24 Feb
2003
24 Feb
'03
4:50 a.m.
--- Marvin Johnston <marvin(a)rain.org> wrote:
Hi Sellam,
Just curious, what model PDP-8 do you have? I picked up some flip-chip
modules (M series) and if you need any of that type, what are the card
numbers you need? It looks like most of these were used on the PDP-8I/L.
The R-series are for the Straight-8 and the -8/S, as well as some
of the peripherals of the day (PT08, DF32, etc.) S-series are, IIRC,
performance-selected R-series modules (same PCB, qualified semiconductors).
There were also B-series (blue-handled), W-series (white-handled) and
a few others in common use during the mid-1960s.
As for the M-series, you are correct - they were the primary
constituents of the PDP-8/L and -8/i, as well as a few other
devices of the late 1960s. By the early 1970s, individual M-series
modules with specialized components (DEC bus drivers/receivers)
were common as parts of Unibus peripherals. The CPUs had moved
to Quad-height cards (OMNIBUS and Unibus).
I'm always on the lookout for M-series modules to keep my PDP-8/L,
PDP-8/i and RK-11C working. Respond to me offline with what handle
numbers you have and let's talk.
-ethan