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Chapter 2: 7401-4xxx Product Overview 2-15
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 will be 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.
Graphics Subsystem
The 7401-45xx processor boards are equipped with a SMI Lynx SVGA
LCD/CRT 3DM graphics controller with 8 MB of integrated
synchronous graphics DRAM. The 7401-46xx processor boards have an
SMI Lynx 3DM/3DM+ graphics controller.
The processor boards support 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.
Resolutions Supported
Resolution Colors Max Vfreq
800x600x8bpp 256 85 Hz
800x600x16bpp 64 k 85 Hz
800x600x24bpp 16 M 85 Hz