[HECnet] SIMH on CentOS 5.6

[hvlems at zonnet.nl]

While in simh commandmode, show the devices that are seen in simh. 
Do the same in srm mode: sho dev 
The boot device type may be DK, RQ or DQ, I forgot
You must have typed it in: to assign the hosts cd drive to a iunit name.
Verzonden vanaf mijn draadloze BlackBerry  -toestel

From: Ian McLaughlin <ian at platinum.net>
Sender: owner-hecnet at Update.UU.SE
Date: Mon, 5 Sep 2011 15:57:38 -0700
To: <hecnet at Update.UU.SE>
ReplyTo: hecnet at Update.UU.SE
Subject: [HECnet] SIMH on CentOS 5.6

Hello All,

I'm trying to compile and run SIMH on CentOS 5.6.   I've followed the instructions at  http://www.wherry.com/gadgets/retrocomputing/vax-simh.html but when I try to boot from the CD image, I get:

[root at zork data]# /usr/local/vax/bin/vax  

VAX simulator V3.8-1
NVR: buffering file in memory
RQ: unit is read only
Eth: opened eth0


KA655-B V5.3, VMB 2.7
Performing normal system tests.
40..39..38..37..36..35..34..33..32..31..30..29..28..27..26..25..
24..23..22..21..20..19..18..17..16..15..14..13..12..11..10..09..
08..07..06..05..04..03..
Tests completed.
>>>boot dua3
(BOOT/R5:0 DUA3



   2..
-DUA3
?42 NOSUCHFILE, DUA
HALT instruction, PC: 00000C1A (MOVL (R11),SP)
sim>  


Any ideas about what I might be doing wrong?   The CD image file I made directly from the Montagar 7.3 CD.   The vax.ini file is exactly as shown on the instructions page.

Thanks in advance for any suggestions!

Ian