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Path: utzoo!watmath!watcgl!dmmartindale
From: dmmartindale@watcgl.UUCP (Dave Martindale)
Newsgroups: net.unix-wizards
Subject: Re: 4.1bsd vs. V80
Message-ID: <924@watcgl.UUCP>
Date: Thu, 6-Oct-83 12:33:47 EDT
Article-I.D.: watcgl.924
Posted: Thu Oct  6 12:33:47 1983
Date-Received: Fri, 7-Oct-83 10:06:44 EDT
References: <12225@sri-arpa.UUCP>
Organization: U of Waterloo, Ontario
Lines: 6

The 4.1BSD Versatec driver DOES do its DMA from user space; it calls physio
to set things up for the transfer.  You may be confused by the "struct buf
rvpbuf" allocated in the driver; this is a buffer header used to contain
control info which is filled in by physio, not a data buffer.

	Dave Martindale