[pups] pdp11/73 memory
Johnny Billquist
bqt at update.uu.se
Sat Dec 13 11:56:25 AEST 2003
On Fri, 12 Dec 2003, David Evans wrote:
> On Fri, Dec 12, 2003 at 06:31:12PM +0200, Christos Papachristou wrote:
> >
> > Is it possible to keep some
> > of the MicroVAX memory modules if they are below or equal to 4 megs?
>
> No. The uVAX memory requires special PMI stuff (carried over those
> ribbon cables) that the PDP-11 CPUs don't grok. At least, that's
> what I've always been told.
And that's correct.
The 11/73 require Q-bus memory. The only VAX that used this is the
MicroVAX I.
If the 11/73 really is a disguised 11/83 CPU, you can use the 11/83 PMI
memory, which don't work the same way as the VAX PMI.
(PMI by the way stands for Private Memory Interconnect)
Johnny
Johnny Billquist || "I'm on a bus
|| on a psychedelic trip
email: bqt at update.uu.se || Reading murder books
pdp is alive! || tryin' to stay hip" - B. Idol
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