AOpen AP55CS User Manual page 63

AMI BIOS
Secondary Controller Hard Disks
You may install additional hard disk(s) in your system. This
parameter lets you set the number of hard disks that can function as
secondary controller. The allowable maximum number is 2.
Secondary Controller 32-bit Transfer
Enabling this function improves disk performance of the PCI IDE
functioning as secondary controller by increasing the data transfer
rate from 16 bit to 32 bit. However, if you select the add-on card to
function as the primary controller, you must check your add-on card
manual before enabling the parameter. The default setting is
.
Disabled
Secondary Master
ADVANCED PIO
This parameter lets you set the PIO mode that your onboard PCI IDE
functioning as secondary master supports. The selections are from
Mode 0 to Mode 4, Auto and Disabled. Set this parameter either by
entering the PIO mode manually or selecting Auto to automatically
detect the supported PIO mode. Disable the parameter to bypass the
feature. The default setting is Auto .
BLOCK MODE
Enabling this feature enhances the performance of the disk
functioning as secondary master by allowing the data transfer in
block (multiple sectors). This increases the data transfer rate to 256
bytes/cycle. Disable the parameter to disregard the feature. The
default setting is
Disabled.
4-16 User's Guide