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From: seimet@rhrk.uni-kl.de (Uwe Seimet [Chemie])
Newsgroups: comp.sys.atari.st
Subject: Bug in TT hardware?
Message-ID: <1991May27.101719.2923@rhrk.uni-kl.de>
Date: 27 May 91 10:17:19 GMT
Sender: seimet@rhrk.uni-kl.de (Uwe Seimet [Chemie])
Organization: University of Kaiserslautern, Germany
Lines: 23


Did anyone ever try to save the last four bytes of TT-RAM on the TT's
internal hard disk? This operation always fails because the scsi
controller reports a bus error. (You don't get any bombs, because it's
not a processor-related error. The hard disk driver simply aborts with
the usual alert.)
This problem doesn't seem to be driver dependant. It looks as if the
controller tries to access not only the last bytes of TT-RAM but some
bytes on higher adresses, too. Of course, at these adresses there is
no RAM, so this explains the bus error. If the last byte to transfer
lies at least four bytes below the end of the physical RAM everything
is fine.
Is there any reasonable explanation or is this some kind of hardware
bug?

********************************************************
*              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)                                *
********************************************************