Chapter 1: Product Overview 1-19Power LEDThe Processor Board provides support for an external power LEDthrough the onboard Motion/Power LED connector. This LED iscontrolled through the SMC 37C935 GPIO pins. Once the SMC chip isprogrammed to support the Power LED function on GPIO pin 13, theLED is turned “on” anytime all power to the Processor Board is good.The system’s power management software has the option to turn theLED off indicating the system is in a power‐managed mode.MSRThe MSR interface supports a maximum of 3 tracks of magnetic stripeinformation for support of ISO or JIS format cards. Activate the MSRinterface by enabling it in BIOS Setup under IO Configuration. TheMSR interface controller is a memory‐mapped device, which can resideat system memory addresses CA000, CC000, or D0000. If MSRcapability is not desired, it may be disabled through BIOS Setup.Board BIOSThe Processor Board uses a Phoenix BIOS, which is stored in FlashROM and easily upgraded through the network connection or serialport. The Flash EEPROM also contains the Setup utility, Power‐On SelfTests (POST), and APM 1.2. The board also supports system BIOSshadowing, which enables the BIOS to execute from onboard write‐protected DRAM.The BIOS displays a sign‐on message during POST identifying the typeof BIOS and a five‐digit revision code.
