Search found 753 matches

by mrtinb
Sun Sep 09, 2018 8:11 pm
Forum: Hardware
Topic: Dead ZX81.
Replies: 10
Views: 374

Re: Dead ZX81.

In Denmark we call it snow or snow weather.
by mrtinb
Sat Sep 08, 2018 3:22 pm
Forum: Hardware
Topic: ZX81 External Keyboard
Replies: 16
Views: 516

Re: ZX81 External Keyboard

The German forum has designed a new controller and new keyboard with cherry keys with ZX81 symbols. It might be a product to buy soon.

Edit: Link to keyboard in German forum
by mrtinb
Fri Sep 07, 2018 1:11 pm
Forum: Hardware
Topic: ZX81 External Keyboard
Replies: 16
Views: 516

Re: ZX81 External Keyboard

I used Wilf Rigter's schematic to create my own external keyboard controller. I'm sold out of the pcbs I made. It was my first electronics project, so anyone should be able to do it.
by mrtinb
Thu Sep 06, 2018 10:22 pm
Forum: ZX BASIC
Topic: BASIC drawing proggy
Replies: 14
Views: 566

Re: BASIC drawing proggy

As you can see in many threads on this forum, the general problem with the 16K RAMpack is bad capacitors.

You could open it up and replace the capacitors, and that might fix your RAMpack.
by mrtinb
Thu Sep 06, 2018 7:17 pm
Forum: ZX BASIC
Topic: Small memory dump program
Replies: 14
Views: 760

Re: Small memory dump program

You could start a new.
by mrtinb
Wed Sep 05, 2018 1:22 pm
Forum: ZX BASIC
Topic: Small memory dump program
Replies: 14
Views: 760

Re: Small memory dump program

If you have a PC soundcard that can record the very low recording signal from ZX81, you can data to your PC as .WAV file, and that file can be loaded in EightyOne emulator as well.

(Then you can continue playing until your ZXpand arrives.)
by mrtinb
Wed Sep 05, 2018 12:55 pm
Forum: ZX BASIC
Topic: Small memory dump program
Replies: 14
Views: 760

Re: Small memory dump program

If you implement SAVE in your program, the generated .P file can be moved to your PC with the SD-card. Your emulator could then load your file.
by mrtinb
Wed Sep 05, 2018 12:16 pm
Forum: ZX BASIC
Topic: Small memory dump program
Replies: 14
Views: 760

Re: Small memory dump program

If you don't need to load the pictures again, but just needs to look at them, the you can just use the COPY command to print the screen's content to the printer. This will work both in EightyOne and on real hardware.

Edit: In the emulator you can save the printer-output to an image file.
by mrtinb
Wed Sep 05, 2018 12:07 pm
Forum: ZX BASIC
Topic: Small memory dump program
Replies: 14
Views: 760

Re: Small memory dump program

ZX81 does not support data files.

However you can SAVE in a program, and the program including it's state is saved. When the program is loaded again, it continues on the line after the SAVE.
by mrtinb
Tue Sep 04, 2018 10:47 am
Forum: Software
Topic: Cross Chase on Lambda 8300
Replies: 3
Views: 251

Re: Cross Chase on Lambda 8300

Both DStar and CrossChase work great on Lambda1. CrossChase however i very difficult with the rubber keys compared to the emulator. It seems as there is a delay from press to reaction. Often I die walking into the borders - and thinking I didn't walk that far. I'll try to play it a little more to se...