Search found 999 matches

by Paul
Wed Apr 03, 2019 9:35 am
Forum: SALES
Topic: ZX81 heat sinks
Replies: 6
Views: 354

Re: ZX81 heat sinks

A good question indeed. I did notice someone on the Jupiter Ace rebuild thread using a Speccy heatsink so maybe for projects like that or other homebrew? To be honest I don’t want to just recycle them - it seems such a waste. E-Mail sent ;) they are going to find a second life in Jupiter's after mo...
by Paul
Mon Apr 01, 2019 7:20 pm
Forum: Hardware
Topic: TS1500 50Hz which resistor
Replies: 6
Views: 261

Re: TS1500 50Hz which resistor

Inside the "Modulator" case there is a diode in the left front corner. The left pin of which is either 5V or 0V depending on channel selection. I guess I don't need 60hz. Maybe I make an internal ROM with bigbang and sponzy. Black and white spectrum in a TS1500 case - crazy enough to get it done. :m...
by Paul
Mon Apr 01, 2019 6:23 am
Forum: Hardware
Topic: TS1500 50Hz which resistor
Replies: 6
Views: 261

Re: TS1500 50Hz which resistor

Hi Andy, I guess it would be possible internally as well?
Which bytes have to be changed?
Do you know how the channel 2/3 selection works? Maybe this could be (ab)used for ROM switching?
Kind regards Paul
by Paul
Sun Mar 31, 2019 9:57 pm
Forum: Hardware
Topic: TS1500 50Hz which resistor
Replies: 6
Views: 261

TS1500 50Hz which resistor

Hello, after years of owning a TS1500 and not daring to open it because it's in perfect condition I was able to buy a broken TS1500 in near mint condition. This had to be opened in order to be repaired. I was lucky, it was just a broken Z80 that was socketed and a brittle membrane. I made a composit...
by Paul
Fri Mar 29, 2019 5:06 pm
Forum: Sinclair Misc
Topic: Jupiter ACE (again)
Replies: 81
Views: 9497

Re: Jupiter ACE (again)

I'm on my way to Mahlerts. There is our annual ZX-TEAM meeting this weekend. As soon as I have setup my table I will take a photo and post it here. In case there would really be no color software, let's write some!
by Paul
Fri Mar 29, 2019 11:31 am
Forum: Sinclair Misc
Topic: Jupiter ACE (again)
Replies: 81
Views: 9497

Re: Jupiter ACE (again)

Mine look quite similar. Thanks a lot for your help. Mine also has an acrylic case.
What is still missing is the Jupiter color card and the Jupiter SD interface ;)
Kind regards Paul
by Paul
Wed Mar 27, 2019 1:00 pm
Forum: Hardware
Topic: Low output from voltage regulator
Replies: 7
Views: 261

Re: Low output from voltage regulator

Welcome to our forums nugat.
How much current is it taking?
Kind regards Paul
by Paul
Tue Mar 19, 2019 11:44 pm
Forum: Hardware
Topic: Keyboard Issues .. Some keys not working (new membrane)
Replies: 11
Views: 337

Re: Keyboard Issues .. Some keys not working (new membrane)

Hi, would you please be so kind and tell us to which computer you added a new ula and membrane? ZX81, SPECTRUM etc and in case of spectrum which type and Mainboard issue.
Kind regards Paul
by Paul
Thu Mar 14, 2019 5:54 am
Forum: Welcome Area
Topic: My ancient Zeddy!
Replies: 19
Views: 890

Re: My ancient Zeddy!

Very nice. I like steam punk. :ugeek:
by Paul
Tue Feb 26, 2019 8:48 pm
Forum: Hardware
Topic: ZX81 External Keyboard
Replies: 37
Views: 3879

Re: ZX81 External Keyboard

Sure, no problem. It's compatible.