Search found 147 matches

by Fruitcake
Sun Sep 05, 2010 12:23 pm
Forum: Sinclair Misc
Topic: ZX80 - abilities, progs, RAMs? Anything?
Replies: 29
Views: 37918

Re: ZX80 - abilities, progs, RAMs? Anything?

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...
by Fruitcake
Fri Sep 03, 2010 2:26 pm
Forum: Sinclair Misc
Topic: ZX80 - abilities, progs, RAMs? Anything?
Replies: 29
Views: 37918

Re: ZX80 - abilities, progs, RAMs? Anything?

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...
by Fruitcake
Thu Sep 02, 2010 8:16 pm
Forum: Hardware
Topic: ZX80 *extremely* low video output
Replies: 7
Views: 2453

Re: ZX80 *extremely* low video output

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...
by Fruitcake
Thu Sep 02, 2010 8:03 pm
Forum: Sinclair Misc
Topic: ZX80 - abilities, progs, RAMs? Anything?
Replies: 29
Views: 37918

Re: ZX80 - abilities, progs, RAMs? Anything?

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 ...
by Fruitcake
Thu Sep 02, 2010 1:05 am
Forum: Software
Topic: Odd Cassette Tape
Replies: 5
Views: 6800

Re: Odd Cassette Tape

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
by Fruitcake
Thu Sep 02, 2010 12:59 am
Forum: Hardware
Topic: ZX80 *extremely* low video output
Replies: 7
Views: 2453

Re: ZX80 *extremely* low video output

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...