Home » Archimedes archive » Archimedes World » AW-1997-02.adf » !AcornAns_AcornAns » RotAnim/Bouncer
RotAnim/Bouncer
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-1997-02.adf » !AcornAns_AcornAns |
| Filename: | RotAnim/Bouncer |
| Read OK: | ✔ |
| File size: | 1F5F bytes |
| Load address: | 0000 |
| Exec address: | 0000 |
File contents
10REM >Bouncer
20REM Purpose: Demo of fast sprite plotting for specific sprites,
30REM via simple animation of bouncing heads in a mode 12 screen.
40REM
50REM Coupled with sprite rotation via precalculation of rotated
60REM images.
70REM
80:
90REM NB program will produce a beep if animation speed falls
100REM below the target fps rate.
110targetfps% = 50
120IF 100MODtargetfps%<>0 ERROR 1, "Require targetfps divides into 100"
130:
140SYS &20280, 0, -1 TO ;flags%
150IF flags% AND 1 THEN arm3%=FALSE ELSE arm3%=TRUE
160:
170REM n% is the number of heads to be bounced
180n%=43
190IF arm3%=FALSE n%=n%/1.39
200recommend$=STR$n%
210:
220ON ERROR SYS 6,112,1:SYS 6,113,1:PRINT REPORT$;" at line ";ERL:END
230D% = RND(-TIME)
240MODE 12+128:MODE 12:OFF
250*Run Palette
260COLOUR 128+1:CLS
270DIM data% 1024*256
280SYS "OS_File", 255, "HeadData", data%, 0
290:
300maxn%=400
310DIM b% maxn%*20
320REM NB b% stores array (of size n%) of structure:
330REM {x coord, y coord, x increment, y increment, rotation phase}
340:
350DIM head% 30*4
360FOR i%=0 TO 14
370 head%!(4*i%) = data%+16384*i%
380 head%!(4*(i%+15)) = data%+16384*(15-i%)
390NEXT
400:
410PROCass
420:
430REPEAT
440 SYS 6,112,1:SYS 6,113,1
450 REPEAT
460 CLS
470 PRINT '"Please enter number of heads to bounce ("+recommend$+" recommended, "+STR$maxn%+" max) ";
480 INPUT n%
490 UNTIL n%<=maxn% AND n%>0
500 !an%=n%
510 :
520 REM initialise head locations & velocities
530 FOR i% = 0 TO n%*20-1 STEP 20
540 b%!(i%+0) = RND(1000) + 140
550 b%!(i%+4) = RND(700) + 0
560 b%!(i%+8) = RND(16)*(0.5+(RND(1)<0.5))
570 b%!(i%+12) = RND(08)*(0.5+(RND(1)<0.5))
580 b%!(i%+16) = RND(30)-1
590 NEXT
600 :
610 CALL bounce%
620 :
630UNTIL FALSE
640:
650END
660:
670DEF PROCass
680DIM code% 10240
690!code%=148:code%!4=-1
700SYS "OS_ReadVduVariables", code%, code%
710scrst%=!code%
720FOR pass% = 0 TO 2 STEP 2
730 P%=code%
740 [OPT pass%
750 .aspframe% EQUD 0
760 .ascrstsum% EQUD scrst%*2+81920
770 .an% EQUD 0
780 .ab% EQUD b%
790 .atime% EQUD 0 ;time storage for frame speed calc
800 .afc% EQUD 0 ;frame counter
810 .bounce%
820 STMFD 13!, {14}
830 STR 13, aspframe% ;store sp to free up r13
840 .nextframe%
850 :
860 SWI "OS_ReadMonotonicTime" ;track frame speed
870 STR 0, atime%
880 :
890 MOV 0, #19
900 SWI "OS_Byte" ;wait for vsync
910 MOV 0, #113
920 LDR 1, abank%
930 RSB 3, 1, #3
940 STR 3, abank%
950 SWI "OS_Byte" ;swap displayed screen bank
960 LDR 0, ascrstsum%
970 LDR 1, ascrst%
980 SUB 1, 0, 1
990 STR 1, ascrst% ;swap ptr to other bank
1000 BL cls% ;cls that bank to grey (colour 1)
1010 LDR 12, ab%
1020 LDR 13, an%
1030 .frameplotloop% ;now plot each head:
1040 LDMIA 12, {0,1} ; read x,y coords from data
1050 LDR 4, [12, #16]
1060 MOV 0, 0, ASR #1
1070 MOV 1, 1, ASR #2
1080 BL plot% ; plot head at x,y
1090 ADD 12, 12, #20
1100 SUBS 13, 13, #1
1110 BNE frameplotloop% ;then do next head
1120 LDR 11, afc%
1130 ADD 11, 11, #1
1140 STR 11, afc% ;update frame count
1150 LDR 12, ab%
1160 LDR 13, an%
1170 .framemoveloop% ;then move each head
1180 LDMIA 12, {0,1,2,3,4} ; read x,y,xi,yi,rt
1190 ADDS 0, 0, 2 ; alter x
1200 RSBMI 2, 2, #0 ; if off left side, reverse velocity
1210 ADDMI 0, 0, 2 ; & move back
1220 ADDS 1, 1, 3 ; alter y
1230 RSBMI 3, 3, #0 ; if off top side, reverse velocity
1240 ADDMI 1, 1, 3 ; & move back
1250 SUBS 14, 0, #1024 ; (these 2 instructs are equiv
1260 SUBGTS 14, 14, #142 ; to CMP 0, #1166)
1270 RSBGT 2, 2, #0 ; if off right, reverse velocity
1280 ADDGT 0, 0, 2 ; & move back
1290 CMP 1, #896
1300 RSBGT 3, 3, #0 ; if off bottom, reverse velocity
1310 ADDGT 1, 1, 3 ; & move back
1320 TST 11, #3 ; if frame count is a multiple of 4
1330 ADDEQ 3, 3, #1 ; accelerate head downwards
1340 SUBS 4, 4, #1
1350 MOVMI 4, #29
1360 STMIA 12!, {0,1,2,3,4} ; restore x,y,xi,yi,rt
1370 SUBS 13, 13, #1
1380 BNE framemoveloop% ;then do next head
1390 :
1400 SWI "OS_ReadMonotonicTime" ;calculate frame speed
1410 LDR 1, atime%
1420 SUB 0, 0, 1
1430 CMP 0, #100/targetfps%
1440 SWIGT 256+7 ;beep if it falls below target fps
1450 :
1460 MOV 0, #129
1470 MOV 1, #0
1480 MOV 2, #0
1490 SWI "OS_Byte"
1500 CMP 2, #&FF
1510 BEQ nextframe% ;if no key pressed, do next frame
1520 LDR 13, aspframe% ;restore sp
1530 LDMFD 13!, {PC} ;return to BASIC
1540 :
1550 .ascrst% EQUD scrst%
1560 .ahead% EQUD head%
1570 .abank% EQUD 1
1580 .aplotregs% EQUD 0:EQUD 0:EQUD 0
1590 .plot% ;plot our head sprite at coords r0,r1
1600 ;where 0,0 is top left & 639,255 is bottom right
1610 ;NB sprite MUST lie entirely within screen
1620 ADR 11, aplotregs%
1630 STMIA 11, {12,13,14}
1640 AND 3, 0, #7 ;calculate which of the 8 sprite
1650 ;alignments we need via:
1660 ;(xAND7)*32*64 + data%
1670 BIC 0, 0, #7 ;round x down to mult of 8
1680 ADD 1, 1, 1, ASL #2
1690 LDR 2, ascrst%
1700 ADD 2, 2, 1, ASL #6
1710 ADD 0, 2, 0, ASR #1 ;calc (screen ptr + 320y + x)
1720 LDR 1, ahead%
1730 LDR 1, [1, 4, ASL #2]
1740 ADD 1, 1, 3, ASL #11 ;finally calc (xAND7)*32*64+data%
1750 MOV 2, #8
1760 .loop1% ;now plot sprite
1770 FNfrag1(pass%) ;plot 1st half of 1st row
1780 FNfrag1(pass%) ; 2nd half of 1st row
1790 ADD 0, 0, #320-32 ;move screen ptr to start next row
1800 FNfrag1(pass%) ;plot 1st half of 2nd row
1810 FNfrag1(pass%) ; etc . . .
1820 ADD 0, 0, #320-32
1830 FNfrag1(pass%)
1840 FNfrag1(pass%)
1850 ADD 0, 0, #320-32
1860 FNfrag1(pass%)
1870 FNfrag1(pass%) ;plot 2nd half of 4th row
1880 ADD 0, 0, #320-32
1890 SUBS 2, 2, #1
1900 BNE loop1% ;repeat above 8 times to do all 32 rows
1910 ADR 11, aplotregs% ;plot completed - return to caller
1920 LDMIA 11, {12,13,PC} ;preserving r12 & r13.
1930 :
1940 .alrcls% EQUD 0
1950 .aspcls% EQUD 0
1960 .cls% ;simple routine to clear screen
1970 STR 14, alrcls% ;as rapidly as possible -
1980 STR 13, aspcls% ;note the heavy use of STM.
1990 LDR 0, ascrst%
2000 MOV 1, #105
2010 MOV 2, #&11
2020 ORR 2, 2, 2, LSL #8
2030 ORR 2, 2, 2, LSL #16
2040 MOV 3, 2
2050 MOV 4, 2
2060 MOV 5, 2
2070 MOV 6, 2
2080 MOV 7, 2
2090 MOV 8, 2
2100 MOV 9, 2
2110 MOV 10, 2
2120 MOV 11, 2
2130 MOV 12, 2
2140 MOV 13, 2
2150 MOV 14, 2
2160 .clsloop%
2170 STMIA 0!, {2-14}
2180 STMIA 0!, {2-14}
2190 STMIA 0!, {2-14}
2200 STMIA 0!, {2-14}
2210 STMIA 0!, {2-14}
2220 STMIA 0!, {2-14}
2230 STMIA 0!, {2-14}
2240 STMIA 0!, {2-14}
2250 STMIA 0!, {2-14}
2260 STMIA 0!, {2-14}
2270 STMIA 0!, {2-14}
2280 STMIA 0!, {2-14}
2290 STMIA 0!, {2-14}
2300 STMIA 0!, {2-14}
2310 STMIA 0!, {2-14}
2320 SUBS 1, 1, #1
2330 BNE clsloop%
2340 STMIA 0!, {2-6}
2350 LDR 13, aspcls%
2360 LDR PC, alrcls%
2370 ]
2380NEXT
2390ENDPROC
2400:
2410DEF FNfrag1(pass%) :REM macro to plot 1/2 a row (32 pixels)
2420[OPT pass% :REM of our sprite
2430LDMIA 0, {3-6} ;read 4 words of screen (32 pixels)
2440LDMIA 1!, {7-14} ;read 32 sprite pixels & 32 masks
2450AND 3, 3, 8 ;apply mask to screen, zeroing
2460AND 4, 4, 10 ; those bits where will write
2470AND 5, 5, 12 ; sprite image in a moment
2480AND 6, 6, 14
2490ORR 3, 3, 7 ;write in the sprite image
2500ORR 4, 4, 9
2510ORR 5, 5, 11
2520ORR 6, 6, 13
2530STMIA 0!, {3-6} ;restore the data back to screen
2540]
2550=pass%
� >Bouncer
A� Purpose: Demo of fast sprite plotting for specific sprites,
A� via simple animation of bouncing heads in a mode 12 screen.
(�
2@� Coupled with sprite rotation via precalculation of rotated
<
� images.
F�
P:
Z=� NB program will produce a beep if animation speed falls
d � below the target fps rate.
ntargetfps% = 50
xA� 100�targetfps%<>0 � 1, "Require targetfps divides into 100"
�:
� ș &20280, 0, -1 � ;flags%
�$� flags% � 1 � arm3%=� � arm3%=�
�:
�-� n% is the number of heads to be bounced
� n%=43
�� arm3%=� n%=n%/1.39
�recommend$=�n%
�:
�2� � ș 6,112,1:ș 6,113,1:� �$;" at line ";�:�
�D% = �(-�)
�� 12+128:� 12:�
�*Run Palette
� 128+1:�
� data% 1024*256
+ș "OS_File", 255, "HeadData", data%, 0
":
,
maxn%=400
6� b% maxn%*20
@3� NB b% stores array (of size n%) of structure:
JB� {x coord, y coord, x increment, y increment, rotation phase}
T:
^� head% 30*4
h� i%=0 � 14
r' head%!(4*i%) = data%+16384*i%
|, head%!(4*(i%+15)) = data%+16384*(15-i%)
��
�:
��ass
�:
��
� ș 6,112,1:ș 6,113,1
� �
� �
�` � '"Please enter number of heads to bounce ("+recommend$+" recommended, "+�maxn%+" max) ";
�
� n%
� � n%<=maxn% � n%>0
� !an%=n%
� :
- � initialise head locations & velocities
� i% = 0 � n%*20-1 � 20
! b%!(i%+0) = �(1000) + 140
& b%!(i%+4) = �(700) + 0
0* b%!(i%+8) = �(16)*(0.5+(�(1)<0.5))
:* b%!(i%+12) = �(08)*(0.5+(�(1)<0.5))
D b%!(i%+16) = �(30)-1
N �
X :
b � bounce%
l :
v� �
�:
��
�:
�
� �ass
�� code% 10240
�!code%=148:code%!4=-1
�*ș "OS_ReadVduVariables", code%, code%
�scrst%=!code%
�� pass% = 0 � 2 � 2
�
P%=code%
� [OPT pass%
� .aspframe% EQUD 0
�+ .ascrstsum% EQUD scrst%*2+81920
.an% EQUD 0
.ab% EQUD b%
D .atime% EQUD 0 ;time storage for frame speed calc
0 .afc% EQUD 0 ;frame counter
*
.bounce%
4 STMFD 13!, {14}
>: STR 13, aspframe% ;store sp to free up r13
H .nextframe%
R :
\> SWI "OS_ReadMonotonicTime" ;track frame speed
f STR 0, atime%
p :
z MOV 0, #19
�; SWI "OS_Byte" ;wait for vsync
� MOV 0, #113
� LDR 1, abank%
� RSB 3, 1, #3
� STR 3, abank%
�= SWI "OS_Byte" ;swap displayed screen bank
� LDR 0, ascrstsum%
� LDR 1, ascrst%
� SUB 1, 0, 1
�9 STR 1, ascrst% ;swap ptr to other bank
�C BL cls% ;cls that bank to grey (colour 1)
� LDR 12, ab%
� LDR 13, an%
6 .frameplotloop% ;now plot each head:
= LDMIA 12, {0,1} ; read x,y coords from data
LDR 4, [12, #16]
$ MOV 0, 0, ASR #1
. MOV 1, 1, ASR #2
84 BL plot% ; plot head at x,y
B ADD 12, 12, #20
L SUBS 13, 13, #1
V4 BNE frameplotloop% ;then do next head
` LDR 11, afc%
j ADD 11, 11, #1
t5 STR 11, afc% ;update frame count
~ LDR 12, ab%
� LDR 13, an%
�6 .framemoveloop% ;then move each head
�5 LDMIA 12, {0,1,2,3,4} ; read x,y,xi,yi,rt
�+ ADDS 0, 0, 2 ; alter x
�F RSBMI 2, 2, #0 ; if off left side, reverse velocity
�/ ADDMI 0, 0, 2 ; & move back
�+ ADDS 1, 1, 3 ; alter y
�E RSBMI 3, 3, #0 ; if off top side, reverse velocity
�/ ADDMI 1, 1, 3 ; & move back
�@ SUBS 14, 0, #1024 ; (these 2 instructs are equiv
�5 SUBGTS 14, 14, #142 ; to CMP 0, #1166)
�B RSBGT 2, 2, #0 ; if off right, reverse velocity
/ ADDGT 0, 0, 2 ; & move back
CMP 1, #896
C RSBGT 3, 3, #0 ; if off bottom, reverse velocity
/ ADDGT 1, 1, 3 ; & move back
(E TST 11, #3 ; if frame count is a multiple of 4
2= ADDEQ 3, 3, #1 ; accelerate head downwards
< SUBS 4, 4, #1
F MOVMI 4, #29
P8 STMIA 12!, {0,1,2,3,4} ; restore x,y,xi,yi,rt
Z SUBS 13, 13, #1
d4 BNE framemoveloop% ;then do next head
n :
xB SWI "OS_ReadMonotonicTime" ;calculate frame speed
� LDR 1, atime%
� SUB 0, 0, 1
� CMP 0, #100/targetfps%
�D SWIGT 256+7 ;beep if it falls below target fps
� :
� MOV 0, #129
� MOV 1, #0
� MOV 2, #0
� SWI "OS_Byte"
� CMP 2, #&FF
�C BEQ nextframe% ;if no key pressed, do next frame
�- LDR 13, aspframe% ;restore sp
�2 LDMFD 13!, {PC} ;return to BASIC
:
.ascrst% EQUD scrst%
.ahead% EQUD head%
" .abank% EQUD 1
,, .aplotregs% EQUD 0:EQUD 0:EQUD 0
63 .plot% ;plot our head sprite at coords r0,r1
@> ;where 0,0 is top left & 639,255 is bottom right
J8 ;NB sprite MUST lie entirely within screen
T ADR 11, aplotregs%
^ STMIA 11, {12,13,14}
h@ � 3, 0, #7 ;calculate which of the 8 sprite
r: ;alignments we need via:
|8 ;(xAND7)*32*64 + data%
�< BIC 0, 0, #7 ;round x down to mult of 8
� ADD 1, 1, 1, ASL #2
� LDR 2, ascrst%
� ADD 2, 2, 1, ASL #6
�? ADD 0, 2, 0, ASR #1 ;calc (screen ptr + 320y + x)
� LDR 1, ahead%
� LDR 1, [1, 4, ASL #2]
�C ADD 1, 1, 3, ASL #11 ;finally calc (xAND7)*32*64+data%
� MOV 2, #8
�2 .loop1% ;now plot sprite
�: �frag1(pass%) ;plot 1st half of 1st row
�: �frag1(pass%) ; 2nd half of 1st row
�D ADD 0, 0, #320-32 ;move screen ptr to start next row
: �frag1(pass%) ;plot 1st half of 2nd row
, �frag1(pass%) ; etc . . .
ADD 0, 0, #320-32
& �frag1(pass%)
0 �frag1(pass%)
: ADD 0, 0, #320-32
D �frag1(pass%)
N: �frag1(pass%) ;plot 2nd half of 4th row
X ADD 0, 0, #320-32
b SUBS 2, 2, #1
lE BNE loop1% ;repeat above 8 times to do all 32 rows
vD ADR 11, aplotregs% ;plot completed - return to caller
�8 LDMIA 11, {12,13,PC} ;preserving r12 & r13.
� :
� .alrcls% EQUD 0
� .aspcls% EQUD 0
�A .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, #&11
� �R 2, 2, 2, LSL #8
� �R 2, 2, 2, LSL #16
� MOV 3, 2
MOV 4, 2
MOV 5, 2
MOV 6, 2
MOV 7, 2
* MOV 8, 2
4 MOV 9, 2
> MOV 10, 2
H MOV 11, 2
R MOV 12, 2
\ MOV 13, 2
f MOV 14, 2
p .clsloop%
z 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}
� STMIA 0!, {2-14}
� STMIA 0!, {2-14}
STMIA 0!, {2-14}
SUBS 1, 1, #1
BNE clsloop%
$ STMIA 0!, {2-6}
. LDR 13, aspcls%
8 LDR PC, alrcls%
B ]
L�
V�
`:
j@� �frag1(pass%) :� macro to plot 1/2 a row (32 pixels)
t-[OPT pass% :� of our sprite
~ELDMIA 0, {3-6} ;read 4 words of screen (32 pixels)
�CLDMIA 1!, {7-14} ;read 32 sprite pixels & 32 masks
�>� 3, 3, 8 ;apply mask to screen, zeroing
�=� 4, 4, 10 ; those bits where will write
�:� 5, 5, 12 ; sprite image in a moment
�� 6, 6, 14
�;�R 3, 3, 7 ;write in the sprite image
��R 4, 4, 9
��R 5, 5, 11
��R 6, 6, 13
�BSTMIA 0!, {3-6} ;restore the data back to screen
�]
�
=pass%
� 00000000 0d 00 0a 0e f4 20 3e 42 6f 75 6e 63 65 72 0d 00 |..... >Bouncer..|
00000010 14 41 f4 20 50 75 72 70 6f 73 65 3a 20 44 65 6d |.A. Purpose: Dem|
00000020 6f 20 6f 66 20 66 61 73 74 20 73 70 72 69 74 65 |o of fast sprite|
00000030 20 70 6c 6f 74 74 69 6e 67 20 66 6f 72 20 73 70 | plotting for sp|
00000040 65 63 69 66 69 63 20 73 70 72 69 74 65 73 2c 0d |ecific sprites,.|
00000050 00 1e 41 f4 20 76 69 61 20 73 69 6d 70 6c 65 20 |..A. via simple |
00000060 61 6e 69 6d 61 74 69 6f 6e 20 6f 66 20 62 6f 75 |animation of bou|
00000070 6e 63 69 6e 67 20 68 65 61 64 73 20 69 6e 20 61 |ncing heads in a|
00000080 20 6d 6f 64 65 20 31 32 20 73 63 72 65 65 6e 2e | mode 12 screen.|
00000090 0d 00 28 05 f4 0d 00 32 40 f4 20 43 6f 75 70 6c |..(....2@. Coupl|
000000a0 65 64 20 77 69 74 68 20 73 70 72 69 74 65 20 72 |ed with sprite r|
000000b0 6f 74 61 74 69 6f 6e 20 76 69 61 20 70 72 65 63 |otation via prec|
000000c0 61 6c 63 75 6c 61 74 69 6f 6e 20 6f 66 20 72 6f |alculation of ro|
000000d0 74 61 74 65 64 0d 00 3c 0d f4 20 69 6d 61 67 65 |tated..<.. image|
000000e0 73 2e 0d 00 46 05 f4 0d 00 50 05 3a 0d 00 5a 3d |s...F....P.:..Z=|
000000f0 f4 20 4e 42 20 70 72 6f 67 72 61 6d 20 77 69 6c |. NB program wil|
00000100 6c 20 70 72 6f 64 75 63 65 20 61 20 62 65 65 70 |l produce a beep|
00000110 20 69 66 20 61 6e 69 6d 61 74 69 6f 6e 20 73 70 | if animation sp|
00000120 65 65 64 20 66 61 6c 6c 73 0d 00 64 20 f4 20 62 |eed falls..d . b|
00000130 65 6c 6f 77 20 74 68 65 20 74 61 72 67 65 74 20 |elow the target |
00000140 66 70 73 20 72 61 74 65 2e 0d 00 6e 13 74 61 72 |fps rate...n.tar|
00000150 67 65 74 66 70 73 25 20 3d 20 35 30 0d 00 78 41 |getfps% = 50..xA|
00000160 e7 20 31 30 30 83 74 61 72 67 65 74 66 70 73 25 |. 100.targetfps%|
00000170 3c 3e 30 20 85 20 31 2c 20 22 52 65 71 75 69 72 |<>0 . 1, "Requir|
00000180 65 20 74 61 72 67 65 74 66 70 73 20 64 69 76 69 |e targetfps divi|
00000190 64 65 73 20 69 6e 74 6f 20 31 30 30 22 0d 00 82 |des into 100"...|
000001a0 05 3a 0d 00 8c 1e c8 99 20 26 32 30 32 38 30 2c |.:...... &20280,|
000001b0 20 30 2c 20 2d 31 20 b8 20 3b 66 6c 61 67 73 25 | 0, -1 . ;flags%|
000001c0 0d 00 96 24 e7 20 66 6c 61 67 73 25 20 80 20 31 |...$. flags% . 1|
000001d0 20 8c 20 61 72 6d 33 25 3d a3 20 8b 20 61 72 6d | . arm3%=. . arm|
000001e0 33 25 3d b9 0d 00 a0 05 3a 0d 00 aa 2d f4 20 6e |3%=.....:...-. n|
000001f0 25 20 69 73 20 74 68 65 20 6e 75 6d 62 65 72 20 |% is the number |
00000200 6f 66 20 68 65 61 64 73 20 74 6f 20 62 65 20 62 |of heads to be b|
00000210 6f 75 6e 63 65 64 0d 00 b4 09 6e 25 3d 34 33 0d |ounced....n%=43.|
00000220 00 be 18 e7 20 61 72 6d 33 25 3d a3 20 6e 25 3d |.... arm3%=. n%=|
00000230 6e 25 2f 31 2e 33 39 0d 00 c8 12 72 65 63 6f 6d |n%/1.39....recom|
00000240 6d 65 6e 64 24 3d c3 6e 25 0d 00 d2 05 3a 0d 00 |mend$=.n%....:..|
00000250 dc 32 ee 20 85 20 c8 99 20 36 2c 31 31 32 2c 31 |.2. . .. 6,112,1|
00000260 3a c8 99 20 36 2c 31 31 33 2c 31 3a f1 20 f6 24 |:.. 6,113,1:. .$|
00000270 3b 22 20 61 74 20 6c 69 6e 65 20 22 3b 9e 3a e0 |;" at line ";.:.|
00000280 0d 00 e6 0e 44 25 20 3d 20 b3 28 2d 91 29 0d 00 |....D% = .(-.)..|
00000290 f0 13 eb 20 31 32 2b 31 32 38 3a eb 20 31 32 3a |... 12+128:. 12:|
000002a0 87 0d 00 fa 10 2a 52 75 6e 20 50 61 6c 65 74 74 |.....*Run Palett|
000002b0 65 0d 01 04 0d fb 20 31 32 38 2b 31 3a db 0d 01 |e..... 128+1:...|
000002c0 0e 14 de 20 64 61 74 61 25 20 31 30 32 34 2a 32 |... data% 1024*2|
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00000c90 20 41 44 44 53 20 20 20 20 20 30 2c 20 30 2c 20 | ADDS 0, 0, |
00000ca0 32 20 20 20 20 20 20 20 20 20 20 20 20 20 3b 20 |2 ; |
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00000cc0 49 20 20 20 20 32 2c 20 32 2c 20 23 30 20 20 20 |I 2, 2, #0 |
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00000e20 20 23 31 34 32 20 20 20 20 20 20 20 20 3b 20 20 | #142 ; |
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00000e50 20 32 2c 20 23 30 20 20 20 20 20 20 20 20 20 20 | 2, #0 |
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00000f60 72 61 6d 65 20 63 6f 75 6e 74 20 69 73 20 61 20 |rame count is a |
00000f70 6d 75 6c 74 69 70 6c 65 20 6f 66 20 34 0d 05 32 |multiple of 4..2|
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00000f90 20 23 31 20 20 20 20 20 20 20 20 20 20 20 20 3b | #1 ;|
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00000fb0 20 64 6f 77 6e 77 61 72 64 73 0d 05 3c 16 20 53 | downwards..<. S|
00000fc0 55 42 53 20 20 20 20 20 34 2c 20 34 2c 20 23 31 |UBS 4, 4, #1|
00000fd0 0d 05 46 14 20 4d 4f 56 4d 49 20 20 20 20 34 2c |..F. MOVMI 4,|
00000fe0 20 23 32 39 0d 05 50 38 20 53 54 4d 49 41 20 20 | #29..P8 STMIA |
00000ff0 20 20 31 32 21 2c 20 7b 30 2c 31 2c 32 2c 33 2c | 12!, {0,1,2,3,|
00001000 34 7d 20 20 20 20 3b 20 72 65 73 74 6f 72 65 20 |4} ; restore |
00001010 78 2c 79 2c 78 69 2c 79 69 2c 72 74 0d 05 5a 18 |x,y,xi,yi,rt..Z.|
00001020 20 53 55 42 53 20 20 20 20 20 31 33 2c 20 31 33 | SUBS 13, 13|
00001030 2c 20 23 31 0d 05 64 34 20 42 4e 45 20 20 20 20 |, #1..d4 BNE |
00001040 20 20 66 72 61 6d 65 6d 6f 76 65 6c 6f 6f 70 25 | framemoveloop%|
00001050 20 20 20 20 20 20 3b 74 68 65 6e 20 64 6f 20 6e | ;then do n|
00001060 65 78 74 20 68 65 61 64 0d 05 6e 06 20 3a 0d 05 |ext head..n. :..|
00001070 78 42 20 53 57 49 20 20 20 20 20 20 22 4f 53 5f |xB SWI "OS_|
00001080 52 65 61 64 4d 6f 6e 6f 74 6f 6e 69 63 54 69 6d |ReadMonotonicTim|
00001090 65 22 20 20 20 20 20 20 20 20 3b 63 61 6c 63 75 |e" ;calcu|
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000010f0 30 2f 74 61 72 67 65 74 66 70 73 25 0d 05 a0 44 |0/targetfps%...D|
00001100 20 53 57 49 47 54 20 20 20 20 32 35 36 2b 37 20 | SWIGT 256+7 |
00001110 20 20 20 20 20 20 20 20 20 20 20 20 20 20 3b 62 | ;b|
00001120 65 65 70 20 69 66 20 69 74 20 66 61 6c 6c 73 20 |eep if it falls |
00001130 62 65 6c 6f 77 20 74 61 72 67 65 74 20 66 70 73 |below target fps|
00001140 0d 05 aa 06 20 3a 0d 05 b4 15 20 4d 4f 56 20 20 |.... :.... MOV |
00001150 20 20 20 20 30 2c 20 23 31 32 39 0d 05 be 13 20 | 0, #129.... |
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00001170 c8 13 20 4d 4f 56 20 20 20 20 20 20 32 2c 20 23 |.. MOV 2, #|
00001180 30 0d 05 d2 17 20 53 57 49 20 20 20 20 20 20 22 |0.... SWI "|
00001190 4f 53 5f 42 79 74 65 22 0d 05 dc 15 20 43 4d 50 |OS_Byte".... CMP|
000011a0 20 20 20 20 20 20 32 2c 20 23 26 46 46 0d 05 e6 | 2, #&FF...|
000011b0 43 20 42 45 51 20 20 20 20 20 20 6e 65 78 74 66 |C BEQ nextf|
000011c0 72 61 6d 65 25 20 20 20 20 20 20 20 20 20 20 3b |rame% ;|
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00001220 32 20 4c 44 4d 46 44 20 20 20 20 31 33 21 2c 20 |2 LDMFD 13!, |
00001230 7b 50 43 7d 20 20 20 20 20 20 20 20 20 20 20 3b |{PC} ;|
00001240 72 65 74 75 72 6e 20 74 6f 20 42 41 53 49 43 0d |return to BASIC.|
00001250 06 04 06 20 3a 0d 06 0e 19 20 2e 61 73 63 72 73 |... :.... .ascrs|
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