Tyan Computer InterServe 90 manual Type How to Configure

IDE Device Configuration: To have the BIOS autodetect the IDE drive, select Auto. Otherwise, you may choose one of the 46 drive types offered, or enter the parameters yourself (see Entering Drive Parameters on page 42). Consult the table below to see how to configure various drive types yourself.

Type	How to Configure
	Select Type. Select Not Installed on the drive parameter screen. The
SCSI	SCSI drivers provided by the SCSI manufacturer should allow you to
	configure the SCSI drive.
	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
	540MB.
	Select Block Mode. Select On to allow block mode data transfers.
IDE	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.
	(MFM drives are older IDEs which use an encoding scheme that
Standard MFM	produces slower data access and less storage room.) Select Type.
	You must know the drive parameters. Select the drive type that
	exactly matches your drive's parameters.
	Select Type. If the drive parameters do not match the drive
Non-Standard MFM	parameters listed for drive types 1-46, select User and enter the
	correct hard disk drive parameters.

LBA/Large Mode: These modes make it possible for the BIOS to take advan- tage of the additional space on drives which are larger than 504MB. This can be autodetected (when you select Auto for Type), or you can turn the modes On or Off yourself.

Block Mode: If On, Block Mode automatically detects the optimal number of block read/writes per sector that the drive can support.

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