Sinclair ZX80 / ZX81 / Z88 Forums

I hope you use all of them from time to time. Obviously I don't use all of them, except when someone has a question about a certain model and I turn it on to verify. Or something like that. But as you can see in all the photos, they all do work! And I do replace the keyboard membranes even knowing ...

Old Zeeland, not New Zealand.

Hello, I have waaaaay too many computers ― more than is healthy for a normal person.

www.sinclaircollection.site

(Oh, I thought this was like an AA meeting, to discus your 'problem' )

1024MAK wrote: ↑Thu Aug 04, 2022 12:52 pm Does anyone here even have one?

Mark

I do.

https://www.sinclaircollection.site/?page_id=305 for high-res pics.

In SuperMath, press STOP (Function + A) and it will kick you into Basic!

(at least on a real cartridge)

If only the order of bytes for the pause command are swapped, then this (simple) checksum would be the same.

Paul wrote: ↑Sun Feb 14, 2021 3:52 pm The TS1500 ROM is identical to ZX81 Version.

The checksum of both my 1500's differ from this list:
854885 = 550
855106 = 622
878117 = 649
as they report it as being 854417!

They do have Timex roms, not Sinclair.

I came across that Ebay listing that triggered this thread ... and I checked the pictures of my Zeddies. Only the picture of my ZX81USA can be read and it's the 'L@@K R@RE' 622 ROM. Maybe only USA Zeddies had this chip? https://beta.collectorsbridge.com/collections/sinclair-computers-and-clones/arti...