Subject: RE: 4000/200 requirements?
To: None <port-vax@netbsd.org>
From: Carlini, Antonio <Antonio.Carlini@riverstonenet.com>
List: port-vax
Date: 06/06/2001 07:28:38
> NetBSD Bob wrote:
>2. The original boardset had a bus load card (a big board full of
> power dissipation bus loading resistors), a M90xx something.
> Is that really required with a 4000/200 cpu, or is that only
> supposed to be used when the boardset lightly loads the power
> busses? Is it actually functioning as a bus terminator card
> rather than a true bus load card?
It is just a load card. The BA200 series boxes have two PSUs,
one for each half of the Qbus slots. These are (IIRC) switched mode
PSUs and they don't run unless there is a minimum load
present. Usually the processor plus memory is
enough to run the RH PSU and a KDA50 is enough
for the LH PSU.
>3. Where can I run across some of the plastic dual height support
> blanks that hold up the dual height cards?
Usually I found them in BA200 boxes :-) When I did not have one
to hand, I found that the cards stayed in place by themselves
mostly. Maybe I was lucky.
Antonio