Path: utzoo!utgpu!news-server.csri.toronto.edu!rutgers!cbmvax!cbmehq!babylon!rbabel
From: rbabel@babylon.rmt.sub.org (Ralph Babel)
Newsgroups: comp.sys.amiga.hardware,amiga.crosspost
Subject: Re: Too many partitions for 14.4k
Message-ID: <08513.AA08513@babylon.rmt.sub.org>
Date: 15 Jun 91 18:30:01 GMT
References: <ba569s984.7653@sycom.UUCP> <1991Jun15.223714.28874@Sandelman.OCUnix.on.ca>
Reply-To: cbmvax.commodore.com!cbmehq!babylon!rbabel (Ralph Babel)
Lines: 16

In article <1991Jun15.223714.28874@Sandelman.OCUnix.on.ca>,
mcr@Sandelman.OCUnix.on.ca (Michael Richardson) writes:

> Is this a Series I or II? i.e. is it a DMA controller? If
> it uses polled I/O (likely inside an IPL 7 loop), then no
> wonder you are having problems.

GVP's SCSI drivers have *NEVER* used polled I/O; the Impact
Series-I uses an on-board buffer of 16K (in most cases),
i.e. usually one interrupt per 16K. The Series-II requires
one interrupt per command (unless an error or disconnect
occurs). In no event does the driver use single-byte I/O.
And all of GVP's boards use IPL 2, and all actions are
deferred to the driver task level, of course.

Ralph