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From: ron@topaz.rutgers.edu (Ron Natalie)
Newsgroups: comp.periphs
Subject: Re: VME disk controller review (Cheetah, Rimfire) (long)
Message-ID: <14514@topaz.rutgers.edu>
Date: Mon, 7-Sep-87 12:41:13 EDT
Article-I.D.: topaz.14514
Posted: Mon Sep  7 12:41:13 1987
Date-Received: Tue, 8-Sep-87 02:33:24 EDT
References: <8709062258.AA22818@ephemeral.ai.toronto.edu>
Organization: Rutgers Univ., New Brunswick, N.J.
Lines: 10
Keywords: vme, review, fast, sun

I have the Ciprico Rim Fire 2220 (Multibus II) controller and it seems
to be pretty nice.  One interesting aspect of the driver they provide
is the absence of any I/O queue in the driver.  Since you can tag Multibus
II Requests/Completions with an arbitrary number (like the buffer pointer)
they just stuff them all into the controller as they come in and then
just iodone 'em when the completion comes back.  Amusing.  Multibus II
message passing is very handy for UNIX drivers.  Everything falls into
place nicely.

-RON