Home » Archimedes archive » Archimedes World » AW-1996-09.adf » !AcornAns_AcornAns » Whizzy
Whizzy
This website contains an archive of files for the Acorn Electron, BBC Micro, Acorn Archimedes, Commodore 16 and Commodore 64 computers, which Dominic Ford has rescued from his private collection of floppy disks and cassettes.
Some of these files were originally commercial releases in the 1980s and 1990s, but they are now widely available online. I assume that copyright over them is no longer being asserted. If you own the copyright and would like files to be removed, please contact me.
| Tape/disk: | Home » Archimedes archive » Archimedes World » AW-1996-09.adf » !AcornAns_AcornAns |
| Filename: | Whizzy |
| Read OK: | ✔ |
| File size: | 18B4 bytes |
| Load address: | 0000 |
| Exec address: | 0000 |
File contents
10MODE 0
20PROCinit
30PROCass
40:
50ON ERROR SYS 6,112,1:SYS 6,113,1:PRINT REPORT$;" at line ";ERL:END
60MODE 13+128:MODE 13:OFF
70SYS 6,112,1:SYS 6,113,1
80REPEAT
90 CALL swim%
100UNTIL FALSE
110END
120:
130DEF PROCinit
140mnp%=4000
150np%=2
160:
170ds%=20
180DIM code% 1024, data% ds%*mnp%, trig% 16384*4
190:
200FOR i%=0 TO np%-1
210p% = data%+ds%*i%
220p%!0 = (RND(320)-1)*256 :REM x coord in 1/256ths of a pixel
230p%!4 = (RND(256)-1)*256 :REM y coord
240p%!8 = (RND(16384)-1) :REM direction (an index into trig)
250p%!12 = (2*RND(2)-3)*2608/(RND(100)) :REM angular velocity
260p%!16 = RND(21)-11 :REM angular acceleration
270NEXT
280ENDPROC
290:
300DEF PROCass
310!code%=148:code%!4=-1
320SYS "OS_ReadVduVariables",code%,code%
330scrst%=!code%
340s%=0:c%=256
350trig%!0 = (( s% AND65535)<<16) + ( c% AND65535)
360trig%!(4*8192) = (( s% AND65535)<<16) + ((-c%)AND65535)
370FOR i%=1 TO 4096
380s%=-256*SIN(i%*PI/8192):c%=256*COS(i%*PI/8192)
390trig%!(4*i%) = (( s% AND65535)<<16) + ( c% AND65535)
400trig%!(4*(8192-i%)) = (( s% AND65535)<<16) + ((-c%)AND65535)
410trig%!(4*(8192+i%)) = (((-s%)AND65535)<<16) + ((-c%)AND65535)
420trig%!(4*(16384-i%)) = (((-s%)AND65535)<<16) + ( c% AND65535)
430NEXT
440:
450b%=4 : REM Plotting code requires objects lie fully within screen.
460 REM b% ensures object centres leave border of this many
470 REM pixels from edge giving room to plot object.
480:
490FOR pass%=0 TO 2 STEP 2
500P%=code%
510[OPT pass%
520.ascrstsum% EQUD scrst%*2+81920
530.ascrst% EQUD scrst%
540.abank% EQUD 1
550.adata% EQUD data%:EQUD data%+ds%*np%:EQUD data%+ds%*mnp%
560.atrig% EQUD trig%
570.seed% EQUD -1:EQUD -1
580.swim% ;purpose - to move all objects one
590STMFD 13!, {14} ; frame forward and display this
600: ; new frame
610MOV 0, #19
620SWI "OS_Byte" ;wait for vsync
630MOV 0, #113
640LDR 1, abank%
650RSB 3, 1, #3
660STR 3, abank%
670SWI "OS_Byte" ;swap displayed screen banks
680LDR 0, ascrstsum%
690LDR 1, ascrst%
700SUB 1, 0, 1
710STR 1, ascrst% ;swap ptr to other bank
720: ; (to be written to)
730BL cls% ;cls that bank
740:
750ADR 14, adata%
760LDMIA 14, {0,1} ;get ptrs to start & end of objects
770LDR 2, ascrst% ;get ptr to screen memory
780ADR 14, seed%
790LDMIA 14, {3,4} ;get low and high words of ran# seed
800LDR 12, atrig% ;get ptr to trig table
810:
820.swimloop% ;scan each object in our list -
830:
840LDMIA 0, {5,6,7,8,9} ;get next object's details
850:
860MOVS 4, 4, LSR #1 ;generate random 32-bit number
870MOVS 14, 3, RRX
880ADC 4, 4, 4
890EOR 14, 14, 3, LSL #12
900EOR 3, 14, 14, LSR #20
910ANDS 14, 3, #127 ;look at low 7 bits
920RSBEQ 8, 8, #0 ;if zero (1 in 128 chance) reverse
930: ;angular velocity
940:
950ADD 8, 8, 9 ;modify ang velocity by ang acc
960ADD 7, 7, 8 ;modify direction by ang vel
970MOV 7, 7, LSL #18
980MOV 7, 7, LSR #18
990LDR 14, [12, 7, LSL #2] ;look up new dir from trig table
1000MOV 10, 14, ASR #16 ;split it into x and
1010MOV 11, 14, ASL #16 ;y components
1020MOV 11, 11, ASR #16
1030:
1040ADD 5, 5, 10 ;modify position via direction
1050CMP 5, #b%*256 ;vector and apply wrap-around
1060ADDLT 5, 5, #(320-2*b%)*256 ;if object moves off screen
1070CMP 5, #(320-b%)*256
1080SUBGE 5, 5, #(320-2*b%)*256
1090ADD 6, 6, 11
1100CMP 6, #b%*256
1110ADDLT 6, 6, #(256-2*b%)*256
1120CMP 6, #(256-b%)*256
1130SUBGE 6, 6, #(256-2*b%)*256
1140:
1150MOV 14, 6, LSR #8 ;get address on screen of object
1160ADD 14, 14, 14, LSL #2 ;centre (remember first to convert
1170ADD 14, 2, 14, LSL #6 ;coords in 1/256'ths of a pixel
1180STRB 0, [14, 5, LSR #8]! ;to integer pixel coords via LSR #8)
1190STRB 0, [14, #320]
1200STRB 0, [14, #-320] ;write to object centre and the
1210STRB 0, [14, #-1] ;four surrounding pixels, giving a
1220STRB 0, [14, #1] ;small + shape
1230:
1240CMP 8, #2048*1.125 ;if object has very high ang vel
1250BLT noswimadd% ;let it reproduce!
1260LDR 14, adata%+8
1270CMP 14, 1 ;(if there is room to add another
1280BLS noswimadd% ; object to our list)
1290MOV 8, 8, ASR #11 ;give new objects lower ang vel
1300STMIA 1, {5,6,7,8,9} ;(else get rapid chain reaction)
1310ADD 1, 1, #ds%
1320STR 1, adata%+4
1330RSB 8, 8, #0 ;and alter direction of one so they
1340ADD 7, 7, #8192 ;head off in different directions
1350MOV 7, 7, LSL #18
1360MOV 7, 7, LSR #18
1370SWI 256+7 ;make a beep to mark birth!
1380:
1390.noswimadd%
1400:
1410STMIA 0, {5,6,7,8} ;resave object's modified details
1420ADD 0, 0, #ds%
1430CMP 0, 1
1440BLO swimloop% ;repeat for next if any more exist
1450ADR 14, seed%
1460STMIA 14, {3,4}
1470LDMFD 13!, {PC} ;all objects moved so EXIT!
1480:
1490.alrcls% EQUD 0
1500.aspcls% EQUD 0
1510.cls% ;simple routine to clear screen
1520STR 14, alrcls% ;as rapidly as possible -
1530STR 13, aspcls% ;note the heavy use of STM.
1540LDR 0, ascrst%
1550MOV 1, #105
1560MOV 2, #0
1570ORR 2, 2, 2, LSL #8
1580ORR 2, 2, 2, LSL #16
1590MOV 3, 2
1600MOV 4, 2
1610MOV 5, 2
1620MOV 6, 2
1630MOV 7, 2
1640MOV 8, 2
1650MOV 9, 2
1660MOV 10, 2
1670MOV 11, 2
1680MOV 12, 2
1690MOV 13, 2
1700MOV 14, 2
1710.clsloop%
1720STMIA 0!, {2-14}
1730STMIA 0!, {2-14}
1740STMIA 0!, {2-14}
1750STMIA 0!, {2-14}
1760STMIA 0!, {2-14}
1770STMIA 0!, {2-14}
1780STMIA 0!, {2-14}
1790STMIA 0!, {2-14}
1800STMIA 0!, {2-14}
1810STMIA 0!, {2-14}
1820STMIA 0!, {2-14}
1830STMIA 0!, {2-14}
1840STMIA 0!, {2-14}
1850STMIA 0!, {2-14}
1860STMIA 0!, {2-14}
1870SUBS 1, 1, #1
1880BNE clsloop%
1890STMIA 0!, {2-6}
1900LDR 13, aspcls%
1910LDR PC, alrcls%
1920]
1930NEXT
1940ENDPROC
� 0
�init
�ass
(:
22� � ș 6,112,1:ș 6,113,1:� �$;" at line ";�:�
<� 13+128:� 13:�
Fș 6,112,1:ș 6,113,1
P�
Z � swim%
d� �
n�
x:
� � �init
�
mnp%=4000
� np%=2
�:
�
ds%=20
�/� code% 1024, data% ds%*mnp%, trig% 16384*4
�:
�� i%=0 � np%-1
�p% = data%+ds%*i%
�Bp%!0 = (�(320)-1)*256 :� x coord in 1/256ths of a pixel
�+p%!4 = (�(256)-1)*256 :� y coord
�Bp%!8 = (�(16384)-1) :� direction (an index into trig)
�8p%!12 = (2*�(2)-3)*2608/(�(100)) :� angular velocity
>p%!16 = �(21)-11 :� angular acceleration
�
�
":
,
� �ass
6!code%=148:code%!4=-1
@(ș "OS_ReadVduVariables",code%,code%
Jscrst%=!code%
Ts%=0:c%=256
^>trig%!0 = (( s% �65535)<<16) + ( c% �65535)
h>trig%!(4*8192) = (( s% �65535)<<16) + ((-c%)�65535)
r� i%=1 � 4096
|,s%=-256*�(i%*�/8192):c%=256*�(i%*�/8192)
�>trig%!(4*i%) = (( s% �65535)<<16) + ( c% �65535)
�>trig%!(4*(8192-i%)) = (( s% �65535)<<16) + ((-c%)�65535)
�>trig%!(4*(8192+i%)) = (((-s%)�65535)<<16) + ((-c%)�65535)
�>trig%!(4*(16384-i%)) = (((-s%)�65535)<<16) + ( c% �65535)
��
�:
�Db%=4 : � Plotting code requires objects lie fully within screen.
�@ � b% ensures object centres leave border of this many
�9 � pixels from edge giving room to plot object.
�:
�� pass%=0 � 2 � 2
� P%=code%
�[OPT pass%
+.ascrstsum% EQUD scrst%*2+81920
.ascrst% EQUD scrst%
.abank% EQUD 1
&?.adata% EQUD data%:EQUD data%+ds%*np%:EQUD data%+ds%*mnp%
0.atrig% EQUD trig%
: .seed% EQUD -1:EQUD -1
DD.swim% ;purpose - to move all objects one
NBSTMFD 13!, {14} ; frame forward and display this
X-: ; new frame
bMOV 0, #19
l1SWI "OS_Byte" ;wait for vsync
vMOV 0, #113
�LDR 1, abank%
�RSB 3, 1, #3
�STR 3, abank%
�>SWI "OS_Byte" ;swap displayed screen banks
�LDR 0, ascrstsum%
�LDR 1, ascrst%
�SUB 1, 0, 1
�9STR 1, ascrst% ;swap ptr to other bank
�6: ; (to be written to)
�0BL cls% ;cls that bank
�:
�ADR 14, adata%
�ELDMIA 14, {0,1} ;get ptrs to start & end of objects
;LDR 2, ascrst% ;get ptr to screen memory
ADR 14, seed%
FLDMIA 14, {3,4} ;get low and high words of ran# seed
8LDR 12, atrig% ;get ptr to trig table
*:
4A.swimloop% ;scan each object in our list -
>:
H<LDMIA 0, {5,6,7,8,9} ;get next object's details
R:
\@MOVS 4, 4, LSR #1 ;generate random 32-bit number
fMOVS 14, 3, RRX
pADC 4, 4, 4
z � 14, 14, 3, LSL #12
� � 3, 14, 14, LSR #20
�3�S 14, 3, #127 ;look at low 7 bits
�DRSBEQ 8, 8, #0 ;if zero (1 in 128 chance) reverse
�3: ;angular velocity
�:
�AADD 8, 8, 9 ;modify ang velocity by ang acc
�>ADD 7, 7, 8 ;modify direction by ang vel
�MOV 7, 7, LSL #18
�MOV 7, 7, LSR #18
�BLDR 14, [12, 7, LSL #2] ;look up new dir from trig table
�6MOV 10, 14, ASR #16 ;split it into x and
�/MOV 11, 14, ASL #16 ;y components
� MOV 11, 11, ASR #16
:
@ADD 5, 5, 10 ;modify position via direction
?CMP 5, #b%*256 ;vector and apply wrap-around
$?ADDLT 5, 5, #(320-2*b%)*256 ;if object moves off screen
. CMP 5, #(320-b%)*256
8#SUBGE 5, 5, #(320-2*b%)*256
BADD 6, 6, 11
LCMP 6, #b%*256
V#ADDLT 6, 6, #(256-2*b%)*256
` CMP 6, #(256-b%)*256
j#SUBGE 6, 6, #(256-2*b%)*256
t:
~BMOV 14, 6, LSR #8 ;get address on screen of object
�DADD 14, 14, 14, LSL #2 ;centre (remember first to convert
�AADD 14, 2, 14, LSL #6 ;coords in 1/256'ths of a pixel
�FSTRB 0, [14, 5, LSR #8]! ;to integer pixel coords via LSR #8)
�STRB 0, [14, #320]
�ASTRB 0, [14, #-320] ;write to object centre and the
�DSTRB 0, [14, #-1] ;four surrounding pixels, giving a
�0STRB 0, [14, #1] ;small + shape
�:
�BCMP 8, #2048*1.125 ;if object has very high ang vel
�4BLT noswimadd% ;let it reproduce!
�LDR 14, adata%+8
�CCMP 14, 1 ;(if there is room to add another
7BLS noswimadd% ; object to our list)
AMOV 8, 8, ASR #11 ;give new objects lower ang vel
BSTMIA 1, {5,6,7,8,9} ;(else get rapid chain reaction)
ADD 1, 1, #ds%
(STR 1, adata%+4
2ERSB 8, 8, #0 ;and alter direction of one so they
<CADD 7, 7, #8192 ;head off in different directions
FMOV 7, 7, LSL #18
PMOV 7, 7, LSR #18
Z=SWI 256+7 ;make a beep to mark birth!
d:
n.noswimadd%
x:
�CSTMIA 0, {5,6,7,8} ;resave object's modified details
�ADD 0, 0, #ds%
�CMP 0, 1
�DBLO swimloop% ;repeat for next if any more exist
�ADR 14, seed%
�STMIA 14, {3,4}
�=LDMFD 13!, {PC} ;all objects moved so EXIT!
�:
�.alrcls% EQUD 0
�.aspcls% EQUD 0
�@.cls% ;simple routine to clear screen
�:STR 14, alrcls% ;as rapidly as possible -
�<STR 13, aspcls% ;note the heavy use of STM.
LDR 0, ascrst%
MOV 1, #105
MOV 2, #0
"�R 2, 2, 2, LSL #8
, �R 2, 2, 2, LSL #16
6MOV 3, 2
@MOV 4, 2
JMOV 5, 2
TMOV 6, 2
^MOV 7, 2
hMOV 8, 2
rMOV 9, 2
|MOV 10, 2
�MOV 11, 2
�MOV 12, 2
�MOV 13, 2
�MOV 14, 2
�
.clsloop%
�STMIA 0!, {2-14}
�STMIA 0!, {2-14}
�STMIA 0!, {2-14}
�STMIA 0!, {2-14}
�STMIA 0!, {2-14}
�STMIA 0!, {2-14}
�STMIA 0!, {2-14}
�STMIA 0!, {2-14}
STMIA 0!, {2-14}
STMIA 0!, {2-14}
STMIA 0!, {2-14}
&STMIA 0!, {2-14}
0STMIA 0!, {2-14}
:STMIA 0!, {2-14}
DSTMIA 0!, {2-14}
NSUBS 1, 1, #1
XBNE clsloop%
bSTMIA 0!, {2-6}
lLDR 13, aspcls%
vLDR PC, alrcls%
�]
��
��
� 00000000 0d 00 0a 07 eb 20 30 0d 00 14 09 f2 69 6e 69 74 |..... 0.....init|
00000010 0d 00 1e 08 f2 61 73 73 0d 00 28 05 3a 0d 00 32 |.....ass..(.:..2|
00000020 32 ee 20 85 20 c8 99 20 36 2c 31 31 32 2c 31 3a |2. . .. 6,112,1:|
00000030 c8 99 20 36 2c 31 31 33 2c 31 3a f1 20 f6 24 3b |.. 6,113,1:. .$;|
00000040 22 20 61 74 20 6c 69 6e 65 20 22 3b 9e 3a e0 0d |" at line ";.:..|
00000050 00 3c 13 eb 20 31 33 2b 31 32 38 3a eb 20 31 33 |.<.. 13+128:. 13|
00000060 3a 87 0d 00 46 19 c8 99 20 36 2c 31 31 32 2c 31 |:...F... 6,112,1|
00000070 3a c8 99 20 36 2c 31 31 33 2c 31 0d 00 50 05 f5 |:.. 6,113,1..P..|
00000080 0d 00 5a 0c 20 d6 20 73 77 69 6d 25 0d 00 64 07 |..Z. . swim%..d.|
00000090 fd 20 a3 0d 00 6e 05 e0 0d 00 78 05 3a 0d 00 82 |. ...n....x.:...|
000000a0 0b dd 20 f2 69 6e 69 74 0d 00 8c 0d 6d 6e 70 25 |.. .init....mnp%|
000000b0 3d 34 30 30 30 0d 00 96 09 6e 70 25 3d 32 0d 00 |=4000....np%=2..|
000000c0 a0 05 3a 0d 00 aa 0a 64 73 25 3d 32 30 0d 00 b4 |..:....ds%=20...|
000000d0 2f de 20 63 6f 64 65 25 20 31 30 32 34 2c 20 64 |/. code% 1024, d|
000000e0 61 74 61 25 20 64 73 25 2a 6d 6e 70 25 2c 20 74 |ata% ds%*mnp%, t|
000000f0 72 69 67 25 20 31 36 33 38 34 2a 34 0d 00 be 05 |rig% 16384*4....|
00000100 3a 0d 00 c8 12 e3 20 69 25 3d 30 20 b8 20 6e 70 |:..... i%=0 . np|
00000110 25 2d 31 0d 00 d2 15 70 25 20 3d 20 64 61 74 61 |%-1....p% = data|
00000120 25 2b 64 73 25 2a 69 25 0d 00 dc 42 70 25 21 30 |%+ds%*i%...Bp%!0|
00000130 20 20 3d 20 28 b3 28 33 32 30 29 2d 31 29 2a 32 | = (.(320)-1)*2|
00000140 35 36 20 20 20 20 20 20 20 3a f4 20 78 20 63 6f |56 :. x co|
00000150 6f 72 64 20 69 6e 20 31 2f 32 35 36 74 68 73 20 |ord in 1/256ths |
00000160 6f 66 20 61 20 70 69 78 65 6c 0d 00 e6 2b 70 25 |of a pixel...+p%|
00000170 21 34 20 20 3d 20 28 b3 28 32 35 36 29 2d 31 29 |!4 = (.(256)-1)|
00000180 2a 32 35 36 20 20 20 20 20 20 20 3a f4 20 79 20 |*256 :. y |
00000190 63 6f 6f 72 64 0d 00 f0 42 70 25 21 38 20 20 3d |coord...Bp%!8 =|
000001a0 20 28 b3 28 31 36 33 38 34 29 2d 31 29 20 20 20 | (.(16384)-1) |
000001b0 20 20 20 20 20 20 3a f4 20 64 69 72 65 63 74 69 | :. directi|
000001c0 6f 6e 20 28 61 6e 20 69 6e 64 65 78 20 69 6e 74 |on (an index int|
000001d0 6f 20 74 72 69 67 29 0d 00 fa 38 70 25 21 31 32 |o trig)...8p%!12|
000001e0 20 3d 20 28 32 2a b3 28 32 29 2d 33 29 2a 32 36 | = (2*.(2)-3)*26|
000001f0 30 38 2f 28 b3 28 31 30 30 29 29 20 3a f4 20 61 |08/(.(100)) :. a|
00000200 6e 67 75 6c 61 72 20 76 65 6c 6f 63 69 74 79 0d |ngular velocity.|
00000210 01 04 3e 70 25 21 31 36 20 3d 20 b3 28 32 31 29 |..>p%!16 = .(21)|
00000220 2d 31 31 20 20 20 20 20 20 20 20 20 20 20 20 20 |-11 |
00000230 20 20 20 20 20 20 3a f4 20 61 6e 67 75 6c 61 72 | :. angular|
00000240 20 61 63 63 65 6c 65 72 61 74 69 6f 6e 0d 01 0e | acceleration...|
00000250 05 ed 0d 01 18 05 e1 0d 01 22 05 3a 0d 01 2c 0a |.........".:..,.|
00000260 dd 20 f2 61 73 73 0d 01 36 19 21 63 6f 64 65 25 |. .ass..6.!code%|
00000270 3d 31 34 38 3a 63 6f 64 65 25 21 34 3d 2d 31 0d |=148:code%!4=-1.|
00000280 01 40 28 c8 99 20 22 4f 53 5f 52 65 61 64 56 64 |.@(.. "OS_ReadVd|
00000290 75 56 61 72 69 61 62 6c 65 73 22 2c 63 6f 64 65 |uVariables",code|
000002a0 25 2c 63 6f 64 65 25 0d 01 4a 11 73 63 72 73 74 |%,code%..J.scrst|
000002b0 25 3d 21 63 6f 64 65 25 0d 01 54 0f 73 25 3d 30 |%=!code%..T.s%=0|
000002c0 3a 63 25 3d 32 35 36 0d 01 5e 3e 74 72 69 67 25 |:c%=256..^>trig%|
000002d0 21 30 20 20 20 20 20 20 20 20 20 20 20 20 20 20 |!0 |
000002e0 3d 20 28 28 20 20 73 25 20 80 36 35 35 33 35 29 |= (( s% .65535)|
000002f0 3c 3c 31 36 29 20 2b 20 28 20 20 63 25 20 80 36 |<<16) + ( c% .6|
00000300 35 35 33 35 29 0d 01 68 3e 74 72 69 67 25 21 28 |5535)..h>trig%!(|
00000310 34 2a 38 31 39 32 29 20 20 20 20 20 20 20 3d 20 |4*8192) = |
00000320 28 28 20 20 73 25 20 80 36 35 35 33 35 29 3c 3c |(( s% .65535)<<|
00000330 31 36 29 20 2b 20 28 28 2d 63 25 29 80 36 35 35 |16) + ((-c%).655|
00000340 33 35 29 0d 01 72 11 e3 20 69 25 3d 31 20 b8 20 |35)..r.. i%=1 . |
00000350 34 30 39 36 0d 01 7c 2c 73 25 3d 2d 32 35 36 2a |4096..|,s%=-256*|
00000360 b5 28 69 25 2a af 2f 38 31 39 32 29 3a 63 25 3d |.(i%*./8192):c%=|
00000370 32 35 36 2a 9b 28 69 25 2a af 2f 38 31 39 32 29 |256*.(i%*./8192)|
00000380 0d 01 86 3e 74 72 69 67 25 21 28 34 2a 69 25 29 |...>trig%!(4*i%)|
00000390 20 20 20 20 20 20 20 20 20 3d 20 28 28 20 20 73 | = (( s|
000003a0 25 20 80 36 35 35 33 35 29 3c 3c 31 36 29 20 2b |% .65535)<<16) +|
000003b0 20 28 20 20 63 25 20 80 36 35 35 33 35 29 0d 01 | ( c% .65535)..|
000003c0 90 3e 74 72 69 67 25 21 28 34 2a 28 38 31 39 32 |.>trig%!(4*(8192|
000003d0 2d 69 25 29 29 20 20 3d 20 28 28 20 20 73 25 20 |-i%)) = (( s% |
000003e0 80 36 35 35 33 35 29 3c 3c 31 36 29 20 2b 20 28 |.65535)<<16) + (|
000003f0 28 2d 63 25 29 80 36 35 35 33 35 29 0d 01 9a 3e |(-c%).65535)...>|
00000400 74 72 69 67 25 21 28 34 2a 28 38 31 39 32 2b 69 |trig%!(4*(8192+i|
00000410 25 29 29 20 20 3d 20 28 28 28 2d 73 25 29 80 36 |%)) = (((-s%).6|
00000420 35 35 33 35 29 3c 3c 31 36 29 20 2b 20 28 28 2d |5535)<<16) + ((-|
00000430 63 25 29 80 36 35 35 33 35 29 0d 01 a4 3e 74 72 |c%).65535)...>tr|
00000440 69 67 25 21 28 34 2a 28 31 36 33 38 34 2d 69 25 |ig%!(4*(16384-i%|
00000450 29 29 20 3d 20 28 28 28 2d 73 25 29 80 36 35 35 |)) = (((-s%).655|
00000460 33 35 29 3c 3c 31 36 29 20 2b 20 28 20 20 63 25 |35)<<16) + ( c%|
00000470 20 80 36 35 35 33 35 29 0d 01 ae 05 ed 0d 01 b8 | .65535)........|
00000480 05 3a 0d 01 c2 44 62 25 3d 34 20 3a 20 f4 20 50 |.:...Db%=4 : . P|
00000490 6c 6f 74 74 69 6e 67 20 63 6f 64 65 20 72 65 71 |lotting code req|
000004a0 75 69 72 65 73 20 6f 62 6a 65 63 74 73 20 6c 69 |uires objects li|
000004b0 65 20 66 75 6c 6c 79 20 77 69 74 68 69 6e 20 73 |e fully within s|
000004c0 63 72 65 65 6e 2e 0d 01 cc 40 20 20 20 20 20 20 |creen....@ |
000004d0 20 f4 20 62 25 20 65 6e 73 75 72 65 73 20 6f 62 | . b% ensures ob|
000004e0 6a 65 63 74 20 63 65 6e 74 72 65 73 20 6c 65 61 |ject centres lea|
000004f0 76 65 20 62 6f 72 64 65 72 20 6f 66 20 74 68 69 |ve border of thi|
00000500 73 20 6d 61 6e 79 0d 01 d6 39 20 20 20 20 20 20 |s many...9 |
00000510 20 f4 20 70 69 78 65 6c 73 20 66 72 6f 6d 20 65 | . pixels from e|
00000520 64 67 65 20 67 69 76 69 6e 67 20 72 6f 6f 6d 20 |dge giving room |
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00001470 4d 46 44 20 31 33 21 2c 20 7b 50 43 7d 20 20 20 |MFD 13!, {PC} |
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00001510 65 6e 0d 05 f0 3a 53 54 52 20 20 20 20 20 20 31 |en...:STR 1|
00001520 34 2c 20 61 6c 72 63 6c 73 25 20 20 20 20 20 20 |4, alrcls% |
00001530 20 20 20 3b 61 73 20 72 61 70 69 64 6c 79 20 61 | ;as rapidly a|
00001540 73 20 70 6f 73 73 69 62 6c 65 20 2d 0d 05 fa 3c |s possible -...<|
00001550 53 54 52 20 20 20 20 20 20 31 33 2c 20 61 73 70 |STR 13, asp|
00001560 63 6c 73 25 20 20 20 20 20 20 20 20 20 3b 6e 6f |cls% ;no|
00001570 74 65 20 74 68 65 20 68 65 61 76 79 20 75 73 65 |te the heavy use|
00001580 20 6f 66 20 53 54 4d 2e 0d 06 04 17 4c 44 52 20 | of STM.....LDR |
00001590 20 20 20 20 20 30 2c 20 61 73 63 72 73 74 25 0d | 0, ascrst%.|
000015a0 06 0e 14 4d 4f 56 20 20 20 20 20 20 31 2c 20 23 |...MOV 1, #|
000015b0 31 30 35 0d 06 18 12 4d 4f 56 20 20 20 20 20 20 |105....MOV |
000015c0 32 2c 20 23 30 0d 06 22 1b 84 52 20 20 20 20 20 |2, #0.."..R |
000015d0 20 32 2c 20 32 2c 20 32 2c 20 4c 53 4c 20 23 38 | 2, 2, 2, LSL #8|
000015e0 0d 06 2c 1c 84 52 20 20 20 20 20 20 32 2c 20 32 |..,..R 2, 2|
000015f0 2c 20 32 2c 20 4c 53 4c 20 23 31 36 0d 06 36 11 |, 2, LSL #16..6.|
00001600 4d 4f 56 20 20 20 20 20 20 33 2c 20 32 0d 06 40 |MOV 3, 2..@|
00001610 11 4d 4f 56 20 20 20 20 20 20 34 2c 20 32 0d 06 |.MOV 4, 2..|
00001620 4a 11 4d 4f 56 20 20 20 20 20 20 35 2c 20 32 0d |J.MOV 5, 2.|
00001630 06 54 11 4d 4f 56 20 20 20 20 20 20 36 2c 20 32 |.T.MOV 6, 2|
00001640 0d 06 5e 11 4d 4f 56 20 20 20 20 20 20 37 2c 20 |..^.MOV 7, |
00001650 32 0d 06 68 11 4d 4f 56 20 20 20 20 20 20 38 2c |2..h.MOV 8,|
00001660 20 32 0d 06 72 11 4d 4f 56 20 20 20 20 20 20 39 | 2..r.MOV 9|
00001670 2c 20 32 0d 06 7c 12 4d 4f 56 20 20 20 20 20 20 |, 2..|.MOV |
00001680 31 30 2c 20 32 0d 06 86 12 4d 4f 56 20 20 20 20 |10, 2....MOV |
00001690 20 20 31 31 2c 20 32 0d 06 90 12 4d 4f 56 20 20 | 11, 2....MOV |
000016a0 20 20 20 20 31 32 2c 20 32 0d 06 9a 12 4d 4f 56 | 12, 2....MOV|
000016b0 20 20 20 20 20 20 31 33 2c 20 32 0d 06 a4 12 4d | 13, 2....M|
000016c0 4f 56 20 20 20 20 20 20 31 34 2c 20 32 0d 06 ae |OV 14, 2...|
000016d0 0d 2e 63 6c 73 6c 6f 6f 70 25 0d 06 b8 17 53 54 |..clsloop%....ST|
000016e0 4d 49 41 20 20 20 20 30 21 2c 20 7b 32 2d 31 34 |MIA 0!, {2-14|
000016f0 7d 0d 06 c2 17 53 54 4d 49 41 20 20 20 20 30 21 |}....STMIA 0!|
00001700 2c 20 7b 32 2d 31 34 7d 0d 06 cc 17 53 54 4d 49 |, {2-14}....STMI|
00001710 41 20 20 20 20 30 21 2c 20 7b 32 2d 31 34 7d 0d |A 0!, {2-14}.|
00001720 06 d6 17 53 54 4d 49 41 20 20 20 20 30 21 2c 20 |...STMIA 0!, |
00001730 7b 32 2d 31 34 7d 0d 06 e0 17 53 54 4d 49 41 20 |{2-14}....STMIA |
00001740 20 20 20 30 21 2c 20 7b 32 2d 31 34 7d 0d 06 ea | 0!, {2-14}...|
00001750 17 53 54 4d 49 41 20 20 20 20 30 21 2c 20 7b 32 |.STMIA 0!, {2|
00001760 2d 31 34 7d 0d 06 f4 17 53 54 4d 49 41 20 20 20 |-14}....STMIA |
00001770 20 30 21 2c 20 7b 32 2d 31 34 7d 0d 06 fe 17 53 | 0!, {2-14}....S|
00001780 54 4d 49 41 20 20 20 20 30 21 2c 20 7b 32 2d 31 |TMIA 0!, {2-1|
00001790 34 7d 0d 07 08 17 53 54 4d 49 41 20 20 20 20 30 |4}....STMIA 0|
000017a0 21 2c 20 7b 32 2d 31 34 7d 0d 07 12 17 53 54 4d |!, {2-14}....STM|
000017b0 49 41 20 20 20 20 30 21 2c 20 7b 32 2d 31 34 7d |IA 0!, {2-14}|
000017c0 0d 07 1c 17 53 54 4d 49 41 20 20 20 20 30 21 2c |....STMIA 0!,|
000017d0 20 7b 32 2d 31 34 7d 0d 07 26 17 53 54 4d 49 41 | {2-14}..&.STMIA|
000017e0 20 20 20 20 30 21 2c 20 7b 32 2d 31 34 7d 0d 07 | 0!, {2-14}..|
000017f0 30 17 53 54 4d 49 41 20 20 20 20 30 21 2c 20 7b |0.STMIA 0!, {|
00001800 32 2d 31 34 7d 0d 07 3a 17 53 54 4d 49 41 20 20 |2-14}..:.STMIA |
00001810 20 20 30 21 2c 20 7b 32 2d 31 34 7d 0d 07 44 17 | 0!, {2-14}..D.|
00001820 53 54 4d 49 41 20 20 20 20 30 21 2c 20 7b 32 2d |STMIA 0!, {2-|
00001830 31 34 7d 0d 07 4e 15 53 55 42 53 20 20 20 20 20 |14}..N.SUBS |
00001840 31 2c 20 31 2c 20 23 31 0d 07 58 15 42 4e 45 20 |1, 1, #1..X.BNE |
00001850 20 20 20 20 20 63 6c 73 6c 6f 6f 70 25 0d 07 62 | clsloop%..b|
00001860 16 53 54 4d 49 41 20 20 20 20 30 21 2c 20 7b 32 |.STMIA 0!, {2|
00001870 2d 36 7d 0d 07 6c 18 4c 44 52 20 20 20 20 20 20 |-6}..l.LDR |
00001880 31 33 2c 20 61 73 70 63 6c 73 25 0d 07 76 18 4c |13, aspcls%..v.L|
00001890 44 52 20 20 20 20 20 20 50 43 2c 20 61 6c 72 63 |DR PC, alrc|
000018a0 6c 73 25 0d 07 80 05 5d 0d 07 8a 05 ed 0d 07 94 |ls%....]........|
000018b0 05 e1 0d ff |....|
000018b4 
.