Path: utzoo!attcan!uunet!mcvax!unido!laura!trillian!klute
From: klute%trillian.irb@unido.uucp (Rainer Klute)
Newsgroups: comp.sys.atari.st
Subject: Re: How not to boot from your hard disk.
Message-ID: <489@laura.UUCP>
Date: 19 Jul 88 13:16:17 GMT
References: <8807021540.AA22916@ucbvax.Berkeley.EDU> <1094@atari.UUCP>
Sender: root@laura.UUCP
Reply-To: klute%trillian.irb@unido.UUCP (Rainer Klute)
Organization: University of Dortmund,West Germany
Lines: 25

In article <1094@atari.UUCP> apratt@atari.UUCP (Allan Pratt) writes:
>*************************************************************************
>*									*
>* COLD cold boot code: copy a bit of code to $8, then jump to it.	*
>* The bit of code clears RAM starting from its own end, until it	*
>* gets a bus error.  Then it jumps to the start of the ROM.		*
>*									*
>* This will obliterate any eternal RAM disks, caches, auto-booting	*
>* hard disks, etc., and give you the coldest boot you can get without	*
>* turning off the power.  Colder, on a Mega, because the RAM holds	*
>* its contents for >10sec sometimes.					*
>*									*
>*************************************************************************

Why not simply set memvalid (0x0420) to zero and jump through 0x0004?

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|   Rainer Klute            | UUCP:   klute@unido.uucp                 |
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