22 Feb
2008
22 Feb
'08
8:03 a.m.
tiggerlasv at aim.com wrote:
On Feb-21-08 at
16:05:45, Jerome Fine wrote:
If my memory serves me correctly (which is not
very
frequent these days), I seem to remember receiving
a BA23 box with an M8189 in the top slot and the
RLV11 in to next 2 slots. The memory for the system
(normal PDP-11 Qbus memory) was in slot 4.
It's entirely possible that it would work correctly.
Covention has always been that PMI memory immediately precedes
the CPU, and NON-PMI memory immediately follows the CPU. I've always just assumed that there was a reason
for it,
and never really questioned it, since I had no need to.
Necessity is often a reason to try and see if it works.
I'm surprised anyone would bother with an RLV11 in
a BA23,
since the RLV12 was readily available at the time, and supports 22-bit.
Much less space, power, and heat.
And this particular fellow was a tech support, so I am sure that he did
have an RLV12 around - but for some reason used the RLV11.
Although sometimes you just have to work with what is
at-hand. ;-)
YES!!
Sincerely yours,
Jerome Fine
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