Search found 287 matches

by nollkolltroll
Fri Jun 08, 2018 8:45 am
Forum: Development
Topic: ZX81 ULA-in-a-CPLD
Replies: 233
Views: 52964

Re: ZX81 ULA-in-a-CPLD

This is looking good, can't wait to order a couple when they turn up!
by nollkolltroll
Thu May 17, 2018 1:17 pm
Forum: Development
Topic: ZX81 ULA-in-a-CPLD
Replies: 233
Views: 52964

Re: ZX81 ULA-in-a-CPLD

Very nice to have some proper replacement for our aging HW.
Any plans for further functions, like a super ULA?
by nollkolltroll
Sat Apr 28, 2018 8:34 pm
Forum: Hardware
Topic: ZXPAND and Lambda 8300?
Replies: 28
Views: 9625

Re: ZXPAND and Lambda 8300?

I seem to remember something about the Lambda using 208 cycles per line, whereas the ZX81 uses 207. This is strictly a vague feeling, not something to rely on...
by nollkolltroll
Mon Apr 16, 2018 3:34 pm
Forum: Development
Topic: ZX81 ULA-in-a-CPLD
Replies: 233
Views: 52964

Re: ZX81 ULA-in-a-CPLD

But without the familiar video-disturbance patterns, how will I be able to debug where the code begins/ends?! I'll be lost forever in an endless loop! ;)
by nollkolltroll
Tue Apr 10, 2018 5:46 pm
Forum: GAMES
Topic: "In nihilum reverteris" a big text-adventure game in English (AY music / hi-res)
Replies: 6
Views: 1943

Re: "In nihilum reverteris" a big text-adventure game in English (AY music / hi-res)

yerzmyey: as creative as the spelling is, please change my name to "Adam Klotblixt" in the credits :)

mrtinb: there is a bug in the zxpand seek implementation in EO, update should arrive when SirMorris has had time to act.
by nollkolltroll
Sat Apr 07, 2018 8:07 pm
Forum: Development
Topic: Sketchy - An online screen designer
Replies: 11
Views: 2703

Re: Sketchy - An online screen designer

Just tested it. Works nicely, but the direction keys do not work properly for me. The position is moved, but a '?' is also added.
Linux Mint 18.3, Firefox 59.0.2
by nollkolltroll
Thu Apr 05, 2018 5:00 pm
Forum: ZX BASIC
Topic: Let's calculate! - renewed arithmetic routines
Replies: 33
Views: 9725

Re: Let's calculate! - renewed arithmetic routines

Really impressive coding and testing!
by nollkolltroll
Thu Mar 29, 2018 7:48 am
Forum: Development
Topic: Bad Apple UDG
Replies: 23
Views: 4420

Re: Bad Apple UDG

I am working on the encoder code, but going is slow. Anyone "needing" it can of course get a work-in-progress, but it requires a strong stomach for bad code, as well as some python fluency :)
Contact me in PM for more info.
by nollkolltroll
Thu Mar 29, 2018 7:45 am
Forum: Development
Topic: If you like your submarine simulations fast, arcadey,...
Replies: 46
Views: 9484

Re: If you like your submarine simulations fast, arcadey,...

Oh, and both were switching PSUs with voltage settings. It did not matter what voltage was set, 7/9/11V yielded the same results on both. I haven't looked at the troublesome PSU in a scope, but it might be time for that.
by nollkolltroll
Wed Mar 28, 2018 10:05 pm
Forum: Development
Topic: If you like your submarine simulations fast, arcadey,...
Replies: 46
Views: 9484

Re: If you like your submarine simulations fast, arcadey,...

I had the same problem with both my udg boards. On 3 different zx81s, but sorted as soon as I changed power supply. I guess the first psu was nosiy.