Hi Ray,
The instructions you’re following start by deposit a set of 11/780 specific
program which will read a tape record into memory:
sim> D 50000 20009FDE
sim> D 50004 D0512001
sim> D 50008 3204A101
sim> D 5000C C113C08F
sim> D 50010 A1D40424
sim> D 50014 008FD00C
sim> D 50018 C1800000
sim> D 5001C 8F320800
sim> D 50020 10A1FE00
sim> D 50024 00C139D0
sim> D 50028 04c1d004
sim> D 5002C 07e15004
sim> D 50030 0000f750
sim> e -m 50000:50031
50000: MOVAL @#20012000,R1
50007: MOVL #1,4(R1)
5000B: CVTWL #13C0,424(R1)
50012: CLRL C(R1)
50015: MOVL #80000000,800(R1)
5001E: CVTWL #FE00,10(R1)
50024: MOVL #39,400(R1)
50029: MOVL 404(R1),R0
5002E: BBC #7,R0,50029
sim>
On the 780 simulator this make sense since the system configuration looks
something like:
VAX 11/780 simulator configuration
VAX 11/780 simulator configuration
CPU idle disabled, model=VAX 11/780
TLB 2 units
SBI
MCTL0 nexus=1, address=20002000
MCTL1 nexus=2, address=20004000
UBA nexus=3, address=20006000, autoconfiguration enabled
MBA0 nexus=8, address=20010000
MBA1 nexus=9, address=20012000
Notice MBA1 (where the tape is connected to the system) has address 20012000.
On the VAX 11/750, the system configuration is:
VAX 11/750 simulator configuration
CPU idle disabled, model=VAX 11/750, bootdev=A
TLB 2 units
CMI
MCTL nexus=0, address=F20000
UBA nexus=8, address=F30000, autoconfiguration enabled
MBA0 nexus=4, address=F28000
MBA1 nexus=5, address=F2A000
Trying to do an OS install (especially a non DEC one) using instructions for a
VAX 11/780 on a VAX 11/750 is pretty much guaranteed not to work. My first
suggestion would be to try and dig up the original instructions for installing
that particular OS on a real VAX 11/750. This may not have even been an OS
that ran on a 11/750. If you can find how to install this OS on real
hardware, then those original instructions will map to a simulator pretty
easily.
Have fun.
- Mark
From: Simh [mailto:[email protected]] On Behalf Of Ray Jewhurst
Sent: Sunday, October 9, 2016 7:40 AM
To: simh <[email protected]>
Subject: [Simh] Older Model VAX simulators, what can you do with them and how
do they work?
Hello everyone,
I have use the VAX 11/780-5 simulator for quite some time now and feel pretty
comfortable with them so I thought I would play around with the other
pre-MicroVAX simulators and have had no luck with them. I tried using the
"recipes: from gunkies.org<http://gunkies.org> to set up some configurations
and nothing works. (I know the 11/730 has some hardware differences, so that
one is the least of my concerns.) Attempting to install 3BSD onto the 11/750
gives me a "0000010 HALT" and with the 8600 I can get all the way to the
initial boot and I get a kernel panic. Now I will admit I haven't tried
different deposits and frankly I don't understand very well how they work but I
would really like to "try" these machines. Also on a similar note I think that
we should either help to revive gunkies.org<http://gunkies.org> or find a new
place to share our system "recipes" and configurations. For example, in the
text file that comes with DOS-11 there are instructions that don't apply to
that version of DOS and I would love to share a revised version of said
instructions.
Thanks,
Ray
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