Sinclair ZX80 / ZX81 / Z88 Forums

... and here is a pdf that caused me a lot of embarrassment: https://www.academia.edu/2189573/Archaeological_research_using_the_ZX81_SYNC_New_York_Vol._3_No._2_March_April_1983_22-27 I was at a Club meeting with about 100 members and suddenly Pete Harvey stood up and said: John Castillos, our Librar...

THANK YOU, SUPERFO, FOR THIS !! If you check SINC LINK Vol. 7 No. 1 1989 in page 3 George Chambers wrote a history of our Club and in page 3 he mentions me (John Castillos) in a very funny way. He was a very good chap, I doubt he still lives since he was then a retired person past middle age, but I ...

zx81jens,

No, I hadn't read it, it seems fun, I wish it were available all as a pdf so I could read it at leisure rather than having to open every htm...

Thanks, I was actually one of the founders of the club that then became North American, with hundreds of members, I recall one even from the wilds of Arkansas who ran his ZX81 with batteries because he had no grid power available. I brought back a complete catalogue of our software as well as all th...

You may enjoy this Newsletter of our ZX81 group.

OK, after quite a while the ZX81 and Spectrum folks here in Uruguay bought much of the ZX81 stuff I had but so far have shown no inclination to go for this unique software collection. So it doesn't go unused anymore, I decided to put it up for sale here. We're talking of 12 black plastic boxes with ...

Dear friends, I was the Librarian of a North America Timex/Sinclair Users Club with hundreds of members. When I came to live in Uruguay I brought all those masters recorded in 48 good quality tapes full of more than one thousand such software, to which I added numerous other scientific programs that...

Sorry, but that is going to be difficult because the ZX81 has a Memopak 64K memory attached with very high quality two-way sticky tape that over 30 years has become quite solid and refuses to budge, I fear if I try too hard I'll break something. I bought it from one of the many adds in ZX magazines,...

Hey guys, it's me again, I just found some ZX81 hardware and forgot how to use it . It's a little microchip board that gives high resolution to your games, you have to poke 16515, something and the same to go bck to normal pixels. I lost the instructions, how to use it, so if any of you also bought ...

Even if you don't have the manual but had it and used it, some instructions as to the program and how to run it in order to make sounds that can be later combined into words, would be much appreciated.