> On Dec 10, 2017, at 5:12 AM, Johnny Billquist <[email protected]> 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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