Sinclair ZX80 / ZX81 / Z88 Forums

Oh, and since I'm in a dev forum, I have a dev-related question about this.

Is there a good way to calculate how many bytes I have left? In other assemblers, I've been able to put an assembler directive asking it to echo the byte difference between two labels to get an idea.

I added version 2 to the first post (binary and source). This version adds:

• High score is displayed
• Speed and difficulty tweaks
• Text as "sound effects"
• Flashing when power pellet is wearing off

It would be nice if it had a hi-score. I find it more convenient to have a key for each direction, instead of a single key to change direction. but this is something personal. Thanks for the feedback! I'm planning on adding a high score feature, and a few other things as well, but I wanted to post ...

Why doesn't it fit 1K? I can help to make it fit. It really wasn't even that close to fitting into 1K, so I'm okay with it being 2K. Optimization tips would be welcome, but I will likely use them to fit as much as I can into 2K. I have experience with 6502 assembly, but this is my first time using ...

Wow ... that is definitely some witchcraft! Very impressive!

This is a 2K ZX81 version of the one-line Pac-Man style game that has been ported to a number of other platforms. The original version is a web game. There is a list of ports for other platforms in a topic for the Atari 2600 version . Anyway, this is a preliminary version, but it's fully playable. M...

Do you live in Europe? I ask because of postage. In June there will be a 32 to 56 K Ram expansion available in Europe. Of course HRG capable. Maybe also in the UK, depends on wether Lardo Boffin is willing to produce them. They are tiny but are made to fit in original Sinclair 16K housings . I live...

Thanks for all of the info! I'm not good with electronics, so I'll probably end up going with something vintage. Can I assume that all of these should also work with the Timex Sinclair 1000?

mrtinb wrote: ↑Mon Apr 29, 2024 2:29 am Know that DrBeep has just published all this knowledge in his new book. And it is very cheap indeed.

The ultimate 1K coding book: How to fully use the 1K ZX81 https://amzn.eu/d/cPnqyX1

Thanks! Ordered!

Thanks! I have seen the ZXpand mentioned before, and it looks great, although perhaps a bit more ambitious than what I'm looking for. I suppose no one has made a modern RAM Pack without all of the bells and whistles?