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From: michael@mcdchg.chg.mcd.mot.com (Michael Bodine)
Newsgroups: comp.sys.mac.programmer,comp.sys.mac.comm,comp.sys.mac.hardware
Subject: Re: Mac <-- VME communications: Suggestions sought
Message-ID: <65817@mcdchg.chg.mcd.mot.com>
Date: 27 Jun 91 15:42:16 GMT
References: <1991Jun26.163426.48242@cc.usu.edu>
Reply-To: michael@chg.mcd.mot.com (Michael Bodine)
Followup-To: comp.sys.mac.programmer
Organization: Motorola Computer Group, Schaumburg, IL
Lines: 25

Scott E. Parker (slp9m@cc.usu.edu) writes:
> I need to get data from a VME bus based machine into a Mac II as fast as
> possible.  I have seen (but can't remember where) cards that let macs 
> arbitrate for and read from the VME bus directly.  Can anyone provide
> references?  Is this the way to go?  What other options exist?  Pros & cons?
VME to Nubus cards can be purchased from:
Bit3 Computer
8120 Penn Ave S
Minneapolis, Mn 55431
(612) 881-6955
Their model 453 board allows the MacII to access VMEbus memory directly.
There are other vendors of such boards, but i don't have their
address/phone readily available.  We have customers who have used other
Bit3 products successfully, tho' none using this particular board.

Another method is to put your VME chassis on the same SCSI bus as the
MacII and its disk drive, then to do your communications via SCSI
transactions.  Motorola has the MVME147 series of cpus that have built-in
SCSI support that have been used in this way.

Probably your choice would depend on the required data rate, ease of
programming and cost considerations.
-- 
[  Michael Bodine, michael@chg.mcd.mot.com, Dial: (708) 576-7840, FAX: x8875  ]
[  Motorola TSD; Loc IL38; 1100 Woodfield; Suite 334;  Schaumburg, Il  60173  ]