> I'm looking for any documentation on the DSSI opcodes, or a reference to a
> DEC EK-xxx document that documents same if you know of one. Can anyone help
> out here?
> 
> On a related note, I was musing that as I attached disk and tape units I'd
> call them 'dd0, dd1, ..., dt0, dt1 ...' (as in DSSI Disk 0, DSSI Tape 0,
> etc) My /dev directory doesn't seem to have any devices by that name so
> they would appear to be free for use, but you never know ...

no, DSSI disks should be treated liek any other MSCP disks, and use the 
ra device names. DSSI disks can be thought of as a self contained unit 
with its own HSC and a single disk attached to that HSC. thats why DEC 
called them 'independent storage elements'. The DSSI protocol is actually 
a subest of CI, as evidenced further by such things as the SHAC chip 
being used for the DSSI stuff on some machines. SHAC is a single-chip CI 
adapter. In any case the language spoken over this CI is MSCP. 

Isildur