8K Memory PEEK

This slow but simple program peeks memory 100 bytes at a time. It displays consecutive bytes in 5 columns by 20 rows. Designed for the ZX81, it works with 16K RAM.

To use, enter the program, then RUN. Type any address starting with an even hundred, then ENTER (use 0 to see the first 100 bytes in ROM). After 15 seconds the screen displays 100 bytes starting at the address you entered. Type CONT ENTER and the next screen listing continues at the next address. The program runs faster in the FAST mode on a ZX81.

We can provide this program on cassette for $7.31 if you want a working copy. We cannot troubleshoot your typed program.

Joseph L. Hartmann Jr., 101 Tonnele Ave, Jersey City, NJ 07306

  10 PRINT "ADDRESS IS =",
  20 INPUT A
  30 CLS
  35 PRINT AT 0,6;"WAIT 15 SECONDS"
  37 PAUSE 80
  38 POKE 16437,255
  40 PRINT AT 0,6;"+00 +20 +40 +60 +80"
  50 FOR I=1 TO 20
  60 PRINT AT I+1,0;A-1+I
  70 NEXT I
  90 FOR J=1 TO 5
  95 FOR I=1 TO 20
 100 PRINT AT I+1,6+4*(J-1);PEEK (A-1+I)
 110 NEXT I
 120 LET A=A+20
 130 NEXT J
 140 STOP
 150 GOTO 40
Syntactic Sum: 19776, 8K