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From: wtm@neoucom.UUCP (Bill Mayhew)
Newsgroups: comp.sys.ibm.pc
Subject: PeeCee warmboot via software
Message-ID: <727@neoucom.UUCP>
Date: Sun, 11-Oct-87 00:15:33 EDT
Article-I.D.: neoucom.727
Posted: Sun Oct 11 00:15:33 1987
Date-Received: Mon, 12-Oct-87 21:43:17 EDT
Organization: Northeastern Ohio Universities College of Medicine
Lines: 17
Keywords: Avoid the use of int 19H

Hello,

I mentioned this a few days back in another article I wrote, but I
think it may have dropped into the celestial bit-bucket when we had
a system crash.

Int 19H warmboot service request seems to be brain-damaged on all
but real IBMs and a few klone boxes.  As has been mentioned
previously, the magic cookie method of setting 0040:0072H equal to
to 1234H flags the BIOS to skip hardware initialization and memory
test.  This comes in real handy if you want to call an interrupt to
set your EGA card to CGA mode and then reboot for brain dead
software that demands CGA; fortunately such software is pretty much
limited to copy-proofed games.

--Bill
(wtm@neoucom.UUCP)