Home » Archimedes archive » Acorn User » AU 1994-06.adf » !WriteDemo_WriteDemo » Modules/Water/Source
Modules/Water/Source
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 User » AU 1994-06.adf » !WriteDemo_WriteDemo |
| Filename: | Modules/Water/Source |
| Read OK: | ✔ |
| File size: | 1CB2 bytes |
| Load address: | 0000 |
| Exec address: | 0000 |
Duplicates
There is 1 duplicate copy of this file in the archive:
- Archimedes archive » Acorn User » AU 1994-06.adf » !WriteDemo_WriteDemo » Modules/Water/Source
- Archimedes archive » Acorn User » AU 1994-05.adf » !WriteDemo_WriteDemo » Modules/Water/Source
File contents
10REM >Water
20
30ON ERROR SYS "Hourglass_Smash":ERROR 0,(REPORT$+" (internal error code "+STR$(ERL)+")")
40
50REM Fixed variables :
60
70 REM Note : h%*2 cannot be >top% !
80
90 trigger$ = "z"
100 trigger% = TRUE
110
120 REM y position of water in pixels
130 y% = 170
140
150 REM start y position of water in pixels
160 start_y% = 255
170
180 REM height of water in pixels (approx)
190 h% = (y%/2)
200
210 REM byte=byte OR orr%, for every pixel reflected.
220 REM in the format BGgRbrtT where :
230 REM R = high red bit, r = low red bit
240 REM G = high green bit, g = low green bit
250 REM B = high blue bit, b = low blue bit
260 REM T = high tint bit, t = low tint bit
270 orr% = %10001000
280
290
300
310module$ = "Water"
320
330SYS "Hourglass_On"
340PROCassemble
350PROCinit
360
370OSCLI"SAVE <Modules$Dir>."+module$+".Module "+STR$~code%+" "+STR$~P%
380OSCLI"SETTYPE <Modules$Dir>."+module$+".Module Data"
390
400SYS "Hourglass_Off"
410END
420
430
440
450DEF PROCassemble
460 len% = 1024 * 2
470 DIM code% len%
480 FOR pass% = 8 TO 10 STEP 2
490 P% = code%
500 L% = code% + len%
510 [OPT pass%
520
530
540.init EQUD 0
550.frame EQUD wave - code%
560.end EQUD 0
570
580
590
600.wave STMFD R13!,{R0-R11,R14}
610 ]
620 IF trigger% THEN
630 [OPT pass%
640 TST R11,#( 1 << (ASC("z") - ASC(trigger$)) )
650 BEQ wave_end
660 ]
670 ENDIF
680 [OPT pass%
690
700
710 LDR R0,var%
720 CMP R0,#y%
730 SUBGT R0,R0,#1
740 STR R0,var%
750 MOV R1,R0,LSL#6
760 ADD R1,R1,R0,LSL#8
770 STR R1,offset% ; store scr_offset in offset%
780 STR R12,screen% ; store scr_address in screen%
790 ADD R0,R12,#(320*256) ; r0=screen+((bottom+1)*320)
800 STR R0,max_scr% ; store r0 in max_scr%
810 LDR R11,offset% ; r11=screen_offset
820
830 MOV R2,R0 ; r2=maximum screen address
840 ADD R0,R1,R12 ; r0=scr_offset+scr_addr
850 MOV R3,#0 ; r3=black word
860.word_loop STR R3,[R0],#320 ; put word at left of line
870 CMP R0,R2 ; is scr_addr < max_addr ?
880 BLT word_loop ; if so, go to 'world_loop'
890
900 ADD R1,R12,R11 ; r1=screen+screen_offset
910 STR R1,water_pos% ; store r1 in water_pos%
920 SUB R0,R1,#320 ; r0=addr of reflection
930 MOV R2,#h% ; r2=number of rows of water
940 LDR R11,wave_pos% ; r11=position in wave table
950 ADD R12,R11,#4 ; increment position by 4
960 CMP R12,#(h%*4) ; if it has exceeded table,
970 MOVEQ R12,#0 ; then reset it to zero
980 STR R12,wave_pos% ; store position in wave table
990 ADR R12,table% ; r12=addr of wave data table
1000 ADR R14,perspect% ; r14=perspective table addr
1010
1020 B wave_1 ; go to 'wave_1'
1030
1040.table% FNarray(4*h%) ; water motion offsets table
1050.perspect% FNarray(4*h%) ; perspective factors table
1060
1070.wave_1 LDR R4,[R12,R11] ; r4=wave height
1080 SUBS R11,R11,#4 ; move wave height pointer
1090 MOVMI R11,#((h%-1)*4)
1100 LDR R5,[R14],#4 ; get perspective factor
1110 CMP R5,#0 ; is it zero ?
1120 BEQ zero ; if so, go to 'zero'
1130 MUL R6,R4,R5 ; r6=wave_height*perspective
1140 MOV R6,R6,ASR#20 ; r6=r6>>>20
1150 CMP R6,#0 ; is wave_height (r6) <0
1160 ADDLT R6,R6,#1 ; if so, r6=r6+1
1170 LDR R1,water_pos% ; r1=screen offset for water
1180 ADD R1,R1,R6,LSL#6 ; r1=r1+(wave_height*320)
1190 ADD R1,R1,R6,LSL#8
1200 LDR R3,max_scr% ; r3=maximum screen address
1210 CMP R1,R3 ; does r1 exceed this ?
1220 BGE exit ; if so, exit
1230 B skip ; go to 'skip'
1240
1250.zero LDR R1,offset% ; when wave_height=0
1260 LDR R3,screen%
1270 ADD R1,R1,R3 ; r1=screen_address+offset
1280
1290.skip STR R11,temp_wave% ; store wave table pointer
1300 LDR R11,orr_word% ; r11=byte ORing word
1310
1320 ]
1330 FOR loop% = 1 TO 10
1340 [OPT pass%
1350
1360 LDMIA R0!,{R3-R10} ; get screen data
1370 ORR R3,R3,R11 ; set blue bits in words
1380 ORR R4,R4,R11
1390 ORR R5,R5,R11
1400 ORR R6,R6,R11
1410 ORR R7,R7,R11
1420 ORR R8,R8,R11
1430 ORR R9,R9,R11
1440 ORR R10,R10,R11
1450 STMIA R1!,{R3-R10} ; plot reflection
1460
1470 ]
1480 NEXT
1490 [OPT pass%
1500
1510 LDR R11,temp_wave% ; get wave pointer back
1520 SUB R0,R0,#960 ; screen_position-=3 lines
1530 LDR R1,water_pos% ; r1=water_position
1540 ADD R1,R1,#320 ; add offset to next line
1550 STR R1,water_pos% ; store water_position
1560 SUBS R2,R2,#1 ; another line ?
1570 BNE wave_1 ; if so, go to 'wave_1'
1580
1590.exit LDR R12,screen% ; r12=screen address
1600 LDR R0,offset% ; r0=water address offset
1610 ADD R0,R0,R12 ; r0=r0+r12
1620 LDR R2,max_scr% ; r2=maximum screen address
1630.fill_loop LDR R3,[R0] ; get word at left of line
1640 CMP R3,#0 ; is it black (an empty line)
1650 BNE move_fill ; if not, go to 'move_fill'
1660 SUB R1,R0,#320 ; r1=address of line to copy
1670
1680 ]
1690 FOR loop% = 1 TO 10
1700 [OPT pass%
1710
1720 LDMIA R1!,{R3-R10} ; get data of line above
1730 STMIA R0!,{R3-R10} ; store it in empty line
1740
1750 ]
1760 NEXT
1770 [OPT pass%
1780
1790 B end_fill ; jump to 'end_fill'
1800.move_fill ADD R0,R0,#320 ; if not black goto next line
1810.end_fill CMP R0,R2 ; is scr_addr < max_addr ?
1820 BLT fill_loop ; if so, go to 'fill_loop'
1830
1840.wave_end LDMFD R13!,{R0-R11,PC} ; exit
1850
1860
1870.var% EQUD start_y%
1880.water_pos% EQUD 0
1890.temp_wave% EQUD 0
1900.screen% EQUD 0
1910.offset% EQUD y%*320
1920.max_scr% EQUD 0
1930.wave_pos% EQUD 0
1940.orr_word% EQUD orr% + (orr%*1<<8) + (orr%*1<<16) + (orr%*1<<24)
1950
1960
1970 ]
1980 NEXT
1990ENDPROC
2000
2010
2020
2030DEF FNarray(size%)
2040 P% += size%
2050= 0
2060
2070
2080
2090DEF PROCinit
2100 LOCAL I%
2110
2120 FOR I% = 0 TO (h% - 1)
2130 table%!(I%*4) = (h%/10) * SINRAD(I% * (360/(h%/2)) )
2140 NEXT
2150
2160 FOR I% = 0 TO (h% - 1)
2170 perspect%!(I%*4) = (I% / (h%-1)) * (1 << 20)
2180 NEXT
2190
2200ENDPROC
� >Water
G� � ș "Hourglass_Smash":� 0,(�$+" (internal error code "+�(�)+")")
(
2� Fixed variables :
<
F% � Note : h%*2 cannot be >top% !
P
Z trigger$ = "z"
d trigger% = �
n
x% � y position of water in pixels
� y% = 170
�
�, � start y position of water in pixels
� start_y% = 255
�
�+ � height of water in pixels (approx)
� h% = (y%/2)
�
�6 � byte=byte OR orr%, for every pixel reflected.
�' � in the format BGgRbrtT where :
�, � R = high red bit, r = low red bit
�. � G = high green bit, g = low green bit
�- � B = high blue bit, b = low blue bit
- � T = high tint bit, t = low tint bit
orr% = %10001000
"
,
6module$ = "Water"
@
Jș "Hourglass_On"
T
�assemble
^ �init
h
rA�"SAVE <Modules$Dir>."+module$+".Module "+�~code%+" "+�~P%
|4�"SETTYPE <Modules$Dir>."+module$+".Module Data"
�
�ș "Hourglass_Off"
��
�
�
�
�� �assemble
� len% = 1024 * 2
� � code% len%
� � pass% = 8 � 10 � 2
� P% = code%
� L% = code% + len%
� [OPT pass%
.init EQUD 0
&".frame EQUD wave - code%
0.end EQUD 0
:
D
N
X'.wave STMFD R13!,{R0-R11,R14}
b ]
l � trigger% �
v [OPT pass%
�< TST R11,#( 1 << (�("z") - �(trigger$)) )
� BEQ wave_end
� ]
� �
� [OPT pass%
�
�
� LDR R0,var%
� CMP R0,#y%
� SUBGT R0,R0,#1
� STR R0,var%
�! MOV R1,R0,LSL#6
�$ ADD R1,R1,R0,LSL#8
E STR R1,offset% ; store scr_offset in offset%
F STR R12,screen% ; store scr_address in screen%
D ADD R0,R12,#(320*256) ; r0=screen+((bottom+1)*320)
> STR R0,max_scr% ; store r0 in max_scr%
*; LDR R11,offset% ; r11=screen_offset
4
>D MOV R2,R0 ; r2=maximum screen address
HA ADD R0,R1,R12 ; r0=scr_offset+scr_addr
R8 MOV R3,#0 ; r3=black word
\B.word_loop STR R3,[R0],#320 ; put word at left of line
fB CMP R0,R2 ; is scr_addr < max_addr ?
pC BLT word_loop ; if so, go to 'world_loop'
z
�A ADD R1,R12,R11 ; r1=screen+screen_offset
�@ STR R1,water_pos% ; store r1 in water_pos%
�? SUB R0,R1,#320 ; r0=addr of reflection
�D MOV R2,#h% ; r2=number of rows of water
�D LDR R11,wave_pos% ; r11=position in wave table
�A ADD R12,R11,#4 ; increment position by 4
�C CMP R12,#(h%*4) ; if it has exceeded table,
�< �Q R12,#0 ; then reset it to zero
�F STR R12,wave_pos% ; store position in wave table
�E ADR R12,table% ; r12=addr of wave data table
�D ADR R14,perspect% ; r14=perspective table addr
�
�8 B wave_1 ; go to 'wave_1'
C.table% �array(4*h%) ; water motion offsets table
B.perspect% �array(4*h%) ; perspective factors table
$
.8.wave_1 LDR R4,[R12,R11] ; r4=wave height
8B SUBS R11,R11,#4 ; move wave height pointer
B% MOVMI R11,#((h%-1)*4)
L@ LDR R5,[R14],#4 ; get perspective factor
V6 CMP R5,#0 ; is it zero ?
`= BEQ zero ; if so, go to 'zero'
jD MUL R6,R4,R5 ; r6=wave_height*perspective
t4 MOV R6,R6,ASR#20 ; r6=r6>>>20
~@ CMP R6,#0 ; is wave_height (r6) <0
�8 ADDLT R6,R6,#1 ; if so, r6=r6+1
�D LDR R1,water_pos% ; r1=screen offset for water
�A ADD R1,R1,R6,LSL#6 ; r1=r1+(wave_height*320)
�$ ADD R1,R1,R6,LSL#8
�C LDR R3,max_scr% ; r3=maximum screen address
�? CMP R1,R3 ; does r1 exceed this ?
�5 BGE exit ; if so, exit
�6 B skip ; go to 'skip'
�
�<.zero LDR R1,offset% ; when wave_height=0
� LDR R3,screen%
�B ADD R1,R1,R3 ; r1=screen_address+offset
B.skip STR R11,temp_wave% ; store wave table pointer
< LDR R11,orr_word% ; r11=byte �ing word
( ]
2 � loop% = 1 � 10
< [OPT pass%
F
P9 LDMIA R0!,{R3-R10} ; get screen data
Z? �R R3,R3,R11 ; set blue bits in words
d �R R4,R4,R11
n �R R5,R5,R11
x �R R6,R6,R11
� �R R7,R7,R11
� �R R8,R8,R11
� �R R9,R9,R11
� �R R10,R10,R11
�9 STMIA R1!,{R3-R10} ; plot reflection
�
� ]
� �
� [OPT pass%
�
�? LDR R11,temp_wave% ; get wave pointer back
�B SUB R0,R0,#960 ; screen_position-=3 lines
�; LDR R1,water_pos% ; r1=water_position
A ADD R1,R1,#320 ; add offset to next line
> STR R1,water_pos% ; store water_position
8 SUBS R2,R2,#1 ; another line ?
"? BNE wave_1 ; if so, go to 'wave_1'
,
6<.exit LDR R12,screen% ; r12=screen address
@B LDR R0,offset% ; r0=water address offset
J4 ADD R0,R0,R12 ; r0=r0+r12
TD LDR R2,max_scr% ; r2=maximum screen address
^B.fill_loop LDR R3,[R0] ; get word at left of line
hE CMP R3,#0 ; is it black (an empty line)
rC BNE move_fill ; if not, go to 'move_fill'
|D SUB R1,R0,#320 ; r1=address of line to copy
�
� ]
� � loop% = 1 � 10
� [OPT pass%
�
�@ LDMIA R1!,{R3-R10} ; get data of line above
�@ STMIA R0!,{R3-R10} ; store it in empty line
�
� ]
� �
� [OPT pass%
�
�< B end_fill ; jump to 'end_fill'
E.move_fill ADD R0,R0,#320 ; if not black goto next line
B.end_fill CMP R0,R2 ; is scr_addr < max_addr ?
B BLT fill_loop ; if so, go to 'fill_loop'
&
0..wave_end LDMFD R13!,{R0-R11,PC} ; exit
:
D
N .var% EQUD start_y%
X.water_pos% EQUD 0
b.temp_wave% EQUD 0
l.screen% EQUD 0
v .offset% EQUD y%*320
�.max_scr% EQUD 0
�.wave_pos% EQUD 0
�F.orr_word% EQUD orr% + (orr%*1<<8) + (orr%*1<<16) + (orr%*1<<24)
�
�
� ]
� �
��
�
�
�
�� �array(size%)
� P% += size%
= 0
* � �init
4
� I%
>
H � I% = 0 � (h% - 1)
R8 table%!(I%*4) = (h%/10) * ��(I% * (360/(h%/2)) )
\ �
f
p � I% = 0 � (h% - 1)
z4 perspect%!(I%*4) = (I% / (h%-1)) * (1 << 20)
� �
�
��
� 00000000 0d 00 0a 0c f4 20 3e 57 61 74 65 72 0d 00 14 04 |..... >Water....|
00000010 0d 00 1e 47 ee 20 85 20 c8 99 20 22 48 6f 75 72 |...G. . .. "Hour|
00000020 67 6c 61 73 73 5f 53 6d 61 73 68 22 3a 85 20 30 |glass_Smash":. 0|
00000030 2c 28 f6 24 2b 22 20 28 69 6e 74 65 72 6e 61 6c |,(.$+" (internal|
00000040 20 65 72 72 6f 72 20 63 6f 64 65 20 22 2b c3 28 | error code "+.(|
00000050 9e 29 2b 22 29 22 29 0d 00 28 04 0d 00 32 17 f4 |.)+")")..(...2..|
00000060 20 46 69 78 65 64 20 76 61 72 69 61 62 6c 65 73 | Fixed variables|
00000070 20 3a 0d 00 3c 04 0d 00 46 25 20 20 f4 20 4e 6f | :..<...F% . No|
00000080 74 65 20 3a 20 68 25 2a 32 20 63 61 6e 6e 6f 74 |te : h%*2 cannot|
00000090 20 62 65 20 3e 74 6f 70 25 20 21 0d 00 50 04 0d | be >top% !..P..|
000000a0 00 5a 14 20 20 74 72 69 67 67 65 72 24 20 3d 20 |.Z. trigger$ = |
000000b0 22 7a 22 0d 00 64 12 20 20 74 72 69 67 67 65 72 |"z"..d. trigger|
000000c0 25 20 3d 20 b9 0d 00 6e 04 0d 00 78 25 20 20 f4 |% = ...n...x% .|
000000d0 20 79 20 70 6f 73 69 74 69 6f 6e 20 6f 66 20 77 | y position of w|
000000e0 61 74 65 72 20 69 6e 20 70 69 78 65 6c 73 0d 00 |ater in pixels..|
000000f0 82 14 20 20 79 25 20 20 20 20 20 20 20 3d 20 31 |.. y% = 1|
00000100 37 30 0d 00 8c 04 0d 00 96 2c 20 20 f4 20 20 73 |70......., . s|
00000110 74 61 72 74 20 79 20 70 6f 73 69 74 69 6f 6e 20 |tart y position |
00000120 6f 66 20 77 61 74 65 72 20 69 6e 20 70 69 78 65 |of water in pixe|
00000130 6c 73 0d 00 a0 14 20 20 73 74 61 72 74 5f 79 25 |ls.... start_y%|
00000140 20 3d 20 32 35 35 0d 00 aa 04 0d 00 b4 2b 20 20 | = 255.......+ |
00000150 f4 20 20 68 65 69 67 68 74 20 6f 66 20 77 61 74 |. height of wat|
00000160 65 72 20 69 6e 20 70 69 78 65 6c 73 20 28 61 70 |er in pixels (ap|
00000170 70 72 6f 78 29 0d 00 be 17 20 20 68 25 20 20 20 |prox).... h% |
00000180 20 20 20 20 3d 20 28 79 25 2f 32 29 0d 00 c8 04 | = (y%/2)....|
00000190 0d 00 d2 36 20 20 f4 20 20 62 79 74 65 3d 62 79 |...6 . byte=by|
000001a0 74 65 20 4f 52 20 6f 72 72 25 2c 20 66 6f 72 20 |te OR orr%, for |
000001b0 65 76 65 72 79 20 70 69 78 65 6c 20 72 65 66 6c |every pixel refl|
000001c0 65 63 74 65 64 2e 0d 00 dc 27 20 20 f4 20 20 69 |ected....' . i|
000001d0 6e 20 74 68 65 20 66 6f 72 6d 61 74 20 42 47 67 |n the format BGg|
000001e0 52 62 72 74 54 20 77 68 65 72 65 20 3a 0d 00 e6 |RbrtT where :...|
000001f0 2c 20 20 f4 20 20 52 20 3d 20 68 69 67 68 20 72 |, . R = high r|
00000200 65 64 20 62 69 74 2c 20 20 20 72 20 3d 20 6c 6f |ed bit, r = lo|
00000210 77 20 72 65 64 20 62 69 74 0d 00 f0 2e 20 20 f4 |w red bit.... .|
00000220 20 20 47 20 3d 20 68 69 67 68 20 67 72 65 65 6e | G = high green|
00000230 20 62 69 74 2c 20 67 20 3d 20 6c 6f 77 20 67 72 | bit, g = low gr|
00000240 65 65 6e 20 62 69 74 0d 00 fa 2d 20 20 f4 20 20 |een bit...- . |
00000250 42 20 3d 20 68 69 67 68 20 62 6c 75 65 20 62 69 |B = high blue bi|
00000260 74 2c 20 20 62 20 3d 20 6c 6f 77 20 62 6c 75 65 |t, b = low blue|
00000270 20 62 69 74 0d 01 04 2d 20 20 f4 20 20 54 20 3d | bit...- . T =|
00000280 20 68 69 67 68 20 74 69 6e 74 20 62 69 74 2c 20 | high tint bit, |
00000290 20 74 20 3d 20 6c 6f 77 20 74 69 6e 74 20 62 69 | t = low tint bi|
000002a0 74 0d 01 0e 1a 20 20 6f 72 72 25 20 20 20 20 20 |t.... orr% |
000002b0 3d 20 25 31 30 30 30 31 30 30 30 0d 01 18 04 0d |= %10001000.....|
000002c0 01 22 04 0d 01 2c 04 0d 01 36 15 6d 6f 64 75 6c |."...,...6.modul|
000002d0 65 24 20 3d 20 22 57 61 74 65 72 22 0d 01 40 04 |e$ = "Water"..@.|
000002e0 0d 01 4a 15 c8 99 20 22 48 6f 75 72 67 6c 61 73 |..J... "Hourglas|
000002f0 73 5f 4f 6e 22 0d 01 54 0d f2 61 73 73 65 6d 62 |s_On"..T..assemb|
00000300 6c 65 0d 01 5e 09 f2 69 6e 69 74 0d 01 68 04 0d |le..^..init..h..|
00000310 01 72 41 ff 22 53 41 56 45 20 20 20 20 3c 4d 6f |.rA."SAVE <Mo|
00000320 64 75 6c 65 73 24 44 69 72 3e 2e 22 2b 6d 6f 64 |dules$Dir>."+mod|
00000330 75 6c 65 24 2b 22 2e 4d 6f 64 75 6c 65 20 22 2b |ule$+".Module "+|
00000340 c3 7e 63 6f 64 65 25 2b 22 20 22 2b c3 7e 50 25 |.~code%+" "+.~P%|
00000350 0d 01 7c 34 ff 22 53 45 54 54 59 50 45 20 3c 4d |..|4."SETTYPE <M|
00000360 6f 64 75 6c 65 73 24 44 69 72 3e 2e 22 2b 6d 6f |odules$Dir>."+mo|
00000370 64 75 6c 65 24 2b 22 2e 4d 6f 64 75 6c 65 20 44 |dule$+".Module D|
00000380 61 74 61 22 0d 01 86 04 0d 01 90 16 c8 99 20 22 |ata".......... "|
00000390 48 6f 75 72 67 6c 61 73 73 5f 4f 66 66 22 0d 01 |Hourglass_Off"..|
000003a0 9a 05 e0 0d 01 a4 04 0d 01 ae 04 0d 01 b8 04 0d |................|
000003b0 01 c2 0f dd 20 f2 61 73 73 65 6d 62 6c 65 0d 01 |.... .assemble..|
000003c0 cc 15 20 20 6c 65 6e 25 20 3d 20 31 30 32 34 20 |.. len% = 1024 |
000003d0 2a 20 32 0d 01 d6 12 20 20 de 20 63 6f 64 65 25 |* 2.... . code%|
000003e0 20 6c 65 6e 25 0d 01 e0 1a 20 20 e3 20 70 61 73 | len%.... . pas|
000003f0 73 25 20 3d 20 38 20 b8 20 31 30 20 88 20 32 0d |s% = 8 . 10 . 2.|
00000400 01 ea 12 20 20 20 20 50 25 20 3d 20 63 6f 64 65 |... P% = code|
00000410 25 0d 01 f4 19 20 20 20 20 4c 25 20 3d 20 63 6f |%.... L% = co|
00000420 64 65 25 20 2b 20 6c 65 6e 25 0d 01 fe 12 20 20 |de% + len%.... |
00000430 20 20 5b 4f 50 54 20 70 61 73 73 25 0d 02 08 04 | [OPT pass%....|
00000440 0d 02 12 04 0d 02 1c 17 2e 69 6e 69 74 20 20 20 |.........init |
00000450 20 20 20 20 45 51 55 44 20 20 30 0d 02 26 22 2e | EQUD 0..&".|
00000460 66 72 61 6d 65 20 20 20 20 20 20 45 51 55 44 20 |frame EQUD |
00000470 20 77 61 76 65 20 2d 20 63 6f 64 65 25 0d 02 30 | wave - code%..0|
00000480 17 2e 65 6e 64 20 20 20 20 20 20 20 20 45 51 55 |..end EQU|
00000490 44 20 20 30 0d 02 3a 04 0d 02 44 04 0d 02 4e 04 |D 0..:...D...N.|
000004a0 0d 02 58 27 2e 77 61 76 65 20 20 20 20 20 20 20 |..X'.wave |
000004b0 53 54 4d 46 44 20 52 31 33 21 2c 7b 52 30 2d 52 |STMFD R13!,{R0-R|
000004c0 31 31 2c 52 31 34 7d 0d 02 62 11 20 20 20 20 20 |11,R14}..b. |
000004d0 20 20 20 20 20 20 20 5d 0d 02 6c 1c 20 20 20 20 | ]..l. |
000004e0 20 20 20 20 20 20 20 20 e7 20 74 72 69 67 67 65 | . trigge|
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00001360 20 20 84 52 20 20 20 52 38 2c 52 38 2c 52 31 31 | .R R8,R8,R11|
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00001580 0d 06 18 38 20 20 20 20 20 20 20 20 20 20 20 20 |...8 |
00001590 53 55 42 53 20 20 52 32 2c 52 32 2c 23 31 20 20 |SUBS R2,R2,#1 |
000015a0 20 20 20 20 20 20 20 20 3b 20 61 6e 6f 74 68 65 | ; anothe|
000015b0 72 20 6c 69 6e 65 20 3f 0d 06 22 3f 20 20 20 20 |r line ?.."? |
000015c0 20 20 20 20 20 20 20 20 42 4e 45 20 20 20 77 61 | BNE wa|
000015d0 76 65 5f 31 20 20 20 20 20 20 20 20 20 20 20 20 |ve_1 |
000015e0 3b 20 69 66 20 73 6f 2c 20 67 6f 20 74 6f 20 27 |; if so, go to '|
000015f0 77 61 76 65 5f 31 27 0d 06 2c 04 0d 06 36 3c 2e |wave_1'..,...6<.|
00001600 65 78 69 74 20 20 20 20 20 20 20 4c 44 52 20 20 |exit LDR |
00001610 20 52 31 32 2c 73 63 72 65 65 6e 25 20 20 20 20 | R12,screen% |
00001620 20 20 20 3b 20 72 31 32 3d 73 63 72 65 65 6e 20 | ; r12=screen |
00001630 61 64 64 72 65 73 73 0d 06 40 42 20 20 20 20 20 |address..@B |
00001640 20 20 20 20 20 20 20 4c 44 52 20 20 20 52 30 2c | LDR R0,|
00001650 6f 66 66 73 65 74 25 20 20 20 20 20 20 20 20 3b |offset% ;|
00001660 20 20 72 30 3d 77 61 74 65 72 20 61 64 64 72 65 | r0=water addre|
00001670 73 73 20 6f 66 66 73 65 74 0d 06 4a 34 20 20 20 |ss offset..J4 |
00001680 20 20 20 20 20 20 20 20 20 41 44 44 20 20 20 52 | ADD R|
00001690 30 2c 52 30 2c 52 31 32 20 20 20 20 20 20 20 20 |0,R0,R12 |
000016a0 20 3b 20 20 72 30 3d 72 30 2b 72 31 32 0d 06 54 | ; r0=r0+r12..T|
000016b0 44 20 20 20 20 20 20 20 20 20 20 20 20 4c 44 52 |D LDR|
000016c0 20 20 20 52 32 2c 6d 61 78 5f 73 63 72 25 20 20 | R2,max_scr% |
000016d0 20 20 20 20 20 3b 20 20 72 32 3d 6d 61 78 69 6d | ; r2=maxim|
000016e0 75 6d 20 73 63 72 65 65 6e 20 61 64 64 72 65 73 |um screen addres|
000016f0 73 0d 06 5e 42 2e 66 69 6c 6c 5f 6c 6f 6f 70 20 |s..^B.fill_loop |
00001700 20 4c 44 52 20 20 20 52 33 2c 5b 52 30 5d 20 20 | LDR R3,[R0] |
00001710 20 20 20 20 20 20 20 20 20 3b 20 67 65 74 20 77 | ; get w|
00001720 6f 72 64 20 61 74 20 6c 65 66 74 20 6f 66 20 6c |ord at left of l|
00001730 69 6e 65 0d 06 68 45 20 20 20 20 20 20 20 20 20 |ine..hE |
00001740 20 20 20 43 4d 50 20 20 20 52 33 2c 23 30 20 20 | CMP R3,#0 |
00001750 20 20 20 20 20 20 20 20 20 20 20 3b 20 69 73 20 | ; is |
00001760 69 74 20 62 6c 61 63 6b 20 28 61 6e 20 65 6d 70 |it black (an emp|
00001770 74 79 20 6c 69 6e 65 29 0d 06 72 43 20 20 20 20 |ty line)..rC |
00001780 20 20 20 20 20 20 20 20 42 4e 45 20 20 20 6d 6f | BNE mo|
00001790 76 65 5f 66 69 6c 6c 20 20 20 20 20 20 20 20 20 |ve_fill |
000017a0 3b 20 69 66 20 6e 6f 74 2c 20 67 6f 20 74 6f 20 |; if not, go to |
000017b0 27 6d 6f 76 65 5f 66 69 6c 6c 27 0d 06 7c 44 20 |'move_fill'..|D |
000017c0 20 20 20 20 20 20 20 20 20 20 20 53 55 42 20 20 | SUB |
000017d0 20 52 31 2c 52 30 2c 23 33 32 30 20 20 20 20 20 | R1,R0,#320 |
000017e0 20 20 20 3b 20 72 31 3d 61 64 64 72 65 73 73 20 | ; r1=address |
000017f0 6f 66 20 6c 69 6e 65 20 74 6f 20 63 6f 70 79 0d |of line to copy.|
00001800 06 86 10 20 20 20 20 20 20 20 20 20 20 20 20 0d |... .|
00001810 06 90 11 20 20 20 20 20 20 20 20 20 20 20 20 5d |... ]|
00001820 0d 06 9a 20 20 20 20 20 20 20 20 20 20 20 20 20 |... |
00001830 e3 20 6c 6f 6f 70 25 20 3d 20 31 20 b8 20 31 30 |. loop% = 1 . 10|
00001840 0d 06 a4 1c 20 20 20 20 20 20 20 20 20 20 20 20 |.... |
00001850 20 20 5b 4f 50 54 20 70 61 73 73 25 0d 06 ae 12 | [OPT pass%....|
00001860 20 20 20 20 20 20 20 20 20 20 20 20 20 20 0d 06 | ..|
00001870 b8 40 20 20 20 20 20 20 20 20 20 20 20 20 4c 44 |.@ LD|
00001880 4d 49 41 20 52 31 21 2c 7b 52 33 2d 52 31 30 7d |MIA R1!,{R3-R10}|
00001890 20 20 20 20 20 20 3b 20 67 65 74 20 64 61 74 61 | ; get data|
000018a0 20 6f 66 20 6c 69 6e 65 20 61 62 6f 76 65 0d 06 | of line above..|
000018b0 c2 40 20 20 20 20 20 20 20 20 20 20 20 20 53 54 |.@ ST|
000018c0 4d 49 41 20 52 30 21 2c 7b 52 33 2d 52 31 30 7d |MIA R0!,{R3-R10}|
000018d0 20 20 20 20 20 20 3b 20 73 74 6f 72 65 20 69 74 | ; store it|
000018e0 20 69 6e 20 65 6d 70 74 79 20 6c 69 6e 65 0d 06 | in empty line..|
000018f0 cc 10 20 20 20 20 20 20 20 20 20 20 20 20 0d 06 |.. ..|
00001900 d6 13 20 20 20 20 20 20 20 20 20 20 20 20 20 20 |.. |
00001910 5d 0d 06 e0 11 20 20 20 20 20 20 20 20 20 20 20 |].... |
00001920 20 ed 0d 06 ea 1a 20 20 20 20 20 20 20 20 20 20 | ..... |
00001930 20 20 5b 4f 50 54 20 70 61 73 73 25 0d 06 f4 10 | [OPT pass%....|
00001940 20 20 20 20 20 20 20 20 20 20 20 20 0d 06 fe 3c | ...<|
00001950 20 20 20 20 20 20 20 20 20 20 20 20 42 20 20 20 | B |
00001960 20 20 65 6e 64 5f 66 69 6c 6c 20 20 20 20 20 20 | end_fill |
00001970 20 20 20 20 3b 20 6a 75 6d 70 20 74 6f 20 27 65 | ; jump to 'e|
00001980 6e 64 5f 66 69 6c 6c 27 0d 07 08 45 2e 6d 6f 76 |nd_fill'...E.mov|
00001990 65 5f 66 69 6c 6c 20 20 41 44 44 20 20 20 52 30 |e_fill ADD R0|
000019a0 2c 52 30 2c 23 33 32 30 20 20 20 20 20 20 20 20 |,R0,#320 |
000019b0 3b 20 69 66 20 6e 6f 74 20 62 6c 61 63 6b 20 67 |; if not black g|
000019c0 6f 74 6f 20 6e 65 78 74 20 6c 69 6e 65 0d 07 12 |oto next line...|
000019d0 42 2e 65 6e 64 5f 66 69 6c 6c 20 20 20 43 4d 50 |B.end_fill CMP|
000019e0 20 20 20 52 30 2c 52 32 20 20 20 20 20 20 20 20 | R0,R2 |
000019f0 20 20 20 20 20 3b 20 69 73 20 73 63 72 5f 61 64 | ; is scr_ad|
00001a00 64 72 20 3c 20 6d 61 78 5f 61 64 64 72 20 3f 0d |dr < max_addr ?.|
00001a10 07 1c 42 20 20 20 20 20 20 20 20 20 20 20 20 42 |..B B|
00001a20 4c 54 20 20 20 66 69 6c 6c 5f 6c 6f 6f 70 20 20 |LT fill_loop |
00001a30 20 20 20 20 20 20 20 3b 20 69 66 20 73 6f 2c 20 | ; if so, |
00001a40 67 6f 20 74 6f 20 27 66 69 6c 6c 5f 6c 6f 6f 70 |go to 'fill_loop|
00001a50 27 0d 07 26 04 0d 07 30 2e 2e 77 61 76 65 5f 65 |'..&...0..wave_e|
00001a60 6e 64 20 20 20 4c 44 4d 46 44 20 52 31 33 21 2c |nd LDMFD R13!,|
00001a70 7b 52 30 2d 52 31 31 2c 50 43 7d 20 20 3b 20 65 |{R0-R11,PC} ; e|
00001a80 78 69 74 0d 07 3a 04 0d 07 44 04 0d 07 4e 1e 2e |xit..:...D...N..|
00001a90 76 61 72 25 20 20 20 20 20 20 20 45 51 55 44 20 |var% EQUD |
00001aa0 20 73 74 61 72 74 5f 79 25 0d 07 58 17 2e 77 61 | start_y%..X..wa|
00001ab0 74 65 72 5f 70 6f 73 25 20 45 51 55 44 20 20 30 |ter_pos% EQUD 0|
00001ac0 0d 07 62 17 2e 74 65 6d 70 5f 77 61 76 65 25 20 |..b..temp_wave% |
00001ad0 45 51 55 44 20 20 30 0d 07 6c 17 2e 73 63 72 65 |EQUD 0..l..scre|
00001ae0 65 6e 25 20 20 20 20 45 51 55 44 20 20 30 0d 07 |en% EQUD 0..|
00001af0 76 1c 2e 6f 66 66 73 65 74 25 20 20 20 20 45 51 |v..offset% EQ|
00001b00 55 44 20 20 79 25 2a 33 32 30 0d 07 80 17 2e 6d |UD y%*320.....m|
00001b10 61 78 5f 73 63 72 25 20 20 20 45 51 55 44 20 20 |ax_scr% EQUD |
00001b20 30 0d 07 8a 17 2e 77 61 76 65 5f 70 6f 73 25 20 |0.....wave_pos% |
00001b30 20 45 51 55 44 20 20 30 0d 07 94 46 2e 6f 72 72 | EQUD 0...F.orr|
00001b40 5f 77 6f 72 64 25 20 20 45 51 55 44 20 20 6f 72 |_word% EQUD or|
00001b50 72 25 20 2b 20 28 6f 72 72 25 2a 31 3c 3c 38 29 |r% + (orr%*1<<8)|
00001b60 20 2b 20 28 6f 72 72 25 2a 31 3c 3c 31 36 29 20 | + (orr%*1<<16) |
00001b70 2b 20 28 6f 72 72 25 2a 31 3c 3c 32 34 29 0d 07 |+ (orr%*1<<24)..|
00001b80 9e 04 0d 07 a8 04 0d 07 b2 09 20 20 20 20 5d 0d |.......... ].|
00001b90 07 bc 07 20 20 ed 0d 07 c6 05 e1 0d 07 d0 04 0d |... ...........|
00001ba0 07 da 04 0d 07 e4 04 0d 07 ee 13 dd 20 a4 61 72 |............ .ar|
00001bb0 72 61 79 28 73 69 7a 65 25 29 0d 07 f8 11 20 20 |ray(size%).... |
00001bc0 50 25 20 2b 3d 20 73 69 7a 65 25 0d 08 02 07 3d |P% += size%....=|
00001bd0 20 30 0d 08 0c 04 0d 08 16 04 0d 08 20 04 0d 08 | 0.......... ...|
00001be0 2a 0b dd 20 f2 69 6e 69 74 0d 08 34 0a 20 20 ea |*.. .init..4. .|
00001bf0 20 49 25 0d 08 3e 04 0d 08 48 19 20 20 e3 20 49 | I%..>...H. . I|
00001c00 25 20 3d 20 30 20 b8 20 28 68 25 20 2d 20 31 29 |% = 0 . (h% - 1)|
00001c10 0d 08 52 38 20 20 20 20 74 61 62 6c 65 25 21 28 |..R8 table%!(|
00001c20 49 25 2a 34 29 20 3d 20 28 68 25 2f 31 30 29 20 |I%*4) = (h%/10) |
00001c30 2a 20 b5 b2 28 49 25 20 2a 20 28 33 36 30 2f 28 |* ..(I% * (360/(|
00001c40 68 25 2f 32 29 29 20 29 0d 08 5c 07 20 20 ed 0d |h%/2)) )..\. ..|
00001c50 08 66 04 0d 08 70 19 20 20 e3 20 49 25 20 3d 20 |.f...p. . I% = |
00001c60 30 20 b8 20 28 68 25 20 2d 20 31 29 0d 08 7a 34 |0 . (h% - 1)..z4|
00001c70 20 20 20 20 70 65 72 73 70 65 63 74 25 21 28 49 | perspect%!(I|
00001c80 25 2a 34 29 20 3d 20 28 49 25 20 2f 20 28 68 25 |%*4) = (I% / (h%|
00001c90 2d 31 29 29 20 2a 20 28 31 20 3c 3c 20 32 30 29 |-1)) * (1 << 20)|
00001ca0 0d 08 84 07 20 20 ed 0d 08 8e 04 0d 08 98 05 e1 |.... ..........|
00001cb0 0d ff |..|
00001cb2 
.