[Simh] Dec-10 Day announcement from Living Computers: Museum + Labs

[Tim Shoppa]

In the ancient past the SMD-under-Massbus-emulation third party
manufacturers (Emulex, etc.) would give binary patch locations to enlarge
the RSTS/E drivers for full size use. I'm sure these had to change for
every OS release.

I don't think Mentec had a full release of RSTS/E in their time. 10.1 was
mostly Y2K ready in 1992, and I'm sure through the 1990's that Mentec sold
it, but 10.1 release predated Mentec's acquisition. (Remind me, was the
RSTS/E 10.1 Macro assembler date listing fully Y2K compliant? I remember
that being a sticking point under one of the OS's.)

Tim N3QE



On Mon, Dec 11, 2017 at 9:38 AM, Paul Koning <paulkoning at comcast.net> wrote:

>
>
> > On Dec 10, 2017, at 5:12 AM, Johnny Billquist <bqt at softjar.se> wrote:
> >
> > Rich. This is a nice thing. Thanks.
> >
> > I have one question/wish, though.
> > I don't know if you were aware of a device called the RM06. This was a
> Massbus disk created by Shelby, which was varible size.
> > It would be a really nice thing to emulate. I can probably reverse
> engineer it from the RSX driver, and I don't know which systems ever
> supported it. RSX for sure. Possibly also RSTS/E, but beyond that is more
> uncertain. Most people and systems had moved on from Massbus before this
> drive came out.
>
> RSTS should be able to handle a third party Massbus disk if it identifies
> itself by the ID code of a DEC disk and has the same geometry.  (More
> precisely: if it has more cylinders than the original, that would be ok,
> those would be ignored.  But track and sector counts must be exact.)
>
> With the source kit, you could add a new disk model, it isn't all that
> hard though it is completely undocumented.  I suppose it might be possible
> to *replace* an existing entry.  Haven't looked at that.  Studying the
> sources should tell us.
>
>         paul
>
>
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