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Using Multiple CPU Cores in DOS? (Miscellaneous)

posted by DOS386(R), 20.09.2011, 12:24

tom wrote:

> therefore it's fast, almost all time.

What is fast ? INT $21 ?

tom wrote:

> the BIOS doesn't care about A20. unexpected things would
> happen if int15.87 is called with A20 disabled.

but wrote:

> 03h address line 20 gating failed


What about accessing MMIO (all addresses having A20 bit = ZERO) without "fiddling" A20 ?

This is a LOGITECH mouse driver, but some software expect here
the following string:*** This is Copyright 1983 Microsoft ***


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