ard at p850ug1.demon.co.uk
Tue Nov 1 19:58:50 CST 2005
> Tony> I have a 2 port repeater somewhere (2 female AUI connectors to
> Tony> link to 2 transceivers), and it's remarkably complciated
> Tony> inside. There's a state machine type of thing with the state
> Tony> table in RAM, and a Z80 + ROM to boot that. Probably about 50
> Tony> chips all told.
> Sounds like a DEREP, which I think is the first Ethernet repeater.
> DEC box, roughly the size of the 3U routers of the time.
No, it's not a DEC product. I forget who did make it (something is saying
'BICC networks') thought. From what I rememebr, it's a 2U case, could be
rackmounted. There's one PCB flat inside, and a little SMPSU box.
> State machine with lots of discrete components sounds about right.
> Z80 to boot it is puzzling, what is there to boot? DEREPs were not
OK, maybe 'boot' is the wrong word. I meant to load the state machine
> manageable, you just turn them on and they would work.
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