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155302

Category: power management
Flags: available only in real or V86 mode

INT 15 - Advanced Power Management v1.0+ - CONNECT 16-BIT PROTMODE INTERFACE

	AX = 5302h
	BX = device ID of system BIOS (0000h)
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
	    ---APM v1.1---
	    SI = APM BIOS code segment length
	    DI = APM BIOS data segment length
	CF set on error
	    AH = error code (02h,05h,06h,07h,09h) (see #00473)
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
	on connection, an APM v1.1 or v1.2 BIOS switches to APM v1.0
	  compatibility mode until it is informed that the user supports a
	  newer version of APM (see AX=530Eh)
SeeAlso: AX=5301h,AX=5303h,AX=5304h

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  Copyright 2000   by Ralf Brown     Updated Jul 2000