[pups] Troubles with 2.9BSD on 11/34a

[pups] Troubles with 2.9BSD on 11/34a

[Christian Corti]

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Hi,

I finally managed to install 2.9BSD on a real 11/34 with two RL01s;
I used KSERVE on RT-11 to transfer a boot disk image created
with E11 to a RL01 disk. I did the same for the /usr partition to be
mounted.
(It was hard to find out that I had to write a little program to convert
the usr.tar file into a tape file for E11 and un-tar it to the disk
image. It didn't work by mounting the tar-file as /dev/rl2 and doing tar
xvf /dev/rrl2; tar would hang immediatly or after the first few files.)

Good news:
I can boot Unix, mount /usr, edit /etc/dtab with vi etc.
Multiuser works too, with my notebook running MS-DOS Kermit in VT100
mode as the console and a real ADM3a attached to a second serial port.

Bad news:
Using the system is a real pain because some (no specific) programs will
cause either a "memory fault - core dumped" or a "bus error - core
dumped". E.g. calling "/lib/cpp" fails, but "/lib/cpp foo" says something
like "foo not found" and terminates without fault.
Very strange too: Sometimes when I start "awk" without parameters (just
for playing around) I get an error like "error on line 6: ..." as if the
shell tried to interpret the binary as a shell script!?
"fsck ..." occasionally fails after stage 5 with a memory fault.
"ps" fails, but "ps axl" works (or vice versa); or both (doesn't) work.
And so on :-(((

But:
There are no errors running RT-11 (it runs just fine) and RSX11/M (as I
could test it). The MAINDEC test programs for CPU and memory give no
errors (perhaps I should let them run much longer?).
There are no errors with these disk images and E11 configured to emulate
the real 11/34.

The configuration:
CPU: PDP11/34a without FPP
memory: 128 kw (one single non-DEC board)
M78?? parity module
Programmer's console
DL11-W for the console terminal
RL11 controller (revised version)
M9812 bootstrap/terminator with DL boot rom

Addresses and vectors are set up correctly.


What is going on? Did anyone have similar problems?
I suspect that either the memory or the MMU has a random behaviour,
but I'm not sure.


Christian

-----------------------------------------
EMail:
Christian.Corti at studserv.uni-stuttgart.de

Universität Stuttgart
Fakultät für Informatik
-----------------------------------------


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Date: Sun, 25 Feb 2001 18:04:47 +0000
To: "Steven M. Schultz" <sms at moe.2bsd.com>
Cc: pups at minnie.cs.adfa.edu.au
From: Robin Birch <robin@ruffnready.co.uk>
Subject: Re: [pups] Stray Interupts
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Dear All,
Having got to the point where I can get ultrix trying to boot on p11 I
can confirm that it complains of stray interrupts on p11 as well.  A
thought occurred to me over the weekend that I haven't had time to try
out.  Is this the toy clock.  It is certainly built into p11, is it
built into Bob Supnik's emulator and if so, does it generate interrupts?

Regards

Robin
In message <200102232059.f1NKxwH11017 at moe.2bsd.com>, Steven M. Schultz
<sms at moe.2bsd.com> writes
>Hi -
>
>> From: Bill Gunshannon <bill at cs.scranton.edu>
>> Maybe the Ultrix source would be a help in better understanding some
>> of the internals of the hardware.
>
>       That could well be the case.  Yes, the simulator is still being
>       worked on and maintained.
>
>> My experience with Ultrix-11 up to this point would lead me to believe
>> that it isn't bugs, but I can easily accept that it is overly picky.
>> 
>> I tried RSTS.  As a matter of fact, I used DSKINT to create my empty
>> RP06 images.  No sogn of a problem there.
>
>       Ah, ok.   That tends to reinforce the thought that Ultrix may be
>       too picky about something.
>
>> I would love to us the Begemot emulator.  I have the latest version but
>> I have been unable to get any of my disk images to work.  Can anyone
>> tell me if you can use the disk images from the other emulators and if
>> so, how??  Do they have to be converted somehow like tapes??
>
>       Yes indeed you can use the RP06 images "bits as is".  As long as
>       the disk image is exactly an RP06 (the only size supported that I
>       can see by P11) nothing more need be done.   In fact that's how I
>       switched over from 'sim_2.x' to 'p11' - I just made a copy of the
>       disk image and hand crafted a p11conf file.
>
>       Tapes need "conversion" because they have to contain information 
>       about record lengths and end of file markers.   Disk images are
>       a simple collection of bytes.
>
>       Steven Schultz
>       sms at moe.2bsd.com
>
>p.s. here's what I use for P11's conf file - perhaps it will be of use.  The
>     disk image "2.11BSD" is referenced on the line 'dev 0 ./2.11BSD  1999'
>
>--------------------p11conf------------------------
>set clock_rate 60
>
>ctrl rk 017777400 0220 5 4000
>end
>
>ctrl rl 017774400 0160 4 4000
>end
>
>ctrl rp 017776700 0254 5 4000
>dev 0 ./2.11BSD  1999
>dev 1 ./junk  1999
>end
>
>ctrl kl
>dev 017777560  060  064 4 tty_net  -7 -t 10000
>dev 017776500 0300 0304 4 tty_net  -7 -t 10001
>end
>
>ctrl mr 017777520 ./rp.boot
>end
>
>ctrl lp 017777514 0200 4
>end
>
>ctrl tm 017772520 0224 5
># dev 0 /tmp/foo
>end
>
>ctrl qna 017774440 5 0x08:0x00:0x2b:0x07:0x82:0x6c 0xf8:0x7a qna.rom
>dev epp_tun tun0 0x08:0x00:0x2b:0x07:0x82:0x6c 0x08:0x00:0x2b:0x07:0x82:0x00
>end
>
># The toy clock.
>#
>ctrl toy 017777526
>end

____________________________________________________________________
Robin Birch     robin at ruffnready.co.uk

M1ASU/2E0ARJ/M5ABD     Old computers and radios always welcome