Sinclair ZX80 / ZX81 / Z88 Forums

Hi everyone,

Just a quick update, I received the mono cable today and it works.

At last I was able to load a game on the zx81!

Thanks again for all your help

Paul

I think the output of the tzxduino is mono. I think that may be the problem. That and getting the wrong connector! Ill should be receiving the mono cable in a few days so ill let you know the result.

The naming of the connectors makes sense now you've explained it!

I'm plugging it into the mic port. Although in desperation I've tried both! I am, however, using a stereo cable. I've ordered a mono one, hopefully this will do the trick.

Ahh, now that you have attached the photo, it’s easy for us to see the problem. The inverse S means syntax error. While the machine detects a syntax error, it will refuse the command or program line. LOAD “” is a shortened version of the command. LOAD requires a string expression. A simple literal ...

That was exactly the problem! Using the "" key instead of shift p twice. So now when I type that the screen goes completely blank. Nothing appears to be loading, the counter on the tzxduino counts down but the screen continues to be blank until I press the space button then it goes back to the comma...

Thanks again for the reply Mark, Yes I did forget to attach the photo! I have now though. All I get is what's on the attached photo, there doesn't appear to be any other signs of anything happening. The tzxduino is supposed to work with spectrums but the spectrums I have are also not working so I am...

I seem to have another problem but I am a complete novice when it comes to the ZX81! To load software, from the research I have done, you attach the audio source (in my case a tzxduino) to the ear connector, press 'j' for the load command and "" then press the 'new line' key and start the tape/audio...

Ahh I see. Bit of a strange development. Just plugged it all back in again and it appears to be all working, picture is fine now! Thanks very much for your help. The computer is heading for a museum so it will be connected to a different TV anyway, an LCD but older than the one I have here. Hopefull...

My meter is reading 10.73v when measuring across the wide tracks directly below the power supply connector

The voltmeter shows 31.8v when set to read ac