19 Sep
2010
19 Sep
'10
5:12 a.m.
On 09/19/2010 07:08 AM, Eric Smith wrote:
Rob Jarratt wrote:
It is the Ethernet board and yes the electronics were off the main
board. It was not an option
as MicroVAX2000s were all built with it. It was for repair purposes.
The only variation common
was memory. mostly because memory at the start of production was expensive.
Allison
I recently acquired a couple of MicroVAX 2000s.
One of them has this
board
in it [...] I don't know what this board is
but it connects by two
ribbon cables to
connectors on the main board. Can anyone tell me
what it is?
Since it has the AMD Am7990 (DEC 21-21672-07) "LANCE" Ethernet MAC and
what appears to be an AMD Am7992 Ethernet transceiver (obscured by
rework), it seems likely that it is the optional DESVA Ethernet
interface module (installed as standard on VAXstation 2000). Note
that the presence of an Ethernet connector on the KA410 main logic
board doesn't mean that the machine has Ethernet; they just put the
connector there but the necessary electronics is all on the separate
module.
Eric