I-Bus IBC 2600, User Manual

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Chapter 3 - Standard CMOS Setup
3-7
IBC 2600 User’s Guide
If Block Mode is set to On and is supported by the IDE drive, AMIBIOS
enables multi-sector transfers. AMIBIOS sets the number of sectors to be
transferred per interrupt to the value returned by the ”identify drive” com-
mand.
Available options are:
Off
On
Programmed I/O (PIO) Mode
IDE PIO mode programs timing cycles between the IDE drive and the
programmable IDE controller. As the PIO mode increases, the cycle time
decreases.
Set the PIO Mode option to Auto to have AMIBIOS select the PIO mode
used by the IDE drive being configured. If you select a specific value for
the PIO mode, you must make
absolutely certain that you are selecting
the PIO mode supported by the IDE drive being configured.
Available options are:
Auto
0
3
1 4
2 5
32Bit Mode
Hard disk drives connected to the SBC via the ISA Bus transfer data 16
bits at a time. An IDE drive on the PCI Local Bus can use a 32bit data
path.
If the 32Bit Mode parameter is set to On , AMIBIOS enables 32-bit data
transfers. If the host controller does not support 32-bit transfer, this fea-
ture must be disabled.
Available options are:
Off
On
Boot Sector Virus Protection
This option allows you to request AMIBIOS to issue a warning when any
program or virus issues a Disk Format command or attempts to write to
the boot sector of the hard disk drive.