25 Jul
2013
25 Jul
'13
10:25 a.m.
From: "Roe Peterson" <roe at liveblockauctions.com>
Sent: Thursday, July 25, 2013 6:40 PM
To: <General at mail.liveblockauctions.com>;
"Discussion at mail.liveblockauctions.com:On-Topic Posts Only"
<cctech at classiccmp.org>
Subject: Re: Pdp11 Ethernet cards
I never heard of any other name, sorry.
On my site you can find the current calculation, it is taken from an 11/34A
user or installation manual. Without checking the info, my guess is
that the 9-slot box with the H777 is already maxed with the 11/34A,
FP11-A and the cache board.
I would use the full-sized box. It has more slots, and you will need a few.
IIRC the PSU for the first 9-slot backplane (the CPU backplane), may
only hold the 11/34A, FP11-A, cache, Operator's console interface and
the DL11-W console interface. So, there will be empty slots.
Not sure you can plug in one MOS memory board. As said, you will have
to calculate the total current to make sure the PSU for the first backplane
is not overloaded.
- Henk
As you say
that your 11/34A has FP and cache (then it is called an
11/34C, IIRC, please correct me if I am wrong)
I've never been really clear
about how the naming thing works.
It makes sense that an 11/34A with cache would be an 11/34C, but
what does one call an 11/34A with floating point and _no_ cache
board? , you will
have to do some math.
The 11/34A with FP and cache is just about what the +5V PSU can handle.
I'd
imagine that depends on the enclosure type. I have two, one is the
9-slot-backplane only (H777 PSU), the other is the full-sized full height
job. I'll have to check into the capabilities of the 5V PSU on both.