INT 15 R - Advanced Power Management Spec - CONNECT 16-BIT PROTMODE INTERFACE
AX = 5302h
BX = 0000h (device ID of system BIOS)
Return: CF clear if successful
AX = real-mode segment base address of protected-mode 16-bit code
segment
BX = offset of entry point
CX = real-mode segment base address of protected-mode 16-bit data
segment
CF set on error
AH = error code (05h,06h,09h) (see AX=5300h)
Notes:  the caller must initialize two consecutive descriptors with the
returned segment base addresses; these descriptors must be valid
whenever the protected-mode interface is called, and will have
their limits arbitrarily set to 64K.
the protected mode interface is invoked by making a far call with the
same register values as for INT 15; it must be invoked while CPL=0,
the code segment descriptor must have a DPL of 0, the stack must be
in a 16-bit segment and have enough room for BIOS use and possible
interrupts, and the current I/O permission bit map must allow access
to the I/O ports used for power management.
functions 00h-03h are not available from protected mode
SeeAlso: AX=5303h,AX=5304h

See also: 155301

155302BX0000 - Advanced Power Management Spec - CONNECT 16-BIT PROTMODE INTERFACE