Installing Ultrix 4.0 on SIMH

Installing Ultrix 4.0 is surprisingly pretty easy!

Requirements

• An Ultrix 4.0 tape image
• A running copy of SIMH

The tape

First you will need an Ultrix 4.0 tape image. Currently the only known place to obtain the peices is here. Download all the parts, then use the mkdisttap.pl script to create your tape image.

SIMH

Simh can be obtained from here, and of course from here. Building SIMH isn't in the scope of this document, just grab some binaries and let's go.

Installing

To start the install we'll need to setup an ini file. This is the settings that I know will work.

ultrix.ini

set cpu 16m
set tto 7b
set tti 7b
set cr dis
set lpt dis
set rl dis
set rq0 ra81
att rq0 ultrix.dsk
set rq1 dis
set rq2 dis
set rq3 dis
set ry dis
set ts dis
set tq tk50
att tq0 ultrix40.tap
;set xq dis
;att xq 1
;att nvr ultrix.nvr
;dep bdr 0
boot cpu