Sinclair ZX80 / ZX81 / Z88 Forums

Way back when, I remember typing in a BASIC program from a book that would allow the user to play "music" using the keyboard. The "sound" would be generated by placing an AM radio near the computer. Via a series of loops and calculations, the machine would alter the "pitch" of the RF interference th...

Name of Software: Lunar Corps Author: /u/Droid_Mike (reddit.com) Release Date: July 30,2019 Requirements (eg. 1K, 16K, AY Card, Hi-Res Scheme): 16K Description: This project was a winning entry for the http://www.reddit.com/r/retrobattlestations 4th annual BASIC month contest. It is a modification a...

Name of Software: Lunar Corps Author: /u/Droid_Mike (reddit.com) Release Date: July 30,2019 Requirements (eg. 1K, 16K, AY Card, Hi-Res Scheme): 16K Description: This project was a winning entry for the http://www.reddit.com/r/retrobattlestations 4th annual BASIC month contest. It is a modification a...

A power supply from an old Atari 2600 VCS game console has always worked well for my TS1000 (the US version of the ZX81). Careful if you buy a 3rd party supply. You'll want to have at least 700 mAmps and not all of the 3rd party ones supply that amount.

Congratulations ts_mike. Thanks! I'm glad I got lucky with this one. There are some classic systems that emulate well, like the Commodore 64. The ZX81/TS1000, however, is not one of them. Despite the EXCELLENT simulation of the EOX emulator, the Sinclair's unique keyboard and hardware quirks add an...

I'm happy to report that it seems like things are back up and running now (knock on wood). After installing the ULA heat sink, I put her back together and ran her hard without any problems. I got some blue-tack to stick the 16K rampack on (how come that extremely useful tip never made it to the US?)...

Hello, again! I wanted to give you an update on my TS1000. I installed the heatsink and resoldered the "spring". Things seem to be looking good again, except that it looks like I damaged the keyboard ribbon. All the keys seem to work, except for the numbers 1-5. :( There is no obvious break in the r...

Bummer... No wonder Sinclair struggled in the U.S. (I'll have another posting on that subject in a little bit)

So, while I'm waiting for my ULA heatsink to come in (thank you so much for your help, BTW! :) ), I've been browsing around the net for some info, and I stumbled across this Timex Sinclair 1000 site which is now defunct, but being archived by another sinclair fan: http://forum.tlienhard.com/TS1000/w...

It's been another facepalm day... Had I read further in the eBay description, I would have seen that the heat sink has an adhesive backing. doh! :shock: I've left the sinclair on for about 4 hours and it was still responding to keyboard input, so that's a good sign. After I get the heatsinks in, I'l...