Sinclair ZX80 / ZX81 / Z88 Forums

I bought a pre assembled version and its nice and well made. I found some graphical glitches when using it in ZX80 8k rom mode, but seems fine in 4k rom mode. Not sure what the issue is, but every other keypress makes the character that the curser sits on look corrupt? Anyway, made a tidy perspex ca...

I cannot believe I've spent most of this easter weekend playing this game! I can remember being aound 5 or 6yrs old and my elder brother's playing this and grabbing hold of each other as the scores came in haha. This weekend I introduced my children to the game who were not too impressed with a 32-3...

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Hi PokeMon, really lovely kit! I recieved mine on Friday and nearly finished building her (been a busy weekend) but Just wanted to check that I do still need to do the mods on R4 and the resistor added to pin 1? Reason I ask as these are detailed in an older 2013 version of your manual but not in th...

Yes I'm sure you had to add some resistors to halt the NMI so it would work otherwise it would crash. I just cant remember where I read it? To be honest though, I know absoloutly nothing about eproms etc. I'm more of a buy it and solder it in kinda guy. I could find the files, but wouldnt have a clu...

I read somewhere, not sure where but I read that its possible to convert a ZX81 into a ZX80? I guess a 4k rom would be needed. Is this possible and if so how? Also is a copy of the 4k rom available for sale anywhere?

Actually that did answer my question. I do get reasonable results with input b$ then just entering newline to continue with my program. I like how this operates and should suffice for my little game

Hiya, How can I slow down the zx80 so I can see it count? 10 for a=1 to 1000 20 print a 30 cls 40 next a I'm planning a little basic game based on dice rolls and would like a pause between moves so screen text can be read. is this possible? I also like the idea of zx81's pause statment that can be p...

Do they actually exist? I mean, has anybody ever seen one? Sorry I got peeps hopes up lol. Just a miss click

Sorry meant issue 3 with the red motherboard