slightly OT: NMOS gate identification
keithvz at verizon.net
Mon May 4 11:09:58 CDT 2009
I'm attempting a painful task of extracting logic from an image of a
NMOS die manufactured in 1984. Initially, I'm only going after a small
portion of logic from the chip. I have a block diagram which appears to
roughly match the chip layout, a pinout, and an overall description of
I have very little clue what I'm actually doing, but I'm trying to fix
I'd like to develop a library of images of NMOS logic cells -- and
perhaps using pattern matching later, try to automate the process.
Does anyone here happen to know this stuff well enough to say, "there's
a NOR", "there's an OR", "that's an inverter." etc?
Anyone know the types of books I should be looking at to get this type
of information? NMOS Chip fabrication? Much of what I've found talks
about the actual process, but they normally show side-views of layers.
I'm looking down on the chip through a few layers and need stuff from
I have a couple example shots here
P.S. Yes, I know, I'm crazy.
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