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2F1980

Category: no classification
Flags: Undocumented function

INT 2F - IBM ROM-DOS v4.0 - INSTALLATION CHECK

	AX = 1980h
Return: AL = FFh if ??? installed/supported
Note:	called at the very beginning of SHELLSTB.COM, which exits if AL is not
	  FFh on return
SeeAlso: AX=1981h,AX=1982h

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