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Old 04 August 2014, 13:13   #1
Leandro Jardim
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Maximum MaxTransfer and ATAPI speed (IDEfix97)

I have set up a hardfile and installed IDEfix97, and I want to tune the hard disk and cd-rom transfers, but I dont know what are the maximum values I can use for both, someone know it, please?
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Old 04 August 2014, 14:20   #2
alexh
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It was my belief that Maxtransfer was device specific, not host specific. Thus it depends on the capabilities of your IDE device.

Why not just use the safe values of 0x1FE00 or 0xFE00?

I don't believe the value of MaxTransfer has a big impact on performance or CPU overhead.

Last edited by alexh; 04 August 2014 at 16:35.
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Old 04 August 2014, 14:45   #3
Leandro Jardim
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Quote:
Originally Posted by alexh View Post
It was my believe that Maxtransfer was device specific, not host specific. Thus it depends on the capabilities of your IDE device.

Why not just use the safe values of 0x1FE00 or 0xFE00?

I don't believe the value of MaxTransfer has a big impact on performance or CPU overhead.
Hmm, yes you are right, this is what I read on another thread, too. But the value for ATAPI speed, there is not any problem in leaving them at 3 (maximum)? This hardfile will be used in WinUAE only.

I think I have found a bug, when I run OS 3.9 HDToolbox on WinUAE with IDE emulation and one CD-ROM Drive and there is not any CD-ROM disc in it, the system lock-ups and I need to reset.

Last edited by Leandro Jardim; 12 August 2014 at 13:48. Reason: Replaced "which" by "what"
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