ZX81 Programs


Read about, play, run, or list games, animations, and more. These are my programs from the ’80s to today.

ZX81 Program Listing

prtscrl (prtscrl.p)


SYSTEM VARIABLES

PROG  : 16509
D-FILE: 16786
VARS  : 16811
E-LINE: 16812
STKBOT: 16817
STKEND: 16817


LEGEND

9999 means line number
PRINT means treat as KEYWORD P


PROGRAM LISTING

   1 REM **PRTSCRL**SLR/2024**
   2 REM SCROLL LN EXIT ?LN
SAVE <LN DRNDINT COPY ,NOT LN P
RND<"?L4PRINT TAN STR$ VAL ñPòE£
RNDùFOR E:RNDJGOSUB DELETE ?P
ATN LN RNDAT SGN TAN RND7LOOP
DATA ñ5 ùñPòGOSUB Kñ+òE£RNDù6:
RNDTAN
  10 DIM S$(3,6)
  20 LET S$(1)="HELLO/"
  30 LET S$(2)="LATER."
  40 LET S$(3)="ALOHA*"
  50 CLS
  60 PRINT USR 16541;S$(INT (RND
*3)+1)+" "
  70 GOTO 60