Search found 391 matches

by stefano
Thu Jun 06, 2019 1:39 pm
Forum: Software
Topic: Programs which use Hi-Res Graphics on the Sinclair ZX81
Replies: 21
Views: 145323

Re: Programs which use Hi-Res Graphics on the Sinclair ZX81

I found recently an article on an old 1983 Italian magazine (Elettronica 2000) describing an Hi-Res board for the ZX81. http://speccybits.altervista.org/scansioni/e2000_46.rar This article describes a board (including its layout) which is most probably a QS HI-RES clone (the text refers to a resolut...
by stefano
Sat Mar 02, 2019 10:16 pm
Forum: Emulators
Topic: bugs found on eo
Replies: 14
Views: 2285

Re: bugs found on eo

you are right, the glitch exists, and has to do with my driver (I'm not sure why it happens, nor if it is visible on the real zx81). also the frequencies are probably odd, I thought that my theories were right after the successful tests and the confirmation of the test on a real hardware (on a flat ...
by stefano
Mon Jan 21, 2019 10:16 pm
Forum: GAMES
Topic: Murgatroyd's Revenge (1982) found and uploaded
Replies: 2
Views: 865

Re: Murgatroyd's Revenge (1982) found and uploaded

Many thanks, I also enjoyed the story you just told us, a friend said that his favourite one on the zx81 was the flight simulator, he and his brother used to share the keyboard (and the fun) and drive the plane together.. those memories are very strong :)
by stefano
Mon Jan 21, 2019 9:52 pm
Forum: GAMES
Topic: Missione Impossibile (1985)
Replies: 3
Views: 474

Re: Missione Impossibile (1985)

sooner or later I'll try to resample the tape
by stefano
Mon Jan 21, 2019 9:51 pm
Forum: GAMES
Topic: Missione Impossibile (1985)
Replies: 3
Views: 474

Re: Missione Impossibile (1985)

too late.. I had the wave on a computer I had to quickly dismantle :(
by stefano
Mon Jan 21, 2019 3:34 pm
Forum: Emulators
Topic: bugs found on eo
Replies: 14
Views: 2285

Re: bugs found on eo

The attached programs runs only on the old (original) EightyOne version 0.42(Test Z), and only with the NTSC mode disabled and M1NOT circuit disabled. I hope I haven't mixed the files but it should be the same binary which worked on a real ZX81: https://www.z88dk.org/wiki/lib/exe/fetch.php?cache=&me...
by stefano
Mon Jan 21, 2019 3:08 pm
Forum: GAMES
Topic: MICROMAN
Replies: 17
Views: 3379

Re: MICROMAN

.. by the way I'm not able to run the last versions I posted for the Memotech. I recently claimed about problems with some EightyOne version not correctly behaving, but now I'm even more confused because some program just runs everywhere :oops: What I can do is to post a recent build of Microman for...
by stefano
Mon Jan 21, 2019 1:47 pm
Forum: GAMES
Topic: MICROMAN
Replies: 17
Views: 3379

Re: MICROMAN

I notice after long time that I never answered, it is clearly necessary a bit of explanation. The "microman" game is a demonstration program I wrote in C for the z88dk. The game comes with few preset options, intended to slightly adjust it to the different display and memory capabilities but the res...
by stefano
Mon Jan 21, 2019 1:16 pm
Forum: GAMES
Topic: Missione Impossibile (1985)
Replies: 3
Views: 474

Missione Impossibile (1985)

I rescued this games from the original tape, I don't find it particularly interesting but it is probably "missing in action" and perhaps some Italian nostalgic played it long ago, so.. here it is !
by stefano
Sat Jan 19, 2019 11:45 pm
Forum: Emulators
Topic: bugs found on eo
Replies: 14
Views: 2285

Re: bugs found on eo

forgot to mention : I think the memotech hrg bug was introduced long ago, the microdrive one could have always been present