Sinclair ZX80 / ZX81 / Z88 Forums

Wow Paul that is exactly what I needed. I hope I can put it to good use. What a great group. Thanks.

It will most likely be powered by an Arduino but will use the 1000 for its content. It might also be cool to just show the ram blinking away in a sphere like its thinking.

I have two clear plastic hemispheres and I want to make a spherical led matrix powered by my 1000 and perhaps use it instead of a monitor. (wont have quite the res) where in memory is the char. set saved and more importantly there must be a place in memory keeping track of what char. is to be displa...

Yes thank you for posting your circuit. Nice little drawing too. Iv'e got it printed in my binder. And will be asking my guru to confirm my own understanding of how it works.

Can you make a proper video circuit? http://www.sinclairzxworld.com/viewtopic.php?f=7&t=2405&p=25270&hilit=1024mak+video#p25270 Thanks a million my friend. I thought my 1000 was a 0000 but that circuit you linked me to gave me a K at the bottom of my screen so I guess its a working computer. I cant...

Yes and hi back to Blittled. I guess we're pretty much neighbors.

Yes I can make that. I made a little progress today. There seems to be 2 labels on the board that say USA before it goes to the modulator One was kind of hiding. So I tried that line out (the one farthest to the left) because the oscilloscope showed a more convincing pattern. When I went from that l...

So Bummer, my 1000 arrived and it is not putting out a video signal ( at least I think.) I didn't have a TV so I bypassed the modulator by soldering to the USA line into the modulator and to the ground. then connected it to a tested composite B&W monitor. I tested the power supply and the little doo...

Hi. Ive always wanted to understand the real 1s and 0 of electrons can be moved around to look smart and I finally found a book that made sense to me. "Programing the Z-80" If you want a really great book about how a cpu, ram and rom is working down to every 1 and 0 you can get the book But How Do ...

Hi. Ive always wanted to understand the real 1s and 0 of electrons can be moved around to look smart and I finally found a book that made sense to me. "Programing the Z-80" So one thing led to another and I ordered a 20 dollar 1000 on Ebay to mess around with. One of the classes I assist in is an el...