Category: <b>virus/antivirus</b>
<p>
<pre><b>INT 21 - VIRUS - "Sunday", "Tumen 0.5", "Hero" - INSTALLATION CHECK</b>

	AH = FFh
Return: AH = 00h if "Tumen 0.5" or "Hero" resident
	AX = 0400h if "Sunday" resident
SeeAlso: AX=FEDCh"VIRUS",AX=FF01h"VIRUS"
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