Hello everyone.
I am new to this forum and this is my first post, I have owned and still got a ZX80 since it was introduced back in the 80s, I upgraded the Rom to ZX81 and installed an interface card to give slow mode, then it lay in a box for the next 30 or so years, I have recently converted it my ZX80 back to original by removing all mods, the question I have is related to the slow mode interface, I want to keep the interface card but it’s not complete having lost an IC, I was wondering if anyone has any info on this card as any info I had has long since disappeared, it would be nice to restore the card as a part of ZX80 history.
Any info would be much appreciated.
ZX80 Slow mode mod
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ZX80 Slow mode mod
Last edited by retro_ready on Thu Dec 05, 2019 10:12 pm, edited 1 time in total.
Re: ZX80 Slow mode mod
My guess would be another 74LS93
It is only a guess. To be sure some reverse engineering could help.
Regards Andy
It is only a guess. To be sure some reverse engineering could help.
Regards Andy
what's that Smell.... smells like fresh flux and solder fumes...