slightly OT: NMOS gate identification

[Lawrence Wilkinson]

Have a look at http://www.flylogic.net/blog/ and, from there,
http://www.flylogic.net/blog/?p=32

(At the risk of restarting the OT thread, note Jeri Ellsworth's
contribution)

LJW

On Mon, 2009-05-04 at 12:09 -0400, Keith wrote:
> 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 
> the logic.
> 
> I have very little clue what I'm actually doing, but I'm trying to fix 
> that. :)
> 
> 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 
> that perspective.
> 
> I have a couple example shots here
> 
> http://www.techtravels.org/snippet.jpg
> http://www.techtravels.org/snippet2.jpg
> 
> Keith
> 
> P.S. Yes, I know, I'm crazy.

-- 
Lawrence Wilkinson                                 lawrence at ljw.me.uk
The IBM 360/30 page                       http://www.ljw.me.uk/ibm360