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21E400

Category: DOS-based task switchers/multitaskers

INT 21 - DoubleDOS - INSTALLATION CHECK/PROGRAM STATUS

	AX = E400h
Return: AL = program status
	    00h if DoubleDOS not present
	    01h if running in visible DoubleDOS partition
	    02h if running in the invisible DoubleDOS partition
SeeAlso: AH=E5h"DoubleDOS",AX=F400h

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  Copyright 2000   by Ralf Brown     Updated Jul 2000