Sinclair ZX80 / ZX81 Forums

Hi,

Unfortunately real life has taken over so there is no progress on any actual fun projects.

If only I could earn by making real software on the ZX81 and ZX80 rather than dull old PHP.

Regards,

Shaun.

Just when I was thinking that I should make another ZX game - I'll have to check it out, thanks.

Regards,

Shaun.

Hi Moggy,

I see what you've done there. Thanks for the hints.

Shaun.

Hi all, The following BASIC program will tell you whether or not the number you have entered is in the Fibonacci number sequence, printing 1 for true and zero for false. It should allow you to work out the first 50 or so Fibanacci numbers in the sequence. Tested with normal ROM and ZX81 ROMx2 on an ...

You can save more BASIC bytes like this:

Change line 7 to:
Then add in the following line:
Now RUN the program, remove line 2 and then enter the CONT command. Hey presto, another BASIC token saved!

Regards,

Shaun.

Here's an infinitely scrolling random maze, requires 2K or more
For a 1K ZX81, change line 4 to:
Regards,

Shaun.

Here's a new game for the unexpanded ZX81 and TS1000:

https://cgc.source.run/entries.html#chase-the-ace

It's a not real entry into the CGC 2018 which has an extended deadline.

Regards,

Shaun.

Here's a 1k bouncing ball demo using some useful memory saving techniques. 2 SAVE "B" 3 CLS 4 PLOT X,Y 5 LET X=X+A 6 LET Y=Y+B 7 IF Y>=CODE "F" OR NOT Y THEN LET B=-B 8 IF X>=CODE "Z" OR NOT X THEN LET A=-A 9 GOTO PI In direct mode, enter LET X=NOT PI LET Y=X LET A=NOT X LET B=NOT Y GOTO 2 Regards, ...

Hi,

Here's a little scrolly to wish you all a Happy New Year. This version is programmed with the fantastic ZX81x2 ROM to show the improvements with the PAUSE command.

Regards,

Shaun.

1 LET R=PI/PI 5 LET L=NOT R 10 LET Q=NOT PI/PI 20 PRINT ,,("YOU ARE IN A CAVE." AND R=1);(" IN THE CAVE IS A LAMP" AND NOT L AND R=1);(" LAMP TAKEN, YOU CAN NOW SEE FURTHER." AND L=1 AND R=1);(" THE CAVE IS NOW BRIGHT AND YOU CAN SEE THE TREASURE I THE DISTANCE" AND L=1 AND R=1);("TRAP SPRUNG. YOU ...