prindle@nadc.arpa (03/29/83)
Here are two not-too-useful programs which do things that Uncle Clive would rather we didn't know we could do. They do open some interesting possibilities though: Program #1: "HOW MANY COLUMNS DID YOU SAY?" (definitely not for 1K) 10 DIM A$(818) 20 FAST 25 LET A$(1)=CHR$ 118 30 FOR I=2 TO 817 40 LET A$(I)="F" 50 NEXT I 60 LET X=PEEK 16396 70 LET Y=PEEK 16397 80 POKE 16396,(PEEK 16400)+6 90 POKE 16397,PEEK 16401 100 SLOW 110 IF CODE INKEY$=0 THEN GOTO 110 115 FAST 120 POKE 16396,X 130 POKE 16397,Y 140 SLOW Program #2: "16 CHARACTER SETS?" (for 1K or 2K, use 17300 instead of 30000 etc.) 10 PRINT AT 10,10; "HERE WE GO" 20 POKE 30000,62 30 POKE 30002,237 40 POKE 30003,71 50 POKE 30004,201 60 FOR B=0 TO 30 STEP 2 70 POKE 30001,B 80 FOR I=1 TO 20 90 NEXT I 100 RAND USR 30000 110 NEXT B Now to pay: Does anyone know if it is possible to display more than 64 different characters (and their inverses) at the same time (presuming additional ROM with real characters); or, more complexly stated, does anyone know the exact mechanism by which the bytes corresponding to the character patterns are read by the custom logic chip and how these are made to correspond to the codes in the display file??? Or perhaps I should ask "is anyone Clive Sinclair?". I am not on info-micro, so please send any insights to me or info-zx. Thanks, Frank Prindle Prindle@NADC