2 Feb
2001
2 Feb
'01
9:54 a.m.
I have an interesting question. Can this board be used
as additional
ram
in a PDP-11? If so, how might it be done?
I have a Qbus Memory board that must be from a uVAX II - M7609-AP
with 288 (I hope I counted correctly) memory chips
4256L-15 8726255 A 21-22422-42 R with the
a standard male 50 pin header at the top to be connected to a uVAX
CPU.
If my arithmetic is normal, does this make it an 8
MByte memory?
It's a microvax memory most likely. PDP-11 can address a maximum of
4mb.
But, is there any way that a regular PDP-11/73 could
see this memory
and use it in some manner?
No, it's not compatable.
I don't expect that anyone will want it, but if so,
can I swap it for a
regular
PDP-11 Qbus memory of 4 MBytes?
That should be possible but I think the largest common memory board
for PDP-11 Q-bus is 1MB.
Allison
2 Feb
2 Feb
1:09 p.m.
ajp166 wrote:
I have an
interesting question. Can this board be used as additional ram
in a PDP-11? If so, how might it be done?
I have a Qbus Memory board that must be from a uVAX II - M7609-AP
with 288 (I hope I counted correctly) memory chips
4256L-15 8726255 A 21-22422-42 R with the
a standard male 50 pin header at the top to be connected to a uVAX CPU.
If my arithmetic is normal, does this make it an 8 MByte memory?
It's a
microvax memory most likely. PDP-11 can address a maximum of
4mb. But, is there
any way that a regular PDP-11/73 could see this memory
and use it in some manner?
No, it's not compatable. I don't
expect that anyone will want it, but if so, can I swap it for a regular
PDP-11 Qbus memory of 4 MBytes?
That should be possible but I think the largest
common memory board
for PDP-11 Q-bus is 1MB.
8677
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8677
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