Reading a masked ROM the hard way (was Re: Wanted: ROM images from HP 9895, 82901/82902, and other HP-IB disk drives)

Eric Smith spacewar at
Mon Sep 21 20:37:48 CDT 2015

Of course, that's not the hardest way. You could also do this:

I have a few chips that I'll need to do that to, where the ROM is
embedded and can't be read out electrically. Unfortunately the chips
are in a much finer geometry than the HP-35 chips, so it's much more

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