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3 Chapter 1
1.2 Features
1. High performance PCI bus: The PCA-6185 provides three inde-
pendent PCI buses: one 32-bit, 33 MHz PCI bus and two 64-bit
PCI-X buses. The 32-bit bus is used for on-board VGA controller.
One of the two high performance PCI-X bus is used for onboard
Gigabit Ethernet and SCSI controllers. The other PCI-X bus is
available for user's add-on cards through the edge connector. This
PCI-X bus is compatible with PCI bus and capable to operate at dif-
ferent speed: 32-bit/33 MHz, 32-bit/66MHz, 64-bit/33 MHz or 64-
bit/66 MHz.
2. Fan status monitoring and alarm: To prevent system overheating
and damage, the CPU fan can be monitored for speed and failure.
The fan is set for its normal RPM range and alarm thresholds.
3. Temperature monitoring and alarm: To prevent system over-
heating and damage, the CPU card supports processor thermal
sensing and auto-protection.
4. Voltage monitoring and alarm: System voltage levels are moni-
tored to ensure stable current flows to critical components. Voltage
specifications will become even more critical for processors of the
future. Thus monitoring will become ever more necessary to ensure
proper system configuration and management.
5. ATX soft power switch: Through the BIOS, the power button can
be defined as the "Standby" (aka "Suspend" or "Sleep") button or as
the "Soft-Off" button (see Soft-off by PWR-BTN, Setion 3.7.8)
Regardless of the setting, pushing the power button for more than 4
seconds will enter the Soft-Off mode.
6. Message LED: Chassis LEDs now act as information providers.
The way a particular LED illuminates indicates the stage the com-
puter is in. A single glimpse provides useful information to the
user.
7. CMOS RAM backup: When BIOS CMOS setup has been com-
pleted, data in the CMOS RAM is automatically backed up to the
Flash ROM. This is particularly useful in industrial environments
which may cause soft errors. Upon such an error occurring, BIOS
will check the data, and automatically restore the original data for
booting.