Search found 1512 matches

by Paul
Thu Mar 14, 2024 3:49 pm
Forum: Hardware
Topic: Atari joystick without ZXpand+
Replies: 33
Views: 1065

Re: Atari joystick without ZXpand+

JOY81 - Programmable Joystick Interface for ZX81
Can be found in this forum.
https://www.sinclairzxworld.com/viewtop ... ilit=Joy81
by Paul
Tue Mar 12, 2024 1:28 pm
Forum: Hardware
Topic: Spectrum modded / composite question
Replies: 19
Views: 710

Re: Spectrum modded / composite question

I'm not Shure. Two or three posts.
Don't worry, I read them anyway :mrgreen:
It just takes some time if I am at work.
by Paul
Tue Mar 12, 2024 1:10 pm
Forum: Hardware
Topic: Spectrum modded / composite question
Replies: 19
Views: 710

Re: Spectrum modded / composite question

My wife told me to dump everything I hadn't touched within two years.
Now she is my ex wife :mrgreen:
by Paul
Thu Feb 29, 2024 3:44 pm
Forum: Hardware
Topic: ZX81 toZX80 conversion.
Replies: 22
Views: 1727

Re: ZX81 toZX80 conversion.

There is always a little uncertainty which port needs to be connected to which cassette recorder connector :lol:
by Paul
Thu Feb 29, 2024 3:20 pm
Forum: Hardware
Topic: ZX81 toZX80 conversion.
Replies: 22
Views: 1727

Re: ZX81 toZX80 conversion.

Well, if you take away the cooling pad and desolder the modulator you might be able to put the ZX81 PCB upside down into the top right corner the connections could be in the correct order for power and tape. If you resolder the modulator to the bottom side of the PCB it might nearly line up with the...
by Paul
Thu Feb 22, 2024 9:41 am
Forum: Hardware
Topic: ZX81 toZX80 conversion.
Replies: 22
Views: 1727

Re: ZX81 toZX80 conversion.

Moggy wrote: Wed Feb 21, 2024 10:44 pm Just thought it might be of interest.
Hi Moggy,
I think it is of interest and as it's still fresh, could you please add some links for interested people to those pdf in the forum and also to the four resistor add-on.
Oldies like you and I know, but there are newbies out there as well :ugeek:
by Paul
Thu Feb 22, 2024 9:31 am
Forum: Hardware
Topic: ZX81 toZX80 conversion.
Replies: 22
Views: 1727

Re: ZX81 toZX80 conversion.

I can't work those CAD programs but a 3D printed ZX81 top case with the added ZX80 hood would be a funny thing to own :mrgreen:
by Paul
Wed Feb 21, 2024 5:33 pm
Forum: Welcome Area
Topic: Hello from Poulette73
Replies: 13
Views: 1215

Re: Hello from Poulette73

I wish you success with the AV conversion.
Please make sure which Modulator and video circuit you have.
There are UK US and French models as well.
Please compare with the circuit diagram.
by Paul
Wed Feb 21, 2024 5:54 am
Forum: Hardware
Topic: I've borked it
Replies: 123
Views: 5331

Re: I've borked it

(Pseudo)static RAM chips can easily be tested with a retro chip tester.
I don't know who in the UK owns one and would offer to test your chips.
I have one but living in Germany postage would be ridiculous.
by Paul
Wed Feb 14, 2024 6:25 am
Forum: ZX BASIC
Topic: shorten basic files saved to wespi
Replies: 5
Views: 401

Re: shorten basic files saved to wespi

I haven't checked the poke. But you have to execute NEW instead of clear. There is a way to reduce it without retyping: Reduce RAMTOP to 2K and new. Now you can load from wespi. After this execute CLS, then save again. The ZX81 collapses the screen if less than (not exactly shure) 3K of RAM is avail...