Lardo buys another zeddy

ZX80 / ZX81 hardware and software offered for sale or swapping
Lardo Boffin
Posts: 1746
Joined: Sat Nov 26, 2016 2:42 am

Re: Lardo buys another zeddy

Post by Lardo Boffin »

A fairly early working issue one but no outer box sadly.

D5A7D374-25A3-45F4-80CD-59DABDB195C4.jpeg

Bugged ROM so I will need to swap that out if I want to fit a Wespi to this.
BB1F643F-AE29-4041-8691-16B61DD815CE.jpeg
ZX80
ZX81 iss 1 (bugged ROM, kludge fix, normal, rebuilt)
Iss 3 ZXVid
TS 1000 iss 3, ZXPand AY and +, ZX8-CCB, ZX-KDLX & ChromaSCART
TS 1500 & 2000
Spectrum 16k (iss 1 s/n 862)
Spectrum 48ks plus a DIVMMC future and SPECTRA
Lardo Boffin
Posts: 1746
Joined: Sat Nov 26, 2016 2:42 am

Re: Lardo buys another zeddy

Post by Lardo Boffin »

A very nice boxed (kind of) issue one zeddy. A pretty good picture using RF as well!
E68172C1-0F9B-4A00-AA0E-FCBD7B3AD432.jpeg

With a cool yellow PCB with a 622 ROM and (now) 16K of RAM.

DF6DE57F-6B4C-4F0F-907A-672D1AF33CEF.jpeg
ZX80
ZX81 iss 1 (bugged ROM, kludge fix, normal, rebuilt)
Iss 3 ZXVid
TS 1000 iss 3, ZXPand AY and +, ZX8-CCB, ZX-KDLX & ChromaSCART
TS 1500 & 2000
Spectrum 16k (iss 1 s/n 862)
Spectrum 48ks plus a DIVMMC future and SPECTRA
Lardo Boffin
Posts: 1746
Joined: Sat Nov 26, 2016 2:42 am

Re: Lardo buys another zeddy

Post by Lardo Boffin »

A poorly issue one. At least all the important chips are socketed!

54FD901B-D884-4CB2-AFC8-0E701A3AC306.jpeg
ZX80
ZX81 iss 1 (bugged ROM, kludge fix, normal, rebuilt)
Iss 3 ZXVid
TS 1000 iss 3, ZXPand AY and +, ZX8-CCB, ZX-KDLX & ChromaSCART
TS 1500 & 2000
Spectrum 16k (iss 1 s/n 862)
Spectrum 48ks plus a DIVMMC future and SPECTRA
Lardo Boffin
Posts: 1746
Joined: Sat Nov 26, 2016 2:42 am

Re: Lardo buys another zeddy

Post by Lardo Boffin »

A quick chip swap and now it boots nicely to the K prompt.

The Z80. I’m pretty sure now that I have had way more failed Z80s than ULAs. Which is certainly the better option of the two!
ZX80
ZX81 iss 1 (bugged ROM, kludge fix, normal, rebuilt)
Iss 3 ZXVid
TS 1000 iss 3, ZXPand AY and +, ZX8-CCB, ZX-KDLX & ChromaSCART
TS 1500 & 2000
Spectrum 16k (iss 1 s/n 862)
Spectrum 48ks plus a DIVMMC future and SPECTRA
Lardo Boffin
Posts: 1746
Joined: Sat Nov 26, 2016 2:42 am

Re: Lardo buys another zeddy

Post by Lardo Boffin »

Another working yellow issue one with a 622 ROM:

6C86A338-76C5-42B3-B146-2CF1823183E0.jpeg
0B5D9C48-9869-4F9F-878F-A3B824850323.jpeg

Both this and the one further up have 8142 dated RF modulators, yellow boards and the same intermediate 622 ROM. Wonder if they were part of the same production run?
ZX80
ZX81 iss 1 (bugged ROM, kludge fix, normal, rebuilt)
Iss 3 ZXVid
TS 1000 iss 3, ZXPand AY and +, ZX8-CCB, ZX-KDLX & ChromaSCART
TS 1500 & 2000
Spectrum 16k (iss 1 s/n 862)
Spectrum 48ks plus a DIVMMC future and SPECTRA
Lardo Boffin
Posts: 1746
Joined: Sat Nov 26, 2016 2:42 am

Re: Lardo buys another zeddy

Post by Lardo Boffin »

A nice brown postal boxed issue one with cool keyboard that seems fine:

75C7313B-E584-4964-97FF-025F2EA0AD43.jpeg

It came with a Special RAMPack from Audio Computers which boots up and survives the DIM A(3000) test so is probably Ok. If I can open it without damage I will post photos of the insides.
ZX80
ZX81 iss 1 (bugged ROM, kludge fix, normal, rebuilt)
Iss 3 ZXVid
TS 1000 iss 3, ZXPand AY and +, ZX8-CCB, ZX-KDLX & ChromaSCART
TS 1500 & 2000
Spectrum 16k (iss 1 s/n 862)
Spectrum 48ks plus a DIVMMC future and SPECTRA
Moggy
Posts: 2686
Joined: Wed Jun 18, 2008 2:00 pm

Re: Lardo buys another zeddy

Post by Moggy »

I have been corresponding with another forum member re that particular rampack which it seems had an EPROM board add on for it, more info here...

https://k1.spdns.de/Vintage/Sinclair/80 ... 20Rampack/
Lardo Boffin
Posts: 1746
Joined: Sat Nov 26, 2016 2:42 am

Re: Lardo buys another zeddy

Post by Lardo Boffin »

Moggy wrote: Fri Jun 24, 2022 2:55 pm I have been corresponding with another forum member re that particular rampack which it seems had an EPROM board add on for it, more info here...

https://k1.spdns.de/Vintage/Sinclair/80 ... 20Rampack/
Thanks! I was wondering about the empty socket.

https://sinclairzxworld.com/viewtopic.p ... 228#p47228


Mine does appear to be a slightly different version - still has a socket but no beeper connector etc.

Obviously mine is the ‘NOT QUITE SO’ SPECIAL RAMPACK.
ZX80
ZX81 iss 1 (bugged ROM, kludge fix, normal, rebuilt)
Iss 3 ZXVid
TS 1000 iss 3, ZXPand AY and +, ZX8-CCB, ZX-KDLX & ChromaSCART
TS 1500 & 2000
Spectrum 16k (iss 1 s/n 862)
Spectrum 48ks plus a DIVMMC future and SPECTRA
Lardo Boffin
Posts: 1746
Joined: Sat Nov 26, 2016 2:42 am

Re: Lardo buys another zeddy

Post by Lardo Boffin »

Picture of the insides:

C737D12D-86D9-490A-BDD4-FFF25D1DA189.jpeg

Nice RAM chip! 8-)
ZX80
ZX81 iss 1 (bugged ROM, kludge fix, normal, rebuilt)
Iss 3 ZXVid
TS 1000 iss 3, ZXPand AY and +, ZX8-CCB, ZX-KDLX & ChromaSCART
TS 1500 & 2000
Spectrum 16k (iss 1 s/n 862)
Spectrum 48ks plus a DIVMMC future and SPECTRA
User avatar
1024MAK
Posts: 4096
Joined: Mon Sep 26, 2011 10:56 am
Location: Looking forward to summer in Somerset, UK...

Re: Lardo buys another zeddy

Post by 1024MAK »

Someone must have found a spare box of them SRAM chips in a warehouse, as that’s significantly older than the rest of the chips :lol:

Mark
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