Sinclair ZX80 / ZX81 Forums

I think the problem is you are poking the DFILE system variable (16396 and 16397) to change the location of the display file such that it points to each of the 10 different screens in turn, but crucially the two bytes are not changed at the same time. This means that after location 16397 has been wr...

I've fixed this bug and released v1.16. See here for download link.

EightyOne v1.16 is now available from SourceForge.

This version fixes the loading from zip files issue reported here.

Nice! I've added a link to the program from my website.

One issue that caught me out for a while is that the program only runs when using the edition 2 ZX81 ROM. With an edition 1 ROM the program crashes with error code C/9510.

mrtinb wrote: ↑

Sun Jul 07, 2019 10:46 pm

If you have real hardware with tape loading, I’ve read you can load with RAND USR 836 to stop auto-run. (This I’ve never tried myself.)

This works but must be run in FAST mode.

bodz wrote: ↑

Fri Jun 14, 2019 9:56 am

I have a copy of the second edition of this book, if that is of any use?

That would be great, thanks.

Thanks for reporting the bug. I've forwarded details on to you about how to submit fixes.

Does anyone have a scan (or photos of each page) of the book "50 Rip-Roaring games for the ZX80 and ZX81"?

Volume 1 only consists of 2 issues - November 1980 (number 1) and December 1980 (number 2). January 1981 is volume 2 number 1. So the archive isn't quite so bad as you think.

It looks great!! You've done a really nice job with the graphics, working skilfully around the limitations of pseudo hi-res. :) Horizontal movement will be challenging unless you opt for moving the sprites one character cell at a time. But I think that would work fine and would still look good. It w...