Specifications

Chapter 2-26
Command set 50h-5Fh for OEM defined through Port60/64 and Port62/66
Command Set (from system's point of view) via 60/64 and 62/66
CMD DATA Description return
50h None Get Docking status. A0h = No dock
A6h = simple docked
51h None Get revision number of KB-BIOS BIOS Rev. 3 bytes
byte0 :
bit0-bit2 = major number(0-
7)
bit3-bit7 = type of KB-BIOS
e.g. 0 = A, 1=B and so on..
byte1
minor revision number(0-9)
byte2
If it is 00h then system
display “ROM”,other It is
“T01” if it is 01h and so
on.. .
52h None Hook for every projects(Get platform ID) 5Bytes “ACY25”
53h None Reserved None
54h 0x00-0xFF EC CMOS RAM read Data byte from CMOS
55h EC CMOS RAM write
0x00-0xFF CMOS address offset
0x00-0xFF data byte 0x00 => pass
0x01 => fail
56h Get SMI trigger source One byte
Battery status change 80h
Ask suspend(On mode) A0h
brightness level update A1h
contrast level update A2h
audio volume decreased A3h
audio volume increased A4h
Lid open A5h
Lid closed A6h
External device plugged A7h
External device removed A8h