TYAN TOMCAT I915 User Manual page 44

Tomcat i915 S5120
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 interface supports. Modes 0 through 4 provide
successively increased performance. In Auto mode, the system automatically determines the
best mode for each device.
•
Auto
•
Mode 0 ~ Mode 4
Primary / Secondary Master / Slave UDMA
This option allows you to select the mode of operation for the Ultra DMA/33 implementation.
This is possible only if your IDE hard drive supports UDMA and the operating environment
includes a DMA driver (Windows 95 OSR2 or a third party IDE bus master driver). UDMA
(Ultra DMA) is advanced technology that provides for even faster throughput, up to 33.3 MB/s
in UDMA mode 2 and 66.7 MB/s in UDMA mode 4, twice to four times that of EIDE, for much
lower prices than SCSI. Many new computers come with large UDMA drives and UDMA
interfaces, and it's possible to add a UDMA interface card (such as the Promise Ultra33 or
Ultra66) to an existing system to boost speed, even on older non-UDMA drives. If your hard
drive and your system software both support Ultra DMA/33, select Auto to enable BIOS
support.
•
Auto
•
Disabled
On-Chip Secondary PCI IDE
Your system includes two built-in IDE controllers, both of which operate on the PCI bus. This
setup item allows you either to enable or disable the secondary controller. You might choose
to disable the controller if you were to add a higher performance or specialized controller.
•
Enabled
•
Disabled
On-Chip Serial ATA
This selects the mode for the On-Chip Serial ATA controller. The following are the modes.
•
Disabled: This disables the SATA controller.
•
Auto: This auto selects the correct mode for the SATA controller.
•
Combined Mode: This combines both PATA (Parallel ATA) and SATA. This allows
a maximum of 2 IDE drives in each channel.
•
Enhanced Mode: This enables both SATA as well as PATA and allows a maximum
of 6 IDE drives in each channel.
•
SATA Only: This operates SATA in legacy mode.
PATA IDE Mode
This enables the selected IDE controller in PATA mode (Parallel ATA mode).
•
Primary
•
Secondary
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Chapter 3: BIOS Setup