Lardo buys another zeddy
-
- Posts: 2256
- Joined: Sat Nov 26, 2016 2:42 am
Re: Lardo buys another zeddy
A nice, working (switches on and can type a small program) kludge fix zeddy:
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: 2256
- Joined: Sat Nov 26, 2016 2:42 am
Re: Lardo buys another zeddy
Check out all these type ins!
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
- 1024MAK
- Posts: 5527
- Joined: Mon Sep 26, 2011 10:56 am
- Location: Looking forward to summer in Somerset, UK...
- Contact:
Re: Lardo buys another zeddy
Well, get typing...
Mark

Mark
ZX81 Variations
ZX81 Chip Pin-outs
ZX81 Video Transistor Amp
Standby alert 
There are four lights!
Step up to red alert. Sir, are you absolutely sure? It does mean changing the bulb
Spring approaching...
ZX81 Chip Pin-outs
ZX81 Video Transistor Amp


There are four lights!
Step up to red alert. Sir, are you absolutely sure? It does mean changing the bulb

Spring approaching...
-
- Posts: 2256
- Joined: Sat Nov 26, 2016 2:42 am
Re: Lardo buys another zeddy

See? Told you I could stop.

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.
Aside from a few dodgy segments, a very unforgiving battery compartment and some reluctant keys the calculator works!
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
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
Re: Lardo buys another zeddy
Hmmm, wonder if that 32K Memopak is an MT05 PCB !(?)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.
-
- Posts: 2256
- Joined: Sat Nov 26, 2016 2:42 am
Re: Lardo buys another zeddy
I will have a look.sP1d3r wrote: ↑Sun Oct 20, 2024 11:26 amHmmm, wonder if that 32K Memopak is an MT05 PCB !(?)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.
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: 2256
- Joined: Sat Nov 26, 2016 2:42 am
Re: Lardo buys another zeddy
It is an MT05-01 PCB.
When I have a few spare minutes I will open it up and take some photos.
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
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
Re: Lardo buys another zeddy
Thanks for checking, Lardo.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.
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.
-
- Posts: 2256
- Joined: Sat Nov 26, 2016 2:42 am
Re: Lardo buys another zeddy
Sorry, I don’t have the resources to dump the PROM.sP1d3r wrote: ↑Mon Oct 21, 2024 11:05 amThanks for checking, Lardo.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.
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.
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
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
Re: Lardo buys another zeddy
Cool, that's doable, I'll PM you.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.