Sinclair ZX80 / ZX81 / Z88 Forums

The Chroma 81 interface is now available, with an announcement posting here:
viewtopic.php?f=7&t=1495

blittled wrote:I wonder if this will do NTSC output for use in the USA.

The logic has been designed to auto detect and support NTSC but this functionality has not been tested.

I’m pleased to announce the launch of the Chroma 81 interface, a new multi-purpose interface for the ZX81. Its primary function is to allow the ZX81 to be connected to a TV via a SCART socket using an RGB connection to produce a picture that is sharp and bright. The Chroma interface plugs into the e...

Many of the programs appear to have been sourced from The Type Fantastic website http://www.users.globalnet.co.uk/~jg27p ... pehome.htm, and I suspect many of page scans from the World of Spectrum magazine archive ftp://ftp.worldofspectrum.org/pub/sinclair/magazines.

I would guess the person that made contact was referring to this paragraph: The other main reason for replacing the keyboard has to be where you acquire a ZX80 computer which has been 'upgraded' to a Sinclair ZX81 (reducing its value substantially). This upgrade consisted of a replacement ROM chip a...

The layouts of the classic arcade games are actually quite well suited to the ZX80 and ZX81 display capabilities. In case ZX81 users are feeling a little left out, I've now ported versions of the games to run on the ZX81. They can be downloaded from the following pages: http://www.fruitcake.plus.com...

yerzmyey wrote:Hehe guys, if You actually will do another non-flickering game for ZX80, then I would be *really* impressed.

How about this?

http://www.fruitcake.plus.com/Sinclair/ ... 0_Kong.htm

Another source ofd ZX80 programs is Jim Grimwood's The Type Fantastic website: http://www.users.globalnet.co.uk/~jg27paw4/type-ins/typehome.htm This has a number of type-in programs for the ZX80 from various computer magazines that have been typed in and made available for download. Of note I recomm...

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 ...