Got DSM-11 running, any manuals online?

Eric Smith spacewar at
Fri Jan 8 19:57:20 CST 2021

On Fri, Jan 8, 2021 at 6:17 PM Paul Koning <paulkoning at> wrote:

> Yes, but also to hide bad blocks.  So the difference between a raw sector
> dump and a SIMH container file is, minimally, the spare sectors.  What that
> looks like depends on the format; I have no idea what MSCP controllers did.

MSCP controllers do the bad block mapping, so AFAIK the disk _always_ looks
to the host like a linear array 0..n-1 of 512-byte blocks.

When accessing an MSCP disk, the host should not, unless running special
diagnostics, be able to distinguish what kind of disk is in use, aside from
that it has a particular block count.

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