10 DIM CB(3),CM(3),MV$(6)
20 GOSUB 400:GOSUB 300
107 REM
108 REM MAIN LOOP
109 REM
110 AM=AM+1:IF AM>3 THEN AM=0
117 REM
118 REM SWITCH CHARACTER SETS
119 REM
120 POKE 53272,CM(AM):FOR K=0 TO 59:NEXT
127 REM
128 REM IS SHIFT, COMMODORE, OR CTRL PRESSED?
129 REM
130 IF PEEK(653)>0 THEN 200
190 GOTO 110
197 REM
198 REM ENDING ROUTINE
199 REM
200 POKE 808,237:POKE 648,4:POKE 53272,XX:POKE 56578,PEEK(56578)OR 3
210 POKE 56576,(PEEK(56576)AND 252)OR 3:PRINT "[154]":END
297 REM
298 REM SET UP SCREEN RANDOMLY
299 REM
300 MV$(0)="[156]A":MV$(1)="B":MV$(2)="C":MV$(3)="[144]D":MV$(4)="[129]E":MV$(5)="[149]F"
310 MV$(6)="[144]GH"
340 FOR I=0 TO 35:D=INT(RND(9)*24):R=2*INT(RND(9)*19):CC=INT(RND(9)*7)
350 PRINT "";:FOR J=0 TO D:PRINT "";:NEXT:PRINT TAB(R)MV$(CC)" ";:NEXT:RETURN
395 REM
396 REM VIDEO SET-UP ROUTINES
397 REM
398 REM SET VIDEO POINTERS
399 REM
400 VM=1:SM=6:FOR I=0 TO 3:CM(I)=I*2+8:NEXT:XX=PEEK(53272)
407 REM
408 REM SET STARTING ADDRESSES
409 REM
410 VB=16*1024*VM:SB=VB+1024*SM:FOR I=0 TO 3:CB(I)=CM(I)*1024+VB:NEXT
417 REM
418 REM POKE CHARACTER DATA INTO PLACE
419 REM
420 FOR I=0 TO 3:FOR J=CB(I)+8 TO CB(I)+71:READ A:POKE J,A:NEXT:NEXT
427 REM
428 REM SET UP BLANK CHARACTER
429 REM
430 FOR I=0 TO 3:FOR J=CB(I)+32*8 TO CB(I)+32*8+7:POKE J,0:NEXT:NEXT
437 REM
438 REM POKE NEW CHARACTER SET AND SCREEN MEMORY LOCATIONS
439 REM
440 SK=SM*16:POKE 648,SB/256
445 FOR I=0 TO 3:CM(I)=CM(I)+SK:NEXT:POKE 53272,CM(0)
447 REM
448 REM POKE NEW VIDEO BLOCK LOCATION
449 REM
450 POKE 56578,PEEK(56578)OR 3:POKE 56576,(PEEK(56576)AND 252)OR (3-VM)
457 REM
458 REM DISABLE SHIFT-COMMODORE AND RUN/STOP-RESTORE
459 REM
460 PRINT CHR$(8):POKE 808,234
490 PRINT "[147]":RETURN
997 REM
998 REM CHARACTER DATA
999 REM
1000 DATA 0,0,0,24,24,0,0,0
1010 DATA 124,254,146,238,254,124,0,0
1020 DATA 28,62,62,28,0,0,0,0
1030 DATA 56,64,128,128,128,128,192,192
1040 DATA 0,0,0,0,0,0,16,254
1050 DATA 0,64,64,255,255,2,2,0
1060 DATA 0,10,10,10,22,45,83,145
1070 DATA 0,80,80,80,104,172,202,137
1080 DATA 0,0,24,44,52,24,0,0
1090 DATA 124,254,146,238,254,84,124,0
1100 DATA 0,0,0,28,62,62,28,0
1110 DATA 0,0,0,128,128,128,67,63
1120 DATA 0,0,0,0,16,56,124,254
1130 DATA 2,7,14,158,121,112,224,64
1140 DATA 0,20,20,42,45,75,81,144
1150 DATA 0,40,40,84,180,210,138,9
1160 DATA 0,60,122,102,102,94,60,0
1170 DATA 124,254,146,238,254,84,40,124
1180 DATA 0,0,0,0,0,28,62,127
1190 DATA 3,3,1,1,1,1,2,28
1200 DATA 0,0,16,16,56,56,124,254
1210 DATA 24,30,24,24,24,24,120,24
1220 DATA 20,42,45,43,81,80,80,144
1230 DATA 40,84,180,212,138,10,10,9
1240 DATA 126,191,195,203,211,195,253,126
1250 DATA 124,254,146,238,254,84,124,0
1260 DATA 0,0,0,28,62,62,28,0
1270 DATA 252,194,1,01,1,0,0,0
1280 DATA 16,16,56,56,124,124,254,254
1290 DATA 72,240,112,56,28,14,15,18
1300 DATA 0,20,20,42,45,75,81,144
1310 DATA 0,40,40,84,180,210,138,9