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From: Alain <al...@po...> - 2005-06-30 14:36:21
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I received this in PVT, but I believe it may interrest... Hi Johnson, MS DOS does not use the HMA for BUFFERS as far as I know, so indeed: The 10-20% slowdown if DOS=HIGH should not happen on MS DOS. But on the other hand, buffers in HMA give you a lot more DOS RAM free :-). The real problem is the UMB slowdown, and Alain tells that things get VERY slow with DOS=UMB. So if MS DOS avoids that, it would be interesting to know. Or maybe using MS EMM386 or MS HIMEM or MS whatever is the point here? I do not think that the kernel causes UMB slowdown - looking at our kernel design, I think that only 5-15% slowdown should happen with UMBs. |