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sh45a.d64
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listing 7
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.txt
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Wrap
Commodore BASIC
|
1995-03-30
|
493b
|
19 lines
5 BASE=2*4096:POKE 53272,PEEK(53272) OR 8 :REM BITMAP AB 8192
10 POKE 53265,PEEK(53265) OR 32:REM BITMAPMODUS EINSCHALTEN
20 FOR I=BASE TO BASE+7999:POKE I,0:NEXT:REM BITMAP LOESCHEN
30 FOR I=1024 TO 2023:POKE I,3:NEXT:REM FARBEN AUF CYAN UND SCHWARZ
50 FOR X=0 TO 160:REM FUNKTION FUELLT HALBEN BILDSCHIRM
55 Y1=100+SQR(160*X-X*X)
56 Y2=100-SQR(160*X-X*X)
60 FOR Y=Y1 TO Y2 STEP Y1-Y2
70 CH=INT(X/8)
80 RO=INT(Y/8)
85 LN=Y AND 7
90 BY=BASE+RO*320+8*CH+LN
100 BI=7-(X AND 7)
110 POKE BY,PEEK(BY) OR (2^BI)
114 NEXT Y
120 NEXT X
125 POKE 1024,16
130 GOTO 130