Lardo buys another zeddy
Re: Lardo buys another zeddy
Looks very nice.
I'm guessing issue three, NEC ROM and CPU and back porch ULA. (That's if you open it up )
I'm guessing issue three, NEC ROM and CPU and back porch ULA. (That's if you open it up )
-
- Posts: 2173
- Joined: Sat Nov 26, 2016 2:42 am
Re: Lardo buys another zeddy
I think I may just sell this one on untouched. Far too nice!
Looking inside via the edge connector it is an issue one with the cream PCB on top, green below and everything is socketed. It doesn’t have a bugged ROM. For a change!
The output is dark but not ridiculously so.
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: 2173
- Joined: Sat Nov 26, 2016 2:42 am
Re: Lardo buys another zeddy
After a brief diversion buying a +3 with a soggy membrane back to form!
A working and would be immaculate zeddy (if it had been packed properly):
The RAM pack does not work sadly.
Not sure what this interface is?
See the pins sticking out above the edge connector on the shot above? They were face down on the zeddy keyboard with nothing separating them. Argh!!!!
A working and would be immaculate zeddy (if it had been packed properly):
The RAM pack does not work sadly.
Not sure what this interface is?
See the pins sticking out above the edge connector on the shot above? They were face down on the zeddy keyboard with nothing separating them. Argh!!!!
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
That interface may be a 2716 EPROM/static memory board, it looks slightly similar to the two Hunter boards that I have.
- 1024MAK
- Posts: 5118
- Joined: Mon Sep 26, 2011 10:56 am
- Location: Looking forward to summer in Somerset, UK...
Re: Lardo buys another zeddy
The empty sockets are too small for most EPROM/ROM chips. It could however be some kind of RAM card, but using small SRAMs. I base this on them all being connected to the data bus.
The 74177 chips are counters, but may be being used as latches.
In any event, this looks like it was hand soldered and could be a home made / DIY or a magazine project.
Mark
The 74177 chips are counters, but may be being used as latches.
In any event, this looks like it was hand soldered and could be a home made / DIY or a magazine project.
Mark
ZX81 Variations
ZX81 Chip Pin-outs
ZX81 Video Transistor Buffer Amp
Standby alert
There are four lights!
Step up to red alert. Sir, are you absolutely sure? It does mean changing the bulb
Looking forward to summer later in the year.
ZX81 Chip Pin-outs
ZX81 Video Transistor Buffer Amp
Standby alert
There are four lights!
Step up to red alert. Sir, are you absolutely sure? It does mean changing the bulb
Looking forward to summer later in the year.
Re: Lardo buys another zeddy
I would say that's bang on the money,Mark.
-
- Posts: 2173
- Joined: Sat Nov 26, 2016 2:42 am
Re: Lardo buys another zeddy
Not bought one for a while. Was getting the shakes!!!
A nice working zeddy (green PCB, not opened yet) and 16K RAM which also still works!
Shame the manual was beyond mouldy and ended up in the bin.
A nice working zeddy (green PCB, not opened yet) and 16K RAM which also still works!
Shame the manual was beyond mouldy and ended up in the bin.
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: 2173
- Joined: Sat Nov 26, 2016 2:42 am
Re: Lardo buys another zeddy
Its a very shiny green issue 3.
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: 5118
- Joined: Mon Sep 26, 2011 10:56 am
- Location: Looking forward to summer in Somerset, UK...
Re: Lardo buys another zeddy
ZX81 Variations
ZX81 Chip Pin-outs
ZX81 Video Transistor Buffer Amp
Standby alert
There are four lights!
Step up to red alert. Sir, are you absolutely sure? It does mean changing the bulb
Looking forward to summer later in the year.
ZX81 Chip Pin-outs
ZX81 Video Transistor Buffer Amp
Standby alert
There are four lights!
Step up to red alert. Sir, are you absolutely sure? It does mean changing the bulb
Looking forward to summer later in the year.
-
- Posts: 2173
- Joined: Sat Nov 26, 2016 2:42 am
Re: Lardo buys another zeddy
Oh yes.
Photos to follow next week of the other one I just bought a few mins ago.
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