The CI interface is the KLIPA. Its a KL10-only device that sits in an RH20 channel slot. It uses a port architecture similar to the CI780, with queues and 36-bit pointers in physical memory. It's supported in 7.04.
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. 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.) Have fun. On 09-Mar-17 11:58, Tim Stark wrote: > Folks, > > Hmm. I checked TOPS-10 7.04 monitor source codes and found two files about > SCS/SCA packet info but did not find any files about CI interface. > I think TOPS-10 can communicate through DECnet. > > I think that transport layers are SCS/SCA layers. > > There is commercial emulator (Charon-VAX) emulates CI hardware and HSJ50 > controllers. They are much faster than actual CI hardware. > > So that we can implement them on SIMH and other emulators possibly. > > Tim > > -----Original Message----- > From: Simh [mailto:simh-boun...@trailing-edge.com] On Behalf Of Rich Alderson > Sent: Tuesday, March 7, 2017 2:37 PM > To: simh@trailing-edge.com > Subject: Re: [Simh] CI750 tech docs and VAX firmware > >> Unless I remember totally wrong, only the HSC50 could do 576 byte sectors. >> It was dropped in a pretty early version of CRONIC, before support for >> any other HSC controller existed. > Correct. Only the HSC50 ever supported 576-byte sectors, and only on RA81 > and smaller drives. (We really wanted RA82s on our 4-system CI cluster at > Stanford LOTS, but were informed that it would never ever happen.) > > Rich > _______________________________________________ > Simh mailing list > Simh@trailing-edge.com > http://mailman.trailing-edge.com/mailman/listinfo/simh > > _______________________________________________ > Simh mailing list > Simh@trailing-edge.com > http://mailman.trailing-edge.com/mailman/listinfo/simh
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