)
Call APIX protected-mode entry point with:
	AH = function number
	    00h get APIX version
		Return: CF clear
			AH = major version
			AL = minor version
	    01h ???
		Return: CF clear
			AX = number of ???
	    02h NOP
		Return: CF clear
	    03h ???
		Return: CF clear
			AX = 0000h/FFFFh
	    else
		Return: CF clear (bug?)
SeeAlso: #02661,#02666