10 REM PLOT A RED PIXEL AT 100,100
20 REM INITIALIZE BITMAP MODE
21 POKE 53280,0:PRINT CHR$(147);"CLEARING BITMAP... PLEASE WAIT..."
22 BASE=8192:FOR I=BASE TO BASE+7999:POKE I,0:NEXT
23 PRINT CHR$(147);
24 POKE 53272,PEEK(53272) OR 8:REM SET BITMAP MEMORY AT 8192 ($2000)
25 POKE 53265,PEEK(53265) OR 32:REM ENTER BITMAP MODE
26 REM PLOT PIXEL
30 X=100:Y=100
40 MEM=BASE+INT(Y/8)*320+INT(X/8)*8+(Y AND 7)
50 PX=7-(X AND 7)
60 POKE MEM,PEEK(MEM) OR 2^PX
65 REM WAIT FOR KEYPRESS
70 GET K$:IF K$="" THEN 70
75 REM CLEAR PIXEL, RETURN TO TEXT MODE
80 POKE MEM,0:POKE 53265,PEEK(53265) AND 223:POKE 53272,PEEK(53272) AND 247
90 POKE 53280,14:POKE 53281,6:POKE 646,14:END