Electronics > Repair

Anyone have National Semiconductor "HPC" User's Manual?

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Conventional Wisdom:
Hi folks,

I'd like to help out a friend who needs to modify a 30-year-old system, the controller for which was a custom design based on the National Semiconductor HPC46003 CPU.  The firmware change should be fairly easy, but the original designer is long gone, along with the documentation and source code (of course).

Now, I'm a heck of a reverse engineer (see my HP548xx post), but I need more info on the CPU.  Thanks to Bitsavers I've got the data sheet, lots of app notes, and an old DOS-based assembler and C compiler, and I've even written most of a disassembler for the HPC, but I'm missing a crucial document that's referenced by all the others:

National Semiconductor Publication Number 424410897-001A July 1987
"HPC16083/HPC16043/HPC16003 User’s Manual."

It used to be available on National's "Dial-a-Helper" BBS (remember those?) but I've searched everywhere on the web and can't find it.  I even emailed Texas Instruments support, since they acquired all those NS CPUs, but they don't have it either.   The User's Manual apparently has a lot more information about the peripherals and instruction set that isn't in the data sheet.

My only hope is that someone will remember that they have a copy of it that's been collecting dust and cobwebs in a box in the attic since 1989.
 
I really don't want to have to replace the controller entirely.  Can anyone point me to this manual?  Thanks for reading!

Conventional Wisdom:
Bump.  Still interested.  Thanks!

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