24 Apr
2015
24 Apr
'15
12:20 p.m.
On 04/24/2015 03:01 AM, Eric Smith wrote:
On Thu, Apr 23, 2015 at 8:51 PM, Jon Elson <elson
at pico-systems.com> wrote:
Yes, but many multibus systems did not use the P2 connector
as a BUS, but as a way to bring
serial and parallel I/O out from specific slots. There were
some later systems like SGI IRIS
that used the P2 as a bus to extend the datapath to 32
bits. But, for generic multibus, you can do a lot of
testing without the P2 extender.
Jon
Multibus extender boards.
Not Multibus.
Multibus P1 is 43x2,at 156 mil pitch, like the larger
board shown, but P2 is 30x2 at 100 mil pitch, while the smaller board
shown is 24x2 at 156 mil pitch.
An extender made for Multibus normally includes both as one board,
with two card edges and two receptacles, though it is possible to use
two separate extenders, or just the 43x2 if the board doesn't need P2,
for instance, if it doesn't have more than 20 address lines.