Unusual DEC module: what is this thing?

From: no <oliv555_at_arrl.net>
Date: Mon Dec 15 21:33:00 2003

Tony Duell wrote:
>>Does anyone recognise the following DEC module?
>>
>>HIGH SPEED MOS MEM MAT MS1440 G401C
>
>
> SOunds like one of the special MOS memory boards for the 11/45 series. It
> was faster than using plain Unibus memory (which did work BTW, no matter
> what some DEC mnuals might have you believe).
>
> There was also an even faster (300ns cycle?) bipolar RAM board for the
> 11/45.
>
I seem to recall that the memory content had something to do with
the model designation.

The 11/45 was equipped with standard (non-fastbus) memory (MF11);
the 11/50 came with fastbus MOS (MS11-C),
the 11/55 was the fastbus/bipolar (MS11-B) equipped machine.

At one time we had all three versions at my workplace. Later on we
replaced the /55's bipolar with something called UFUM, a single board
128kw replacement, and at the time, the fastest memory available for
the /45 series.

Able also built a fastbus/MOS replacement called the SCAT



-nick o
Received on Mon Dec 15 2003 - 21:33:00 GMT