Sinclair ZX80 / ZX81 / Z88 Forums

If you get it running and there would be space left you might be able to add the functionality of the clockdoubler that is quite popular.
I hope so much that you succeed .

Thanks for this execelent work! I love it. About the cheap programmers on ebay I can say that I have a TOP2009 with windows software that works very well. It is very cheap and programs GALs up to 22V10 and Eprom TMS 2564 as well which is pincompatible to the original Sinclair ROM and an ideal replac...

jegs2 wrote:May have missed it, but does the device enable high-definition graphics?

Also, hopefully the internal 16K of my T/S 1500 won't pose a problem.

No HD-Graphics, sorry.
Only HiRes Graphics are supported
Its not 1920 × 1080, only 256*192.

Thoughts, anyone?? Well, there might by demand for a feature allowing to save the running program to mmc and, on reloading, to continue at this point. That would give Games a possibilitie to be continued after a pause (or if I always fail at some point ;) ) Specially if a program was loaded from ta...

The image is now working. But we have to wait for someone Else to Interpret this. I have Not Seen this before, except when the tv is Not tuned in perfectly. You Might try to Manualy fine tune the tv. Modern tv Sets have difficulties with Tuning in. Is the Channel you tuned in near where it is suppos...

Please don't Open the computer! As the Keyboard still Shows Response in any Way it seems to work. The keyboard is connected to the pcb with two Plastik ribbons that are very likely to Break After 30 Years if the Case is opened. As you have a RAM Pack it would Be very interesting if the behaviour is ...

Welcome on Board. You seem to have taken the First step. Something Appears on your screen. Next Thing we Need is a Bit more of information. Is the Pattern you get Quite Stable? Is it fine Lines or rather Big squares (Size of a Charakter) you Might Even Append a Small Photo. Do you have the Minimum K...

Before you Change your Gal, try to put the out Command As First Instruction.
Or the resistors can Be added to your zxpand so no Rom Ganges for this is needed.
Paul

I can't answer this one - I sent a ZX80 motherboard and what was left of an original keyboard to the company who took the measurements from it. Hi Rich, if we are having an extra pcb for the membrane, could you think of having the ZX80 membrane produced with the ZX81 writing on it? Maybe not shiny ...

As regards cases - the board is sized to fit snugly inside a Memopak 16K case. Glad to hear this. Fortunately I got a spare memotech case :mrgreen: That means you need to have the "long" connector and the little pcb at the other side where further attachments are mounted on. Is there a source for t...