25 Jan
2012
25 Jan
'12
11:43 a.m.
On Jan 25, 2012, at 2:08 PM, Holm Tiffe <holm at freibergnet.de> wrote:
Glen Slick wrote:
The PDP-11 PMI bus uses the C-D interconnect, but the MicroVAX-II and -III use a ribbon
cable across the tops of the boards. (and I think they use some lines on the C-D
interconnect too) These three PMI buses are completely different and are NOT compatible
in any way.
-Dave
--
Dave McGuire
New Kensington, PA
On Jan 25, 2012 8:31 AM, "Holm Tiffe"
<holm at freibergnet.de> wrote:
Yes it is an M7554, like the one of this guy:
http://home.windstream.net/engdahl/pdp-11_53.htm
It doesn't have the 50 PIN Ribbon Cable connector on the front like the VAX
RAMs, but I Think I've read somwhere that C and D Slots are building a PMI
BUS... ???
Yes, know this. But what's the right PMI for the KDJ11?
I have soldered an additional Megabyte to the KDJ11 and it has now 1,5MB,
which is enough tu run 2.11BSD, therefore I don't have tried to use one of
the memory Boards additionally until now.
If it has on board memory that sounds like an M7554, which I don't think
does PMI memory. I think that is only the M8190 which would use M8637
MSV11-J for PMI memory.