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Old 24 June 2016, 11:47   #2
Toni Wilen
WinUAE developer
 
Join Date: Aug 2001
Location: Hämeenlinna/Finland
Age: 42
Posts: 19,561
It has nothing to do with CPU speed. There is some unknown emulation issue (could be qemu, could be blizzard board io bits working incorrectly) that probably causes it.

I am not interested in debugging it, too many unknowns and it is PPC related too.. Most likely any hardware level OS developer that has access to all documentation would find it very quickly. If they would care.

PIO IDE can never be as fast, emulated DMA is practically instant (host side simple and quick memory copy), PIO needs much more work from both emulator and emulated driver. I am 100% sure someone wuld be able to create working SCSI driver very easily now because it can be debugged under emulation. It makes debugging really easy and fast vs real hardware.
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