ZX80 / ZX81 hardware and software offered for sale or swapping
1024MAK
Posts: 5104 Joined: Mon Sep 26, 2011 10:56 am
Location: Looking forward to summer in Somerset, UK...
Post
by 1024MAK » Mon Nov 29, 2021 6:21 pm
Lardo Boffin wrote: ↑ Sun Nov 28, 2021 4:35 pm
I may need to do something with the ULA socket though!
I thought that was normal for Sinclair’s quality control…
Thank yourself lucky they actually soldered all the connections
Mark
Lardo Boffin
Posts: 2161 Joined: Sat Nov 26, 2016 2:42 am
Post
by Lardo Boffin » Fri Dec 03, 2021 2:58 pm
A nice issue one, working, bugged ROM. But it doesn’t say 550 on it! Maybe a quite early ROM?
Still needs a bit of a clean.
Picture is dark but rather good!
ZX80
ZX81 iss 1 (bugged ROM, kludge fix, normal, rebuilt)
TS 1000 iss 3, ZXPand AY and +, ZX8-CCB, ZX-KDLX & ChromaSCART
Tatung 81 + Wespi
TS 1500 & 2000
Spectrum 16k (iss 1 s/n 862)
Spectrum 48ks plus a DIVMMC future and SPECTRA
Moggy
Posts: 3232 Joined: Wed Jun 18, 2008 2:00 pm
Post
by Moggy » Fri Dec 03, 2021 3:25 pm
Lardo Boffin wrote: ↑ Fri Dec 03, 2021 2:58 pm
A nice issue one, working, bugged ROM. But it doesn’t say 550 on it! Maybe a quite early ROM?
9727B3F9-D70A-4303-98CD-1A55A05F9E94.jpeg
52D834BC-5191-4C66-BE94-7724CB0046B3.jpeg
Still needs a bit of a clean.
Picture is dark but rather good!
B1FA6FE5-8AFA-4ACF-A88E-30EB173372E7.jpeg
The logo looks like it could be a Signetics manufactured chip but they usually used a solid "S" rather then the composite letter s shown here.
Moggy
Posts: 3232 Joined: Wed Jun 18, 2008 2:00 pm
Post
by Moggy » Fri Dec 03, 2021 3:38 pm
It looks like the ROM is from the other side of the pond and made by a company called Solid State Inc.
https://how-to.fandom.com/wiki/How_to_i ... _logos/P-T
Just scroll down to the "S" section to see info re the company.
Attachments
download.jpg (3.3 KiB) Viewed 2942 times
Lardo Boffin
Posts: 2161 Joined: Sat Nov 26, 2016 2:42 am
Post
by Lardo Boffin » Fri Dec 03, 2021 4:45 pm
Interesting link thanks!
ZX80
ZX81 iss 1 (bugged ROM, kludge fix, normal, rebuilt)
TS 1000 iss 3, ZXPand AY and +, ZX8-CCB, ZX-KDLX & ChromaSCART
Tatung 81 + Wespi
TS 1500 & 2000
Spectrum 16k (iss 1 s/n 862)
Spectrum 48ks plus a DIVMMC future and SPECTRA
Lardo Boffin
Posts: 2161 Joined: Sat Nov 26, 2016 2:42 am
Post
by Lardo Boffin » Fri Dec 03, 2021 4:48 pm
A ZX81 with this stuck to it is due to arrive next week (argh - another one to freeze my fingers on refurbishing in the garage…):
I assume it is a stick on keyboard for maybe a different programming language? Anyone recognise it?
ZX80
ZX81 iss 1 (bugged ROM, kludge fix, normal, rebuilt)
TS 1000 iss 3, ZXPand AY and +, ZX8-CCB, ZX-KDLX & ChromaSCART
Tatung 81 + Wespi
TS 1500 & 2000
Spectrum 16k (iss 1 s/n 862)
Spectrum 48ks plus a DIVMMC future and SPECTRA
mrtinb
Posts: 1906 Joined: Fri Nov 06, 2015 5:44 pm
Location: Denmark
Contact:
Post
by mrtinb » Fri Dec 03, 2021 5:03 pm
Looks like a stick on keyboard for some Forth, as it has the char @ ! [ ] which are used extensively in Forth.
Moggy
Posts: 3232 Joined: Wed Jun 18, 2008 2:00 pm
Post
by Moggy » Fri Dec 03, 2021 8:43 pm
It's the overlay to use with Artic's ZX Forth which is on tape software so the zeddy should have a normal ROM fitted, unless somebody has managed to burn said Forth to an EPROM. In which case get rid and fit a standard ROM because as Forths go it's pretty crap!
What did the sellers advert say Lardo about this little zeddy?
Lardo Boffin
Posts: 2161 Joined: Sat Nov 26, 2016 2:42 am
Post
by Lardo Boffin » Fri Dec 03, 2021 8:50 pm
Moggy wrote: ↑ Fri Dec 03, 2021 8:43 pm
What did the sellers advert say Lardo about this little zeddy?
Very little! Untested, no way to test, given to him so no idea what any of it does. Pretty much the usual!
ZX80
ZX81 iss 1 (bugged ROM, kludge fix, normal, rebuilt)
TS 1000 iss 3, ZXPand AY and +, ZX8-CCB, ZX-KDLX & ChromaSCART
Tatung 81 + Wespi
TS 1500 & 2000
Spectrum 16k (iss 1 s/n 862)
Spectrum 48ks plus a DIVMMC future and SPECTRA
Moggy
Posts: 3232 Joined: Wed Jun 18, 2008 2:00 pm
Post
by Moggy » Fri Dec 03, 2021 8:51 pm
Look forward to seeing its innards when it arrives.