Attaching SIMH devices without halting simulation?

william degnan billdegnan at
Sun Dec 31 15:47:25 CST 2017

Yes, but you were not able to attach in your startup script?  That's when
to do it.

Bill Degnan
twitter: billdeg
On Dec 31, 2017 3:59 PM, "Mark J. Blair via cctalk" <cctalk at>

> I've been experimenting with the SIMH VAX simulators a lot lately. The
> only way I know of to mount a tape, disk pack, CD-ROM, etc. after boot time
> is to halt the simulation with ^e to get to the SIMH command prompt, ATTACH
> the desired image, and then resume the simulation with CONTINUE.
> Is there any way to attach/detach media images in SIMH without halting the
> simulation? I've tried putting the system console on a telnet port so it
> doesn't occupy SIMH's controlling terminal, and I found that it's still
> necessary to halt the simulation to get back to the SIMH command prompt.
> --
> Mark J. Blair, NF6X <nf6x at>

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