The comment on TTL was a generalization.
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Also likely any Nmos chips and others will be dead.
That will include most of the parts like the Ram chip, uSD is
plugged in, and as mentioned already most likely all of the ttl.
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There is nothing more than a few diodes and prebiased
transistors that are designed to survive more than 6V on
that board.
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I know this as I had a system I'd built (about 30 years ago)
die when a linear power supply failed (shorted pass transistor)
and went to 9-10V.? Killed all 95 pieces of TTL, ram, four 2901
bit slice, and even eprom.? The replaced supply had crowbar
over voltage protection.
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Allison
