GPIO ports of the LEDs (on the it87 chip):
Numbers refer to [bank][pin], 20 is GPIO bank 2, pin 0.
20 power red led
34 usb led
47 status led
77 lan led
80 power blue led
Other GPIOs
45 panel power
81 lan power
83 lcd power
ICH GPIOs
offset 27: orange status led
Contents of /proc/asled:
######################################################
LED 0 Mode = 0x00000001
LED 0 Flag = 0x00000001
LED 0 Status = 0x00000000
LED 0 pActivity = 0xFFFFFFFF81C2E880
LED 0 HardwareType = 0x00000001
LED 0 Gpio = 0x00020000
LED 0 ActivityMsecs = 0x00000032
LED 0 BlinkMsecs = 0x00000032
######################################################
LED 1 Mode = 0x00000000
LED 1 Flag = 0x00000000
LED 1 Status = 0x00000000
LED 1 pActivity = 0x00000000
LED 1 HardwareType = 0x00000001
LED 1 Gpio = 0x00080000
LED 1 ActivityMsecs = 0x00000032
LED 1 BlinkMsecs = 0x00000032
######################################################
LED 2 Mode = 0x00000001
LED 2 Flag = 0x00000001
LED 2 Status = 0x00000000
LED 2 pActivity = 0xFFFFFFFF81C2E8A0
LED 2 HardwareType = 0x00000001
LED 2 Gpio = 0x00200000
LED 2 ActivityMsecs = 0x00000032
LED 2 BlinkMsecs = 0x00000032
######################################################
LED 3 Mode = 0x00000000
LED 3 Flag = 0x00000000
LED 3 Status = 0x00000000
LED 3 pActivity = 0x00000000
LED 3 HardwareType = 0x00000001
LED 3 Gpio = 0x00400000
LED 3 ActivityMsecs = 0x00000032
LED 3 BlinkMsecs = 0x00000032
######################################################
LED 4 Mode = 0x00000001
LED 4 Flag = 0x00000001
LED 4 Status = 0x00000000
LED 4 pActivity = 0xFFFFFFFF81C2E8C0
LED 4 HardwareType = 0x00000001
LED 4 Gpio = 0x00000020
LED 4 ActivityMsecs = 0x00000032
LED 4 BlinkMsecs = 0x00000032
######################################################
LED 5 Mode = 0x00000000
LED 5 Flag = 0x00000000
LED 5 Status = 0x00000000
LED 5 pActivity = 0x00000000
LED 5 HardwareType = 0x00000001
LED 5 Gpio = 0x00000040
LED 5 ActivityMsecs = 0x00000032
LED 5 BlinkMsecs = 0x00000032
######################################################
LED 6 Mode = 0x00000001
LED 6 Flag = 0x00000001
LED 6 Status = 0x00000000
LED 6 pActivity = 0xFFFFFFFF81C2E8E0
LED 6 HardwareType = 0x00000001
LED 6 Gpio = 0x00000080
LED 6 ActivityMsecs = 0x00000032
LED 6 BlinkMsecs = 0x00000032
######################################################
LED 7 Mode = 0x00000000
LED 7 Flag = 0x00000000
LED 7 Status = 0x00000000
LED 7 pActivity = 0x00000000
LED 7 HardwareType = 0x00000001
LED 7 Gpio = 0x00010000
LED 7 ActivityMsecs = 0x00000032
LED 7 BlinkMsecs = 0x00000032