Hi everybody,
the FreeDOS kernel is seriously slower then MSDOS when doing
larger copy/xcopy operations.
the cause: the disk I/O code avoids transfers that cross a 64K
boundary, and splits these transfers into 3 (smaller) transfers.
this was needed for floppy controllers in the 1980's, but is certainly
not necessary for harddisks after the IBM XT.
just skip
/* avoid overflowing 64K DMA boundary */
count = DMA_max_transfer(buffer, totaltodo);
for harddisks, and everything should be *much* faster (at least on
rotating media in a non-emulated machine)
Tom
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