[vcf-midatlantic] PEP Modular Computer

Dave McGuire mcguire at neurotica.com
Tue Feb 9 07:30:15 UTC 2021

On 2/6/21 5:52 PM, Neil Cherry wrote:
> Somewhere around here I think I have a prototype board but I have no 
> idea where it is.
> I pulled some of the card and it has a 8Mhz 68K with 16K of RAM. I am 
> looking for the
> manuals but I have doubts on that. It definitely has 1M of ram. The 
> CIM-2 has 2 6850's
> and 2 6821 (header is there but no cable). The 2 hard drives in it are 
> ST506 interface.
> There are 2 backplanes, one is triple row (male on the card, female on 
> the backplane).
> The other is 2 row (male on the card, female on the backplane) and 
> connected to the
> triple via an I/O board. I can't recall if one is a VME bus, or Euro Bus 
> or STE Bus.
> I definitely want this up and running as it's a good example of an 
> industrial micro-
> computer before the IBM PC became popular. I know it runs OS9 as that's 
> what I had
> on it and the ROMs also say so. :-) Microware's OS-9 for the 68K became 
> OSK which
> later became OSK. Microware OS-9 still exists and supports a large 
> number of
> processors including the one for the Raspberry Pi.

   Yup, definitely very interesting hardware.  I'll have to keep my eyes 
open for that stuff.

   I have no experience with OS-9, but have taken an interest in it over 
the past few months.  I'm slowly putting together a 6809-based system to 
run it on.


Dave McGuire, AK4HZ
New Kensington, PA

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