I recently bought a ZX81 from a popular auction site and it turned out to be an issue one with the very early bugged ROM. Photos on here of the PCB along with the result of PRINT SQR 0.25. viewtopic.php?f=7&t=2153&start=190#p34185
I don’t like to refurb these early ones before offering them up on here in case anyone is looking for one.
It has an early ULA - 8112.
It has what looks like an early PSU.
It has the early cassette cables and RF lead for the TV.
The keyboard membrane has had it and definitely needs replacing.
The case is in fair condition but is missing a screw and has no feet. I will put in a set of softer sponge feet - this is the sort that most likely would have been fitted.
I have tested it with a 16K RAM pack plugged in and loaded The Gauntlet. I did the same with a ZXpand.
I was using a ChromaSCART and my Memotech keyboard for testing with.
Included in the sale:-
ZX81 with bugged ROM
PSU and cables.
Set of soft foam feet.
If anyone is interested or wants more details please message me. It will be £25 plus p&p from the UK. I’m happy to post abroad but it can get expensive. Buyer to pay import taxes etc. Sorry, went into eBay mode there!
Some photos
Bugged ROM issue one ZX81 up for sale
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- Posts: 2183
- Joined: Sat Nov 26, 2016 2:42 am
Bugged ROM issue one ZX81 up for sale
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
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
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- Posts: 2183
- Joined: Sat Nov 26, 2016 2:42 am
Re: Bugged ROM issue one ZX81 up for sale
Some more photos.
Running a zxpand:-
Loading The Gauntlet from tape:-
Running a zxpand:-
Loading The Gauntlet from tape:-
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
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
-
- Posts: 2183
- Joined: Sat Nov 26, 2016 2:42 am
Re: Bugged ROM issue one ZX81 up for sale
Taken.
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
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