Search found 177 matches

by kmurta
Thu Oct 15, 2020 9:13 pm
Forum: Software
Topic: BR programs recovery
Replies: 3
Views: 1935

Re: BR programs recovery

Here are the converted programs, the "Demolidor" must be run at 60Hz (NTSC), but in the EightyOne emulator the screen is shifted to the left. Both would run at 2Kb, but interestingly they were saved with the entire screen file, without compression, so you need more memory to load them. Demolidor.p M...
by kmurta
Thu Oct 15, 2020 8:41 pm
Forum: Welcome Area
Topic: Hello from Brazil
Replies: 3
Views: 1781

Re: Hello from Brazil

Hello Rogério, welcome!

I am also from Brazil and my first computer was also a TK82 and I still have it!
by kmurta
Sat Sep 26, 2020 5:41 pm
Forum: Development
Topic: Splash Scree
Replies: 10
Views: 8280

Re: Splash Scree

There is this very good app that I use to create animated gifs, GIFCAM:

http://blog.bahraniapps.com/gifcam/
by kmurta
Sun Aug 16, 2020 7:11 pm
Forum: Software
Topic: 2001 - A ZX81 Odyssey
Replies: 1
Views: 5080

Re: 2001 - A ZX81 Odyssey

Very good! It produces a very cool and hypnotic effect!
by kmurta
Sun Aug 02, 2020 6:49 pm
Forum: Development
Topic: Counting TStates
Replies: 3
Views: 5143

Re: Counting TStates

It is still manual calculation (and when you start seriously to count TStates you'll know the single instruction ones by heart ;)). Indeed, semi manual, you still have to calculate the total cycles in loops and conditional jumps, but it helps a lot to visualize the count of cycles and bytes of the ...
by kmurta
Tue Jul 28, 2020 8:02 pm
Forum: Development
Topic: Counting TStates
Replies: 3
Views: 5143

Re: Counting TStates

Recently I started using sjasmplus with the Visual Studio Code + Z80 Assembly Meter extension and I'm really enjoying it, just select the code with the mouse and you have the count of bytes and T-states displayed in the status bar. Very practical! https://code.visualstudio.com/ https://github.com/z0...
by kmurta
Sat Jul 25, 2020 11:29 pm
Forum: Development
Topic: What's the deal with EXX
Replies: 2
Views: 4930

Re: What's the deal with EXX

The EXX instruction can be used safely as long as there is no return to BASIC through the USR function, for the reason exposed by olofsen. If you need to return to BASIC after using EXX, you can use one of the alternatives: 1- save the HL' contents: EXX PUSH HL ... your code POP HL EXX 2. or return ...
by kmurta
Fri Jun 26, 2020 12:54 am
Forum: GAMES
Topic: [WHERE TO FIND]PROTEUS for ZX81
Replies: 34
Views: 21964

Re: [WHERE TO FIND]PROTEUS for ZX81

It's one of those games from South America, where you need to set your ZX81 to "NTSC". Because on "PAL" the game is simply too fast. At the end of the game a screen is displayed where you can select the game speed, select "LENTO = 8". But it is still fast on "PAL" machines. The ideal is to find the...
by kmurta
Thu Jun 25, 2020 8:38 pm
Forum: GAMES
Topic: [WHERE TO FIND]PROTEUS for ZX81
Replies: 34
Views: 21964

Re: [WHERE TO FIND]PROTEUS for ZX81

It's one of those games from South America, where you need to set your ZX81 to "NTSC". Because on "PAL" the game is simply too fast. At the end of the game a screen is displayed where you can select the game speed, select "LENTO = 8". But it is still fast on "PAL" machines. The ideal is to find the...
by kmurta
Fri Jun 05, 2020 4:19 pm
Forum: Development
Topic: Developing new ZX81 Video Driver
Replies: 22
Views: 21673

Re: Developing new ZX81 Video Driver

msch wrote: Thu Jun 04, 2020 10:37 pm
„Rich“ wrote:Unfortunately, there were attachments which were lost some years ago - I assume it is the ones before 2010.
Thank you for trying to find the files!