> On Mar 11, 2017, at 4:53 PM, Paul Koning <[email protected]> wrote: > > >> On Mar 11, 2017, at 4:42 PM, Johnny Billquist <[email protected]> wrote: >> >> On 2017-03-11 22:33, Tim Stark wrote: >>> Yeah. >>> >>> I believe so. That is possible to replace CI/DSSI physical layer with UDP >>> over IP multicast to embed SCS/MSCP packets to other hosts and HSCs at once. >> >> Of course this is doable. The network part itself is not even hard. The big >> work is actually implementing the CI controller emulation. Once you have the >> packet to send out, you just send it. > > It's probably not as easy as you might think. As I mentioned, the CI > protocol (SCA) is an RDMA protocol ("named buffers"). If you want to emulate > CI, you'd have to emulate that, because the host code that talks to the CI > expects that service, and the real CI interfaces provide it on the I/O card. > You could use the LAVC protocol spec (if there is one available) as > inspiration, but it may be that LAVC doesn't provide the same application > services as SCA does.
Digital Technical Journal number 5 (http://bitsavers.informatik.uni-stuttgart.de/pdf/dec/dtj/dtj_v01-05_sep1987.pdf) might be helpful. Not exactly a protocol spec for either SCA or LAVC but at least an outline of both. paul _______________________________________________ Simh mailing list [email protected] http://mailman.trailing-edge.com/mailman/listinfo/simh
