Sinclair ZX80 / ZX81 / Z88 Forums

This article may clear the air: https://www.tandfonline.com/doi/full/10.1080/23311983.2016.1190441 QS certainly made their own hardware. Apparently, QS licensed some games from Indescomp at one point (see the wikipedia article). That may have had something to do w/ Indescomp manufacturing QS hardware.

The 4093 is often used to make an oscillator in the synth community. My suspicion is that it's a "beeper": when any key is pressed, it beeps. There were more than a few designs for this in the US.

Yea, never heard from him.

Hi DrV, Welcome and congrats on getting your ZX81 working :) You'll find a lot of useful info on my website: https://www.timexsinclair.com/ In particular, look under the Type-in Program tab of this page: https://www.timexsinclair.com/computers/timex-sinclair-1000/articles/ (it can take a second to l...

Hey! Can you PLEASE scan the manual? I have had this printer since 1984ish and I never had a manual. Just some hand-written notes. Also, where did order ribbons from? I got you! Here's the manual: https://archive.org/details/mindware/Mindware%20MW-100%20manual?view=theater Here's a compatible ribbo...

Some of Rick Dickinson’s design drawings are available online. They show an interesting progression of the design process. Given that the Microace is an illegal copy, I don’t think it would have had much concious influence. Both the ZX80 and Microace use vacuum formed cases. It’s a reasonably priced...

Here's a little bit about the Winky Board 2: https://www.timexsinclair.com/product/winky-board-2/ And the company: https://www.timexsinclair.com/company/g-russell-electronics/ The Central PA ZX/TS User's Group: https://www.timexsinclair.com/usergroup/central-pennsylvania-zx-ts-users-group/ And that ...

Yes: the 78L12 needs 15 volts to deliver 12. The 12v is mainly for the video chip. Even so, the it’s under sized. Replacing the 78L12 with a 7812 will improve the video a bit.

You'll find some resources over here: https://www.timexsinclair.com/computers ... lair-1000/

That's my read: write the program, compile, then load for execution. I think it's more a system for teaching Pascal than for anything actually useful.