Search found 1487 matches

by Lardo Boffin
Thu Jun 17, 2021 8:47 am
Forum: Welcome Area
Topic: Greetings from London
Replies: 2
Views: 142

Re: Greetings from London

Welcome. Its only a small step from emulators to a room full of zeddies!
by Lardo Boffin
Fri Jun 11, 2021 5:19 pm
Forum: SALES
Topic: Sold - Issue one PCB working but with large heat sink on ULA
Replies: 6
Views: 481

Re: For sale - Issue one PCB working but with large heat sink on ULA

Moggy wrote: Fri Jun 11, 2021 5:15 pm Quote.
"The ULA has a large heat sink attached which I doubt can be removed....!


Really?
Awesome! Can I borrow it please?
by Lardo Boffin
Fri Jun 11, 2021 4:15 pm
Forum: SALES
Topic: Sold - Issue one PCB working but with large heat sink on ULA
Replies: 6
Views: 481

Sold - Issue one PCB working but with large heat sink on ULA

Hello all I have for sale a working issue one zeddy motherboard only, but the catch is that the ULA has a large heat sink attached which I doubt can be removed and won’t go in a standard case. I know some of us have zeddies in larger enclosures so it may be of use? It is working as shown - I have lo...
by Lardo Boffin
Wed Jun 09, 2021 1:02 pm
Forum: Welcome Area
Topic: Hello from the Netherlands..
Replies: 8
Views: 493

Re: Hello from the Netherlands..

redhawk668 wrote: Tue Jun 08, 2021 11:01 pm
For the ZX Spectrum 16/48K I designed an s-video board to replace the modulator, to provide dotcrawl free video output.
Welcome on board. :D

The dot crawl free board sounds interesting.
by Lardo Boffin
Sun Jun 06, 2021 12:25 am
Forum: Hardware
Topic: ‘Tatung 81’ (ZX81 in a case)
Replies: 26
Views: 1666

Re: ‘Tatung 81’ (ZX81 in a case)

Thanks Mark. I transplanted my rebuilt zeddy inside and it works a treat. :D (still need to finish the switch on the ROM) Then I decided to put my ‘Spand inside. Nope…. 2D7FF549-AB06-4F0A-AA2D-339AEC1135DE.jpeg Going to hit the PSU. OK. Put back the IO expander and then mount it on that. FBC39433-72...
by Lardo Boffin
Sat Jun 05, 2021 11:43 am
Forum: Hardware
Topic: 16K RAM Pack photos - please add yours
Replies: 15
Views: 4701

Re: JRS 16K RAM Pack

This is about the sixth design of ZX81 RAM pack that I have seen. Each one uses a different method or different variation of design for obtaining a -5V supply. Some use a transistor oscillator driving an inductor like the Sinclair 16k RAM pack. Some use a CMOS logic chip and capacitors to do it. So...
by Lardo Boffin
Fri Jun 04, 2021 7:10 pm
Forum: WANTED
Topic: Wanted: Zilog Z80, week 17 1982
Replies: 7
Views: 867

Re: Wanted: Zilog Z80, week 17 1982

Erm wrote: Thu Jun 03, 2021 11:58 pm Thanks. Looks good them. Leave it on for an hour, but only if you have the time.
It happily played The Gauntlet for best part of two hours. :D
by Lardo Boffin
Fri Jun 04, 2021 5:27 pm
Forum: SALES
Topic: Lardo buys another zeddy
Replies: 117
Views: 59659

Re: Lardo buys another zeddy

Some photos of the inside here viewtopic.php?p=43130#p43130
by Lardo Boffin
Fri Jun 04, 2021 5:27 pm
Forum: Hardware
Topic: 16K RAM Pack photos - please add yours
Replies: 15
Views: 4701

Re: 16K RAM Pack photos

And a Stonechip Panda 16K RAM pack:

499DB884-7A93-4DBE-90B2-E18A221D087E.jpeg

Close up of RAM chip:
018E6CAB-E44A-4267-8781-D4FF3C449749.jpeg