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211D

Category: DOS kernel 

INT 21 - DOS 1+ - NULL FUNCTION FOR CP/M COMPATIBILITY

	AH = 1Dh
Return: AL = 00h
Note:	corresponds to the CP/M BDOS function "get bit map of read-only
	  drives", which is meaningless under MS-DOS
SeeAlso: AH=18h,AH=1Eh,AH=20h,AX=4459h

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