Category: expansion bus BIOSes

INT 15 - Intel System Management Bus - REAL MODE CONNECT

	AX = 53B0h
	BH = 02h
	CX = 6941h ('iA')
Return: CF clear if successful
	    AX = SMBus Real mode code segment
	    BX = offset of entry point into SMBus BIOS Interface
	    CX = SMBus Real mode data segment
	CF set if error
	    AH = error code (01h,02h,0Ah,86h) (see #00484)
	    AL = sub-error code if error code is 02h (see #00485)
Desc:	connect to SMBus interface; once connected, all SMBus calls are made
	  to the supplied entry point instead of INT 15 (with registers
	  identical to those described here for INT 15)
Notes:	Support for this function is optional
	this function is only supported in INT 15 mode when implemented
SeeAlso: AX=53B0h/BH=01h,AX=53B0h/BH=03h,AX=53B0h/BH=04h,AX=53B0h/BH=05h