Specifications

AMD Geode™ GeodeROM Functional Specification 93
Human Interface Device Support
32087C
10.1.8 Function 12h - Get Extended Shift Status
Description:
Returns the state of the Left Shift, Right Shift, Ctrl, and Alt keys. It also indicates the state of the ScrollLock,
NumLock, CapsLock, and Insert keys. Additionally, the states of other keys are returned.
Passed:
Returns:
Related Functions:
INT 16h "Function 02h - Get Shift Status" on page 90.
10.2 PS/2 Pointing Device Support
None.
Parameter Description
AH 12h
Parameter Description
AL Shift flags:
Bit 7 = Ins active
Bit 6 = CapsLock active
Bit 5 = NumLock active
Bit 4 = ScrollLock active
Bit 3 = Either ALT key depressed
Bit 2 = Either CTRL key depressed
Bit 1 = Left Shift key depressed
Bit 0 = Right Shift key depressed
AH Additional shift flag information:
Bit 7 = SysReq key depressed
Bit 6 = CapsLock key depressed
Bit 5 = NumLock key depressed
Bit 4 = ScrollLock key depressed
Bit 3 = Right Alt key depressed
Bit 2 = Right Ctrl key depressed
Bit 1 = Left Alt key depressed
Bit 0 = Left Ctrl key depressed