Yah, the ZX80 couldn't think and talk at the same time so it blanked the screen while it was processing! In the ZX81 this was known as FAST mode, with the slower SLOW mode being able to do both. However, this still meant that in SLOW mode the machine was 4 times slower than in FAST! Probably sometime tonight I'll upload the Your Computer reviews of the ZX81, Jupiter Ace and a couple of others for your reading pleasure, unless you've already got them round somewhere. Oh, hang on, you're text only aren't you? <thinks>. Yep. Looking at the pic on the museum site the keyboard is part of the main PCB, whereas on the ZX81 it was separate. I still think its funny to look at the design for the ZX80 and compare it with the heath-robinson nature of the Issue 1 Spectrum :o) Bugger :) I think I need to get my paws on that then...... -- Adrian Graham MCSE/ASE/MCP C CAT Limited Gubbins: http://www.ccat.co.uk (work) <http://www.snakebiteandblack.co.uk> (home) <http://www.binarydinosaurs.co.uk> (The Online Computer Museum) 0/0