Neil%Teleos.com@ai.sri.com (05/27/89)
We have some image processing board which reside in a multibus cardframe, and we would like to interface them to both a Sun and a DECstation 3100 (not both at the same time!). Does anyone know of a source of VMEbus to multibus repeater cards which could help us with this problem? What appears to be required is a VME card which plugs into the Sun or DECstation, a second card which plugs into the multibus cardframe, and a bundle of cables which link the two cards together. I have a multibus to multibus repeater which we use to allow our old Sun2s to talk to the system, and I know that VMEbus to VMEbus repeaters exist (as used by Datacube, for example, to link their MaxVideo systems to Suns). What are the issues in protocol conversion between these two busses? Presumably the multibus (in 20 bit address space on our system) in 16 bits mode could appear as a portion of the VMEbus space in A24D16 or A32D16 modes. Any data byte order problem is easily taken care of in software, at least for our application. An additional question - is there a mailing list equivalent to SunSpots for users of the DECstation? (Sadly DEC's discount schedule for universities appears better than Sun's...) Neil/. Neil%Teleos.com@AI.SRI.com ...!decwrl!argosy!teleos!Neil