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From: seimet@rhrk.uni-kl.de (Uwe Seimet [Chemie])
Newsgroups: comp.sys.atari.st
Subject: Re: Bug in TT hardware?
Message-ID: <1991May29.064319.14892@rhrk.uni-kl.de>
Date: 29 May 91 06:43:19 GMT
Article-I.D.: rhrk.1991May29.064319.14892
References: <1991May27.101719.2923@rhrk.uni-kl.de> <1991May28.130252.3634@lsuc.on.ca>
Distribution: eunet
Organization: University of Kaiserslautern, Germany
Lines: 27

jimomura@lsuc.on.ca (Jim Omura) writes on my article
<1991May27.101719.2923@rhrk.uni-kl.de> seimet@rhrk.uni-kl.de:

>     It sounds like the 68030 has "pre-fetch" active.  You can
>shut this off "manually".  Check a 68030 instruction list.  The
>only problem might be that the "pre-fetch" might be built into
>the driver and not over-rideable without writing your own driver.

I don't think the 68030 is responsible for the bus error. Remember that
the error is reported by the scsi controller. During dma transfer the 68030
is not active. I do use my own driver but there it is the same problem with the
original atari driver.
BTW, in AHDI 4.02 you still find an old error: After initialising the driver
exits with PTERMRES. Instead of specifying its length to stay resident it
uses its start adress as parameter for PTERMRES. The effect: after running
AHDI several times you run out of memory. The first time it is started you
loose about 64KBytes of RAM. This means that by using AHDI you have always
less memory than with other drivers (e.g. HDDRIVER).

********************************************************
*              Uwe Seimet                              *
*              seimet@sun.rhrk.uni-kl.de               *
*------------------------------------------------------*
* I hate this machine, I wish that they would sell it. *
* It doesn't what I want but only what I tell it.      *
* (Programmer's lament)                                *
********************************************************