Sinclair ZX80 / ZX81 / Z88 Forums

PokeMon: The bars move in a sine-pattern.

Thanks for all the positive comments, it makes my heart all warm and fuzzy! I just added the source, have a look at the original post. This version is NTSC and PAL compatible. dr beep: I really enjoyed looking at the source of your games, I hope I can inspire someone as much with my source as you've...

Thank you zx81jens, it is good to hear that all the work is appreciated.

Rishi, thanks for testing on a real zeddy, now I'll go ahead and finish the release.

It occured to me that this is a PAL-only release. On NTSC-machines the timing is too off to produce the desired effect.
An NTSC-fixed version will be released in the future.

Yes, memory-size is easy. I know that the size is OK.
The graphics capabilities of a 1k-machine are supposed to be WRX-compatible, but I have yet to test it for myself on my code. Not having an unmodified 1k-machine stopped me from being certain that it works, now I can only hope that it works.

I've been busy the last week coding an idea that I hoped would fit in an unexpanded ZX81. It should work on any unexpanded ZX81, or with memory expansion that is WRX-modified. I've tested this version to work on: - EightyOne emulator, 1k or 16k RAM, PAL or NTSC, WRX - ZX81 with internal 16k WRX RAM ...

This seems like a very nice program to try my newly built UDG!

Yes, I used to have that expansion working in one of my ZX81:s. RAMCS and ROMCS are the newly decoded signals required for the ram & rom chips, the old RAMCS and ROMCS are not used any more. I ditched this expansion and built a 16k internal RAM that does WRX, and also an 8k in the 8-16k area that ca...

And some pixels to back me up:

I got some serious error searching and soldering done this weekend, and I restored one of my broken ZX81s to full working order. Having done the repairs, I finally made an 8k UDG ram, according to the description at http://homepage.ntlworld.com/deborah.clayton1/zx81+2.html Now I can finally play aro...