Search found 242 matches

by nollkolltroll
Fri Oct 12, 2018 4:14 pm
Forum: Hardware
Topic: H4th inverse character bug cured by Andy's ULA
Replies: 7
Views: 379

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: 379

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: 25
Views: 1289

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!
by nollkolltroll
Sun Sep 23, 2018 6:11 pm
Forum: ZX BASIC
Topic: ZX81X2.ROM - and the big bang
Replies: 25
Views: 1289

Re: ZX81X2.ROM - and the big bang

Really amazing work!
by nollkolltroll
Mon Aug 13, 2018 8:31 am
Forum: Sinclair Misc
Topic: ZXZine #5 Posted
Replies: 3
Views: 1054

Re: ZXZine #5 Posted

Nice read!
by nollkolltroll
Fri Jun 08, 2018 8:45 am
Forum: Development
Topic: ZX81 ULA-in-a-CPLD
Replies: 198
Views: 24428

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: 198
Views: 24428

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: 4790

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: 198
Views: 24428

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: 651

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.