> On 2020-06-18, at 17:58, Gerrit Heitsch <gerrit_at_laosinh.s.bawue.de> wrote: > > Never seen any, but the numbers suggest HMOS-I as the process used. True - I keep forgetting that these numbering schemes were valid across more than just "big" chips. > There were also a few 87xx, meaning HMOS-II. > > Here's the list of all that I have seen so far and what they can be replaced with: > > 7707 7406 or 74LS06 > 7708 74LS257 > 7709 74LS258 > 7710 74LS138 > 7711 74LS139 > 7712 74LS08 > 7713 74LS04 > 7714 74LS02 > 7715 74LS373 > 65245 74LS245 (found in VIC-20) > 8708 74LS257 > 8712 74LS08 > 8713 74LS04 Thanks! > As for reliability... They did work, but it seems they don't age well. But that's OK after more than 30 years. Might it be that I mixed something? Like.. RAM chips? I vaguely recall that MOS once made replacements for some otherwise common parts and that didn't go too well in terms of reliability. But can't be sure now if/what those were. -- SD! - https://e4aws.silverdr.com/Received on 2020-06-18 22:00:02
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