[Simh] VAX 780 & BSD 4.2

[Jason]

I think I left out the critical part that my hybrid tape was to boot with
the regular microvax & try to restore the 4.2 filesystem with the 4.3 stand
...
Sorry about that.

I'm trying to boot a tk50 on tq0.

The best I can get off of the 780 booting is a :

HALT instruction, PC: 00005374 (JSB 494)

... which doesn't mean much.  The 4.2 stand does this:

 2..
-MUA0
 1..0..

HALT instruction, PC: 00004A01 (HALT)


Which means that basically Im going nowhere fast...

To build the tapes Im running it like this:

backwr -Tc 42/tape1-file1 >42.tap
backwr -Tc 42/tape1-file2 >>42.tap
backwr -Tc 42/tape1-file3 >>42.tap
backwr -Tc 42/tape1-file4 >>42.tap
backwr -Tc 42/tape1-file5 >>42.tap
backwr -Tc 42/tape1-file6 >>42.tap
backwr -Tc /dev/null >>42.tap


Sometimes I really take for granted the firmware in 'newer' computers,
although I know the 780's were pretty much built to run VMS..

	-----Original Message-----
	From:	simh at mrynet.com [SMTP:simh at mrynet.com]
	Sent:	Monday, January 30, 2006 7:17 PM
	To:	Jason
	Cc:	simh at trailing-edge.com
	Subject:	Re: [Simh] VAX 780 & BSD 4.2

	How are you booting the stand program to get to the copy phase, and
what
	device are you booting with the image you've assembled?

	-scott

	> I know I'm in way over my head, but I thought Id try to bootstrap
4.2 on the
	> new build of simh (Im trying win32 built with Visual C 2003 & OSX
with gcc
	> 3.3)
	> 
	> >From what I gather the 780 will only boot from the TUK50 tape &
various
	> disks, so the RX console floppy and the TQ TK50 is out of the
question.  So
	> I was thinking of making a 'hybrid' tape with the 4.3 stand
program, and the
	> miniroot & dump/usr from 4.2 .  I am having trouble building the
tapes using
	> backwr, The bootstrap will run, but when it does the 'copy' phase
it seems
	> to read the entire tape & dump out to the entire ra disk...   What
is the
	> best program to make tape files out of files on the filesystem?
(ie stand,
	> miniroot, rootdump, usr.tar) And does the hybrid dump on the
emulated
	> microvax & swap drives to the 780 sound even right?
	> 
	> I'm probably barking up the wrong tree on the whole thing, but
thanks for
	> any help!
	> 
	> If it matters I'm dying to see if the 4.2 in the archive is
'vulnerable' to
	> the Cuckoo's egg cron issue that was in that Clifford Stoll book.
	> 
	> Thanks again!
	> Jason
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