www.delorie.com/djgpp/doc/rbinter/40.html   search  
21F400

Category: DOS-based task switchers/multitaskers

INT 21 - DoubleDOS - INSTALLATION CHECK/PROGRAM STATUS

	AX = F400h
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: AX=E400h,AH=F5h"DoubleDOS"

  webmaster   donations   bookstore     delorie software   privacy  
  Copyright 2000   by Ralf Brown     Updated Jul 2000