Subject: Re: looking inside a mircorvax II
To: bart sikkes <>
From: Ken Wellsch <>
List: port-vax
Date: 10/17/2000 17:42:45
bart sikkes wrote:

> > > Card 5: two cables to the 8 terminal connection outputs (id M3104)
> > This is likely a DHV-11 card, 8 serial ports with silo.  Much better.
> > But I did not see it appear on the kernel probe so it may have an
> > a-typical CSR setting or something.
> What do you mean with this? Can I change some settings to see this in the
> kernel probe?

I took at look at to be sure
and yes, the M3104 is a

M3104       DHV11-A     Q   8-line Asynchronous Multiplexor, with DMA
M3104           Refs: EK-DHV11-TM, EK-DHV11-MC, MP-01783, ZJ362-RZ
M3104           Refs: uNOTE N#041

as I suspected.  It has been years since I last set such jumpers - I recall
one or two dip switches on the board are used to select the CSR address.  I
expect this info must live on the web somewhere with enough folks needing to
know it (not from DEC of course, but from hobby folks like us).

Hopefully some kind soul will pipe up with a URL or pointer to past mailing
list mail on this topic.

I could always either look at a board I have or dig out the manual...


-- Ken