Advanced Pio Mode; Dma Transfer Mode; Cd-Rom Drive Dma Mode - Acer Aspire 7100 System Service Manual

Advanced PIO Mode

When set to Auto, the BIOS utility automatically detects if the installed hard disk
supports the function. If supported, it allows faster data recovery and read/write
timing that reduces hard disk activity time. This results in better hard disk
performance. To disregard the feature, change the setting to Disabled.
NOTE This parameter appears only when you are at the Advanced Level.
Hard Disk 32-bit Access
Enabling this parameter improves system performance by allowing the use of
the 32-bit hard disk access. This enhanced IDE feature works only under DOS,
Windows 3.x/95/98, and Novell NetWare. If your software or hard disk does not
support this function, set this parameter to Disabled.
NOTE This parameter appears only when you are at the Advanced Level.

DMA Transfer Mode

The Ultra DMA and Multi-DMA modes enhance hard disk performance by
increasing the transfer rate. However, besides enabling these features in the
BIOS Setup, both the Ultra DMA and Multi-DMA modes require the DMA driver
to be loaded. By setting this parameter to Auto, BIOS automatically sets the
appropriate DMA mode for your hard disk.
NOTE This parameter appears only when you are at the Advanced Level.

CD-ROM Drive DMA Mode

Set this parameter to Enabled to enable the DMA mode for the CD-ROM drive.
This improves the system performance since it allows direct memory access to
the CD-ROM. To de-activate the function, set the parameter to Disabled .
NOTE This parameter appears only when you are at the Advanced Level.
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