Home » Archimedes archive » Acorn Computing » 1993 06 Mega Disk.adf » 93_06 » Miscellany/SolidDrag/!SolidDrag/Source/drag_src6
Miscellany/SolidDrag/!SolidDrag/Source/drag_src6
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_src6 |
| Read OK: | ✔ |
| File size: | 1EB9 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
XFilter_RegisterPostFilter EQU &62641
XFilter_DeRegisterPostFilter EQU &62643
Service_Reset EQU &27
Service_NewFilterManager EQU &87
module_base
DCD 0
DCD initialise - module_base
DCD finalise - module_base
DCD service - module_base
DCD title_string - module_base
DCD help_string - module_base
DCD 0
; ---------------------------------------------------------------------------------------------------------
initialise
STMFD sp!, {lr}
BL register_filter
BLVC claim_swi_vector
LDMFD sp!, {pc}
mask
DCD 2_11100001100101110011
register_filter
STMFD sp!,{lr}
ADR r0, title_string
ADR r1, filter_code
MOV r2, #0
MOV r3, #0
STR r3, dragging_flag
LDR r4, mask
SWI XFilter_RegisterPostFilter
LDMFD sp!,{pc}
; ---------------------------------------------------------------------------------------------------------
finalise
STMFD sp!, {lr}
BL release_swi_vector
ADRVC r0, title_string
ADRVC r1, filter_code
MOVVC r2, #0
MOVVC r3, #0
SWIVC XFilter_DeRegisterPostFilter
LDMFD sp!, {pc}^
; ---------------------------------------------------------------------------------------------------------
service
CMP r1, #Service_Reset
CMPNE r1, #Service_NewFilterManager
MOVNES pc, lr
STMFD sp!,{r0-r4,lr}
CMP r1, #Service_Reset
BNE next_service
BL claim_swi_vector
LDMFD sp!,{r0-r4,pc}^
next_service
BL register_filter
LDMFD sp!,{r0-r4,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
LDR r2, old_branch ; if the old branch is already there then do nothing
CMP r1, r2
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
MOVS 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
STRVC r0, dragging_flag
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
dragging_flag DCD 0 ; set when there's a sprite drag in progress
; ---------------------------------------------------------------------------------------------------------
filter_code ; stop the sprite dragging operation
CMP r0, #7
MOVNE pc, lr
STMFD sp!, {lr}
LDR lr, dragging_flag
CMP lr, #0
MOVNE lr, #0
STRNE lr, dragging_flag
SWINE XDragASprite_Stop
LDMFD sp!, {pc}
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 20 |Box |
000000b0 20 20 20 20 20 20 20 45 51 55 20 26 34 30 30 44 | EQU &400D|
000000c0 30 0a 58 57 69 6d 70 5f 44 72 61 67 42 6f 78 20 |0.XWimp_DragBox |
000000d0 20 20 20 20 20 20 20 20 20 20 20 20 20 20 20 20 | |
000000e0 20 20 45 51 55 20 26 36 30 30 44 30 0a 58 57 69 | EQU &600D0.XWi|
000000f0 6d 70 5f 47 65 74 50 6f 69 6e 74 65 72 49 6e 66 |mp_GetPointerInf|
00000100 6f 20 20 20 20 20 20 20 20 20 20 20 20 45 51 55 |o EQU|
00000110 20 26 36 30 30 43 46 0a 58 57 69 6d 70 5f 47 65 | &600CF.XWimp_Ge|
00000120 74 49 63 6f 6e 53 74 61 74 65 20 20 20 20 20 20 |tIconState |
00000130 20 20 20 20 20 20 20 20 45 51 55 20 26 36 30 30 | EQU &600|
00000140 43 45 0a 58 44 72 61 67 41 53 70 72 69 74 65 5f |CE.XDragASprite_|
00000150 53 74 61 72 74 20 20 20 20 20 20 20 20 20 20 20 |Start |
00000160 20 20 20 45 51 55 20 26 36 32 34 30 30 0a 58 44 | EQU &62400.XD|
00000170 72 61 67 41 53 70 72 69 74 65 5f 53 74 6f 70 20 |ragASprite_Stop |
00000180 20 20 20 20 20 20 20 20 20 20 20 20 20 20 45 51 | EQ|
00000190 55 20 26 36 32 34 30 31 0a 58 4f 53 5f 41 64 64 |U &62401.XOS_Add|
000001a0 43 61 6c 6c 42 61 63 6b 20 20 20 20 20 20 20 20 |CallBack |
000001b0 20 20 20 20 20 20 20 20 20 45 51 55 20 26 32 30 | EQU &20|
000001c0 30 35 34 0a 56 5f 46 4c 41 47 20 20 20 20 20 20 |054.V_FLAG |
000001d0 20 20 20 20 20 20 20 20 20 20 20 20 20 20 20 20 | |
000001e0 20 20 20 20 45 51 55 20 31 3a 53 48 4c 3a 32 38 | EQU 1:SHL:28|
000001f0 0a 58 46 69 6c 74 65 72 5f 52 65 67 69 73 74 65 |.XFilter_Registe|
00000200 72 50 6f 73 74 46 69 6c 74 65 72 20 20 20 20 20 |rPostFilter |
00000210 20 45 51 55 20 26 36 32 36 34 31 0a 58 46 69 6c | EQU &62641.XFil|
00000220 74 65 72 5f 44 65 52 65 67 69 73 74 65 72 50 6f |ter_DeRegisterPo|
00000230 73 74 46 69 6c 74 65 72 20 20 20 20 45 51 55 20 |stFilter EQU |
00000240 26 36 32 36 34 33 0a 53 65 72 76 69 63 65 5f 52 |&62643.Service_R|
00000250 65 73 65 74 20 20 20 20 20 20 20 20 20 20 20 20 |eset |
00000260 20 20 20 20 20 20 20 45 51 55 20 26 32 37 0a 53 | EQU &27.S|
00000270 65 72 76 69 63 65 5f 4e 65 77 46 69 6c 74 65 72 |ervice_NewFilter|
00000280 4d 61 6e 61 67 65 72 20 20 20 20 20 20 20 20 45 |Manager E|
00000290 51 55 20 26 38 37 0a 0a 6d 6f 64 75 6c 65 5f 62 |QU &87..module_b|
000002a0 61 73 65 0a 20 20 20 20 20 20 20 20 44 43 44 20 |ase. DCD |
000002b0 20 20 20 20 30 0a 20 20 20 20 20 20 20 20 44 43 | 0. DC|
000002c0 44 20 20 20 20 20 69 6e 69 74 69 61 6c 69 73 65 |D initialise|
000002d0 20 2d 20 6d 6f 64 75 6c 65 5f 62 61 73 65 0a 20 | - module_base. |
000002e0 20 20 20 20 20 20 20 44 43 44 20 20 20 20 20 66 | DCD f|
000002f0 69 6e 61 6c 69 73 65 20 2d 20 6d 6f 64 75 6c 65 |inalise - module|
00000300 5f 62 61 73 65 0a 20 20 20 20 20 20 20 20 44 43 |_base. DC|
00000310 44 20 20 20 20 20 73 65 72 76 69 63 65 20 2d 20 |D service - |
00000320 6d 6f 64 75 6c 65 5f 62 61 73 65 0a 20 20 20 20 |module_base. |
00000330 20 20 20 20 44 43 44 20 20 20 20 20 74 69 74 6c | DCD titl|
00000340 65 5f 73 74 72 69 6e 67 20 2d 20 6d 6f 64 75 6c |e_string - modul|
00000350 65 5f 62 61 73 65 0a 20 20 20 20 20 20 20 20 44 |e_base. D|
00000360 43 44 20 20 20 20 20 68 65 6c 70 5f 73 74 72 69 |CD help_stri|
00000370 6e 67 20 2d 20 6d 6f 64 75 6c 65 5f 62 61 73 65 |ng - module_base|
00000380 0a 20 20 20 20 20 20 20 20 44 43 44 20 20 20 20 |. DCD |
00000390 20 30 0a 0a 0a 3b 20 2d 2d 2d 2d 2d 2d 2d 2d 2d | 0...; ---------|
000003a0 2d 2d 2d 2d 2d 2d 2d 2d 2d 2d 2d 2d 2d 2d 2d 2d |----------------|
*
00000400 0a 0a 69 6e 69 74 69 61 6c 69 73 65 0a 20 20 20 |..initialise. |
00000410 20 20 20 20 20 53 54 4d 46 44 20 20 20 73 70 21 | STMFD sp!|
00000420 2c 20 7b 6c 72 7d 0a 20 20 20 20 20 20 20 20 42 |, {lr}. B|
00000430 4c 20 20 20 20 20 20 72 65 67 69 73 74 65 72 5f |L register_|
00000440 66 69 6c 74 65 72 0a 20 20 20 20 20 20 20 20 42 |filter. B|
00000450 4c 56 43 20 20 20 20 63 6c 61 69 6d 5f 73 77 69 |LVC claim_swi|
00000460 5f 76 65 63 74 6f 72 0a 20 20 20 20 20 20 20 20 |_vector. |
00000470 4c 44 4d 46 44 20 20 20 73 70 21 2c 20 7b 70 63 |LDMFD sp!, {pc|
00000480 7d 0a 0a 6d 61 73 6b 0a 20 20 20 20 20 20 20 20 |}..mask. |
00000490 44 43 44 20 20 20 20 20 32 5f 31 31 31 30 30 30 |DCD 2_111000|
000004a0 30 31 31 30 30 31 30 31 31 31 30 30 31 31 0a 0a |01100101110011..|
000004b0 72 65 67 69 73 74 65 72 5f 66 69 6c 74 65 72 0a |register_filter.|
000004c0 20 20 20 20 20 20 20 20 53 54 4d 46 44 20 20 20 | STMFD |
000004d0 73 70 21 2c 7b 6c 72 7d 0a 20 20 20 20 20 20 20 |sp!,{lr}. |
000004e0 20 41 44 52 20 20 20 20 20 72 30 2c 20 74 69 74 | ADR r0, tit|
000004f0 6c 65 5f 73 74 72 69 6e 67 0a 20 20 20 20 20 20 |le_string. |
00000500 20 20 41 44 52 20 20 20 20 20 72 31 2c 20 66 69 | ADR r1, fi|
00000510 6c 74 65 72 5f 63 6f 64 65 0a 20 20 20 20 20 20 |lter_code. |
00000520 20 20 4d 4f 56 20 20 20 20 20 72 32 2c 20 23 30 | MOV r2, #0|
00000530 0a 20 20 20 20 20 20 20 20 4d 4f 56 20 20 20 20 |. MOV |
00000540 20 72 33 2c 20 23 30 0a 20 20 20 20 20 20 20 20 | r3, #0. |
00000550 53 54 52 20 20 20 20 20 72 33 2c 20 64 72 61 67 |STR r3, drag|
00000560 67 69 6e 67 5f 66 6c 61 67 0a 20 20 20 20 20 20 |ging_flag. |
00000570 20 20 4c 44 52 20 20 20 20 20 72 34 2c 20 6d 61 | LDR r4, ma|
00000580 73 6b 0a 20 20 20 20 20 20 20 20 53 57 49 20 20 |sk. SWI |
00000590 20 20 20 58 46 69 6c 74 65 72 5f 52 65 67 69 73 | XFilter_Regis|
000005a0 74 65 72 50 6f 73 74 46 69 6c 74 65 72 0a 20 20 |terPostFilter. |
000005b0 20 20 20 20 20 20 4c 44 4d 46 44 20 20 20 73 70 | LDMFD sp|
000005c0 21 2c 7b 70 63 7d 0a 0a 0a 0a 3b 20 2d 2d 2d 2d |!,{pc}....; ----|
000005d0 2d 2d 2d 2d 2d 2d 2d 2d 2d 2d 2d 2d 2d 2d 2d 2d |----------------|
*
00000630 2d 2d 2d 2d 2d 0a 0a 66 69 6e 61 6c 69 73 65 0a |-----..finalise.|
00000640 20 20 20 20 20 20 20 20 53 54 4d 46 44 20 20 20 | STMFD |
00000650 73 70 21 2c 20 7b 6c 72 7d 0a 20 20 20 20 20 20 |sp!, {lr}. |
00000660 20 20 42 4c 20 20 20 20 20 20 72 65 6c 65 61 73 | BL releas|
00000670 65 5f 73 77 69 5f 76 65 63 74 6f 72 0a 20 20 20 |e_swi_vector. |
00000680 20 20 20 20 20 41 44 52 56 43 20 20 20 72 30 2c | ADRVC r0,|
00000690 20 74 69 74 6c 65 5f 73 74 72 69 6e 67 0a 20 20 | title_string. |
000006a0 20 20 20 20 20 20 41 44 52 56 43 20 20 20 72 31 | ADRVC r1|
000006b0 2c 20 66 69 6c 74 65 72 5f 63 6f 64 65 0a 20 20 |, filter_code. |
000006c0 20 20 20 20 20 20 4d 4f 56 56 43 20 20 20 72 32 | MOVVC r2|
000006d0 2c 20 23 30 0a 20 20 20 20 20 20 20 20 4d 4f 56 |, #0. MOV|
000006e0 56 43 20 20 20 72 33 2c 20 23 30 0a 20 20 20 20 |VC r3, #0. |
000006f0 20 20 20 20 53 57 49 56 43 20 20 20 58 46 69 6c | SWIVC XFil|
00000700 74 65 72 5f 44 65 52 65 67 69 73 74 65 72 50 6f |ter_DeRegisterPo|
00000710 73 74 46 69 6c 74 65 72 0a 20 20 20 20 20 20 20 |stFilter. |
00000720 20 4c 44 4d 46 44 20 20 20 73 70 21 2c 20 7b 70 | LDMFD sp!, {p|
00000730 63 7d 5e 0a 0a 3b 20 2d 2d 2d 2d 2d 2d 2d 2d 2d |c}^..; ---------|
00000740 2d 2d 2d 2d 2d 2d 2d 2d 2d 2d 2d 2d 2d 2d 2d 2d |----------------|
*
000007a0 0a 0a 73 65 72 76 69 63 65 0a 20 20 20 20 20 20 |..service. |
000007b0 20 20 43 4d 50 20 20 20 20 20 72 31 2c 20 23 53 | CMP r1, #S|
000007c0 65 72 76 69 63 65 5f 52 65 73 65 74 0a 20 20 20 |ervice_Reset. |
000007d0 20 20 20 20 20 43 4d 50 4e 45 20 20 20 72 31 2c | CMPNE r1,|
000007e0 20 23 53 65 72 76 69 63 65 5f 4e 65 77 46 69 6c | #Service_NewFil|
000007f0 74 65 72 4d 61 6e 61 67 65 72 0a 20 20 20 20 20 |terManager. |
00000800 20 20 20 4d 4f 56 4e 45 53 20 20 70 63 2c 20 6c | MOVNES pc, l|
00000810 72 0a 20 20 20 20 20 20 20 20 53 54 4d 46 44 20 |r. STMFD |
00000820 20 20 73 70 21 2c 7b 72 30 2d 72 34 2c 6c 72 7d | sp!,{r0-r4,lr}|
00000830 0a 20 20 20 20 20 20 20 20 43 4d 50 20 20 20 20 |. CMP |
00000840 20 72 31 2c 20 23 53 65 72 76 69 63 65 5f 52 65 | r1, #Service_Re|
00000850 73 65 74 0a 20 20 20 20 20 20 20 20 42 4e 45 20 |set. BNE |
00000860 20 20 20 20 6e 65 78 74 5f 73 65 72 76 69 63 65 | next_service|
00000870 0a 20 20 20 20 20 20 20 20 42 4c 20 20 20 20 20 |. BL |
00000880 20 63 6c 61 69 6d 5f 73 77 69 5f 76 65 63 74 6f | claim_swi_vecto|
00000890 72 0a 20 20 20 20 20 20 20 20 4c 44 4d 46 44 20 |r. LDMFD |
000008a0 20 20 73 70 21 2c 7b 72 30 2d 72 34 2c 70 63 7d | sp!,{r0-r4,pc}|
000008b0 5e 0a 0a 6e 65 78 74 5f 73 65 72 76 69 63 65 0a |^..next_service.|
000008c0 20 20 20 20 20 20 20 20 42 4c 20 20 20 20 20 20 | BL |
000008d0 72 65 67 69 73 74 65 72 5f 66 69 6c 74 65 72 0a |register_filter.|
000008e0 20 20 20 20 20 20 20 20 4c 44 4d 46 44 20 20 20 | LDMFD |
000008f0 73 70 21 2c 7b 72 30 2d 72 34 2c 70 63 7d 5e 0a |sp!,{r0-r4,pc}^.|
00000900 0a 3b 20 2d 2d 2d 2d 2d 2d 2d 2d 2d 2d 2d 2d 2d |.; -------------|
00000910 2d 2d 2d 2d 2d 2d 2d 2d 2d 2d 2d 2d 2d 2d 2d 2d |----------------|
*
00000960 2d 2d 2d 2d 2d 2d 2d 2d 2d 2d 2d 2d 0a 0a 74 69 |------------..ti|
00000970 74 6c 65 5f 73 74 72 69 6e 67 0a 20 20 20 20 20 |tle_string. |
00000980 20 20 20 44 43 42 20 20 20 20 20 22 41 75 74 6f | DCB "Auto|
00000990 44 72 61 67 22 2c 30 0a 0a 68 65 6c 70 5f 73 74 |Drag",0..help_st|
000009a0 72 69 6e 67 0a 20 20 20 20 20 20 20 20 44 43 42 |ring. DCB|
000009b0 20 20 20 20 20 22 41 75 74 6f 44 72 61 67 20 22 | "AutoDrag "|
000009c0 2c 39 2c 22 30 2e 31 30 20 28 30 39 20 53 65 70 |,9,"0.10 (09 Sep|
000009d0 20 31 39 39 32 29 22 2c 30 0a 20 20 20 20 20 20 | 1992)",0. |
000009e0 20 20 41 4c 49 47 4e 0a 0a 3b 20 2d 2d 2d 2d 2d | ALIGN..; -----|
000009f0 2d 2d 2d 2d 2d 2d 2d 2d 2d 2d 2d 2d 2d 2d 2d 2d |----------------|
*
00000a50 2d 2d 2d 2d 0a 0a 72 65 6c 65 61 73 65 5f 73 77 |----..release_sw|
00000a60 69 5f 76 65 63 74 6f 72 0a 20 20 20 20 20 20 20 |i_vector. |
00000a70 20 4d 4f 56 20 20 20 20 20 72 30 2c 20 23 38 0a | MOV r0, #8.|
00000a80 20 20 20 20 20 20 20 20 4c 44 52 20 20 20 20 20 | LDR |
00000a90 72 31 2c 20 5b 72 30 5d 0a 20 20 20 20 20 20 20 |r1, [r0]. |
00000aa0 20 4c 44 52 20 20 20 20 20 72 32 2c 20 6e 65 77 | LDR r2, new|
00000ab0 5f 62 72 61 6e 63 68 20 20 20 20 20 20 20 20 20 |_branch |
00000ac0 20 20 20 20 20 20 20 20 20 3b 20 63 68 65 63 6b | ; check|
00000ad0 20 74 68 61 74 20 6f 75 72 20 53 57 49 20 64 65 | that our SWI de|
00000ae0 63 6f 64 65 72 20 68 61 73 6e 27 74 20 62 65 65 |coder hasn't bee|
00000af0 6e 20 72 65 70 6c 61 63 65 64 0a 20 20 20 20 20 |n replaced. |
00000b00 20 20 20 43 4d 50 20 20 20 20 20 72 31 2c 20 72 | CMP r1, r|
00000b10 32 0a 20 20 20 20 20 20 20 20 4c 44 52 45 51 20 |2. LDREQ |
00000b20 20 20 72 31 2c 20 6f 6c 64 5f 62 72 61 6e 63 68 | r1, old_branch|
00000b30 20 20 20 20 20 20 20 20 20 20 20 20 20 20 20 20 | |
00000b40 20 20 3b 20 72 65 70 6c 61 63 65 20 6f 72 69 67 | ; replace orig|
00000b50 69 6e 61 6c 20 64 65 63 6f 64 65 72 20 69 66 20 |inal decoder if |
00000b60 69 74 20 68 61 73 6e 27 74 0a 20 20 20 20 20 20 |it hasn't. |
00000b70 20 20 53 54 52 45 51 20 20 20 72 31 2c 20 5b 72 | STREQ r1, [r|
00000b80 30 5d 0a 20 20 20 20 20 20 20 20 4d 4f 56 45 51 |0]. MOVEQ|
00000b90 20 20 20 72 30 2c 20 23 30 0a 20 20 20 20 20 20 | r0, #0. |
00000ba0 20 20 53 54 52 45 51 20 20 20 72 31 2c 20 6f 6c | STREQ r1, ol|
00000bb0 64 5f 62 72 61 6e 63 68 0a 20 20 20 20 20 20 20 |d_branch. |
00000bc0 20 4d 4f 56 45 51 53 20 20 70 63 2c 20 6c 72 0a | MOVEQS pc, lr.|
00000bd0 0a 20 20 20 20 20 20 20 20 4c 44 52 20 20 20 20 |. LDR |
00000be0 20 72 32 2c 20 6f 6c 64 5f 62 72 61 6e 63 68 20 | r2, old_branch |
00000bf0 20 20 20 20 20 20 20 20 20 20 20 20 20 20 20 20 | |
00000c00 20 3b 20 69 66 20 74 68 65 20 6f 6c 64 20 62 72 | ; if the old br|
00000c10 61 6e 63 68 20 69 73 20 61 6c 72 65 61 64 79 20 |anch is already |
00000c20 74 68 65 72 65 20 74 68 65 6e 20 64 6f 20 6e 6f |there then do no|
00000c30 74 68 69 6e 67 0a 20 20 20 20 20 20 20 20 43 4d |thing. CM|
00000c40 50 20 20 20 20 20 72 31 2c 20 72 32 0a 20 20 20 |P r1, r2. |
00000c50 20 20 20 20 20 4d 4f 56 45 51 53 20 20 70 63 2c | MOVEQS pc,|
00000c60 20 6c 72 0a 0a 20 20 20 20 20 20 20 20 41 44 52 | lr.. ADR|
00000c70 20 20 20 72 30 2c 20 65 72 72 6f 72 5f 62 6c 6f | r0, error_blo|
00000c80 63 6b 20 20 20 20 20 20 20 20 20 20 20 20 20 20 |ck |
00000c90 20 20 20 20 20 3b 20 6f 74 68 65 72 77 69 73 65 | ; otherwise|
00000ca0 20 72 65 74 75 72 6e 20 61 6e 20 65 72 72 6f 72 | return an error|
00000cb0 0a 20 20 20 20 20 20 20 20 4f 52 52 53 20 20 70 |. ORRS p|
00000cc0 63 2c 20 6c 72 2c 20 23 56 5f 46 4c 41 47 0a 0a |c, lr, #V_FLAG..|
00000cd0 65 72 72 6f 72 5f 62 6c 6f 63 6b 20 20 20 20 20 |error_block |
00000ce0 44 43 44 20 20 20 20 20 26 31 30 33 0a 20 20 20 |DCD &103. |
00000cf0 20 20 20 20 20 20 20 20 20 20 20 20 20 44 43 42 | DCB|
00000d00 20 20 20 20 20 22 43 61 6e 27 74 20 64 65 74 61 | "Can't deta|
00000d10 63 68 20 53 57 49 20 68 61 6e 64 6c 65 72 22 2c |ch SWI handler",|
00000d20 20 30 0a 20 20 20 20 20 20 20 20 20 20 20 20 20 | 0. |
00000d30 20 20 20 41 4c 49 47 4e 0a 0a 3b 20 2d 2d 2d 2d | ALIGN..; ----|
00000d40 2d 2d 2d 2d 2d 2d 2d 2d 2d 2d 2d 2d 2d 2d 2d 2d |----------------|
*
00000da0 2d 2d 2d 2d 2d 0a 0a 63 6c 61 69 6d 5f 73 77 69 |-----..claim_swi|
00000db0 5f 76 65 63 74 6f 72 0a 20 20 20 20 20 20 20 20 |_vector. |
00000dc0 4d 4f 56 20 20 20 20 20 72 30 2c 20 23 38 0a 20 |MOV r0, #8. |
00000dd0 20 20 20 20 20 20 20 4c 44 52 20 20 20 20 20 72 | LDR r|
00000de0 30 2c 20 5b 72 30 5d 20 20 20 20 20 20 20 20 20 |0, [r0] |
00000df0 20 20 20 20 20 20 20 20 20 20 20 20 20 20 20 3b | ;|
00000e00 20 67 65 74 20 62 72 61 6e 63 68 20 74 6f 20 53 | get branch to S|
00000e10 57 49 20 68 61 6e 64 6c 65 72 0a 20 20 20 20 20 |WI handler. |
00000e20 20 20 20 53 54 52 20 20 20 20 20 72 30 2c 20 6f | STR r0, o|
00000e30 6c 64 5f 62 72 61 6e 63 68 0a 0a 20 20 20 20 20 |ld_branch.. |
00000e40 20 20 20 41 44 52 20 20 20 20 20 72 31 2c 20 73 | ADR r1, s|
00000e50 65 63 6f 6e 64 5f 62 72 61 6e 63 68 2d 38 20 20 |econd_branch-8 |
00000e60 20 20 20 20 20 20 20 20 20 20 20 3b 20 69 6e 73 | ; ins|
00000e70 65 72 74 20 69 6e 20 6f 75 72 20 6f 77 6e 20 63 |ert in our own c|
00000e80 6f 64 65 0a 20 20 20 20 20 20 20 20 53 55 42 20 |ode. SUB |
00000e90 20 20 20 20 72 30 2c 20 72 30 2c 20 72 31 2c 20 | r0, r0, r1, |
00000ea0 4c 53 52 20 23 32 0a 20 20 20 20 20 20 20 20 53 |LSR #2. S|
00000eb0 54 52 20 20 20 20 20 72 30 2c 20 73 65 63 6f 6e |TR r0, secon|
00000ec0 64 5f 62 72 61 6e 63 68 0a 0a 20 20 20 20 20 20 |d_branch.. |
00000ed0 20 20 41 44 44 20 20 20 20 20 72 30 2c 20 72 30 | ADD r0, r0|
00000ee0 2c 20 23 28 73 65 63 6f 6e 64 5f 62 72 61 6e 63 |, #(second_branc|
00000ef0 68 2d 66 69 72 73 74 5f 62 72 61 6e 63 68 29 20 |h-first_branch) |
00000f00 2f 20 34 0a 20 20 20 20 20 20 20 20 53 55 42 20 |/ 4. SUB |
00000f10 20 20 20 20 72 30 2c 20 72 30 2c 20 23 26 44 30 | r0, r0, #&D0|
00000f20 30 30 30 30 30 30 0a 20 20 20 20 20 20 20 20 53 |000000. S|
00000f30 54 52 20 20 20 20 20 72 30 2c 20 66 69 72 73 74 |TR r0, first|
00000f40 5f 62 72 61 6e 63 68 20 20 20 20 20 20 20 20 20 |_branch |
00000f50 20 20 20 20 20 20 20 3b 20 63 6f 6e 76 65 72 74 | ; convert|
00000f60 20 74 6f 20 61 20 42 4e 45 0a 0a 20 20 20 20 20 | to a BNE.. |
00000f70 20 20 20 4d 4f 56 20 20 20 20 20 72 31 2c 20 23 | MOV r1, #|
00000f80 38 0a 20 20 20 20 20 20 20 20 41 44 52 20 20 20 |8. ADR |
00000f90 20 20 72 30 2c 20 73 77 69 5f 70 61 74 63 68 2d | r0, swi_patch-|
00000fa0 38 2d 38 0a 20 20 20 20 20 20 20 20 4d 4f 56 20 |8-8. MOV |
00000fb0 20 20 20 20 72 30 2c 20 72 30 2c 20 4c 53 52 20 | r0, r0, LSR |
00000fc0 23 32 0a 20 20 20 20 20 20 20 20 41 44 44 20 20 |#2. ADD |
00000fd0 20 20 20 72 30 2c 20 72 30 2c 20 23 26 45 41 30 | r0, r0, #&EA0|
00000fe0 30 30 30 30 30 0a 20 20 20 20 20 20 20 20 53 54 |00000. ST|
00000ff0 52 20 20 20 20 20 72 30 2c 20 5b 72 31 5d 0a 20 |R r0, [r1]. |
00001000 20 20 20 20 20 20 20 53 54 52 20 20 20 20 20 72 | STR r|
00001010 30 2c 20 6e 65 77 5f 62 72 61 6e 63 68 20 20 20 |0, new_branch |
00001020 20 20 20 20 20 20 20 20 20 20 20 20 20 20 20 3b | ;|
00001030 20 70 75 74 20 69 6e 20 61 20 62 72 61 6e 63 68 | put in a branch|
00001040 20 74 6f 20 6f 75 72 20 63 6f 64 65 0a 0a 20 20 | to our code.. |
00001050 20 20 20 20 20 20 4d 4f 56 53 20 20 20 20 20 70 | MOVS p|
00001060 63 2c 20 6c 72 0a 0a 3b 20 2d 2d 2d 2d 2d 2d 2d |c, lr..; -------|
00001070 2d 2d 2d 2d 2d 2d 2d 2d 2d 2d 2d 2d 2d 2d 2d 2d |----------------|
*
000010d0 2d 2d 0a 0a 73 77 69 5f 70 61 74 63 68 0a 20 20 |--..swi_patch. |
000010e0 20 20 20 20 20 20 53 54 4d 46 44 20 20 20 73 70 | STMFD sp|
000010f0 21 2c 7b 6c 72 7d 0a 20 20 20 20 20 20 20 20 42 |!,{lr}. B|
00001100 49 43 20 20 20 20 20 6c 72 2c 20 6c 72 2c 20 23 |IC lr, lr, #|
00001110 26 46 43 30 30 30 30 30 33 0a 20 20 20 20 20 20 |&FC000003. |
00001120 20 20 4c 44 52 20 20 20 20 20 6c 72 2c 20 5b 6c | LDR lr, [l|
00001130 72 2c 23 2d 34 5d 20 20 20 20 20 20 20 20 20 20 |r,#-4] |
00001140 20 20 20 20 20 20 20 20 20 20 3b 20 67 65 74 20 | ; get |
00001150 53 57 49 20 69 6e 73 74 72 75 63 74 69 6f 6e 0a |SWI instruction.|
00001160 0a 20 20 20 20 20 20 20 20 42 49 43 20 20 20 20 |. BIC |
00001170 20 6c 72 2c 20 6c 72 2c 20 23 26 46 46 30 30 30 | lr, lr, #&FF000|
00001180 30 30 30 0a 20 20 20 20 20 20 20 20 42 49 43 20 |000. BIC |
00001190 20 20 20 20 6c 72 2c 20 6c 72 2c 20 23 26 32 30 | lr, lr, #&20|
000011a0 30 30 30 0a 20 20 20 20 20 20 20 20 53 55 42 20 |000. SUB |
000011b0 20 20 20 20 6c 72 2c 20 6c 72 2c 20 23 26 34 30 | lr, lr, #&40|
000011c0 30 30 30 0a 20 20 20 20 20 20 20 20 43 4d 50 20 |000. CMP |
000011d0 20 20 20 20 6c 72 2c 20 23 26 44 30 20 20 20 20 | lr, #&D0 |
000011e0 20 20 20 20 20 20 20 20 20 20 20 20 20 20 20 20 | |
000011f0 20 20 20 20 3b 20 69 73 20 69 74 20 57 69 6d 70 | ; is it Wimp|
00001200 5f 44 72 61 67 42 6f 78 20 3f 0a 0a 20 20 20 20 |_DragBox ?.. |
00001210 20 20 20 20 4c 44 4d 4e 45 46 44 20 73 70 21 2c | LDMNEFD sp!,|
00001220 20 7b 6c 72 7d 20 20 20 20 20 20 20 20 20 20 20 | {lr} |
00001230 20 20 20 20 20 20 20 20 20 20 20 20 3b 20 6f 74 | ; ot|
00001240 68 65 72 77 69 73 65 20 64 72 6f 70 20 74 68 72 |herwise drop thr|
00001250 6f 75 67 68 20 74 6f 20 53 57 49 20 68 61 6e 64 |ough to SWI hand|
00001260 6c 65 72 0a 66 69 72 73 74 5f 62 72 61 6e 63 68 |ler.first_branch|
00001270 0a 20 20 20 20 20 20 20 20 44 43 44 20 20 20 20 |. DCD |
00001280 20 30 0a 0a 20 20 20 20 20 20 20 20 4c 44 52 20 | 0.. LDR |
00001290 20 20 20 20 6c 72 2c 20 5b 72 31 2c 23 34 5d 20 | lr, [r1,#4] |
000012a0 20 20 20 20 20 20 20 20 20 20 20 20 20 20 20 20 | |
000012b0 20 20 20 20 3b 20 67 65 74 20 64 72 61 67 20 74 | ; get drag t|
000012c0 79 70 65 0a 20 20 20 20 20 20 20 20 43 4d 50 20 |ype. CMP |
000012d0 20 20 20 20 6c 72 2c 20 23 35 0a 20 20 20 20 20 | lr, #5. |
000012e0 20 20 20 42 45 51 20 20 20 20 20 63 61 6c 6c 62 | BEQ callb|
000012f0 61 63 6b 5f 63 6f 64 65 0a 0a 63 6f 6e 74 69 6e |ack_code..contin|
00001300 75 65 0a 20 20 20 20 20 20 20 20 4c 44 4d 46 44 |ue. LDMFD|
00001310 20 73 70 21 2c 20 7b 6c 72 7d 20 20 20 20 20 20 | sp!, {lr} |
00001320 20 20 20 20 20 20 20 20 20 20 20 20 20 20 20 20 | |
00001330 20 20 20 3b 20 63 61 6c 6c 20 57 69 6d 70 5f 44 | ; call Wimp_D|
00001340 72 61 67 42 6f 78 20 61 73 20 75 73 75 61 6c 0a |ragBox as usual.|
00001350 73 65 63 6f 6e 64 5f 62 72 61 6e 63 68 0a 20 20 |second_branch. |
00001360 20 20 20 20 20 20 44 43 44 20 20 20 20 20 30 0a | DCD 0.|
00001370 0a 6e 6f 74 5f 73 70 72 69 74 65 0a 20 20 20 20 |.not_sprite. |
00001380 20 20 20 20 4c 44 4d 46 44 20 20 20 73 70 21 2c | LDMFD sp!,|
00001390 7b 72 30 2d 72 34 2c 6c 72 7d 0a 20 20 20 20 20 |{r0-r4,lr}. |
000013a0 20 20 20 42 20 20 20 20 20 20 20 63 6f 6e 74 69 | B conti|
000013b0 6e 75 65 0a 0a 77 6f 72 6b 73 70 61 63 65 0a 20 |nue..workspace. |
000013c0 20 20 20 20 20 20 20 25 20 20 20 20 20 20 20 35 | % 5|
000013d0 32 0a 0a 63 61 6c 6c 62 61 63 6b 5f 63 6f 64 65 |2..callback_code|
000013e0 0a 20 20 20 20 20 20 20 20 53 54 4d 46 44 20 20 |. STMFD |
000013f0 20 73 70 21 2c 7b 72 30 2d 72 34 2c 6c 72 7d 0a | sp!,{r0-r4,lr}.|
00001400 20 20 20 20 20 20 20 20 4d 4f 56 20 20 20 20 20 | MOV |
00001410 72 34 2c 20 72 31 0a 20 20 20 20 20 20 20 20 41 |r4, r1. A|
00001420 44 52 20 20 20 20 20 72 31 2c 20 77 6f 72 6b 73 |DR r1, works|
00001430 70 61 63 65 0a 20 20 20 20 20 20 20 20 53 57 49 |pace. SWI|
00001440 20 20 20 20 20 58 57 69 6d 70 5f 47 65 74 50 6f | XWimp_GetPo|
00001450 69 6e 74 65 72 49 6e 66 6f 0a 20 20 20 20 20 20 |interInfo. |
00001460 20 20 4c 44 52 20 20 20 20 20 72 30 2c 20 5b 72 | LDR r0, [r|
00001470 31 2c 20 23 31 36 5d 0a 20 20 20 20 20 20 20 20 |1, #16]. |
00001480 43 4d 50 20 20 20 20 20 72 30 2c 20 23 30 20 20 |CMP r0, #0 |
00001490 20 20 20 20 20 20 20 20 20 20 20 20 20 20 20 20 | |
000014a0 20 20 20 20 20 20 20 20 3b 20 69 66 20 74 68 65 | ; if the|
000014b0 72 65 27 73 20 6e 6f 20 69 63 6f 6e 20 75 6e 64 |re's no icon und|
000014c0 65 72 20 74 68 65 20 70 6f 69 6e 74 65 72 20 74 |er the pointer t|
000014d0 68 65 6e 0a 20 20 20 20 20 20 20 20 42 4c 54 20 |hen. BLT |
000014e0 20 20 20 20 6e 6f 74 5f 73 70 72 69 74 65 20 20 | not_sprite |
000014f0 20 20 20 20 20 20 20 20 20 20 20 20 20 20 20 20 | |
00001500 20 20 20 20 3b 20 64 6f 20 74 68 65 20 75 73 75 | ; do the usu|
00001510 61 6c 20 64 72 61 67 20 62 6f 78 0a 0a 20 20 20 |al drag box.. |
00001520 20 20 20 20 20 41 44 44 20 20 20 20 20 72 31 2c | ADD r1,|
00001530 20 72 31 2c 20 23 31 32 0a 20 20 20 20 20 20 20 | r1, #12. |
00001540 20 53 57 49 20 20 20 20 20 58 57 69 6d 70 5f 47 | SWI XWimp_G|
00001550 65 74 49 63 6f 6e 53 74 61 74 65 20 20 20 20 20 |etIconState |
00001560 20 20 20 20 20 20 20 20 20 3b 20 67 65 74 20 64 | ; get d|
00001570 61 74 61 20 62 6c 6f 63 6b 20 66 6f 72 20 69 63 |ata block for ic|
00001580 6f 6e 20 75 6e 64 65 72 20 74 68 65 20 70 6f 69 |on under the poi|
00001590 6e 74 65 72 0a 0a 20 20 20 20 20 20 20 20 4c 44 |nter.. LD|
000015a0 52 20 20 20 20 20 72 33 2c 20 5b 72 31 2c 20 23 |R r3, [r1, #|
000015b0 32 34 5d 0a 20 20 20 20 20 20 20 20 54 53 54 20 |24]. TST |
000015c0 20 20 20 20 72 33 2c 20 23 32 20 20 20 20 20 20 | r3, #2 |
000015d0 20 20 20 20 20 20 20 20 20 20 20 20 20 20 20 20 | |
000015e0 20 20 20 20 3b 20 69 66 20 69 74 27 73 20 6e 6f | ; if it's no|
000015f0 74 20 61 20 73 70 72 69 74 65 20 74 68 65 6e 20 |t a sprite then |
00001600 64 6f 20 6e 6f 74 68 69 6e 67 0a 20 20 20 20 20 |do nothing. |
00001610 20 20 20 42 45 51 20 20 20 20 20 6e 6f 74 5f 73 | BEQ not_s|
00001620 70 72 69 74 65 0a 0a 20 20 20 20 20 20 20 20 54 |prite.. T|
00001630 53 54 20 20 20 20 20 72 33 2c 20 23 32 35 36 20 |ST r3, #256 |
00001640 20 20 20 20 20 20 20 20 20 20 20 20 20 20 20 20 | |
00001650 20 20 20 20 20 20 20 3b 20 69 73 20 69 74 20 69 | ; is it i|
00001660 6e 64 69 72 65 63 74 65 64 20 3f 0a 20 20 20 20 |ndirected ?. |
00001670 20 20 20 20 42 4e 45 20 20 20 20 20 69 6e 64 69 | BNE indi|
00001680 72 65 63 74 65 64 0a 0a 20 20 20 20 20 20 20 20 |rected.. |
00001690 41 44 44 20 20 20 20 20 72 32 2c 20 72 31 2c 20 |ADD r2, r1, |
000016a0 23 32 38 20 20 20 20 20 20 20 20 20 20 20 20 20 |#28 |
000016b0 20 20 20 20 20 20 20 20 3b 20 73 70 72 69 74 65 | ; sprite|
000016c0 20 6e 61 6d 65 20 64 69 72 65 63 74 6c 79 20 73 | name directly s|
000016d0 70 65 63 69 66 69 65 64 0a 20 20 20 20 20 20 20 |pecified. |
000016e0 20 4d 4f 56 20 20 20 20 20 72 31 2c 20 23 31 0a | MOV r1, #1.|
000016f0 20 20 20 20 20 20 20 20 42 20 20 20 20 20 20 20 | B |
00001700 64 6f 5f 64 72 61 67 0a 0a 69 6e 64 69 72 65 63 |do_drag..indirec|
00001710 74 65 64 0a 20 20 20 20 20 20 20 20 54 53 54 20 |ted. TST |
00001720 20 20 20 20 72 33 2c 20 23 31 0a 20 20 20 20 20 | r3, #1. |
00001730 20 20 20 42 4e 45 20 20 20 20 20 74 65 78 74 5f | BNE text_|
00001740 61 6e 64 5f 73 70 72 69 74 65 0a 20 20 20 20 20 |and_sprite. |
00001750 20 20 20 4c 44 52 20 20 20 20 20 72 33 2c 20 5b | LDR r3, [|
00001760 72 31 2c 20 23 33 36 5d 20 20 20 20 20 20 20 20 |r1, #36] |
00001770 20 20 20 20 20 20 20 20 20 20 20 3b 20 67 65 74 | ; get|
00001780 20 69 6e 64 69 72 65 63 74 65 64 20 73 70 72 69 | indirected spri|
00001790 74 65 20 6e 61 6d 65 20 6c 65 6e 67 74 68 0a 20 |te name length. |
000017a0 20 20 20 20 20 20 20 4c 44 52 20 20 20 20 20 72 | LDR r|
000017b0 32 2c 20 5b 72 31 2c 20 23 32 38 5d 0a 20 20 20 |2, [r1, #28]. |
000017c0 20 20 20 20 20 4c 44 52 20 20 20 20 20 72 31 2c | LDR r1,|
000017d0 20 5b 72 31 2c 20 23 33 32 5d 0a 0a 20 20 20 20 | [r1, #32].. |
000017e0 20 20 20 20 43 4d 50 20 20 20 20 20 72 33 2c 20 | CMP r3, |
000017f0 23 30 20 20 20 20 20 20 20 20 20 20 20 20 20 20 |#0 |
00001800 20 20 20 20 20 20 20 20 20 20 20 20 3b 20 69 66 | ; if|
00001810 20 6c 65 6e 67 74 68 20 3d 20 30 20 74 68 65 6e | length = 0 then|
00001820 20 72 32 20 70 6f 69 6e 74 73 20 74 6f 20 73 74 | r2 points to st|
00001830 61 72 74 20 6f 66 20 73 70 72 69 74 65 0a 20 20 |art of sprite. |
00001840 20 20 20 20 20 20 41 44 44 45 51 20 20 20 72 32 | ADDEQ r2|
00001850 2c 20 72 32 2c 20 23 34 0a 20 20 20 20 20 20 20 |, r2, #4. |
00001860 20 42 20 20 20 20 20 20 20 64 6f 5f 64 72 61 67 | B do_drag|
00001870 0a 0a 74 65 78 74 5f 61 6e 64 5f 73 70 72 69 74 |..text_and_sprit|
00001880 65 0a 20 20 20 20 20 20 20 20 4c 44 52 20 20 20 |e. LDR |
00001890 20 20 72 32 2c 20 5b 72 31 2c 20 23 33 32 5d 0a | r2, [r1, #32].|
000018a0 20 20 20 20 20 20 20 20 0a 66 69 6e 64 5f 73 74 | .find_st|
000018b0 61 72 74 0a 20 20 20 20 20 20 20 20 4c 44 52 42 |art. LDRB|
000018c0 20 20 20 20 72 33 2c 20 5b 72 32 5d 2c 20 23 31 | r3, [r2], #1|
000018d0 20 20 20 20 20 20 20 20 20 20 20 20 20 20 20 20 | |
000018e0 20 20 20 20 3b 20 72 61 74 68 65 72 20 73 6c 6f | ; rather slo|
000018f0 70 70 79 20 63 6f 64 65 20 74 6f 20 65 78 74 72 |ppy code to extr|
00001900 61 63 74 20 73 70 72 69 74 65 20 6e 61 6d 65 0a |act sprite name.|
00001910 20 20 20 20 20 20 20 20 43 4d 50 20 20 20 20 20 | CMP |
00001920 72 33 2c 20 23 27 53 27 20 20 20 20 20 20 20 20 |r3, #'S' |
00001930 20 20 20 20 20 20 20 20 20 20 20 20 20 20 20 20 | |
00001940 3b 20 66 72 6f 6d 20 76 61 6c 69 64 61 74 69 6f |; from validatio|
00001950 6e 20 73 74 72 69 6e 67 0a 20 20 20 20 20 20 20 |n string. |
00001960 20 43 4d 50 4e 45 20 20 20 72 33 2c 20 23 27 73 | CMPNE r3, #'s|
00001970 27 0a 20 20 20 20 20 20 20 20 42 4e 45 20 20 20 |'. BNE |
00001980 20 20 66 69 6e 64 5f 73 74 61 72 74 0a 20 20 20 | find_start. |
00001990 20 20 20 20 20 4d 4f 56 20 20 20 20 20 72 31 2c | MOV r1,|
000019a0 20 23 31 0a 0a 64 6f 5f 64 72 61 67 0a 20 20 20 | #1..do_drag. |
000019b0 20 20 20 20 20 4d 4f 56 20 20 20 20 20 72 30 2c | MOV r0,|
000019c0 20 23 31 32 38 2b 36 34 2b 33 32 2b 34 2b 31 0a | #128+64+32+4+1.|
000019d0 20 20 20 20 20 20 20 20 41 44 44 20 20 20 20 20 | ADD |
000019e0 72 33 2c 20 72 34 2c 20 23 38 0a 20 20 20 20 20 |r3, r4, #8. |
000019f0 20 20 20 41 44 44 20 20 20 20 20 72 34 2c 20 72 | ADD r4, r|
00001a00 34 2c 20 23 32 34 20 20 20 20 20 20 20 20 0a 20 |4, #24 . |
00001a10 20 20 20 20 20 20 20 53 57 49 20 20 20 20 20 58 | SWI X|
00001a20 44 72 61 67 41 53 70 72 69 74 65 5f 53 74 61 72 |DragASprite_Star|
00001a30 74 0a 20 20 20 20 20 20 20 20 53 54 52 56 43 20 |t. STRVC |
00001a40 20 20 72 30 2c 20 64 72 61 67 67 69 6e 67 5f 66 | r0, dragging_f|
00001a50 6c 61 67 0a 20 20 20 20 20 20 20 20 4c 44 4d 56 |lag. LDMV|
00001a60 43 46 44 20 73 70 21 2c 7b 72 30 2d 72 34 2c 6c |CFD sp!,{r0-r4,l|
00001a70 72 2c 70 63 7d 5e 20 20 20 20 20 20 20 20 20 20 |r,pc}^ |
00001a80 20 20 20 20 3b 20 72 65 74 75 72 6e 20 69 6d 6d | ; return imm|
00001a90 65 64 69 61 74 65 6c 79 20 69 66 20 74 68 65 72 |ediately if ther|
00001aa0 65 27 73 20 6e 6f 20 65 72 72 6f 72 0a 20 20 20 |e's no error. |
00001ab0 20 20 20 20 20 41 44 44 20 20 20 20 20 73 70 2c | ADD sp,|
00001ac0 20 73 70 2c 20 23 34 0a 20 20 20 20 20 20 20 20 | sp, #4. |
00001ad0 4c 44 4d 46 44 20 20 20 73 70 21 2c 7b 72 31 2d |LDMFD sp!,{r1-|
00001ae0 72 34 2c 6c 72 7d 0a 20 20 20 20 20 20 20 20 4c |r4,lr}. L|
00001af0 44 4d 46 44 20 20 20 73 70 21 2c 7b 6c 72 7d 20 |DMFD sp!,{lr} |
00001b00 20 20 20 20 20 20 20 20 20 20 20 20 20 20 20 20 | |
00001b10 20 20 20 20 20 20 20 3b 20 6f 74 68 65 72 77 69 | ; otherwi|
00001b20 73 65 20 72 65 74 75 72 6e 20 77 69 74 68 20 56 |se return with V|
00001b30 20 73 65 74 20 61 6e 64 20 65 72 72 6f 72 20 70 | set and error p|
00001b40 6f 69 6e 74 65 72 20 69 6e 20 72 30 0a 20 20 20 |ointer in r0. |
00001b50 20 20 20 20 20 4f 52 52 53 20 20 20 20 70 63 2c | ORRS pc,|
00001b60 20 6c 72 2c 20 23 56 5f 46 4c 41 47 0a 0a 3b 20 | lr, #V_FLAG..; |
00001b70 2d 2d 2d 2d 2d 2d 2d 2d 2d 2d 2d 2d 2d 2d 2d 2d |----------------|
*
00001bd0 2d 2d 2d 2d 2d 2d 2d 2d 2d 0a 0a 6f 6c 64 5f 62 |---------..old_b|
00001be0 72 61 6e 63 68 20 20 20 20 20 20 44 43 44 20 20 |ranch DCD |
00001bf0 20 20 20 30 20 20 20 20 20 20 20 20 20 20 20 20 | 0 |
00001c00 20 20 20 20 20 20 20 20 20 20 20 3b 20 62 72 61 | ; bra|
00001c10 6e 63 68 20 74 6f 20 6f 72 69 67 69 6e 61 6c 20 |nch to original |
00001c20 53 57 49 20 64 65 63 6f 64 65 72 0a 6e 65 77 5f |SWI decoder.new_|
00001c30 62 72 61 6e 63 68 20 20 20 20 20 20 44 43 44 20 |branch DCD |
00001c40 20 20 20 20 30 20 20 20 20 20 20 20 20 20 20 20 | 0 |
00001c50 20 20 20 20 20 20 20 20 20 20 20 20 3b 20 62 72 | ; br|
00001c60 61 6e 63 68 20 74 6f 20 6f 75 72 20 6e 65 77 20 |anch to our new |
00001c70 53 57 49 20 64 65 63 6f 64 65 72 20 20 20 20 20 |SWI decoder |
00001c80 20 20 20 20 20 20 20 20 20 20 20 20 20 20 20 20 | |
00001c90 20 20 20 20 20 20 20 20 20 20 0a 64 72 61 67 67 | .dragg|
00001ca0 69 6e 67 5f 66 6c 61 67 20 20 20 44 43 44 20 20 |ing_flag DCD |
00001cb0 20 20 20 30 20 20 20 20 20 20 20 20 20 20 20 20 | 0 |
00001cc0 20 20 20 20 20 20 20 20 20 20 20 3b 20 73 65 74 | ; set|
00001cd0 20 77 68 65 6e 20 74 68 65 72 65 27 73 20 61 20 | when there's a |
00001ce0 73 70 72 69 74 65 20 64 72 61 67 20 69 6e 20 70 |sprite drag in p|
00001cf0 72 6f 67 72 65 73 73 0a 0a 3b 20 2d 2d 2d 2d 2d |rogress..; -----|
00001d00 2d 2d 2d 2d 2d 2d 2d 2d 2d 2d 2d 2d 2d 2d 2d 2d |----------------|
*
00001d60 2d 2d 2d 2d 0a 0a 66 69 6c 74 65 72 5f 63 6f 64 |----..filter_cod|
00001d70 65 20 20 20 20 20 20 20 20 20 20 20 20 20 20 20 |e |
00001d80 20 20 20 20 20 20 20 20 20 20 20 20 20 20 20 20 | |
00001d90 20 20 20 20 20 20 3b 20 73 74 6f 70 20 74 68 65 | ; stop the|
00001da0 20 73 70 72 69 74 65 20 64 72 61 67 67 69 6e 67 | sprite dragging|
00001db0 20 6f 70 65 72 61 74 69 6f 6e 0a 20 20 20 20 20 | operation. |
00001dc0 20 20 20 43 4d 50 20 20 20 20 20 72 30 2c 20 23 | CMP r0, #|
00001dd0 37 0a 20 20 20 20 20 20 20 20 4d 4f 56 4e 45 20 |7. MOVNE |
00001de0 20 20 70 63 2c 20 6c 72 0a 20 20 20 20 20 20 20 | pc, lr. |
00001df0 20 53 54 4d 46 44 20 20 20 73 70 21 2c 20 7b 6c | STMFD sp!, {l|
00001e00 72 7d 0a 20 20 20 20 20 20 20 20 4c 44 52 20 20 |r}. LDR |
00001e10 20 20 20 6c 72 2c 20 64 72 61 67 67 69 6e 67 5f | lr, dragging_|
00001e20 66 6c 61 67 0a 20 20 20 20 20 20 20 20 43 4d 50 |flag. CMP|
00001e30 20 20 20 20 20 6c 72 2c 20 23 30 0a 20 20 20 20 | lr, #0. |
00001e40 20 20 20 20 4d 4f 56 4e 45 20 20 20 6c 72 2c 20 | MOVNE lr, |
00001e50 23 30 0a 20 20 20 20 20 20 20 20 53 54 52 4e 45 |#0. STRNE|
00001e60 20 20 20 6c 72 2c 20 64 72 61 67 67 69 6e 67 5f | lr, dragging_|
00001e70 66 6c 61 67 0a 20 20 20 20 20 20 20 20 53 57 49 |flag. SWI|
00001e80 4e 45 20 20 20 58 44 72 61 67 41 53 70 72 69 74 |NE XDragASprit|
00001e90 65 5f 53 74 6f 70 0a 20 20 20 20 20 20 20 20 4c |e_Stop. L|
00001ea0 44 4d 46 44 20 20 20 73 70 21 2c 20 7b 70 63 7d |DMFD sp!, {pc}|
00001eb0 0a 0a 20 20 20 45 4e 44 0a |.. END.|
00001eb9 
.