Category: power management

INT 15 - Advanced Power Management v1.0+ - INSTALLATION CHECK

	AX = 5300h
	BX = device ID of system BIOS (0000h)
Return: CF clear if successful
	    AH = major version (BCD)
	    AL = minor version (BCD)
	    BX = 504Dh ("PM")
	    CX = flags (see #00472)
	CF set on error
	    AH = error code (06h,09h,86h) (see #00473)
BUG:	early versions of the Award Modular BIOS with built-in APM support
	  reportedly do not set BX on return