MSI 865GM3 manual IDE DMA Transfer Access, On-Chip Primary/Secondary PCI IDE

MS-6763 M-ATX Mainboard

IDE DMA Transfer Access

This setting is used to enable or disable the DMA transfer function of IDE hard drives under certain operating systems that do not support IDE drivers, ex: DOS. Setting options: Enabled, Disabled.

On-Chip Primary/Secondary PCI IDE

The integrated peripheral controller contains an IDE interface with sup- port for two IDE channels. Choose Enabled to activate each channel separately.

IDE Primary/Secondary Master/Slave PIO

The four IDE PIO (Programmed Input/Output) fields let you set a PIO mode (0-4) for each of the four IDE devices that the onboard IDE inter- face supports. Modes 0 through 4 provide successively increased performance. In Auto mode, the system automatically determines the best mode for each device. The settings are: Auto, Mode 0, Mode 1, Mode 2, Mode 3, Mode 4.

IDE Primary/Secondary Master/Slave UDMA

Ultra DMA/33 implementation is possible only if your IDE hard drive supports it and the operating environment includes a DMA driver (Windows 95 OSR2 or a third-party IDE bus master driver). If your hard drive and your system software both support Ultra DMA/33, Ultra DMA/ 66 and Ultra DMA/100, select Auto to enable BIOS support. The settings are: Auto, Disabled.

**On-Chip Serial ATA Setting** On-Chip Serial ATA

This setting controls the Serial ATA controller on the south bridge. Options: Disabled, Auto, Legacy Mode, Native Mode. When set to Disabled, the SATA controller will be disabled. When set to Auto, the SATA controller will be automatically controlled by the BIOS. When set to Legacy Mode, the PATA & SATA controllers are combined to sup- port a maximum of 2 IDE drives in each channel. When set to Native Mode, both SATA and PATA controllers are enabled to support a maxi- mum of 6 IDE drives (The support of 6 IDE drives depends on the oper- ating system installed. Currently only Windows 2000 & Windows XP support this function.)

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