Chapter 1: Product Overview 1-17
Power LED
The Processor Board provides support for an external power LED
through the onboard Motion/Power LED connector. This LED is
controlled through the SMC 37C935 GPIO pins. Once the SMC chip is
programmed to support the Power LED function on GPIO pin 13, the
LED is turned “on” anytime all power to the Processor Board is good.
The system’s power management software has the option to turn the
LED off indicating the system is in a power-managed mode.
MSR
The MSR interface supports a maximum of 3 tracks of magnetic stripe
information for support of ISO format cards. Activate the MSR
interface by enabling it in BIOS Setup under IO Configuration. The
MSR interface controller is a memory-mapped device, which can reside
at system memory addresses CA000, CC000, or D0000. If MSR
capability is not desired, it may be disabled through BIOS Setup.
Graphics Subsystem
The Celeron Processor Board is equipped with a SMI Lynx SVGA
LCD/CRT 3DM graphics controller with 8 MB of integrated
synchronous graphics DRAM.
The Processor Board supports linear addressing by creating a “hole” in
the memory address space at the 63 MB boundary. When the system is
configured for 64 MB and linear addressing is enabled, the last 1 MB of
system memory is unusable; therefore, the board will report that total
available system memory is 63 MB.
Because a hole in memory creates a non-contiguous address space,
enabling linear addressing when total system DRAM is greater than 64
MB is not recommended. Video linear addressing is enabled through
PC Setup under the Integrated Peripherals menu.
The processor also supports VESA standards such as the VESA DPMS
protocol to place a DPMS compliant monitor into power savings
modes.
Pentium III Processor Boards are equipped with Lynx 3DM chips that
support three-dimensional graphics capability.
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