sritchie@cs.ubc.ca (Stuart Ritchie) (06/25/91)
We are about to receive a few MVME188 quad boards from Motorola. At the moment, all the documentation I have are the MC88100 and MC88200 User Manuals. Suppose we had 2 quad boards enclosed in the same VME card cage. What forms of communication are possible across the VME bus? One board will be running Unix SVR3.2, the other will run our own special purpose o/s. At the moment I'm reading "How to Write a Unix Device Driver" to help me out with the Unix side. (Any other book recommendations?) Is there some mechanism to interrupt a remote CPU board and initiate DMA data transfer? Or is memory mapping the way to go? Efficiency is a big issue, we will want to move large chunks of data. I suppose I really need the MVME188 docs, but until then, any hints? Stuart sritchie@cs.ubc.ca (One paper I have read indicates that memory mapping across the VME bus is quite inefficient, 30Mbps....)