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OpenVMS Hobbyist Program | VAX Systems Forums | Emulated VAX Forum
Author Using physical CD with SIMH

Posts: 5
Joined: 18.03.10
Posted on June 03 2010 04:28
I have seen the VMS technical Journal article about adding physical CD support to SIMH. My version of SIMH (the latest - 3.8-1) does not seem to support this and I can't find it on the Migration Specialities site either.

Is this possible? How?

Author RE: Using physical CD with SIMH

Posts: 36
Joined: 04.03.10
Posted on June 04 2010 07:05
Nothing in the change log about such a feature either.
Author RE: Using physical CD with SIMH

Posts: 16
Location: desk
Joined: 03.05.08
Posted on June 17 2010 08:33
Haven't read that article so not sure if this is what you want. But when running SimH on Mac OS X (i guess Linux will behave the same) just add the path to your CD drive in your configuration file.


attach -r rq3 /dev/disk2s0

Author RE: Using physical CD with SIMH

Posts: 459
Joined: 15.04.08
Posted on June 23 2010 02:47
Tried that with Ubuntu Linux and it did not work. SimH wants a file or partition.

I was able to use unformatted partitions on virtual disks created by Virtual box which Ubuntu was running under.

I got access to the Mac's CD-ROM by running FreeAXP in another Virtual Box VM and clustering the two systems. Through MSCP this works.
Author RE: Using physical CD with SIMH

Posts: 16
Location: desk
Joined: 03.05.08
Posted on June 29 2010 11:23
I'm starting SimH sudo'ed.

Were you running it as root as well?
Author RE: Using physical CD with SIMH

Posts: 459
Joined: 15.04.08
Posted on June 29 2010 18:16
I am running SimH Sudo'ed. It is in on a Linux VM that is mostly dedicated to it.
Author RE: Using physical CD with SIMH

Posts: 16
Location: desk
Joined: 03.05.08
Posted on July 01 2010 00:34
I'm running it under my regular Mac OS system. Ok, never mind, it was just a thought...

I looked up my folder with the docs.

"SIMH FAQ 07-Sep-2005" on page 7 it says:

2.5 How do I transcribe a real CD for use with SIMH?
- On UNIX, you can copy a CD to an ISO file with the dd command:
% dd /if=/dev/raw_cd_device /out=/path/cdimage.iso
- Linux, and many Unix variants, support direct access to the CD ROM from SIMH:
sim> set rq1 cdrom
sim> att rq1 /dev/cdrom_drive

So i've forgotten to mention the "set" command. sorry!

But as said, it's working here:

In my vax.ini:
set rq3 rrd40
attach -r rq3 /dev/disk3s0

On the console:
sim> sh rq3
RQ3, 681MB, attached to /dev/disk3s0, read only, read only, RRD40
Author RE: Using physical CD with SIMH

Posts: 459
Joined: 15.04.08
Posted on July 07 2010 16:04
I just tried that and it worked this time.

I think I specified the mount point before instead of the device link.

So now I can use the virtual box cdrom manager to change which cd-rom image or even the physical cd-rom.
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