Can someone please explain to me in technical terms how the Hi-Res on a ZX81 work? I have tried modifying a homemade pack I build using a 7400 and 62256 from a design by Grant Searle to no avail.
Please see my post:
https://sinclairzxworld.com/viewtopic.p ... 1&start=20
The thread had gone stale so I'm not getting any replies.
Hi-Res once and for all, PLEASE
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Hi-Res once and for all, PLEASE
ZX80/ZX81/ZX Spectrum