Search found 1393 matches

by mrtinb
Thu Jun 24, 2021 5:43 pm
Forum: Development
Topic: NEW GAME: SUB vs SUB
Replies: 12
Views: 457

Re: NEW GAME: SUB vs SUB

Since the game is coded in Basic, a WRX version would be difficult.
by mrtinb
Sun Jun 20, 2021 10:26 pm
Forum: Software
Topic: Pascal for ZX81
Replies: 28
Views: 3994

Re: Pascal for ZX81

It does not look like other p-code documentation I’ve found. It seems it has it’s own proprietary p-code.

I had hoped I could make a plain machine code binary with this program, but unfortunately that will require a lot of hacking, including having the interpreter in the binary as well.
by mrtinb
Sat Jun 19, 2021 9:17 pm
Forum: Development
Topic: Assemblers for the ZX80
Replies: 5
Views: 190

Re: Assemblers for the ZX80

I think most programming started with a hex loader. A good place to start is Mastering Machine Code on Your ZX81 or ZX80, chapter 2. This chapter explains how to enter programs even on 1k. In this book, ZX80 is referred to as the "OLD ROM".
by mrtinb
Tue Jun 15, 2021 3:00 pm
Forum: Development
Topic: Let's talk about Hi-Res truth and myths, I'm angry.
Replies: 6
Views: 562

Re: Let's talk about Hi-Res truth and myths, I'm angry.

You need to use the Windows program to find which patterns are possible.
by mrtinb
Fri Jun 11, 2021 11:08 pm
Forum: Software
Topic: FIF. Another FORTH.
Replies: 155
Views: 13422

Re: FIF. Another FORTH.

Two first words in my collection.

Image
by mrtinb
Fri Jun 11, 2021 1:29 pm
Forum: Development
Topic: Let's talk about Hi-Res truth and myths, I'm angry.
Replies: 6
Views: 562

Re: Let's talk about Hi-Res truth and myths, I'm angry.

On the same home page, you can find the Celebration Demo. On this page your can download the Lightning Pseudo Hires Driver Source. With this source you can use many of the same tricks from the games. Try it out.
by mrtinb
Mon Jun 07, 2021 7:33 am
Forum: ZX BASIC
Topic: Can't make anything fit into 1K... or is it me?
Replies: 29
Views: 3073

Re: Can't make anything fit into 1K... or is it me?

Andre wrote: Mon Jun 07, 2021 4:17 am ANDRE***
Great to see you back at the forum. I personally love ZX91 magazines you’ve created.
by mrtinb
Mon May 31, 2021 9:11 pm
Forum: Hardware
Topic: Help on MIC-Output ZX81
Replies: 20
Views: 1517

Re: Help on MIC-Output ZX81

Sorry I haven’t followed this thread. Big delivery at work. I haven’t made any special hardware to load files. I simply have a home made TZXduino, which standard firmware outputs 0V or 5V on a pin. This is fed directly into the EAR of ZX81. If you measure this on playback you’ll get the average 2.5V...
by mrtinb
Sun May 30, 2021 10:22 pm
Forum: ZX BASIC
Topic: Writing data files
Replies: 6
Views: 622

Re: Writing data files

You don’t need GOTO 100, to restart, as the program will continue where it left off.
by mrtinb
Sun May 30, 2021 1:55 pm
Forum: ZX BASIC
Topic: Writing data files
Replies: 6
Views: 622

Re: Writing data files

ZX81 does not support data files. But if you SAVE within a program, the state of the variables and program position is saved as well. When the program is loaded, the program continues, where it left off. Third party hardware might support saving any memory location to a file. Like ZXpand, ZXblast, ...