26 Feb
2003
26 Feb
'03
5:57 p.m.
----- Original Message -----
From: "Johnny Billquist" <bqt(a)update.uu.se>
To: "Christos Papachristou" <chpap(a)ics.forth.gr>
Cc: <pups(a)minnie.tuhs.org>
Sent: Wednesday, February 26, 2003 3:04 PM
Subject: Re: [pups] (no subject)
I don't know ,it just says mem=158720
No. It wasn't a problem in speed, the default configuration for getty
was
wrong (it was
configured for LA36 printer output). This is the first time I use a UNIX
that was meant for dialups with 110-9600 modems or terminals so please
excuse me. But I am learning... By the way
the console runs at 38.4kbps , but the gettys are internaly configured at
other speeds ,
the highest being 9.6kbps. Can't I use the full speed of the port?
while
support.
On Wed, 26 Feb 2003, Christos Papachristou wrote:
> A few questions from a newbie:
> I have installed 2.9BSD on a microPDP11/73 with an RD52, using the MSCP
> version of Jonathan Engdahl. After startup the kernel
> indicates 160kb of memory .I am not familiar with such an old unix to
> find out the details but I understand it as 256k minus the kernel. The
memory
is M8067-LF
i.e. 512k Qbus. Does this mean that the system can't see the
rest of it and that I have configure/recompile the kernel?
The system seems anyway to run fine.
Are you sure it's reporting bytes, and not words? I haven't seen an operational PDP with UNIX
before this,
so I can't judge its speed. When in single user mode it seems to
me that it runs "fast". However upon entering multi user mode the speed
drops dramaticaly. I have not yet compiled in the 8 port multiplexer
(DHV11-A), so only the console is functional and thus no gettys are
loaded. So ,why is there such a change in speed? Does the multiuser mode
just rise the nice value of the console tasks?
There shouldn't be a big difference in speed. Are you starting some heavy
demons? > Some information on the system. It is a KDJ11-B
(M8190 -no suffix) i.e.
an
> 11/84. So, the label on the system says
microPDP11/73 (in an BA23
enclosure)
> the cpu is an 11/84 (if the FPU socket is the
DIP-40 slot then it is
> unused), and the 2.11BSD second stage boot (version from vtserver) I
> have tried indicates 11/83. The memory is after the CPU and is Qbus
(M867-LF).
> If I have understood what I have read in the
list, this must be a mixed
> system that could use PMI memory, but just uses Qbus?? What exactly is
my
system?
There exists a specific 11/73 CPU card, but we'll ignore that for now.
The 11/73, 11/83 and 11/84 all use the same CPU card.
The differences are in other areas, and cannot always easily be detected
by software.
The difference between an 11/73 and 11/83 is if the system have Qbus
memory or PMI memory. The difference between an 11/83 and 11/84 is if the
system have the KT84 (or whatever the card is called, my memory fails me
at the moment) Unibus map, which is a Q-bus to Unibus converter along with
the Unibus map required. The CPU is always on a Qbus, but in the 11/84,
nothing but CPU and PMI memory is on this bus.
> Moreover the MSCP controller (M8639 YP i.e. RQDX1)
> the serial port multiplexer(M3104 i.e. DHV11-A) and the memory are Qbus > the cpu board is indicated as Unibus in the field
guide. Can these two
bus type
> s be mixed? (If yes , i would be tempted to abuse
the dead VAX11/780 in
the
basement. Can
this be done?).
No.
As stated above, the CPU card is actually always Qbus. In the 11/84 you
have a bus adapter to connect the Unibus.
> Anyway, I thought that the best choice of
> a UNIX for it since it only has an RD52 woulbe 2.9 BSD with MSCP Was this a
good guess?
Yes, since you probably don't want to pay a lot of money to Mentec for one
of their OSes. 2.11 is much nicer, but you'll want more memory and disk
space for that.
Johnny
Johnny Billquist || "I'm on a bus
|| on a psychedelic trip
email: bqt(a)update.uu.se || Reading murder books
pdp is alive! || tryin' to stay hip" - B. Idol