Lardo buys another zeddy

ZX80 / ZX81 hardware and software offered for sale or swapping
Lardo Boffin
Posts: 2256
Joined: Sat Nov 26, 2016 2:42 am

Re: Lardo buys another zeddy

Post by Lardo Boffin »

A nice, working (switches on and can type a small program) kludge fix zeddy:
IMG_6696.jpeg
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: 2256
Joined: Sat Nov 26, 2016 2:42 am

Re: Lardo buys another zeddy

Post by Lardo Boffin »

Check out all these type ins!
IMG_6697.jpeg
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
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1024MAK
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Joined: Mon Sep 26, 2011 10:56 am
Location: Looking forward to summer in Somerset, UK...
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Re: Lardo buys another zeddy

Post by 1024MAK »

Well, get typing... :lol:

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Lardo Boffin
Posts: 2256
Joined: Sat Nov 26, 2016 2:42 am

Re: Lardo buys another zeddy

Post by Lardo Boffin »

:cry: Been a while! What with tax and eBay fees (and people’s ridiculous low ball offers on stuff) I have not bought any zeddies for a while as it was just not worth it.

See? Told you I could stop. 8-)

Couldn’t resist this lot though. Both zeddies allow stuff to be typed in, the RAM packs both boot up OK (yay! Didn’t have a working 32K one) and the printer feeds through ok. Need to remember how they work to test it a bit better.

IMG_8191.jpeg
Aside from a few dodgy segments, a very unforgiving battery compartment and some reluctant keys the calculator works!

IMG_8193.jpeg

It all needs a really good clean. Especially the battery connections in the calculator.
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
sP1d3r
Posts: 148
Joined: Mon May 16, 2022 9:20 am

Re: Lardo buys another zeddy

Post by sP1d3r »

Lardo Boffin wrote: Thu Oct 17, 2024 6:53 pm Both zeddies allow stuff to be typed in, the RAM packs both boot up OK (yay! Didn’t have a working 32K one) and the printer feeds through ok. Need to remember how they work to test it a bit better.
Hmmm, wonder if that 32K Memopak is an MT05 PCB !(?)
Lardo Boffin
Posts: 2256
Joined: Sat Nov 26, 2016 2:42 am

Re: Lardo buys another zeddy

Post by Lardo Boffin »

sP1d3r wrote: Sun Oct 20, 2024 11:26 am
Lardo Boffin wrote: Thu Oct 17, 2024 6:53 pm Both zeddies allow stuff to be typed in, the RAM packs both boot up OK (yay! Didn’t have a working 32K one) and the printer feeds through ok. Need to remember how they work to test it a bit better.
Hmmm, wonder if that 32K Memopak is an MT05 PCB !(?)
I will have a look.
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: 2256
Joined: Sat Nov 26, 2016 2:42 am

Re: Lardo buys another zeddy

Post by Lardo Boffin »

It is an MT05-01 PCB.

IMG_8216.jpeg

When I have a few spare minutes I will open it up and take some photos.
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
sP1d3r
Posts: 148
Joined: Mon May 16, 2022 9:20 am

Re: Lardo buys another zeddy

Post by sP1d3r »

Lardo Boffin wrote: Sun Oct 20, 2024 8:58 pm It is an MT05-01 PCB.

When I have a few spare minutes I will open it up and take some photos.
Thanks for checking, Lardo.

If you have the inclination and the resources, a dump of the prom would be appreciated or perhaps you could compare it to the dump of the 16K prom that I posted in the Memotech Memopak 16K (wiring diagram) thread.
Lardo Boffin
Posts: 2256
Joined: Sat Nov 26, 2016 2:42 am

Re: Lardo buys another zeddy

Post by Lardo Boffin »

sP1d3r wrote: Mon Oct 21, 2024 11:05 am
Lardo Boffin wrote: Sun Oct 20, 2024 8:58 pm It is an MT05-01 PCB.

When I have a few spare minutes I will open it up and take some photos.
Thanks for checking, Lardo.

If you have the inclination and the resources, a dump of the prom would be appreciated or perhaps you could compare it to the dump of the 16K prom that I posted in the Memotech Memopak 16K (wiring diagram) thread.
Sorry, I don’t have the resources to dump the PROM.

But I do have a dead MT05 motherboard I can send you. Assuming the PROM isn’t dead you may get something of use off 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
sP1d3r
Posts: 148
Joined: Mon May 16, 2022 9:20 am

Re: Lardo buys another zeddy

Post by sP1d3r »

Lardo Boffin wrote: Mon Oct 21, 2024 3:50 pm
Sorry, I don’t have the resources to dump the PROM.

But I do have a dead MT05 motherboard I can send you. Assuming the PROM isn’t dead you may get something of use off it.
Cool, that's doable, I'll PM you.
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