Search found 60 matches

by msellan
Thu May 04, 2017 11:48 pm
Forum: Welcome Area
Topic: Better late than never :)
Replies: 7
Views: 3061

Re: Better late than never :)

Hi Darren,

Welcome to the forums. I'm glad you enjoyed reading about my trials and tribulations with Sinclair. How did you come to your interest in Sinclair ZX computers?

Best,

-mark
by msellan
Thu May 04, 2017 11:34 pm
Forum: Development
Topic: ULA revistited.
Replies: 168
Views: 106635

Re: ULA revistited.

I realize this thread is a bit long in the tooth but I'll ask anyway. :D Any chance that these ULA replacements are still available for purchase?

Best,

-mark
by msellan
Thu May 04, 2017 9:33 pm
Forum: Sinclair Misc
Topic: SYNTAX ZX80 and other docs
Replies: 22
Views: 9590

6 more issues loaded of SYNTAX ZX80

I'm glad folks are finding this material helpful. When I bought my ZX80 back in '81, a flyer for SYNTAX came with my computer (which I'll eventually scan too :lol: ) but I had barely scraped together enough to buy the computer so I couldn't afford the newsletter. I only saw one for the first time a ...
by msellan
Thu May 04, 2017 3:22 am
Forum: Sinclair Misc
Topic: SYNTAX ZX80 and other docs
Replies: 22
Views: 9590

Re: SYNTAX ZX80 and other docs

@1024MAK @sirmorris Thank you both for the kind words and the encouragement. I too think preserving this material is a worthwhile cause. And, I just acquired some more material on ebay tonight so I have no shortage of future projects. :D Best, -mark PS...To keep everyone in the loop, I'll just keep ...
by msellan
Wed May 03, 2017 5:39 am
Forum: Sinclair Misc
Topic: SYNTAX ZX80 and other docs
Replies: 22
Views: 9590

UPDATE Re: SYNTAX ZX80 and other docs

All, I've been busy scanning and post-processing the issues of SYNTAX I have along with getting some missing bits and rescans from the original publisher, Kirtland Olson, who has been very helpful and generous with his time. Now loaded to the Internet Archive (IA) are the two issues that comprise Vo...
by msellan
Wed May 03, 2017 1:33 am
Forum: Hardware
Topic: ZX8-CCB installation help
Replies: 22
Views: 5580

Re: ZX8-CCB installation help

Yes, I thought I'd take out the circuit board of the original modulator. I can't tell yet how that board is grounded. The modulator case is obviously grounded to the zeddy PCB with two big solder tabs but the only visible connections from the modulator board are the three connections to video and +5...
by msellan
Mon May 01, 2017 4:46 am
Forum: Hardware
Topic: ZX8-CCB installation help
Replies: 22
Views: 5580

Re: ZX8-CCB installation help

Yes, thanks Mark, the diagrams make sense. I looked at the two zeddys I'm going to install boards into (a TS1000 and a ZX81) and both match your diagram. I think I'm going to try using the UK2 pad as on mine they're both open vias without solder so adding the CCB board wire will be easier than movin...
by msellan
Sun Apr 30, 2017 2:46 am
Forum: Hardware
Topic: ZX8-CCB installation help
Replies: 22
Views: 5580

Re: ZX8-CCB installation help

Hi Karl and Mark, Thanks to you both for your speedy replies! Mark, yes that's what I needed to see. There are three wires coming out of my modulator which look identical. I can find the 5v line easily enough with my meter but how do I know which of the other two is video out? (Besides trial and err...
by msellan
Sat Apr 29, 2017 7:03 pm
Forum: Hardware
Topic: ZX8-CCB installation help
Replies: 22
Views: 5580

ZX8-CCB installation help

Hi all, I'm so excited I just received my two CCB boards from Karl and am itching to install them. I was going to install them just as the instructions say soldering the connection wires to the back of the PCB to the specific ULA pins, but then I saw a thread here: http://www.sinclairzxworld.com/vie...
by msellan
Fri Apr 21, 2017 4:33 am
Forum: Sinclair Misc
Topic: SYNTAX ZX80 and other docs
Replies: 22
Views: 9590

Re: SYNTAX ZX80 and other docs

I wanted to let everyone know that I've heard back from the publisher of SYNTAX and he's happy to let me scan and upload all the issues to the Internet Archive. :D He also mentioned that he originally published the annotated 4K ROM listing and said if I have a copy I could upload that as well. He no...