10 Apr
1998
10 Apr
'98
4:37 p.m.
HA! Mention a vauge memory on the list and _someone_ out there
is bound to know the exact part you're refering to. My typos
notwithstanding, does anyone know if old BSD-2.x varients,
which ran on the PDP-11, supported this board? Was TCP/IP
supported along with DECNet?
I find it tough to believe that a BSD kernel with networking
fit into the 64K memory segments of the PDP11... The copy of
Venix I ran on my 11/23 didn't support networking and the
kernel most _definately_ fit into only one segment.
--jmg
From: Jack Peacock <peacock(a)simconv.com>
Subject: RE: You've got to be pulling my chain... (Ethernet)
I seem to remember early Ethernet
interface VAX quad cards
being around 1.5Mbps... not sure if it was think ether, vampire
tap stuff... This would have been before ethernet was turned
into a 'standard.' One guy I know has one of these hanging
That is a DMC-11. It was an early networking card before Ethernet. It
was point to point, 4 wire coax, synchronous serial at something around
1.5Mbps. The DMC-11 had an onboard bit slice processor (might have been
a Signetics 8X305, not sure) to handle the packet assembly/disassembly.
BTW the KMC-11 was a generic DMC-11 that was user programmable, if you
wanted to roll your own protocols. I used a pair of DMC-11s in 1977 to
network two PDP-11/34s with an early version of DECnet. I don't recall
that DEC had any multi-drop type network interface at that time, except
maybe for X.25 PADs.