15 Oct
2015
15 Oct
'15
1:57 p.m.
On Thu, Oct 15, 2015 at 10:38 AM, tony duell <ard at p850ug1.demon.co.uk>
wrote:
The documentation for the AMT DAP 600 I have refers to a "midplane," so
named because it's in the center of the machine, with boards plugged into
both sides...
- Josh
"Motherboard" was around then, although Burroughs might not have used it.
Burroughs might very well have been more inclined to call it "backplane".
I generally use the term 'motherboard' for the sort of thing you find in an
IBM5150 or Apple ][ -- that is a board with a lot of electronics on it and
the
edge connectors for daughterboards (I/O cards, etc) whereas I use the term
'backplane' for what I have in a PDP11 or PERQ, etc, just connectors wired
together
(maybe with some simple logic) and almost everything on plug-in boards.
Incidentally, the HP150 has the procrssor and video boards, along with 2
optional
I/O boards going in from the rear of the case and plugging into a PCB of
connectors
(and IIRC a simple printer interface). Due to its position HP call it the
'frontplane'. I have
never seen that term used anywhere else (I assume it's also applicable to
the HP120
but I have never seen any technical info for that machine).
-tony