@DGR (apologies for off the wall direction).
It's a diversion, while we wait for the world to end ...
I was talking to a Russian engineer many years ago about the Sinclair Z80 and bemoaning the fact that because they used such a cheap connector, by the time you had spent 20 minutes 'programming' it, if you then knocked it AT ALL, it would reset blank.
Z X 80 ? Don't recall that having too many problems (mind you, it only had 1K memory
)
Now the ZX81 on the other hand, with it's infamous 16K Rampack ... although almost every edition of "Your Sinclair" (a magazine the British Library were horrified to realise they had never had a copy of, despite the law ....) had what we would nowdays call "a hack". Blu tack usually ...
he commented that he had no trouble with the Russian version as they used a better connector, having 'copied' all the rest of it.
Well, yes, all very amusing. However, just to fight Uncle Clives corner, if the ZX81 had been a penny more, it's less likely it would have made the UK the world leader in desktop/personal computing. Although looking back, I'm sure he wonders why he bothered, as we managed to piss that away even quicker than North Sea Oil. And for all the Russian smugness, it's worth noting we never saw the Lada/Polski equivalent of the ZX80/81/Spectrum/QL/OPD ... bearing in mind the US tech embargo of the cold war.
I used to be able to write Z80 assembler in hex direct, what went wrong in my life
.