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Wanted: Zilog Z80, week 17 1982

Posted: Mon May 31, 2021 4:42 pm
by Erm
For originality (in an Issue 1 Spectrum as it happens) I'm looking for a 1982 Zilog branded Z80 that is as close as possible to week 17. Perhaps someone has a socketed one of that date in a ZX81.

Happy to swap for a newer Z80 or to pay a fair price.

Re: Wanted: Zilog Z80, week 17 1982

Posted: Mon May 31, 2021 9:49 pm
by Lardo Boffin
I have an 8204. CPUs were often earlier than the ULA so if nothing better comes along it may be an option?

I have only just got it so would have to test it properly first.

A6FE19DA-4E4B-4AD6-8C02-230A714CE023.jpeg

My issue one has an 8208 Z80 and 8214 ULA.

Re: Wanted: Zilog Z80, week 17 1982

Posted: Thu Jun 03, 2021 7:17 pm
by Erm
Yes, ok, thanks.

Does it work?

Re: Wanted: Zilog Z80, week 17 1982

Posted: Thu Jun 03, 2021 9:09 pm
by Lardo Boffin
Erm wrote: Thu Jun 03, 2021 7:17 pm Yes, ok, thanks.

Does it work?
I will check it out over the weekend. It boots to the K but thats all I know so far.

Re: Wanted: Zilog Z80, week 17 1982

Posted: Thu Jun 03, 2021 9:19 pm
by BarryN
Lardo Boffin wrote: Thu Jun 03, 2021 9:09 pm
Erm wrote: Thu Jun 03, 2021 7:17 pm Yes, ok, thanks.

Does it work?
I will check it out over the weekend. It boots to the K but thats all I know so far.
Well, that's a good start.

Re: Wanted: Zilog Z80, week 17 1982

Posted: Thu Jun 03, 2021 11:41 pm
by Lardo Boffin
It has happily run The Gauntlet and Rock Crush with a Chroma81, Memotech Keyboard and ‘Spand plugged in for about 10 mins so seems fine. Happy to soak test for an hour at some point if you want?

7B549848-F744-4CA9-8524-5C87F779F91D.jpeg

Hard to believe but the screen is actually white!
687560CB-3391-4A6A-9334-339A9D46C262.jpeg

Re: Wanted: Zilog Z80, week 17 1982

Posted: Thu Jun 03, 2021 11:58 pm
by Erm
Thanks. Looks good them. Leave it on for an hour, but only if you have the time.

Re: Wanted: Zilog Z80, week 17 1982

Posted: Fri Jun 04, 2021 7:10 pm
by Lardo Boffin
Erm wrote: Thu Jun 03, 2021 11:58 pm Thanks. Looks good them. Leave it on for an hour, but only if you have the time.
It happily played The Gauntlet for best part of two hours. :D