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Using Multiple CPU Cores in DOS? (Miscellaneous)

posted by RayeR(R) Homepage, CZ, 19.09.2011, 15:01

> > > I think that A20 is fiddled only when acessing HMA so it's useless for
> > > reaching MMIO at higher address.
> wrong. A20 must be fiddled with for every access above 1M.

Yes but I though that when accessing all mem >1MB in PM it use some native mode where all CPU address pins go directly to memory and A20 hack logic is disabled. I belived this is used only in real mode to access HMA. But I may be wrong.

DOS gives me freedom to unlimited HW access.


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