Re: A20 handler problem

From: Andrey Panin (pazke@orbita.don.sitek.net)
Date: Mon Jul 17 2000 - 08:40:52 EST

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Hi,

most(all?) modern PC chipsets support so called system
control port (0x92) which provides A20 line handling
along with other features.

AFAIK bit 1 of 0x92 port control A20 line:
0 - A20 disable / forced 0 (real mode)
1 - A20 address line enable

But I didn't try it, you warned :)).

Best wishes,
Andrey

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Next message: Kui Gao: "Help for disk scheduling"
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