11 Dec
2003
11 Dec
'03
1:49 a.m.
The M8190 was salvaged from a PDP-11/23 backplane where it had been
running, so I assumed that it would work in a QBUS setup. Is there an easy
way to tell whether the card is really Unibus or QBUS?
Actually a PDP-11/84 uses a Q-Bus CPU in an adapter of some sort, same with
the memory. My concerns with what I see listed above are if the memory
will
work with the CPU (did it come out of the same system?), I don't have time
to check the part number. The other concern is, since you're wanting to
run
2.11BSD, is the disk controller supported?
M8190-AB
(11/84 cpu)
I separated the '84 CPU because it's oops Unibus and not
Qbus. Everything else you have listed is Qbus. The busses
don't mix. 
11 Dec
11 Dec
1:48 a.m.
On Thu, 11 Dec 2003, Christopher Cureau wrote:
The M8190 was salvaged from a PDP-11/23 backplane
where it had been
running, so I assumed that it would work in a QBUS setup. Is there an easy
way to tell whether the card is really Unibus or QBUS?
8190 is 11/83, Qbus.
as said, an 11/84 *cpu* simply doesn't exist. it was an
11/83 cpu, with a qbus-to-unibus extender.
--f
8:30 a.m.
Christopher Cureau wrote:
The M8190 was salvaged from a PDP-11/23 backplane
where it had been
running, so I assumed that it would work in a QBUS setup. Is there an easy
way to tell whether the card is really Unibus or QBUS?
Jerome Fine replies:
There is a list of DEC boards available. I can't remember the
address. It lists the M8190-AB as Qbus.
2.11BSD, is the disk controller supported?
Probably. MSCP on DEC PDP-11 systems seems
to be supported by most operating systems that run
on a PDP-11. Most 3rd party Qbus disk controllers
and host adapters, especially SCSI host adapters
supported MSCP since their use was targeted to
function under DEC operating systems on the PDP-11
and microVAX II systems.
Sincerely yours,
Jerome Fine
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8:37 a.m.
MSCP controllers and drives should all appear to the OS as DUxx type drives,
so it shouldn't be an issue.
Curt
----- Original Message -----
From: "Jerome H. Fine" <jhfinexgs2(a)compsys.to>
To: "General Discussion: On-Topic and Off-Topic Posts"
<cctalk(a)classiccmp.org>
Sent: Thursday, December 11, 2003 5:30 PM
Subject: Re: Building a PDP-11 for the first time
easy
Christopher
Cureau wrote:
> The M8190 was salvaged from a PDP-11/23 backplane where it had been
> running, so I assumed that it would work in a QBUS setup. Is there an way to tell
whether the card is really Unibus or QBUS?
Jerome Fine replies:
There is a list of DEC boards available. I can't remember the
address. It lists the M8190-AB as Qbus.
2.11BSD, is the disk controller supported?
Probably. MSCP on DEC PDP-11 systems seems
to be supported by most operating systems that run
on a PDP-11. Most 3rd party Qbus disk controllers
and host adapters, especially SCSI host adapters
supported MSCP since their use was targeted to
function under DEC operating systems on the PDP-11
and microVAX II systems.
Sincerely yours,
Jerome Fine
--
If you attempted to send a reply and the original e-mail
address has been discontinued due a high volume of junk
e-mail, then the semi-permanent e-mail address can be
obtained by replacing the four characters preceding the
'at' with the four digits of the current year.
7683
days inactive
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