On Thu, Oct 15, 2015 at 10:38 AM, tony duell <a...@p850ug1.demon.co.uk> wrote:
> > "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). > 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 > > -tony >
