Search found 542 matches

by stefano
Mon Nov 03, 2014 10:20 am
Forum: Software
Topic: Rom hex file help
Replies: 59
Views: 26087

Re: Rom hex file help

You're absolutely right ! Apologies for having increased the entropy :/ I just discovered that EightyOne had and probably still has a small timing bug (1T difference probably raising from the Z80 emulation engine) which could have been a good reason to patch the original ROM. I'm curious now, prehap...
by stefano
Mon Nov 03, 2014 9:32 am
Forum: Hardware
Topic: AZMIC ROM
Replies: 36
Views: 20262

Re: AZMIC ROM

"The other issue of the sloping display is the kind that gives my nightmares... I have a 1-T error in my z80 core somewhere that Azmic has just discovered. MikeW Uh, wow.. this explains few things on the difficulties I was having to get a stable display with some z88dk program, expecially when work...
by stefano
Sun Nov 02, 2014 12:35 pm
Forum: Hardware
Topic: Chroma 81 - SCART and Colour interface for the ZX81
Replies: 158
Views: 98465

Re: Chroma 81 - SCART and Colour interface for the ZX81

For those who may be interested.. the default text mode on z88dk is "case sensitive", which means it uses the normal characters for the lowercase characters and the inverted mode for the uppercase stuff. This came after a Siggi's suggestion trying to squeeze the maximum from the console and being ab...
by stefano
Sat Nov 01, 2014 9:37 pm
Forum: GAMES
Topic: DarkStar 2
Replies: 70
Views: 52391

Re: DarkStar 2

While you're on it, could you try the 'vanilla' version on the real hardware and confirm the video picture is stable on a tv ?
by stefano
Fri Oct 31, 2014 7:42 pm
Forum: Software
Topic: Rom hex file help
Replies: 59
Views: 26087

Re: Rom hex file help

Yes, also the europe/america diode trick is great !

About the ROMs.. I don't think they're tweaked, my impression is that h4th was for a 60hz raster only while aszmic was for 50hz only.
At least it's the way EightyOne behaves.
by stefano
Fri Oct 31, 2014 6:16 pm
Forum: GAMES
Topic: More games from Kabuto Factory
Replies: 2
Views: 1732

Re: More games from Kabuto Factory

I like Zombie Terror.. looks quite simple but it is very well presented.
by stefano
Fri Oct 31, 2014 6:08 pm
Forum: GAMES
Topic: DarkStar 2
Replies: 70
Views: 52391

Re: DarkStar 2

Hmm.. sorry !
Try using 'm'
by stefano
Fri Oct 31, 2014 2:58 pm
Forum: Software
Topic: Rom hex file help
Replies: 59
Views: 26087

Re: Rom hex file help

Interesting indeed ! I also noticed that with EightyOne, even if possible, is not easy to understand that you can run zx81 ROM on a ZX80: It was an official retrofit, even if it couldn't go in SLOW mode. I suspect that the G007 was able to run on a retrofitted zx80 since it patches both the FAST and...
by stefano
Fri Oct 31, 2014 11:10 am
Forum: Hardware
Topic: Chroma 81 - SCART and Colour interface for the ZX81
Replies: 158
Views: 98465

Re: Chroma 81 - SCART and Colour interface for the ZX81

Love the colourization trick !

I suppose you had a thought about supporting some kind of lambda compatibility, is it just still not present or it has been avoided for specific reasons ?
by stefano
Fri Oct 31, 2014 10:23 am
Forum: ZX Spectrum Lounge
Topic: ZX Spectrum - Multi I/O Board - NEW
Replies: 2
Views: 6129

Re: ZX Spectrum - Multi I/O Board - NEW

The best known DAC audio application for the Spectrum was the SpecDrum. Someone was able to change its output ports and redirect to the Disciple printer port with the "Covox" style DAC on it. The digital outputs could perhaps be driven by my program for the "Psychedelic Lights", provided you build a...