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2F4308

Category: memory management
Flags: Undocumented function

INT 2F - HIMEM.SYS v2.77+ - GET A20 HANDLER NUMBER

	AX = 4308h
Return: AL = 43h if supported
	    BL = A20 handler number (value of /MACHINE:nn switch)
	    BH = AT A20 switch time (00h medium, 01h fast, 02h slow)
Note:	if the A20 handler number returned in BL is 00h, an external handler
	  is being used (see AX=4330h)
SeeAlso: AX=4309h,AX=4330h

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