at&t unix pc

Dave McGuire mcguire at
Mon Oct 11 22:26:22 CDT 2010

On 10/11/10 10:48 PM, Mark Davidson wrote:
> Ok, I pulled out my 'black binder'.  It's a copy of the AT&T Unix PC
> Reference Manual, and is for technicians doing component-level
> troubleshooting of the AT&T Unix PC logic board.  It's pretty thick
> and contains sections on:
> * System Features and Functions
> * Logic Board Theory of Operation
> * Diagnostics
> * Logic Board Test Procedures
> * Schematics
> * PAL Equations
> * Mnemonics
> * Expansion Memory Locations
> As I said, it's pretty thick... has this been preserved in digital
> form somewhere?

   Not that I'm aware of.  Oh, how I'd love to have a PDF of that!  I 
saw that manual ~22 years ago but didn't have access to a beefy photocopier.


Dave McGuire
Port Charlotte, FL

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