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IDE Master/Slave Drive PIO (Auto)

This option allows you to set the PIO (Programmed Input/Output) mode for the

two IDE devices (Master and Slave drives) attached to a particular IDE chan-

nel. Normally you should leave it as Auto and let the BIOS auto-detect the IDE

drive’s PIO mode. You should only set it manually for the following reasons:

• If the BIOS cannot detect the correct PIO mode

• If you want to try to run the IDE device with a higher PIO mode that

it was designed for

• If you have over-clocked the PCI bus and one or more of your IDE

devices cannot function properly (you can correct the problem by

using a slower PIO mode)

Note: Over-clocking the PIO transfer rate can cause loss of data.

Primary/Secondary Master/Slave Drive UltraDMA (Auto)

This option allows you to enable or disable UltraDMA support (if available) for

the two IDE devices (Master and Slave drives) attached to that particular IDE

channel. Normally, you should leave it as Auto and let the BIOS auto-detect if

the drive supports UltraDMA. If it does, the proper UltraDMA transfer mode

will be enabled for that drive, allowing it to burst data at up to 100MB/s. You

should only disable it for troubleshooting purposes.

Note: Setting this to Auto does not enable the UltraDMA or any of the slower

DMA mode for IDE devices that do not support UltraDMA. Also, in order

for any of those DMA modes to work (including UltraDMA modes), you

will have to enable DMA transfer via the OS.

IDE DMA Transfer Access (Enabled)

This item allows you to enabled the transfer access of the IDE DMA.

IDE Burst Mode (Enabled)

This option, when enabled will instruct the system to send every write transac-

tion to the write buffer. Burstable transactions then burst onto the PCI bus and

nonburstable transactions do not.

Press <Esc> to return to the Integrated Peripherals screen.

ECS SF2/648FX User Manual

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