Search found 195 matches

by nollkolltroll
Fri Dec 15, 2017 1:19 pm
Forum: Development
Topic: Metropolis, a proper ZX80/81 demo
Replies: 4
Views: 112

Re: Metropolis, a proper ZX80/81 demo

Metropolis started when I decided to get a Minstrel ZX80-clone. Through the years I have wondered what it would be like to code for the ZX80, similar and different as it is from the ZX81 which I am quite familiar with. The result is a graphical demo which works on both the ZX81, and the ZX80 with 8k...
by nollkolltroll
Wed Dec 13, 2017 5:00 pm
Forum: Development
Topic: Metropolis, a proper ZX80/81 demo
Replies: 4
Views: 112

Metropolis, a proper ZX80/81 demo

Here is a release candidate of the demo I've been writing lately. The code is done, but I need testers, so please run it on your HW and give me feedback on how well it ran. When enough tests has been done, I will make a proper release with source code and docs, YouTube video etc. Runs on: ZX80 or ZX...
by nollkolltroll
Thu Dec 07, 2017 7:34 pm
Forum: Development
Topic: ZX80-help needed!
Replies: 6
Views: 197

Re: ZX80-help needed!

The source of the demo will be revealed at release ;) Since I do all the graphics code without any ROM-routines, it boils down to making sure all routines insert HSync at every multiple of 207 cycles. What I had missed was that the start of the program had to delay for a proper amount before startin...
by nollkolltroll
Thu Dec 07, 2017 5:19 pm
Forum: Development
Topic: ZX80-help needed!
Replies: 6
Views: 197

Re: ZX80-help needed!

I got the code working on a ZX81 now. A delayed start and I generate my own HSync at the same time as the ZX81 HW, so it works OK.
by nollkolltroll
Thu Dec 07, 2017 11:23 am
Forum: Development
Topic: ZX80-help needed!
Replies: 6
Views: 197

Re: ZX80-help needed!

I really hoped the ZX81 in FAST mode was like a real ZX80, but it is not. The always on HSync generator disturbs my "magic". I will have a look at the flicker-free stuff and see what has been done there.
by nollkolltroll
Wed Dec 06, 2017 9:02 pm
Forum: Development
Topic: ZX80-help needed!
Replies: 6
Views: 197

ZX80-help needed!

I am developing a graphical ZX80-demo, but I only have a Minstrel to test on. Fine as that machine is, I REALLY would like someone to beta-test on a real ZX80 before I release anything to the public. The code requires a ZX80 with 16k RAM expansion and the 8k ZX81 ROM. A 4k ROM version will be made i...
by nollkolltroll
Tue Nov 21, 2017 6:30 am
Forum: Hardware
Topic: zx spectrum in zx81 case
Replies: 13
Views: 452

Re: zx spectrum in zx81 case

Interesting choice of travel...
Since there is a CPLD or FPGA sitting there, it would presumably be possible to create a ZX80/81/Spectrum switchable in the same case?
by nollkolltroll
Wed Nov 15, 2017 10:00 am
Forum: Hardware
Topic: A zeddy Christmas?
Replies: 6
Views: 178

A zeddy Christmas?

What HW stuff do you all want to get for your ZX81:s for Christmas?
by nollkolltroll
Fri Nov 10, 2017 3:20 pm
Forum: Development
Topic: A big text-game in English. Anybody would code it?
Replies: 10
Views: 323

Re: A big text-game in English. Anybody would code it?

I've had some thoughts about this before and found that both basic and C would be good candidates for such a project.
The clue is to make each location fit in 32kb together with the data needed to stitch everything together.
by nollkolltroll
Fri Nov 03, 2017 4:18 pm
Forum: Development
Topic: ZXpand+ A/V player
Replies: 10
Views: 335

Re: ZXpand+ A/V player

Someone could probably spend WAY too much time just fixing the greyscale conversion just right and syncing the notes to the videoframes. Not to mention actually rearrange the musical piece...