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Dif. MTRR WC setting behavior under v86-question for Japheth (Developers)

posted by RayeR(R) Homepage, CZ, 04.01.2019, 05:58

When I loaded HDPMI32 -r then DOS4GW games benefits from MTRR WC speed up!
Unfortunatelly it's not compatible with Yamaha's DSDMA.EXE. When I load it after HDPMI32 it cancel the speed up effect. If I try to load HDPMI32 after DSDMA then HDPMI32 prints nothing and is not loaded.

So question remains - what changes when HDPMI32 -r is loaded for DOS4GW programs? I still can see DOS4GW startup message but I would expect that it forwards DPMI requests from the application to loaded DPMI server. OK, then there must be something different with memory mapping function that DOS4GW does differently than HDPMI32/CWSDPMI.

DOS gives me freedom to unlimited HW access.


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