22 Feb
2022
22 Feb
'22
9:55 a.m.
From: Bill Gunshannon
Just wish I could get some PMI memory for that 93.
?? The KDJ11-E in the -11/93 comes with a minimum of 2MB on the CPU card.
That's enough for almost 16 maximum-sized processes (assuming they aren't
sharing program texts - almost double that, if they are). Does one really
need more than that for vintage retro use?
Besides, the on-board memory operates at full speed (same as cache memory on
the KDJ11-B); even if you added PMI memory, the KDJ11-E has no cache, so it
would be a _lot_ slower than the on-board memory.
Noel
PS: Can people _please_ trim messages they are replying to, so we don't all
have to scroll down past a bunch of irrelevant drek? Thank you.
22 Feb
22 Feb
10:07 a.m.
On 2/22/22 12:55, Noel Chiappa via cctalk wrote:
One can never have too much memory. Especially on these old systems
that had limited memory at best. :-)
bill
From: Bill
Gunshannon
Just wish I could get some PMI memory for that
93.
?? The KDJ11-E in the -11/93 comes with a minimum of 2MB on the CPU card.
That's enough for almost 16 maximum-sized processes (assuming they aren't
sharing program texts - almost double that, if they are). Does one really
need more than that for vintage retro use?
Besides, the on-board memory operates at full speed (same as cache memory on
the KDJ11-B); even if you added PMI memory, the KDJ11-E has no cache, so it
would be a _lot_ slower than the on-board memory.
Noel
PS: Can people _please_ trim messages they are replying to, so we don't all
have to scroll down past a bunch of irrelevant drek? Thank you. 
1:09 p.m.
I always thought that you cannot add (PMI) memory to an 11/93.
There are two versions of the 11/93. One with 2 MB, the other
with 4 MB of memory _on board_. And that?s it.
If you have an 11/93 CPU with 2 MB on board, the board is just
half populated with memory. I don?t think you can add memory
externally. But I might be wrong ?
Henk, PA8PDP
Van: Noel Chiappa via cctalk<mailto:cctalk at classiccmp.org>
Verzonden: dinsdag 22 februari 2022 18:55
Aan: cctalk at classiccmp.org<mailto:cctalk at classiccmp.org>
CC: jnc at mercury.lcs.mit.edu<mailto:jnc at mercury.lcs.mit.edu>
Onderwerp: Re: PMI memory on an -11/93 (Was: Installing an operating system on an 11/83)
From: Bill Gunshannon
Just wish I could get some PMI memory for that 93.
?? The KDJ11-E in the -11/93 comes with a minimum of 2MB on the CPU card.
That's enough for almost 16 maximum-sized processes (assuming they aren't
sharing program texts - almost double that, if they are). Does one really
need more than that for vintage retro use?
Besides, the on-board memory operates at full speed (same as cache memory on
the KDJ11-B); even if you added PMI memory, the KDJ11-E has no cache, so it
would be a _lot_ slower than the on-board memory.
Noel
PS: Can people _please_ trim messages they are replying to, so we don't all
have to scroll down past a bunch of irrelevant drek? Thank you.
1:15 p.m.
On 2/22/22 16:09, Henk Gooijen via cctalk wrote:
I always thought that you cannot add (PMI) memory to
an 11/93.
There are two versions of the 11/93. One with 2 MB, the other
with 4 MB of memory _on board_. And that?s it.
If you have an 11/93 CPU with 2 MB on board, the board is just
half populated with memory. I don?t think you can add memory
externally. But I might be wrong ?
Henk, PA8PDP
I could be wrong, too, but I always thought you could.
bill
1:17 p.m.
On 2/22/22 16:15, Bill Gunshannon via cctalk wrote:
On 2/22/22 16:09, Henk Gooijen via cctalk wrote:
It just hit me. If someone has a 2 meg PMI board they don't want
any more I would be glad to take it and find and let everyone else
know. :-)
bill
I always thought that you cannot add (PMI) memory
to an 11/93.
There are two versions of the 11/93. One with 2 MB, the other
with 4 MB of memory _on board_.?? And that?s it.
If you have an 11/93 CPU with 2 MB on board, the board is just
half populated with memory. I don?t think you can add memory
externally.? But I might be wrong ?
Henk, PA8PDP
I could be wrong, too, but I always thought you could.
2:23 p.m.
On Tue, 22 Feb 2022 at 16:10, Henk Gooijen via cctalk
<cctalk at classiccmp.org> wrote:
half populated with memory. I don?t think you can add
memory
externally. But I might be wrong ?
You are not wrong. From the KDJ11-E module user's guide (on BitSavers)
the solder-side of the CD fingers is left unpopulated, but for the +5
and ground pins.
The only PMI compatible option then would be the KTJ11-B UNIBUS
adapter. (You could probably use an MSV11-Q non-PMI memory to fill out
the last 2MB though.)
Best regards,
Christian
--
Christian M. Gauger-Cosgrove
STCKON08DS0
Contact information available upon request.
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bill.gunshannon＠hotmail.com -
captainkirk359＠gmail.com -
henk.gooijen＠hotmail.com -
jnc＠mercury.lcs.mit.edu