[HECnet] DECnet-RT?

[Peter Allan]

Thanks Bob,

I thought I had done exactly that yesterday and it did not boot, but before
replying I thought I should try again, just to be sure, and it worked!

I now realise that I just attached the file to rq0, whereas yesterday I
used rq3, simply because I am used to doing that on my simulated VAX.

Thanks you your help. I should be able to make progress from here.

Peter


On Tue, 31 Mar 2020 at 15:01, Robert Armstrong <bob at jfcl.com> wrote:

>   I haven’t used this particular CDROM so I can only speculate, but here
> are a couple of things that might help –
>
>
>
>   RT11 has an architectural limit of 32Mb per file system.  Most disk
> drives, even way back then, are bigger than that and have to be partitioned
> if you want to use all the space.  This is an RT11 thing, not a CDROM nor a
> PDP-11 nor a simh, feature.
>
>
>
>   I assume the first partition on the CDROM is bootable.  You’d CDROM
> image to simh as a rq device and boot it.  Once RT11 is running, you can
> use the RT11 “SET DUn UNIT=n PART=n” command to assign the other DUn units
> to partitions on the same CDROM.  Check the RT11 commands manual for a
> description of the SET DU command.
>
>
>
>   Hope that helps,  It’s kind of vague, I know, but I haven’t used these
> CDROM images.
>
>
>
> Bob
>
>
>
>
>
> *From:* owner-hecnet at Update.UU.SE [mailto:owner-hecnet at Update.UU.SE] *On
> Behalf Of *Peter Allan
> *Sent:* Tuesday, March 31, 2020 4:26 AM
> *To:* hecnet at update.uu.se
> *Subject:* Re: [HECnet] DECnet-RT?
>
>
>
> Thanks to Ray, I now have the v1 and v5 of the RT-11 CD (well, the ISO
> file of it). However, I am confused by the nature of the virtual CD.
>
>
>
> I have extracted the file RTV5RL.03 and started an installation using it.
> I have not continued with the installation, but it looks like it should
> work.So far,so good.
>
>
>
> However, the file README.1st refers to there being several RT11
> partitions on the CD and that  some of these are bootable. I have never
> come across multiple partitions on a CD and I don't know how to access
> them. The SIMH ATTACH command appears to only connect to files, not
> partitions on a disk.
>
>
>
> So I am stuck. Any suggestions?
>
>
>
> Peter Allan
>
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