P/BatBall

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P/BatBall

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 » Personal collection » Acorn ADFS disks » Electron_User_Group » EUG_39.ADF
Filename:	P/BatBall
Read OK:	✔
File size:	0D6D bytes
Load address:	FFFF1D00
Exec address:	FFFF8023

Duplicates

There are 2 duplicate copies of this file in the archive:

Personal collection » Acorn ADFS disks » Electron_User_Group » EUG_39.ADF » P/BatBall
Personal collection » Acorn ADFS disks » Greaseweazled » dfs_box04_disk02b_eug_scripts.adf » PT4/P/BatBall2
Personal collection » Acorn hard disk » zipped_disks » elk03 » eug39/P/BatBall

File contents

   10 MODE2:HIMEM=&2F00:PROCasschar
   20 REM Put your program code here!
   30 PROCsetpaint(3)
   40 DIMblok%(19,9)
   50 ?xoff=0:?yoff=0:FORx=0TO19:FORy=0TO9:?char=1+RND(2):?xc=x:?yc=y:CALLdisplay:NEXT:NEXT
   60 xball=37:yball=100:up=FALSE:left=FALSE
   70 xbat=9
   80 ?char=4:?xc=9:?yc=30:?xoff=0:?yoff=0:CALLdisplay:?xc=10:?char=5:CALLdisplay
   90 ?char=0:?xc=xball DIV4:?yc=yball DIV8:?xoff=xball AND3:?yoff=yball AND7:CALLdisplay
  100 REPEAT
  110 IF left THEN xnew=xball-2 ELSE xnew=xball+2
  120 IF up THEN ynew=yball-4 ELSE ynew=yball+4
  130 IF ynew<4 THEN up=FALSE
  140 IF ynew=248 THEN VDU7:REPEAT UNTIL INKEY(-99):xnew=37:ynew=100
  150 IF xnew=1 THEN left=FALSE
  160 IF xnew=75 THEN left=TRUE
  170 ?char=0:?xc=xball DIV4:?yc=yball DIV8:?xoff=xball AND3:?yoff=yball AND7:CALLdisplay
  180 xball=xnew:yball=ynew
  190 ?char=0:?xc=xball DIV4:?yc=yball DIV8:?xoff=xball AND3:?yoff=yball AND7:CALLdisplay
  200 IF yball=232 AND (xball>(xbat-2)*4) AND (xball<(xbat+2)*4) THEN up=TRUE
  210 IF yball>80 THEN GOTO 330
  220 xb%=xball DIV4:yb%=yball DIV8:PROCsetpaint(0)
  230 IF up AND yb%<>0 THEN IF blok%(xb%,yb%-1)=0THENup=FALSE:blok%(xb%,yb%-1)=1:?char=6:?xc=xb%:?yc=yb%-1:?xoff=0:?yoff=0:CALLdisplay
  240 IF up AND left AND yb%<>0 AND xb%<>0 THEN IF blok%(xb%-1,yb%-1)=0THENup=FALSE:left=FALSE:blok%(xb%-1,yb%-1)=1:?char=6:?xc=xb%-1:?yc=yb%-1:?xoff=0:?yoff=0:CALLdisplay
  250 IF up AND (NOT left) AND yb%<>0 AND xb%<19 THEN IF blok%(xb%+1,yb%-1)=0THENup=FALSE:left=TRUE:blok%(xb%+1,yb%-1)=1:?char=6:?xc=xb%+1:?yc=yb%-1:?xoff=0:?yoff=0:CALLdisplay
  260 IF NOT up AND yb%<9 THEN IF blok%(xb%,yb%+1)=0THENup=TRUE:blok%(xb%,yb%+1)=1:?char=6:?xc=xb%:?yc=yb%+1:?xoff=0:?yoff=0:CALLdisplay
  270 IF (NOT up) AND left AND xb%<>0 AND yb%<9 THEN IF blok%(xb%-1,yb%+1)=0THENup=TRUE:left=FALSE:blok%(xb%-1,yb%+1)=1:?char=6:?xc=xb%-1:?yc=yb%+1:?xoff=0:?yoff=0:CALLdisplay
  280 IF (NOT up) AND (NOT left) AND xb%<19 AND yb%<9 THEN IF blok%(xb%+1,yb%+1)=0THENup=TRUE:left=TRUE:blok%(xb%+1,yb%+1)=1:?char=6:?xc=xb%+1:?yc=yb%+1:?xoff=0:?yoff=0:CALLdisplay
  290 IF yb%>9 THEN GOTO 320
  300 IF left AND xb%<>0 THEN IF blok%(xb%-1,yb%)=0THENleft=FALSE:blok%(xb%-1,yb%)=1:?char=6:?xc=xb%-1:?yc=yb%:?xoff=0:?yoff=0:CALLdisplay
  310 IF NOT left AND xb%<19 THEN IF blok%(xb%+1,yb%)=0THENleft=TRUE:blok%(xb%+1,yb%)=1:?char=6:?xc=xb%+1:?yc=yb%:?xoff=0:?yoff=0:CALLdisplay
  320 PROCsetpaint(3)
  330 xnew=-1:IF INKEY(-98) AND xbat<>0 THEN xnew=xbat-0.5
  340 IF INKEY(-67) AND xbat<>18 THEN xnew=xbat+0.5
  350 IF xnew=-1 THEN UNTIL FALSE
  360 ?char=4:?xc=INT(xbat):?yc=30:?xoff=(xbat*4)AND2:?yoff=0:CALLdisplay:?xc=?xc+1:?char=5:CALLdisplay
  370 xbat=xnew
  380 ?char=4:?xc=INT(xbat):?xoff=(xbat*4)AND2:CALLdisplay:?xc=?xc+1:?char=5:CALLdisplay
  390 UNTIL FALSE
  400 END
  410 :
  420 DEFPROCasschar
  430 start=&C00:bitmap=&2F00:file$="B+B"
  440 FORpass=0 TO 2 STEP 2
  450 P%=start:[OPTpass
  460 .display LDAyc:AND#1:TAY:LDAlorow,Y:STA&70:LDAyc:LSR A:CLC:ADCyc:ADCyc:ADC#&30:STA&71:LDAxc:ASL A:STA&72:LDA#0:ROL A:STA&73:ASL&72:ROL&73:ASL&72:ROL&73:ASL&72:ROL&73:ASL&72:ROL&73:LDA&70:CLC:ADC&72:STA&70:LDA&71:ADC&73:STA&71
  470 LDA&70:CLC:ADCyoff:STA&70:LDA&71:ADC#0:STA&71:LDAxoff:ASL A:ASL A:ASL A:CLC:ADC&70:STA&70:LDA&71:ADC#0:STA&71
  480 LDAchar:ASL A:ASL A:ASL A:STA&72:LDA#0:ROL A:STA&73:ASL&72:ROL&73:ASL&72:ROL&73:LDA&72:CLC:ADC#(bitmap MOD 256):STA&72:LDA&73:ADC#(bitmap DIV 256):STA&73
  490 LDA#8:PHA:.col LDX#3:.row TXA:ASL A:ASL A:ASL A:TAY:LDA(&70),Y:.settype LDA(&72),Y:STA(&70),Y:DEX:BPLrow:PLA:TAX:DEX:CPX#0:BEQfindisp:TXA:PHA:INC&72:LDA&70:CLC:ADC#1:PHA:STA&70:LDA&71:ADC#0:STA&71:PLA:AND#7:BNEcol
  500 LDA&70:CLC:ADC#&78:STA&70:LDA&71:ADC#2:STA&71:JMPcol
  510 .findisp RTS
  520 .lorow EQUB0:EQUB&80:.xc EQUB0:.yc EQUB0:.xoff EQUB0:.yoff EQUB0:.char EQUB0
  530 ]:NEXT:OSCLI"LOAD "+file$+" 2F00"
  540 ENDPROC
  550 :
  560 DEFPROCsetpaint(type)
  570 IF type=0 THEN ?settype=&B1
  580 IF type=1 THEN ?settype=&11
  590 IF type=2 THEN ?settype=&31
  600 IF type=3 THEN ?settype=&51
  610 ENDPROC


 �2:�=&2F00:�asschar
" � Put your program code here!
 �setpaint(3)
( �blok%(19,9)
2I ?xoff=0:?yoff=0:�x=0�19:�y=0�9:?char=1+�(2):?xc=x:?yc=y:�display:�:�
<# xball=37:yball=100:up=�:left=�
F xbat=9
PJ ?char=4:?xc=9:?yc=30:?xoff=0:?yoff=0:�display:?xc=10:?char=5:�display
ZM ?char=0:?xc=xball �4:?yc=yball �8:?xoff=xball �3:?yoff=yball �7:�display
d �
n) � left � xnew=xball-2 � xnew=xball+2
x' � up � ynew=yball-4 � ynew=yball+4
� � ynew<4 � up=�
�0 � ynew=248 � �7:� � �(-99):xnew=37:ynew=100
� � xnew=1 � left=�
� � xnew=75 � left=�
�M ?char=0:?xc=xball �4:?yc=yball �8:?xoff=xball �3:?yoff=yball �7:�display
� xball=xnew:yball=ynew
�M ?char=0:?xc=xball �4:?yc=yball �8:?xoff=xball �3:?yoff=yball �7:�display
�A � yball=232 � (xball>(xbat-2)*4) � (xball<(xbat+2)*4) � up=�
� � yball>80 � � �DJA
�+ xb%=xball �4:yb%=yball �8:�setpaint(0)
�t � up � yb%<>0 � � blok%(xb%,yb%-1)=0�up=�:blok%(xb%,yb%-1)=1:?char=6:?xc=xb%:?yc=yb%-1:?xoff=0:?yoff=0:�display
� � up � left � yb%<>0 � xb%<>0 � � blok%(xb%-1,yb%-1)=0�up=�:left=�:blok%(xb%-1,yb%-1)=1:?char=6:?xc=xb%-1:?yc=yb%-1:?xoff=0:?yoff=0:�display
�� � up � (� left) � yb%<>0 � xb%<19 � � blok%(xb%+1,yb%-1)=0�up=�:left=�:blok%(xb%+1,yb%-1)=1:?char=6:?xc=xb%+1:?yc=yb%-1:?xoff=0:?yoff=0:�display
u � � up � yb%<9 � � blok%(xb%,yb%+1)=0�up=�:blok%(xb%,yb%+1)=1:?char=6:?xc=xb%:?yc=yb%+1:?xoff=0:?yoff=0:�display
� � (� up) � left � xb%<>0 � yb%<9 � � blok%(xb%-1,yb%+1)=0�up=�:left=�:blok%(xb%-1,yb%+1)=1:?char=6:?xc=xb%-1:?yc=yb%+1:?xoff=0:?yoff=0:�display
� � (� up) � (� left) � xb%<19 � yb%<9 � � blok%(xb%+1,yb%+1)=0�up=�:left=�:blok%(xb%+1,yb%+1)=1:?char=6:?xc=xb%+1:?yc=yb%+1:?xoff=0:?yoff=0:�display
" � yb%>9 � � �D@A
,x � left � xb%<>0 � � blok%(xb%-1,yb%)=0�left=�:blok%(xb%-1,yb%)=1:?char=6:?xc=xb%-1:?yc=yb%:?xoff=0:?yoff=0:�display
6z � � left � xb%<19 � � blok%(xb%+1,yb%)=0�left=�:blok%(xb%+1,yb%)=1:?char=6:?xc=xb%+1:?yc=yb%:?xoff=0:?yoff=0:�display
@ �setpaint(3)
J/ xnew=-1:� �(-98) � xbat<>0 � xnew=xbat-0.5
T( � �(-67) � xbat<>18 � xnew=xbat+0.5
^ � xnew=-1 � � �
h\ ?char=4:?xc=�(xbat):?yc=30:?xoff=(xbat*4)�2:?yoff=0:�display:?xc=?xc+1:?char=5:�display
r xbat=xnew
|M ?char=4:?xc=�(xbat):?xoff=(xbat*4)�2:�display:?xc=?xc+1:?char=5:�display
� � �
� �
� :
� ��asschar
�( start=&C00:bitmap=&2F00:file$="B+B"
� �pass=0 � 2 � 2
� P%=start:[OPTpass
�� .display LDAyc:�#1:TAY:LDAlorow,Y:STA&70:LDAyc:LSR A:CLC:ADCyc:ADCyc:ADC#&30:STA&71:LDAxc:ASL A:STA&72:LDA#0:ROL A:STA&73:ASL&72:ROL&73:ASL&72:ROL&73:ASL&72:ROL&73:ASL&72:ROL&73:LDA&70:CLC:ADC&72:STA&70:LDA&71:ADC&73:STA&71
�r LDA&70:CLC:ADCyoff:STA&70:LDA&71:ADC#0:STA&71:LDAxoff:ASL A:ASL A:ASL A:CLC:ADC&70:STA&70:LDA&71:ADC#0:STA&71
� LDAchar:ASL A:ASL A:ASL A:STA&72:LDA#0:ROL A:STA&73:ASL&72:ROL&73:ASL&72:ROL&73:LDA&72:CLC:ADC#(bitmap � 256):STA&72:LDA&73:ADC#(bitmap � 256):STA&73
�� LDA#8:PHA:.col LDX#3:.row TXA:ASL A:ASL A:ASL A:TAY:LDA(&70),Y:.settype LDA(&72),Y:STA(&70),Y:DEX:BPLrow:PLA:TAX:DEX:CPX#0:BEQfindisp:TXA:PHA:INC&72:LDA&70:CLC:ADC#1:PHA:STA&70:LDA&71:ADC#0:STA&71:PLA:�#7:BNEcol
�9 LDA&70:CLC:ADC#&78:STA&70:LDA&71:ADC#2:STA&71:JMPcol
� .findisp RTS
Q .lorow EQUB0:EQUB&80:.xc EQUB0:.yc EQUB0:.xoff EQUB0:.yoff EQUB0:.char EQUB0
 ]:�:�"LOAD "+file$+" 2F00"
 �
& :
0 ��setpaint(type)
: � type=0 � ?settype=&B1
D � type=1 � ?settype=&11
N � type=2 � ?settype=&31
X � type=3 � ?settype=&51
b �
�

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00000010  f2 61 73 73 63 68 61 72  0d 00 14 22 20 f4 20 50  |.asschar..." . P|
00000020  75 74 20 79 6f 75 72 20  70 72 6f 67 72 61 6d 20  |ut your program |
00000030  63 6f 64 65 20 68 65 72  65 21 0d 00 1e 11 20 f2  |code here!.... .|
00000040  73 65 74 70 61 69 6e 74  28 33 29 0d 00 28 11 20  |setpaint(3)..(. |
00000050  de 62 6c 6f 6b 25 28 31  39 2c 39 29 0d 00 32 49  |.blok%(19,9)..2I|
00000060  20 3f 78 6f 66 66 3d 30  3a 3f 79 6f 66 66 3d 30  | ?xoff=0:?yoff=0|
00000070  3a e3 78 3d 30 b8 31 39  3a e3 79 3d 30 b8 39 3a  |:.x=0.19:.y=0.9:|
00000080  3f 63 68 61 72 3d 31 2b  b3 28 32 29 3a 3f 78 63  |?char=1+.(2):?xc|
00000090  3d 78 3a 3f 79 63 3d 79  3a d6 64 69 73 70 6c 61  |=x:?yc=y:.displa|
000000a0  79 3a ed 3a ed 0d 00 3c  23 20 78 62 61 6c 6c 3d  |y:.:...<# xball=|
000000b0  33 37 3a 79 62 61 6c 6c  3d 31 30 30 3a 75 70 3d  |37:yball=100:up=|
000000c0  a3 3a 6c 65 66 74 3d a3  0d 00 46 0b 20 78 62 61  |.:left=...F. xba|
000000d0  74 3d 39 0d 00 50 4a 20  3f 63 68 61 72 3d 34 3a  |t=9..PJ ?char=4:|
000000e0  3f 78 63 3d 39 3a 3f 79  63 3d 33 30 3a 3f 78 6f  |?xc=9:?yc=30:?xo|
000000f0  66 66 3d 30 3a 3f 79 6f  66 66 3d 30 3a d6 64 69  |ff=0:?yoff=0:.di|
00000100  73 70 6c 61 79 3a 3f 78  63 3d 31 30 3a 3f 63 68  |splay:?xc=10:?ch|
00000110  61 72 3d 35 3a d6 64 69  73 70 6c 61 79 0d 00 5a  |ar=5:.display..Z|
00000120  4d 20 3f 63 68 61 72 3d  30 3a 3f 78 63 3d 78 62  |M ?char=0:?xc=xb|
00000130  61 6c 6c 20 81 34 3a 3f  79 63 3d 79 62 61 6c 6c  |all .4:?yc=yball|
00000140  20 81 38 3a 3f 78 6f 66  66 3d 78 62 61 6c 6c 20  | .8:?xoff=xball |
00000150  80 33 3a 3f 79 6f 66 66  3d 79 62 61 6c 6c 20 80  |.3:?yoff=yball .|
00000160  37 3a d6 64 69 73 70 6c  61 79 0d 00 64 06 20 f5  |7:.display..d. .|
00000170  0d 00 6e 29 20 e7 20 6c  65 66 74 20 8c 20 78 6e  |..n) . left . xn|
00000180  65 77 3d 78 62 61 6c 6c  2d 32 20 8b 20 78 6e 65  |ew=xball-2 . xne|
00000190  77 3d 78 62 61 6c 6c 2b  32 0d 00 78 27 20 e7 20  |w=xball+2..x' . |
000001a0  75 70 20 8c 20 79 6e 65  77 3d 79 62 61 6c 6c 2d  |up . ynew=yball-|
000001b0  34 20 8b 20 79 6e 65 77  3d 79 62 61 6c 6c 2b 34  |4 . ynew=yball+4|
000001c0  0d 00 82 14 20 e7 20 79  6e 65 77 3c 34 20 8c 20  |.... . ynew<4 . |
000001d0  75 70 3d a3 0d 00 8c 30  20 e7 20 79 6e 65 77 3d  |up=....0 . ynew=|
000001e0  32 34 38 20 8c 20 ef 37  3a f5 20 fd 20 a6 28 2d  |248 . .7:. . .(-|
000001f0  39 39 29 3a 78 6e 65 77  3d 33 37 3a 79 6e 65 77  |99):xnew=37:ynew|
00000200  3d 31 30 30 0d 00 96 16  20 e7 20 78 6e 65 77 3d  |=100.... . xnew=|
00000210  31 20 8c 20 6c 65 66 74  3d a3 0d 00 a0 17 20 e7  |1 . left=..... .|
00000220  20 78 6e 65 77 3d 37 35  20 8c 20 6c 65 66 74 3d  | xnew=75 . left=|
00000230  b9 0d 00 aa 4d 20 3f 63  68 61 72 3d 30 3a 3f 78  |....M ?char=0:?x|
00000240  63 3d 78 62 61 6c 6c 20  81 34 3a 3f 79 63 3d 79  |c=xball .4:?yc=y|
00000250  62 61 6c 6c 20 81 38 3a  3f 78 6f 66 66 3d 78 62  |ball .8:?xoff=xb|
00000260  61 6c 6c 20 80 33 3a 3f  79 6f 66 66 3d 79 62 61  |all .3:?yoff=yba|
00000270  6c 6c 20 80 37 3a d6 64  69 73 70 6c 61 79 0d 00  |ll .7:.display..|
00000280  b4 1a 20 78 62 61 6c 6c  3d 78 6e 65 77 3a 79 62  |.. xball=xnew:yb|
00000290  61 6c 6c 3d 79 6e 65 77  0d 00 be 4d 20 3f 63 68  |all=ynew...M ?ch|
000002a0  61 72 3d 30 3a 3f 78 63  3d 78 62 61 6c 6c 20 81  |ar=0:?xc=xball .|
000002b0  34 3a 3f 79 63 3d 79 62  61 6c 6c 20 81 38 3a 3f  |4:?yc=yball .8:?|
000002c0  78 6f 66 66 3d 78 62 61  6c 6c 20 80 33 3a 3f 79  |xoff=xball .3:?y|
000002d0  6f 66 66 3d 79 62 61 6c  6c 20 80 37 3a d6 64 69  |off=yball .7:.di|
000002e0  73 70 6c 61 79 0d 00 c8  41 20 e7 20 79 62 61 6c  |splay...A . ybal|
000002f0  6c 3d 32 33 32 20 80 20  28 78 62 61 6c 6c 3e 28  |l=232 . (xball>(|
00000300  78 62 61 74 2d 32 29 2a  34 29 20 80 20 28 78 62  |xbat-2)*4) . (xb|
00000310  61 6c 6c 3c 28 78 62 61  74 2b 32 29 2a 34 29 20  |all<(xbat+2)*4) |
00000320  8c 20 75 70 3d b9 0d 00  d2 18 20 e7 20 79 62 61  |. up=..... . yba|
00000330  6c 6c 3e 38 30 20 8c 20  e5 20 8d 44 4a 41 0d 00  |ll>80 . . .DJA..|
00000340  dc 2b 20 78 62 25 3d 78  62 61 6c 6c 20 81 34 3a  |.+ xb%=xball .4:|
00000350  79 62 25 3d 79 62 61 6c  6c 20 81 38 3a f2 73 65  |yb%=yball .8:.se|
00000360  74 70 61 69 6e 74 28 30  29 0d 00 e6 74 20 e7 20  |tpaint(0)...t . |
00000370  75 70 20 80 20 79 62 25  3c 3e 30 20 8c 20 e7 20  |up . yb%<>0 . . |
00000380  62 6c 6f 6b 25 28 78 62  25 2c 79 62 25 2d 31 29  |blok%(xb%,yb%-1)|
00000390  3d 30 8c 75 70 3d a3 3a  62 6c 6f 6b 25 28 78 62  |=0.up=.:blok%(xb|
000003a0  25 2c 79 62 25 2d 31 29  3d 31 3a 3f 63 68 61 72  |%,yb%-1)=1:?char|
000003b0  3d 36 3a 3f 78 63 3d 78  62 25 3a 3f 79 63 3d 79  |=6:?xc=xb%:?yc=y|
000003c0  62 25 2d 31 3a 3f 78 6f  66 66 3d 30 3a 3f 79 6f  |b%-1:?xoff=0:?yo|
000003d0  66 66 3d 30 3a d6 64 69  73 70 6c 61 79 0d 00 f0  |ff=0:.display...|
000003e0  91 20 e7 20 75 70 20 80  20 6c 65 66 74 20 80 20  |. . up . left . |
000003f0  79 62 25 3c 3e 30 20 80  20 78 62 25 3c 3e 30 20  |yb%<>0 . xb%<>0 |
00000400  8c 20 e7 20 62 6c 6f 6b  25 28 78 62 25 2d 31 2c  |. . blok%(xb%-1,|
00000410  79 62 25 2d 31 29 3d 30  8c 75 70 3d a3 3a 6c 65  |yb%-1)=0.up=.:le|
00000420  66 74 3d a3 3a 62 6c 6f  6b 25 28 78 62 25 2d 31  |ft=.:blok%(xb%-1|
00000430  2c 79 62 25 2d 31 29 3d  31 3a 3f 63 68 61 72 3d  |,yb%-1)=1:?char=|
00000440  36 3a 3f 78 63 3d 78 62  25 2d 31 3a 3f 79 63 3d  |6:?xc=xb%-1:?yc=|
00000450  79 62 25 2d 31 3a 3f 78  6f 66 66 3d 30 3a 3f 79  |yb%-1:?xoff=0:?y|
00000460  6f 66 66 3d 30 3a d6 64  69 73 70 6c 61 79 0d 00  |off=0:.display..|
00000470  fa 95 20 e7 20 75 70 20  80 20 28 ac 20 6c 65 66  |.. . up . (. lef|
00000480  74 29 20 80 20 79 62 25  3c 3e 30 20 80 20 78 62  |t) . yb%<>0 . xb|
00000490  25 3c 31 39 20 8c 20 e7  20 62 6c 6f 6b 25 28 78  |%<19 . . blok%(x|
000004a0  62 25 2b 31 2c 79 62 25  2d 31 29 3d 30 8c 75 70  |b%+1,yb%-1)=0.up|
000004b0  3d a3 3a 6c 65 66 74 3d  b9 3a 62 6c 6f 6b 25 28  |=.:left=.:blok%(|
000004c0  78 62 25 2b 31 2c 79 62  25 2d 31 29 3d 31 3a 3f  |xb%+1,yb%-1)=1:?|
000004d0  63 68 61 72 3d 36 3a 3f  78 63 3d 78 62 25 2b 31  |char=6:?xc=xb%+1|
000004e0  3a 3f 79 63 3d 79 62 25  2d 31 3a 3f 78 6f 66 66  |:?yc=yb%-1:?xoff|
000004f0  3d 30 3a 3f 79 6f 66 66  3d 30 3a d6 64 69 73 70  |=0:?yoff=0:.disp|
00000500  6c 61 79 0d 01 04 75 20  e7 20 ac 20 75 70 20 80  |lay...u . . up .|
00000510  20 79 62 25 3c 39 20 8c  20 e7 20 62 6c 6f 6b 25  | yb%<9 . . blok%|
00000520  28 78 62 25 2c 79 62 25  2b 31 29 3d 30 8c 75 70  |(xb%,yb%+1)=0.up|
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00000d6d

P/BatBall.m0

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