Search found 269 matches

by nollkolltroll
Sat Jan 12, 2019 9:05 am
Forum: Software
Topic: ZX81CRSS.ASM
Replies: 12
Views: 3290

Re: ZX81CRSS.ASM

Very nice way to save some bytes in 1k-mode, which is truly needed.
by nollkolltroll
Sat Dec 22, 2018 6:56 pm
Forum: Development
Topic: New year, new projects?
Replies: 2
Views: 636

New year, new projects?

A new year is looming on the near horizon, and so I wonder if you have any SW projects that you plan on creating or releasing in 2019? Please share, entice and inspire! I have one recent almost finished project that only need documentation and packaging before release, very low level graphics in nat...
by nollkolltroll
Thu Dec 13, 2018 1:44 pm
Forum: GAMES
Topic: My games in 2018...
Replies: 1
Views: 820

Re: My games in 2018...

Lots of cheers to you, may you enjoy many more programming challenges!
by nollkolltroll
Sun Dec 09, 2018 5:36 pm
Forum: Development
Topic: Tapestry wide
Replies: 6
Views: 1207

Re: Tapestry wide

Brilliant stuff indeed, Shame the humble zeddy doesn't have sprites... Imagine some awesome scrolling action games... Zedragon already uses this technique to a very good effect. I think a decent shoot-em-up would be possible, somewhere along the lines of R-type maybe? I won't do it though, not my c...
by nollkolltroll
Fri Dec 07, 2018 12:41 pm
Forum: Development
Topic: Tapestry wide
Replies: 6
Views: 1207

Re: Tapestry wide

Tapestry wide v1.0 ------------------ For a very long time I've admired the demo effect of scrolling or panning a long picture. Not for its technical merit, which is not that hard to do, but for its artistic value in presenting still pictures that morph. M.C. Escher is a long time favorite artist of...
by nollkolltroll
Fri Dec 07, 2018 12:27 pm
Forum: Development
Topic: Tapestry wide
Replies: 6
Views: 1207

Tapestry wide

I've done another program that streams a graphics file from the ZXpand SD-card at 50fps. This time I used a 320-pixel wide video mode, scrolling 2 pixels per frame. The video memory layout is a bit complex as it only uses 8kb RAM. The jittery left/right columns are hidden in the border on most TVs. ...
by nollkolltroll
Tue Nov 27, 2018 3:32 pm
Forum: Development
Topic: Tapestry scroller
Replies: 0
Views: 1091

Tapestry scroller

For a very long time I've admired the demo effect of scrolling or panning a long picture. Not for its technical merit, which is not that hard to do, but for its artistic value in presenting still pictures that morph. M.C. Escher is a long time favorite artist of mine, and his Metamorphosis I+II+III ...
by nollkolltroll
Fri Oct 12, 2018 4:14 pm
Forum: Hardware
Topic: H4th inverse character bug cured by Andy's ULA
Replies: 7
Views: 1457

Re: H4th inverse character bug cured by Andy's ULA

Interesting to know if the Timex ULA works differently in this regard. Anyone up for testing?
by nollkolltroll
Fri Oct 12, 2018 3:18 pm
Forum: Hardware
Topic: H4th inverse character bug cured by Andy's ULA
Replies: 7
Views: 1457

Re: H4th inverse character bug cured by Andy's ULA

I've seen this when using the ROM display driver and printing 34 characters without an ending halt-character. To my understanding, this is t unfortunately the behaviour of the original ULA hw that somehow ignores the invert-bit after only 2 pixels.
by nollkolltroll
Mon Sep 24, 2018 9:01 am
Forum: ZX BASIC
Topic: ZX81X2.ROM - and the big bang
Replies: 36
Views: 7668

Re: ZX81X2.ROM - and the big bang

Since the use of this requires a new EPROM anyway, burning a dual rom with a switch is a really good way to go. Speed from the new rom for most things, and a fallback to original rom if/whenever things mess up. Just fantastic!