Search found 2243 matches

by Moggy
Fri Feb 26, 2021 2:26 pm
Forum: Welcome Area
Topic: Hi from Chile, South America
Replies: 1
Views: 83

Re: Hi from Chile, South America

Hello and welcome to our forum sl07h1. :D It's always nice to see new faces from around the world and also nice to know this small computer possibly helped you choose your career. The folk here are nice and friendly and will help with any questions you may have and please do read the many threads on...
by Moggy
Wed Feb 24, 2021 10:26 pm
Forum: GAMES
Topic: 1K Real Chess for ZX80 and ZX81 cassette kickstarter!
Replies: 8
Views: 374

Re: 1K Real Chess for ZX80 and ZX81 cassette kickstarter!

Thanks for the explanation about the ZX80 video routine,this makes sense now. :D

I have found that if I do the opening moves for the opponent and then let it play for itself a good game can be played plus it's nice to have something for the ZX80 to do.
by Moggy
Wed Feb 24, 2021 12:32 pm
Forum: GAMES
Topic: 1K Real Chess for ZX80 and ZX81 cassette kickstarter!
Replies: 8
Views: 374

Re: 1K Real Chess for ZX80 and ZX81 cassette kickstarter!

Both the ZX80 and 81 have had a full FIDE 1k chess for about five years now. I did a lot of play testing for Stefano of both versions and whilst the ZX81 version is quite excellent in my opinion, the ZX80 version is problematic from a gameplay point of view which I find surprising as I believe they ...
by Moggy
Mon Feb 22, 2021 8:53 pm
Forum: Hardware
Topic: New to repairing ZX's
Replies: 23
Views: 825

Re: New to repairing ZX's

And you're not leaving until it's fixed!!! :lol:

(Or until Lardo sells you one of his Chinese zeddy knock offs)


Moggy hides fearing lardo's wrath
by Moggy
Mon Feb 22, 2021 4:52 pm
Forum: Hardware
Topic: New to repairing ZX's
Replies: 23
Views: 825

Re: New to repairing ZX's

As I said earlier I'm not the smartest here but I have seen similar patterns when the onboard RAM chip(s) were shot. The only way I could test was by using a RAM pack, which cuts out the onboard memory, as for for scoping and probing tests then hopefully a forum guru who knows their way around such ...
by Moggy
Sun Feb 21, 2021 7:16 pm
Forum: Hardware
Topic: New to repairing ZX's
Replies: 23
Views: 825

Re: New to repairing ZX's

Top picture wrong, bottom picture correct re ROM position.

I cannot help further than that I'm afraid as I don't have the Latin for things technical. :oops:
by Moggy
Tue Feb 16, 2021 10:48 pm
Forum: Hardware
Topic: EPROM for 4K ZX80 ROM?
Replies: 17
Views: 633

Re: EPROM for 4K ZX80 ROM?

The programmer bursts in fractions of a second if memory serves and there is no way you could keep up with that manually I assume.
by Moggy
Tue Feb 16, 2021 8:49 pm
Forum: Hardware
Topic: An upgrade too far?
Replies: 18
Views: 728

Re: An upgrade too far?

That's great news Trevor got there in the end. :D
by Moggy
Tue Feb 16, 2021 4:34 pm
Forum: Hardware
Topic: EPROM for 4K ZX80 ROM?
Replies: 17
Views: 633

Re: EPROM for 4K ZX80 ROM?

Most excellent! :ugeek:
by Moggy
Mon Feb 15, 2021 2:49 pm
Forum: Hardware
Topic: EPROM for 4K ZX80 ROM?
Replies: 17
Views: 633

Re: EPROM for 4K ZX80 ROM?

Further to the above if you do use an external supply then some method must be used to obtain either 21 or 25 volts. The three batteries put out 27v and in my programmers case a small onboard dropper circuit ( zener diode and resisters I think ) is used for required voltages.