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Table 271

Bitfields for IBM/MS INT 13 Extensions API support bitmap:
Bit(s)	Description	)
 0	extended disk access functions (AH=42h-44h,47h,48h) supported
 1	removable drive controller functions (AH=45h,46h,48h,49h,INT 15/AH=52h)
	  supported
 2	enhanced disk drive (EDD) functions (AH=48h,AH=4Eh) supported
	extended drive parameter table is valid (see #00273,#00278)
 3-15	reserved (0)

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