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]

Of course, that's not the hardest way. You could also do this:
    http://www.pmonta.com/calculators/hp-35/

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
difficult.