IBM CI5VGM Series Integrated Peripherals, OnChip IDE First/Second Channel, IDE Prefetch Mode

Chapter 3 BIOS Configuration

Integrated Peripherals

This option sets your hard disk configuration, mode and port.

ROM PCI/ISA BIOS

INTEGRATED PERIPHERALSP

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OnChip IDE First Channel	: Enabled	Onboard FDD Controller		: Enabled
OnChip IDE Second Channel	: Enabled	Onboard Serial Port 1		: 3F8/IRQ4
IDE HDD Block Mode	: Disabled	Onboard Serial Port 2		:
IDE Prefetch Mode	: Enabled	UART 2 Mode		:
IDE HDD Block Mode	: Auto
IDE Primary Master PIO	: Auto
IDE Primary Slave PIO	: Auto	Onboard Parallel Port		: 378/IRQ7
IDE Secondary Master PIO	: Auto	Parallel Port Mode		: SPP
IDE Secondary Slave PIO	: Auto
IDE Primary Master UDMA	: Auto
IDE Primary Slave UDMA	: Auto
IDE Secondary Master UDMA	: Auto
IDE Secondary Slave UDMA	: Auto
Init AGP Display First	: AGP
Onboard Audio Chip	: Enabled
		ESC : Quit	Ç È Å : Select Item
		F1 : Help	PU/PD/+/- : Modify
		F5 : Old Values	(Shift) F2 : Color
		F6 : Load BIOS Defaults
		F7 : Load Setup Defaults

OnChip IDE First/Second Channel

The integrated peripheral controller contains an IDE interface with support for two IDE channels. Select Enabled to activate each channel separately.

IDE Prefetch Mode

This field allows your hard disk to prefetch the next read and initiate the next process.

IDE HDD Block Mode

This field allows your hard disk controller to use the fast block mode to transfer data to and from your hard disk drive.

IDE Primary/Secondary Master/Slave PIO

These fields allow your system hard disk controller to work faster. Rather than have the BIOS issue a series of commands that transfer to or from the disk drive, PIO (Programmed Input/Output) allows the BIOS to communicate with the controller and CPU directly.

The system supports five modes, numbered from 0 (default) to 4, which primarily differ in timing. When Auto is selected, the BIOS will select the best available mode.

60 CI5VGM User’s Manual