Sinclair ZX80 / ZX81 / Z88 Forums

I tried the Memopak 16K initially, and initially BASIC said I had 1k, which is erm not good. Checked the connector with a meter and things were not connected, it was shifted over a bit so fixed that... then it said correctly 16k. Put in the ZXPand+ again and it also said 16k. Decided to then check e...

Wow that edge connector was dirty! But cleaning it didn't seem to help. :/ I'm going to try the normal 16k rampac I have and see if I can load a program into it. Then maybe I have some idea if it's related to the ZXPand+ or not. I guess there isn't a useful ZX81 utility program that checks RAM for e...

Thank you both very much for your suggestions! I've not cleaned the edge connector so I'll try that first as I'm pretty sure the card is genuine. Also thank you for the nice welcome, I feel like I'm rediscovering the ZX81, it was my first computer all those years ago and where I first learnt some Z8...

Hi all! Hoping someone can help me with an issue to do with my ZXPand+. I got it nearly two years ago but it's taken me this long to get my act together and fit a composite mod to my ZX81. As far as I can tell, the ZX81 works ok, I haven't tried to load anything into it but commands work. However, w...