Search found 325 matches

by nollkolltroll
Thu Oct 01, 2015 9:18 pm
Forum: Software
Topic: Turbo load working
Replies: 1
Views: 2064

Turbo load working

I finally got some time to test OTLA. I found that I can reliably load at 12000 bps on both my ZX81s from my Linux PC. 16200 works only sometimes so I won't use that. Yes, the program works under wine. The only thing I miss is a command-line utility that converts with this method. The GUI is usable,...
by nollkolltroll
Thu Oct 01, 2015 8:59 pm
Forum: Development
Topic: FullHD81 - an improved video driver
Replies: 36
Views: 11988

Re: FullHD81 - an improved video driver

Very nice indeed!
by nollkolltroll
Thu Apr 16, 2015 1:06 pm
Forum: Sinclair Misc
Topic: Off topic, but very interesting... (OT)
Replies: 3
Views: 2250

Re: Off topic, but very interesting... (OT)

Too bad the zeddy does not run 3.58*2 MHz, then we MIGHT have been able to make a colour-burst directly after the sync and generate NTSC-colour.
Oh, well, at least we can generate interlaced hi-res :D
by nollkolltroll
Thu Mar 05, 2015 8:07 am
Forum: Development
Topic: ZX81 hi-res Graphic Contest?
Replies: 33
Views: 15924

Re: ZX81 hi-res Graphic Contest?

Nope, no link. I will dig out the code later and post it.
by nollkolltroll
Wed Mar 04, 2015 7:43 am
Forum: Development
Topic: ZX81 hi-res Graphic Contest?
Replies: 33
Views: 15924

Re: ZX81 hi-res Graphic Contest?

Is there really no slideshow program? Weird. It's as if the ZX81 was never meant to display hires, or read files from a filing system... ;) Does anyone use Z88DK on their Mac? I can't find any practical help in getting set up for this. Stefano - Is there a how-to anywhere please? C Well, I've done ...
by nollkolltroll
Thu Feb 26, 2015 11:08 am
Forum: Development
Topic: True interlaced hires graphics
Replies: 19
Views: 9279

Re: True interlaced hires graphics

The bmp-file has a header, which can be a different size depending on what program saved it. The picture I used had a 146-byte header, your picture uses 62 bytes. This means the picture starts in the wrong place, is shifted sideways a number of bytes. Try changing the line: file 'oki.bmp':146 to: fi...
by nollkolltroll
Wed Feb 25, 2015 7:25 am
Forum: Development
Topic: True interlaced hires graphics
Replies: 19
Views: 9279

Re: True interlaced hires graphics

User@lab1: could you make a screenshot of the pic so I could try to understand what is happening? Time files... but my memories of it is that you need to have it as a bmp with a 62-byte header, up-side-down and color-inverted. All of this could be handled in software of course, but this was just a p...
by nollkolltroll
Sun Dec 28, 2014 10:26 pm
Forum: Development
Topic: ZXmore or the ZX80CORE follow-up
Replies: 264
Views: 92183

Re: ZXmore or the ZX80CORE follow-up

REALLY nice! Looking forward to more specs. Q: is the 6.5MHz mode possible to control by program, so it would be possible to make a VGA-compatible 256 pixel driver, or a 512 pixel composite video driver? Or is the video not software controlled? Maybe the CP/M mode has some other type of video driver...
by nollkolltroll
Sat Dec 27, 2014 1:58 pm
Forum: Development
Topic: IX, IY and shadow registers
Replies: 11
Views: 7876

Re: IX, IY and shadow registers

So it seems Zilogs original intention of the shadow registers, to have fast interrupt context switch, is not what it is mainly used for? You do other tricks with BC', DE' & HL'. I guess that's understandable, since they ARE available on the zeddy. Are IX/IY available on the speccy? Trying to get a f...
by nollkolltroll
Fri Dec 26, 2014 10:02 pm
Forum: Sinclair Misc
Topic: New years resolution 2015
Replies: 6
Views: 4308

New years resolution 2015

I intend to code and build more for the zx81, compared to 2014.