Category: <b>virus/antivirus</b>
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<pre><b>INT 21 - VIRUS - "Crazy Imp" - INSTALLATION CHECK</b>

	AX = 0D20h
Return: AX = 1971h if resident
SeeAlso: AX=0B56h,AX=1812h,AX=2C2Ch,AX=710Dh,AH=30h/DX=ABCDh
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