Motherboard Technical Specification
Page
22
Type
How to Configure
SCSI
Select
Type
. Select
Not Installed
o the drive parameter screen. The SCSI
drivers provided by the SCSI manufacturer should allow you to configure
the SCSI drive.
IDE
Select
Type.
Select
Auto
to let AMIBIOS determine the parameters. Click
on OK when AMIBIOS displays the drive parameters. Select
LBA Mode
.
Select
On
if the drive has a capacity greater than 540 MB.
Select
Block Mode
. Select
On
to allow block mode data transfers. Select
32-Bit Mode
. Select
On
to allow 32-bit data transfers. Select the
PIO
Mode
. It is best to select
Auto
to allow AMIBIOS to determine the PIO
mode. If you select a PIO mode that is not supported by the IDE drive, the
drive will not work properly. If you are absolutely certain that you know
the drive’s PIO mode, select PIO mode 0 - 4, as appropriate.
CD-ROM
Select
Type
. Select
CDROM
. Click on
OK
when AMIBIOS displays the
drive parameters.
Standard
MFM
Select
Type.
You must know the drive parameters. Select the drive type
that exactly matches your drive’s parameters.
Non-
Standard
MFM
Select
Type.
If the drive parameters do not match the drive parameters
listed for drive types 1 - 46, select
User
and enter the correct hard disk
drive parameters.
Entering Drive Parameters
You can also enter the hard disk drive parameters. The drive parameters are:
Parameter
Description
Type
The number for a drive with certain identification
parameters.
Cylinders
The number of cylinders in the disk drive.
Heads
The number of heads.
Write
Precompensation
The actual physical size of a sector gets progressively
smaller as the track diameter diminishes. Yet each
sector must still hold 512 bytes. Write
precompensation circuitry on the hard disk
compensates for the physical difference in sector size
by boosting the write current for sectors on inner
tracks. This parameter is the track number on the disk
surface where write precompensation begins.
Landing Zone
This number is the cylinder location where the heads
normally park when the system is shut down.
Sectors
The number of sectors per track. MFM drives have 17
sectors per track. RLL drives have 26 sectors per
track. ESDI drives have 34 sectors per track. SCSI
and IDE drives have even more sectors per track.
Capacity
The formatted capacity of the drive is the number of
heads times the number of cylinders times the number
of sectors per track times 512 (bytes per sector).
