Xref: utzoo comp.arch:12506 comp.misc:7436
Path: utzoo!attcan!uunet!aplcen!samsung!usc!apple!fox!portal!cup.portal.com!mmm
From: mmm@cup.portal.com (Mark Robert Thorson)
Newsgroups: comp.arch,comp.misc
Subject: Re: Multibus II <-> VME adapter?
Message-ID: <24293@cup.portal.com>
Date: 21 Nov 89 03:55:24 GMT
References: <759@anagld.UUCP>
Organization: The Portal System (TM)
Lines: 11

I imagine that Multibus II <-> VME compatibility would require a little more
work than just buying a converter.  Multibus II is not a normal bus.  For one
thing, a Multibus II board expects the backplane to have a thing called a
Central Services Module to handle some system configuration issues.  For
another, Multibus II implements a rather complex message-passing protocol,
in addition to normal master-mode and slave-mode cycles.  If all you want
is to talk to VME using the latter, a converter might be all you need.

On the other hand, if you want to convert the message-passing protocol into
VME cycles (or vice versa), I'll bet you'll have to rewrite some firmware
on either your Multibus board or your converter.