Old stuff

From: Roger Merchberger <zmerch_at_northernway.net>
Date: Sat Nov 8 23:41:38 1997

At 08:20 PM 11/7/97 -0800, Kip Crosby wrote:
>At 03:34 11/8/97 GMT, you wrote:
>>....in my experience
>>with IBM network cards, if they're a round (i.e. BNC) connector,
>>they're probably the old "baseband" stuff that uses lots of coax cable
>>and a hub/amplifier, and work only with IBM PC-LAN Program and
>>NetBEUI....the number 2Mb/sec comes to mind....
>Are we talking about Arcnet here? When I think 2Mb/sec, BNC connector, and
>8-bit bus, I think Arcnet, but there may have been others....

Several makers made Arcnet cards, including ... looking... Thomas-Conrad,
who made both 8-bit and 16-bit 1/2 and full length cards... My employer
gave me 40+ cards and a 16-port active hub... unforch 30 or so cards give
their lives admirably to my CoCo hacking habits (needed the DIP switches,
DIP sockets, 74LS series chips, etc...) but I did save 10 or so cards, and
plan on setting up an Arcnet network sometime during the winter.

This is what I remember: max. 255 nodes per network, 2.5 Mbit speed (which
is gangbusters over 19.2Kbit RS-232 which is what I have now) and the max.
distance between active hubs you could run was nearly a kilometer, IIRC.

BTW, I seem to recall (but this may not be correct) that 2Mbit speed with
DB-9 connectors were Lantastic cards -- they were a built-in computer with
a Z-80, RAM buffer, Z-80 support chips and an optional boot ROM I think.

Anywho, hope this helps!
Roger "Merch" Merchberger
Roger Merchberger       | If at first you don't succeed,
Programmer, NorthernWay | nuclear warhead disarmament should *not*
zmerch_at_northernway.net  | be your first career choice.
Received on Sat Nov 08 1997 - 23:41:38 GMT

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