_bran|
00000990 63 68 2d 66 69 72 73 74 5f 62 72 61 6e 63 68 29 |ch-first_branch)|
000009a0 20 2f 20 34 0a 20 20 20 20 20 20 20 20 53 55 42 | / 4. SUB|
000009b0 20 20 20 20 20 72 30 2c 20 72 30 2c 20 23 26 44 | r0, r0, #&D|
000009c0 30 30 30 30 30 30 30 0a 20 20 20 20 20 20 20 20 |0000000. |
000009d0 53 54 52 20 20 20 20 20 72 30 2c 20 66 69 72 73 |STR r0, firs|
000009e0 74 5f 62 72 61 6e 63 68 20 20 20 20 20 20 20 20 |t_branch |
000009f0 20 20 20 20 20 20 20 20 3b 20 63 6f 6e 76 65 72 | ; conver|
00000a00 74 20 74 6f 20 61 20 42 4e 45 0a 0a 20 20 20 20 |t to a BNE.. |
00000a10 20 20 20 20 4d 4f 56 20 20 20 20 20 72 31 2c 20 | MOV r1, |
00000a20 23 38 0a 20 20 20 20 20 20 20 20 41 44 52 20 20 |#8. ADR |
00000a30 20 20 20 72 30 2c 20 73 77 69 5f 70 61 74 63 68 | r0, swi_patch|
00000a40 2d 38 2d 38 0a 20 20 20 20 20 20 20 20 4d 4f 56 |-8-8. MOV|
00000a50 20 20 20 20 20 72 30 2c 20 72 30 2c 20 4c 53 52 | r0, r0, LSR|
00000a60 20 23 32 0a 20 20 20 20 20 20 20 20 41 44 44 20 | #2. ADD |
00000a70 20 20 20 20 72 30 2c 20 72 30 2c 20 23 26 45 41 | r0, r0, #&EA|
00000a80 30 30 30 30 30 30 0a 20 20 20 20 20 20 20 20 53 |000000. S|
00000a90 54 52 20 20 20 20 20 72 30 2c 20 5b 72 31 5d 0a |TR r0, [r1].|
00000aa0 20 20 20 20 20 20 20 20 53 54 52 20 20 20 20 20 | STR |
00000ab0 72 30 2c 20 6e 65 77 5f 62 72 61 6e 63 68 20 20 |r0, new_branch |
00000ac0 20 20 20 20 20 20 20 20 20 20 20 20 20 20 20 20 | |
00000ad0 3b 20 70 75 74 20 69 6e 20 61 20 62 72 61 6e 63 |; put in a branc|
00000ae0 68 20 74 6f 20 6f 75 72 20 63 6f 64 65 0a 0a 20 |h to our code.. |
00000af0 20 20 20 20 20 20 20 4d 4f 56 20 20 20 20 20 70 | MOV p|
00000b00 63 2c 20 6c 72 0a 0a 3b 20 2d 2d 2d 2d 2d 2d 2d |c, lr..; -------|
00000b10 2d 2d 2d 2d 2d 2d 2d 2d 2d 2d 2d 2d 2d 2d 2d 2d |----------------|
*
00000b70 2d 2d 0a 0a 73 77 69 5f 70 61 74 63 68 0a 20 20 |--..swi_patch. |
00000b80 20 20 20 20 20 20 53 54 4d 46 44 20 20 20 73 70 | STMFD sp|
00000b90 21 2c 7b 6c 72 7d 0a 20 20 20 20 20 20 20 20 42 |!,{lr}. B|
00000ba0 49 43 20 20 20 20 20 6c 72 2c 20 6c 72 2c 20 23 |IC lr, lr, #|
00000bb0 26 46 43 30 30 30 30 30 33 0a 20 20 20 20 20 20 |&FC000003. |
00000bc0 20 20 4c 44 52 20 20 20 20 20 6c 72 2c 20 5b 6c | LDR lr, [l|
00000bd0 72 2c 23 2d 34 5d 20 20 20 20 20 20 20 20 20 20 |r,#-4] |
00000be0 20 20 20 20 20 20 20 20 20 20 3b 20 67 65 74 20 | ; get |
00000bf0 53 57 49 20 69 6e 73 74 72 75 63 74 69 6f 6e 0a |SWI instruction.|
00000c00 0a 20 20 20 20 20 20 20 20 42 49 43 20 20 20 20 |. BIC |
00000c10 20 6c 72 2c 20 6c 72 2c 20 23 26 46 46 30 30 30 | lr, lr, #&FF000|
00000c20 30 30 30 0a 20 20 20 20 20 20 20 20 42 49 43 20 |000. BIC |
00000c30 20 20 20 20 6c 72 2c 20 6c 72 2c 20 23 26 32 30 | lr, lr, #&20|
00000c40 30 30 30 0a 20 20 20 20 20 20 20 20 53 55 42 20 |000. SUB |
00000c50 20 20 20 20 6c 72 2c 20 6c 72 2c 20 23 26 34 30 | lr, lr, #&40|
00000c60 30 30 30 0a 20 20 20 20 20 20 20 20 43 4d 50 20 |000. CMP |
00000c70 20 20 20 20 6c 72 2c 20 23 26 44 30 20 20 20 20 | lr, #&D0 |
00000c80 20 20 20 20 20 20 20 20 20 20 20 20 20 20 20 20 | |
00000c90 20 20 20 20 3b 20 69 73 20 69 74 20 57 69 6d 70 | ; is it Wimp|
00000ca0 5f 44 72 61 67 42 6f 78 20 3f 0a 0a 20 20 20 20 |_DragBox ?.. |
00000cb0 20 20 20 20 4c 44 4d 4e 45 46 44 20 73 70 21 2c | LDMNEFD sp!,|
00000cc0 20 7b 6c 72 7d 20 20 20 20 20 20 20 20 20 20 20 | {lr} |
00000cd0 20 20 20 20 20 20 20 20 20 20 20 20 3b 20 6f 74 | ; ot|
00000ce0 68 65 72 77 69 73 65 20 64 72 6f 70 20 74 68 72 |herwise drop thr|
00000cf0 6f 75 67 68 20 74 6f 20 53 57 49 20 68 61 6e 64 |ough to SWI hand|
00000d00 6c 65 72 0a 66 69 72 73 74 5f 62 72 61 6e 63 68 |ler.first_branch|
00000d10 0a 20 20 20 20 20 20 20 20 44 43 44 20 20 20 20 |. DCD |
00000d20 20 30 0a 0a 20 20 20 20 20 20 20 20 4c 44 52 20 | 0.. LDR |
00000d30 20 20 20 20 6c 72 2c 20 5b 72 31 2c 23 34 5d 20 | lr, [r1,#4] |
00000d40 20 20 20 20 20 20 20 20 20 20 20 20 20 20 20 20 | |
00000d50 20 20 20 20 3b 20 67 65 74 20 64 72 61 67 20 74 | ; get drag t|
00000d60 79 70 65 0a 20 20 20 20 20 20 20 20 43 4d 50 20 |ype. CMP |
00000d70 20 20 20 20 6c 72 2c 20 23 35 0a 20 20 20 20 20 | lr, #5. |
00000d80 20 20 20 42 45 51 20 20 20 20 20 63 61 6c 6c 62 | BEQ callb|
00000d90 61 63 6b 5f 63 6f 64 65 0a 0a 63 6f 6e 74 69 6e |ack_code..contin|
00000da0 75 65 0a 20 20 20 20 20 20 20 20 4c 44 4d 46 44 |ue. LDMFD|
00000db0 20 73 70 21 2c 20 7b 6c 72 7d 20 20 20 20 20 20 | sp!, {lr} |
00000dc0 20 20 20 20 20 20 20 20 20 20 20 20 20 20 20 20 | |
00000dd0 20 20 20 3b 20 63 61 6c 6c 20 57 69 6d 70 5f 44 | ; call Wimp_D|
00000de0 72 61 67 42 6f 78 20 61 73 20 75 73 75 61 6c 0a |ragBox as usual.|
00000df0 73 65 63 6f 6e 64 5f 62 72 61 6e 63 68 0a 20 20 |second_branch. |
00000e00 20 20 20 20 20 20 44 43 44 20 20 20 20 20 30 0a | DCD 0.|
00000e10 0a 6e 6f 74 5f 73 70 72 69 74 65 0a 20 20 20 20 |.not_sprite. |
00000e20 20 20 20 20 4c 44 4d 46 44 20 20 20 73 70 21 2c | LDMFD sp!,|
00000e30 7b 72 30 2d 72 34 2c 6c 72 7d 0a 20 20 20 20 20 |{r0-r4,lr}. |
00000e40 20 20 20 42 20 20 20 20 20 20 20 63 6f 6e 74 69 | B conti|
00000e50 6e 75 65 0a 0a 77 6f 72 6b 73 70 61 63 65 0a 20 |nue..workspace. |
00000e60 20 20 20 20 20 20 20 25 20 20 20 20 20 20 20 35 | % 5|
00000e70 32 0a 0a 63 61 6c 6c 62 61 63 6b 5f 63 6f 64 65 |2..callback_code|
00000e80 0a 20 20 20 20 20 20 20 20 53 54 4d 46 44 20 20 |. STMFD |
00000e90 20 73 70 21 2c 7b 72 30 2d 72 34 2c 6c 72 7d 0a | sp!,{r0-r4,lr}.|
00000ea0 20 20 20 20 20 20 20 20 4d 4f 56 20 20 20 20 20 | MOV |
00000eb0 72 34 2c 20 72 31 0a 20 20 20 20 20 20 20 20 41 |r4, r1. A|
00000ec0 44 52 20 20 20 20 20 72 31 2c 20 77 6f 72 6b 73 |DR r1, works|
00000ed0 70 61 63 65 0a 20 20 20 20 20 20 20 20 53 57 49 |pace. SWI|
00000ee0 20 20 20 20 20 58 57 69 6d 70 5f 47 65 74 50 6f | XWimp_GetPo|
00000ef0 69 6e 74 65 72 49 6e 66 6f 0a 20 20 20 20 20 20 |interInfo. |
00000f00 20 20 4c 44 52 20 20 20 20 20 72 30 2c 20 5b 72 | LDR r0, [r|
00000f10 31 2c 20 23 31 36 5d 0a 20 20 20 20 20 20 20 20 |1, #16]. |
00000f20 43 4d 50 20 20 20 20 20 72 30 2c 20 23 30 20 20 |CMP r0, #0 |
00000f30 20 20 20 20 20 20 20 20 20 20 20 20 20 20 20 20 | |
00000f40 20 20 20 20 20 20 20 20 3b 20 69 66 20 74 68 65 | ; if the|
00000f50 72 65 27 73 20 6e 6f 20 69 63 6f 6e 20 75 6e 64 |re's no icon und|
00000f60 65 72 20 74 68 65 20 70 6f 69 6e 74 65 72 20 74 |er the pointer t|
00000f70 68 65 6e 0a 20 20 20 20 20 20 20 20 42 4c 54 20 |hen. BLT |
00000f80 20 20 20 20 6e 6f 74 5f 73 70 72 69 74 65 20 20 | not_sprite |
00000f90 20 20 20 20 20 20 20 20 20 20 20 20 20 20 20 20 | |
00000fa0 20 20 20 20 3b 20 64 6f 20 74 68 65 20 75 73 75 | ; do the usu|
00000fb0 61 6c 20 64 72 61 67 20 62 6f 78 0a 0a 20 20 20 |al drag box.. |
00000fc0 20 20 20 20 20 41 44 44 20 20 20 20 20 72 31 2c | ADD r1,|
00000fd0 20 72 31 2c 20 23 31 32 0a 20 20 20 20 20 20 20 | r1, #12. |
00000fe0 20 53 57 49 20 20 20 20 20 58 57 69 6d 70 5f 47 | SWI XWimp_G|
00000ff0 65 74 49 63 6f 6e 53 74 61 74 65 20 20 20 20 20 |etIconState |
00001000 20 20 20 20 20 20 20 20 20 3b 20 67 65 74 20 64 | ; get d|
00001010 61 74 61 20 62 6c 6f 63 6b 20 66 6f 72 20 69 63 |ata block for ic|
00001020 6f 6e 20 75 6e 64 65 72 20 74 68 65 20 70 6f 69 |on under the poi|
00001030 6e 74 65 72 0a 0a 20 20 20 20 20 20 20 20 4c 44 |nter.. LD|
00001040 52 20 20 20 20 20 72 33 2c 20 5b 72 31 2c 20 23 |R r3, [r1, #|
00001050 32 34 5d 0a 20 20 20 20 20 20 20 20 54 53 54 20 |24]. TST |
00001060 20 20 20 20 72 33 2c 20 23 32 20 20 20 20 20 20 | r3, #2 |
00001070 20 20 20 20 20 20 20 20 20 20 20 20 20 20 20 20 | |
00001080 20 20 20 20 3b 20 69 66 20 69 74 27 73 20 6e 6f | ; if it's no|
00001090 74 20 61 20 73 70 72 69 74 65 20 74 68 65 6e 20 |t a sprite then |
000010a0 64 6f 20 6e 6f 74 68 69 6e 67 0a 20 20 20 20 20 |do nothing. |
000010b0 20 20 20 42 45 51 20 20 20 20 20 6e 6f 74 5f 73 | BEQ not_s|
000010c0 70 72 69 74 65 0a 0a 20 20 20 20 20 20 20 20 54 |prite.. T|
000010d0 53 54 20 20 20 20 20 72 33 2c 20 23 32 35 36 20 |ST r3, #256 |
000010e0 20 20 20 20 20 20 20 20 20 20 20 20 20 20 20 20 | |
000010f0 20 20 20 20 20 20 20 3b 20 69 73 20 69 74 20 69 | ; is it i|
00001100 6e 64 69 72 65 63 74 65 64 20 3f 0a 20 20 20 20 |ndirected ?. |
00001110 20 20 20 20 42 4e 45 20 20 20 20 20 69 6e 64 69 | BNE indi|
00001120 72 65 63 74 65 64 0a 0a 20 20 20 20 20 20 20 20 |rected.. |
00001130 41 44 44 20 20 20 20 20 72 32 2c 20 72 31 2c 20 |ADD r2, r1, |
00001140 23 32 38 20 20 20 20 20 20 20 20 20 20 20 20 20 |#28 |
00001150 20 20 20 20 20 20 20 20 3b 20 73 70 72 69 74 65 | ; sprite|
00001160 20 6e 61 6d 65 20 64 69 72 65 63 74 6c 79 20 73 | name directly s|
00001170 70 65 63 69 66 69 65 64 0a 20 20 20 20 20 20 20 |pecified. |
00001180 20 4d 4f 56 20 20 20 20 20 72 31 2c 20 23 31 0a | MOV r1, #1.|
00001190 20 20 20 20 20 20 20 20 42 20 20 20 20 20 20 20 | B |
000011a0 64 6f 5f 64 72 61 67 0a 0a 69 6e 64 69 72 65 63 |do_drag..indirec|
000011b0 74 65 64 0a 20 20 20 20 20 20 20 20 54 53 54 20 |ted. TST |
000011c0 20 20 20 20 72 33 2c 20 23 31 0a 20 20 20 20 20 | r3, #1. |
000011d0 20 20 20 42 4e 45 20 20 20 20 20 74 65 78 74 5f | BNE text_|
000011e0 61 6e 64 5f 73 70 72 69 74 65 0a 20 20 20 20 20 |and_sprite. |
000011f0 20 20 20 4c 44 52 20 20 20 20 20 72 33 2c 20 5b | LDR r3, [|
00001200 72 31 2c 20 23 33 36 5d 20 20 20 20 20 20 20 20 |r1, #36] |
00001210 20 20 20 20 20 20 20 20 20 20 20 3b 20 67 65 74 | ; get|
00001220 20 69 6e 64 69 72 65 63 74 65 64 20 73 70 72 69 | indirected spri|
00001230 74 65 20 6e 61 6d 65 20 6c 65 6e 67 74 68 0a 20 |te name length. |
00001240 20 20 20 20 20 20 20 4c 44 52 20 20 20 20 20 72 | LDR r|
00001250 32 2c 20 5b 72 31 2c 20 23 32 38 5d 0a 20 20 20 |2, [r1, #28]. |
00001260 20 20 20 20 20 4c 44 52 20 20 20 20 20 72 31 2c | LDR r1,|
00001270 20 5b 72 31 2c 20 23 33 32 5d 0a 0a 20 20 20 20 | [r1, #32].. |
00001280 20 20 20 20 43 4d 50 20 20 20 20 20 72 33 2c 20 | CMP r3, |
00001290 23 30 20 20 20 20 20 20 20 20 20 20 20 20 20 20 |#0 |
000012a0 20 20 20 20 20 20 20 20 20 20 20 20 3b 20 69 66 | ; if|
000012b0 20 6c 65 6e 67 74 68 20 3d 20 30 20 74 68 65 6e | length = 0 then|
000012c0 20 72 32 20 70 6f 69 6e 74 73 20 74 6f 20 73 74 | r2 points to st|
000012d0 61 72 74 20 6f 66 20 73 70 72 69 74 65 0a 20 20 |art of sprite. |
000012e0 20 20 20 20 20 20 41 44 44 45 51 20 20 20 72 32 | ADDEQ r2|
000012f0 2c 20 72 32 2c 20 23 34 0a 20 20 20 20 20 20 20 |, r2, #4. |
00001300 20 42 20 20 20 20 20 20 20 64 6f 5f 64 72 61 67 | B do_drag|
00001310 0a 0a 74 65 78 74 5f 61 6e 64 5f 73 70 72 69 74 |..text_and_sprit|
00001320 65 0a 20 20 20 20 20 20 20 20 4c 44 52 20 20 20 |e. LDR |
00001330 20 20 72 32 2c 20 5b 72 31 2c 20 23 33 32 5d 0a | r2, [r1, #32].|
00001340 20 20 20 20 20 20 20 20 0a 66 69 6e 64 5f 73 74 | .find_st|
00001350 61 72 74 0a 20 20 20 20 20 20 20 20 4c 44 52 42 |art. LDRB|
00001360 20 20 20 20 72 33 2c 20 5b 72 32 5d 2c 20 23 31 | r3, [r2], #1|
00001370 20 20 20 20 20 20 20 20 20 20 20 20 20 20 20 20 | |
00001380 20 20 20 20 3b 20 72 61 74 68 65 72 20 73 6c 6f | ; rather slo|
00001390 70 70 79 20 63 6f 64 65 20 74 6f 20 65 78 74 72 |ppy code to extr|
000013a0 61 63 74 20 73 70 72 69 74 65 20 6e 61 6d 65 0a |act sprite name.|
000013b0 20 20 20 20 20 20 20 20 43 4d 50 20 20 20 20 20 | CMP |
000013c0 72 33 2c 20 23 27 53 27 20 20 20 20 20 20 20 20 |r3, #'S' |
000013d0 20 20 20 20 20 20 20 20 20 20 20 20 20 20 20 20 | |
000013e0 3b 20 66 72 6f 6d 20 76 61 6c 69 64 61 74 69 6f |; from validatio|
000013f0 6e 20 73 74 72 69 6e 67 0a 20 20 20 20 20 20 20 |n string. |
00001400 20 43 4d 50 4e 45 20 20 20 72 33 2c 20 23 27 73 | CMPNE r3, #'s|
00001410 27 0a 20 20 20 20 20 20 20 20 42 4e 45 20 20 20 |'. BNE |
00001420 20 20 66 69 6e 64 5f 73 74 61 72 74 0a 20 20 20 | find_start. |
00001430 20 20 20 20 20 4d 4f 56 20 20 20 20 20 72 31 2c | MOV r1,|
00001440 20 23 31 0a 0a 64 6f 5f 64 72 61 67 0a 20 20 20 | #1..do_drag. |
00001450 20 20 20 20 20 4d 4f 56 20 20 20 20 20 72 30 2c | MOV r0,|
00001460 20 23 31 32 38 2b 36 34 2b 33 32 2b 34 2b 31 0a | #128+64+32+4+1.|
00001470 20 20 20 20 20 20 20 20 41 44 44 20 20 20 20 20 | ADD |
00001480 72 33 2c 20 72 34 2c 20 23 38 0a 20 20 20 20 20 |r3, r4, #8. |
00001490 20 20 20 41 44 44 20 20 20 20 20 72 34 2c 20 72 | ADD r4, r|
000014a0 34 2c 20 23 32 34 20 20 20 20 20 20 20 20 0a 20 |4, #24 . |
000014b0 20 20 20 20 20 20 20 53 57 49 20 20 20 20 20 58 | SWI X|
000014c0 44 72 61 67 41 53 70 72 69 74 65 5f 53 74 61 72 |DragASprite_Star|
000014d0 74 0a 20 20 20 20 20 20 20 20 4c 44 4d 56 43 46 |t. LDMVCF|
000014e0 44 20 73 70 21 2c 7b 72 30 2d 72 34 2c 6c 72 2c |D sp!,{r0-r4,lr,|
000014f0 70 63 7d 5e 20 20 20 20 20 20 20 20 20 20 20 20 |pc}^ |
00001500 20 20 3b 20 72 65 74 75 72 6e 20 69 6d 6d 65 64 | ; return immed|
00001510 69 61 74 65 6c 79 20 69 66 20 74 68 65 72 65 27 |iately if there'|
00001520 73 20 6e 6f 20 65 72 72 6f 72 0a 20 20 20 20 20 |s no error. |
00001530 20 20 20 41 44 44 20 20 20 20 20 73 70 2c 20 73 | ADD sp, s|
00001540 70 2c 20 23 34 0a 20 20 20 20 20 20 20 20 4c 44 |p, #4. LD|
00001550 4d 46 44 20 20 20 73 70 21 2c 7b 72 31 2d 72 34 |MFD sp!,{r1-r4|
00001560 2c 6c 72 7d 0a 20 20 20 20 20 20 20 20 4c 44 4d |,lr}. LDM|
00001570 46 44 20 20 20 73 70 21 2c 7b 6c 72 7d 20 20 20 |FD sp!,{lr} |
00001580 20 20 20 20 20 20 20 20 20 20 20 20 20 20 20 20 | |
00001590 20 20 20 20 20 3b 20 6f 74 68 65 72 77 69 73 65 | ; otherwise|
000015a0 20 72 65 74 75 72 6e 20 77 69 74 68 20 56 20 73 | return with V s|
000015b0 65 74 20 61 6e 64 20 65 72 72 6f 72 20 70 6f 69 |et and error poi|
000015c0 6e 74 65 72 20 69 6e 20 72 30 0a 20 20 20 20 20 |nter in r0. |
000015d0 20 20 20 4f 52 52 53 20 20 20 20 70 63 2c 20 6c | ORRS pc, l|
000015e0 72 2c 20 23 56 5f 46 4c 41 47 0a 0a 3b 20 2d 2d |r, #V_FLAG..; --|
000015f0 2d 2d 2d 2d 2d 2d 2d 2d 2d 2d 2d 2d 2d 2d 2d 2d |----------------|
*
00001650 2d 2d 2d 2d 2d 2d 2d 0a 0a 6f 6c 64 5f 62 72 61 |-------..old_bra|
00001660 6e 63 68 20 20 20 20 20 20 44 43 44 20 20 20 20 |nch DCD |
00001670 20 30 20 20 20 20 20 20 20 20 20 20 20 20 20 20 | 0 |
00001680 20 20 20 20 20 20 20 20 20 3b 20 62 72 61 6e 63 | ; branc|
00001690 68 20 74 6f 20 6f 72 69 67 69 6e 61 6c 20 53 57 |h to original SW|
000016a0 49 20 64 65 63 6f 64 65 72 0a 6e 65 77 5f 62 72 |I decoder.new_br|
000016b0 61 6e 63 68 20 20 20 20 20 20 44 43 44 20 20 20 |anch DCD |
000016c0 20 20 30 20 20 20 20 20 20 20 20 20 20 20 20 20 | 0 |
000016d0 20 20 20 20 20 20 20 20 20 20 3b 20 62 72 61 6e | ; bran|
000016e0 63 68 20 74 6f 20 6f 75 72 20 6e 65 77 20 53 57 |ch to our new SW|
000016f0 49 20 64 65 63 6f 64 65 72 20 20 20 20 20 20 20 |I decoder |
00001700 20 20 20 20 20 20 20 20 20 20 20 20 20 20 20 20 | |
00001710 20 20 20 20 20 20 20 20 0a 0a 20 20 20 45 4e 44 | .. END|
00001720 0a |.|
00001721 
.