> On Mar 9, 2017, at 12:27 PM, Timothe Litt <[email protected]> wrote:
>
> ..
> With respect to an earlier question about CI emulation: The best approach
> may be to emulate it as multicast ethernet. Setup a couple of groups for
> each star coupler. Each coupler supports up to 32 nodes. For VMS, half o
> them hosts, half storage. CI is a 50Mb/s (might be 70, but I remember 50
> from the initial doc) CSMA/CD bus.
70 Mb/s is the number I always saw.
> The cabling is redundant (A & B cables), so assign one MC group to each per
> star. (Yes, there are DECnet drivers for on multiple OSs. I think it was
> considered a multipoint medium with addresses related to (CI) node numbers
> rather than an ethernet (broadcast) - but it's been a while.)
I don't think DECnet ever supported CI. It certainly doesn't show up in the
DECnet architecture specs anywhere.
paul
_______________________________________________
Simh mailing list
[email protected]
http://mailman.trailing-edge.com/mailman/listinfo/simh
