Doing DU0 bootable with RT11 5.3 from one TU58

SPC spedraja at
Fri Jun 19 01:27:49 CDT 2009

Thank you, David. The information is correct. I installed succesfully RT11
5.3 in the ESDI drive. And, by now, at least can start my PDP-11/23 PLUS
with one Operating System :-)

Complementing previous information, the system has (by now) 2044Kw (4Mb) of
memory in a couple of memory boards, and one Dilog DQ696 with its own setup
ROM in 175000. This is important, because I can't bootstrap the DU (by now
too) from the "START?" prompt of the PDP-11/23 PLUS and I must do it from
the ODT prompt with this sequence:


If I've read my manuals correctly I think that is possible to automate this
with switches in the DQ696 and the PDP cpu and front panel.

I leave the previous messages below of this answer for someone that want to
use it for configuration purposes.

Thanks again. Regards.

2009/6/18 Dave McGuire <mcguire at>

> On Jun 18, 2009, at 5:18 PM, SPC wrote:
>> I started one virtual TU58 with RT11 5.3  from the COM1 of my laptop in my
>> PDP-11/23 PLUS using TU58EM.
>> In the same machine I have one DILOG DQ696 with one ESDI hard drive of 768
>> Mb. I want to convert the ESDI drive in a bootable device with RT11.
>> I've initialized the DU0 and copied the complete system from the DD0
>> (TU58)
>> Searching for the fast path to continue... Someone knows what must I do
>> exactly now to continue ? Thanks in advance.
>  If you're certain the target disk contains DU.SYS (or DUX.SYS as
> appropriate), you'll need to make it bootable.  For example, this is how to
> do it using RT11SJ.  This is from memory, you may want to double-check the
> syntax in the help system:
>           -Dave
> --
> Dave McGuire
> Port Charlotte, FL

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