Sinclair ZX80 / ZX81 / Z88 Forums

It also seems to me that large chunks of the Virus engine could be used in something like a Paradroid clone

Just a suggestion.

Regards,

Shaun.

So what's next? Blimey! No rest for the wicked eh? :lol: To be honest I'm not sure. I like the idea of trying to do something in 3D, either maze based like 3D Monster Maze, or a racing game like OutRun, or maybe a scrolling Shoot 'em-up such as R-Type. What would you all like to see next? Out of th...

I've tested the game on a couple of real ZX81s and an old black-and-white, one with a Memopak 16K expansion, and the other with a real Sinclair RAM-Pack and a video inverter. I've not had any problems with it, and it looks quick cool with white on black rather than the standard black on white. Playi...

Actually, I've been looking at the ZX81's memory map, and it appears that your programme example (for how many free bytes) is incorrect, as follows: 9999 PRINT PEEK 16388+256*PEEK 16389-PEEK 16412-256*PEEK 16413;" BYTES FREE" I actually have a 32K RAM PACK, but in order to access anything above the ...

I think the answer can be found on the Memotech documentation found at www.zx81.de for using 64K and 32K on your system.

Regards,

Shaun.

I'll have to load it later, especially as I can use my Laptop as a ZX81 tape player - probably the most useful thing I've done with it

Regards,

Shaun.

Hi,

Thanks for the tip. For some reason, it's telling me that I have around 32,000 bytes free? I have a Memotech 16K RAM Pack which is second hand, and it's not a unit I've owned from new... therefore does this mean that it's been internally modified to boost the RAM?

Regards,

Shaun.

Hi,

How do I find out how many free bytes are left on my ZX81? I know there was a way to PEEK at two memory locations, but I can't remember which one.

Regards,

Shaun.

You say that you've got all 8 levels in...? When is the new build going to be uploaded?

Regards,

Shaun.

Hi, I'd be interested in a board. Regarding the (C), well if it's an exact ZX80 clone then there's a problem. I think Amstrad (who own Sinclair's IPs) said that ZX Spectrum clones could be legal as long as the ROM/OS was stored 'softly', ie, on disk or removable media, rather than being in a ROM. Re...