You've got to be pulling my chain... (Ethernet)

From: J. Maynard Gelinas <maynard_at_jmg.com>
Date: Fri Apr 10 15:37:11 1998

       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_at_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.
>
Received on Fri Apr 10 1998 - 15:37:11 BST