Sinclair ZX80 / ZX81 / Z88 Forums

Thank you Johan, as usual GREAT content!! I've still to apply it, but I see possibility for few more bytes shaved from the 1K real chess :) I hope that with this jumpstart introduction more people will start developing on the beautiful and challenging bare 1K ZX81 hardware to exploit it to its fulle...

On one of my systems I updated Ubuntu Linux and I think this caused error "zesarux: error while loading shared libraries: libssl.so.1.1: cannot open shared object file: No such file or directory". From what I read on the openssl website (https://www.openssl.org/source/) seems that the 1.1 library is...

Those pages are from 49 Explosive Games for the ZX81 , which also features 28 programs for the 4K ROM ZX80 at the end of the book. Those ZX80 games were originally published in 50 Rip-Roaring Games for the ZX80 and ZX81 . The programs from the book can be found here: 50 Rip-Roaring Games for the ZX...

With 30 minutes and some keypress logic mangement is possible to reproduce Dragon's Lair

Having a look on a book of which I vaguely remember the title as N wonderful programs for the ZX80 and ZX81, time go I saved 2 pages that were listing the program to play draughts in 1k in basic on the zx80. Attached the pages. Question is: did someone ever played with it? Seems a nice program but I...

Beautiful!!
I like the transparent keycaps with the black labels on it. How did you print and attached them?

WOW!!!
This is really Z80 porn!!...
LOL

Always amazed about the amount of features and fixes you're able to deliver each single release!
Thank you again for your work!!

Pity he does not feel our nostalgia and excitement to keep these beautiful machine running, and surely he missed some details (eg no microdrive for spectrum), but anyway here https://floppydays.libsyn.com/floppy-days-85-interview-with-john-grant-developer-of-zx80-os-basic you can find an interesting...

Just willing to add that the algorithm is extremely important in the conversion, and depending on the source image various one can be better than others...