[mod.computers.vax] MicroVAX shared memory?

bon@JPL-VLSI.ARPA (01/20/87)

We are developing a system in which we need high performance communication
between two MicroVAXs, one running VMS and the other Unix.  The ideal 
approach, because of minimum software development and overhead and maximum 
performance, would be some type of shared memory.  An alternative approach 
would be to use parallel ports.  The following questions all relate to this 
communication issue:

  - We have a pair of Ranyan shared memory cards, but have been unable to
    get them to function properly, and have gotten grossly inadequate
    support from Ranyan.  Has anyone experience with the Ranyan product?
    Has anyone gotten them to work under VMS?  Under Unix?

  - Does anyone know of any competitive shared-memory products?  Sources?

  - We have DRV11-WA parallel interfaces, and there is a driver in VMS that
    is designed to work with it, but under VMS 4.3 it doesn't work because
    DEC modified the design of the DRV11-WA hardware and the software folks
    haven't caught up.  Does the driver work under VMS 4.4 or 4.5?  Anybody
    know when/if it will be fixed?

  - Anybody have Unix drivers for DRV11-WA, DRV11-J or even plain DRV11 boards?

  - Recommendations on high-performance parallel interface cards, preferably
    with on-board buffering?  Sources?  Drivers?

  - Other suggestions?

Thanks for any assistance you can give.

					Bruce Bon
					Bon@JPL-VLSI.ARPA