Groups > comp.os.msdos.programmer > #444

Re: Persistent memory during reset

From	"wolfgang kern" <nowhere@never.at>
Subject	Re: Persistent memory during reset
Message-ID	<jbbm1a$3k2$2@newsreader2.utanet.at> (permalink)
Date	2011-12-03 00:07 +0100
Organization	KESYS-development
References	<de96da1c-b329-4bab-9761-0e8bf36f0686@h3g2000yqa.googlegroups.com> <jb6n6o$i65$1@speranza.aioe.org>
Newsgroups	comp.lang.asm.x86, alt.os.development, comp.os.msdos.programmer

Cross-posted to 3 groups.

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Rod Pemberton asked for:

>> Is there any standard region of BIOS or x86 platform memory
>> that persists after a system reset.

There is at least one known BIOS-restart-mode which wont alter
(clear) memory-regions not used by the BIOS itself of course.

it should be a value like 1234h vs. abcdh somewhere stored before RESET ?

Known is at least the EBDA-region which will remain after a 'brown-out'.

Some BIOS allow to clean or keep everthing in RAM while power-up.
And this is long before any OS  gain control ...

__
wolfgang

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Thread

Re: Persistent memory during reset "Rod Pemberton" <do_not_have@nospicedham.noavailemail.cmm> - 2011-11-30 21:03 -0500
  Re: Persistent memory during reset "wolfgang kern" <nowhere@never.at> - 2011-12-03 00:07 +0100
  Re: Persistent memory during reset Ruud Baltissen <rbaltissen@nospicedham.gmail.com> - 2011-12-29 09:44 -0800
    Re: Persistent memory during reset Robert Wessel <robertwessel2@nospicedham.yahoo.com> - 2011-12-30 01:34 -0600

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