Search found 124 matches

by nama
Mon Oct 09, 2017 10:16 am
Forum: Hardware
Topic: Query on a Issue 1 ZX81
Replies: 34
Views: 5169

Re: Query on a Issue 1 ZX81

Just got given another ZX81, and look what board was inside:
IMG_6301.JPG
(852.33 KiB) Downloaded 209 times
by nama
Sat Oct 07, 2017 10:53 pm
Forum: Emulators
Topic: ZX81 emulator for iOS
Replies: 75
Views: 7811

Re: ZX81 emulator for iOS

Hi Kevin, Much thanks for the reply. I understand now, and actually stand corrected. I thought I had the latest version, but after updating I see the game plays great. I'm not sure if the update had anything to do with the issue however. I also tried it on my wife's iPad and it played even better. I...
by nama
Fri Oct 06, 2017 8:38 pm
Forum: Emulators
Topic: ZX81 emulator for iOS
Replies: 75
Views: 7811

Re: ZX81 emulator for iOS

Hi, Is there a way to have an option where the virtual joystick activates in 'single push' mode. In other words, and as an example, if you push the virtual joystick left, and continue to hold it left, can it just be register as a single keystroke (on then off), as opposed to being seen as still havi...
by nama
Wed Sep 20, 2017 1:25 pm
Forum: Hardware
Topic: How to mod a US ZX80 to work in New Zealand
Replies: 3
Views: 500

How to mod a US ZX80 to work in New Zealand

So I'm In NZ, and I have two ZX80's, both from the US. Neither seem to work here, but both worked when I lived in Japan. One has a composite video mod.
Is the reason they don't work have anything to do with the fact that NZ is 60hz power and the US is 50hz?

Cheers

Phil
by nama
Sat Sep 16, 2017 10:41 am
Forum: Hardware
Topic: Stop the keyboard ribbon from cracking
Replies: 3
Views: 633

Stop the keyboard ribbon from cracking

My present ZX81's keyboard ribbon cable is actually in pretty good shape, but I've had machines in the past with the dreaded cracked ribbon syndrome. I was wondering if some pre-emptive maintenance, in the form of sellotape (maybe the wide packing tape variety), would be beneficial. By this I mean t...
by nama
Tue Sep 05, 2017 10:43 am
Forum: SALES
Topic: I want to swap ZX80 for Spectrum 128k (Toast rack)
Replies: 2
Views: 653

Re: Want to swap ZX80 for Spectrum 128k (Toast rack)

I have two ZX80's.
I don't need two, so thought I could swap one for a 128k Speccy.

Thanks anyway.

Phil
by nama
Tue Sep 05, 2017 9:38 am
Forum: SALES
Topic: I want to swap ZX80 for Spectrum 128k (Toast rack)
Replies: 2
Views: 653

I want to swap ZX80 for Spectrum 128k (Toast rack)

Fire me an private message if interested.

Cheers
Phil
by nama
Mon Sep 04, 2017 8:32 am
Forum: Hardware
Topic: White screen of death
Replies: 33
Views: 2988

Re: White screen of death

Ok, I spoke a little too soon. After about 20 seconds the pixels started to creep. Adding a capacitor to GND helped fix this (as Pokemon suggested) Fortunately it works well in the issue 3, but unfortunately not in my issue 1 where the characters are still all weird. So It'll stay in the issue 3. IM...
by nama
Sun Sep 03, 2017 11:21 pm
Forum: Hardware
Topic: White screen of death
Replies: 33
Views: 2988

Re: White screen of death

I was just trying out the thought about touching the ROMCS line, unfortunately it didn't seem to work....However while doing this I had another serendipitous moment. The lead going to pin 6 of the 74LS02 dropped off, and the 'K' cursor instantly cleared up. Then I connected this line to GND and agai...
by nama
Sun Sep 03, 2017 9:32 am
Forum: Hardware
Topic: White screen of death
Replies: 33
Views: 2988

Re: White screen of death

I just built up Marks circuit using a 74LS02.
Have a look at this...It's even more dynamic

https://www.youtube.com/watch?v=zg1Gymf ... e=youtu.be

Phil