I've gotten the root system to install and boot.  I shamelessly stole
the filesystem sizes and interleave numbers from the docs, without
trying to adjust them for the disk image I actually created.  I
haven't tried creating /usr and /sys yet.

I'm attaching a perl script for creating a bootable install tape
image, a simh initialization file, and my install log.

Andru
$ dd if=/dev/zero of=system.dsk bs=1024k count=10
$ ./v7m.mkdisttap.pl > v7m.tap
$ pdp11 v7m.simh

PDP-11 simulator V3.7-0
Boot
: ht(0,3)
file sys size: 9600
interleave factor: 6
blocks per cylinder: 20
file system: rl(0,0)
isize = 3072
m/n = 6 20
Exit called
Boot
: ht(0,4)
Tape? ht(0,5)
Disk? rl(0,0)
Last chance before scribbling on disk. 
End of tape
Boot
: rl(0,0)rl01htunix


unix/v7m 2.1

mem = 214400
# 

Attachment: v7m.mkdisttap.pl
Description: Perl program

Attachment: v7m.simh
Description: Binary data

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