Sinclair ZX80 / ZX81 / Z88 Forums

Tell me more about the "non-flicker", please... Hi Jens You can find details on how the flicker free mechanism works here: http://www.fruitcake.plus.com/Sinclair/ZX80/FlickerFree/ZX80_DisplayMechanism.htm and details on the Space Invaders game here: http://www.fruitcake.plus.com/Sinclair/ZX80/Flick...

As it's a good 20 years or so since I built anything on Veroboard, would you be willing to make a circuit up and let me pay you for it? BTW, the image which shows how to fit the board apears to be missing from your page. Hi Mark Thanks for pointing out about the photo. Yes I am aware of it and will...

Hm. When I try to download the file, I get 404. :( Sorry, I had renamed the file to add a ZX80 suffix but forgotten to uploaded it (I am planning a port to the ZX81 and so wanted to differentiate them via the filename). The original link now works. Hey that looks really good - I presume that it is ...

Try here:
http://www.fruitcake.plus.com/Sinclair/ ... Pacman.htm

Probably a tad late to chip in on this question but the tape is a collection of 1K programs for the ZX81 sold by Michael Orwin (some very good - I remember them well).

You can find some info on the tape here:
http://zx81stuff.org.uk/zx81/generated/ ... ette1.html

It sounds like this could be due to the lack of back porch signal within the composite video output (the same issue that affects early ZX81s). It certainly sounds similar to my ZX80 on certain TVs. If it is due to this issue then it is possible to improve the ZX80 video output by attaching a very si...