Fujitsu MHY2040BS, MHY2160BS, MHY2200BS = Enables the read cache function. From the SET Features

Interface

Bit 6:	'1' = Enables the read cache function. From the SET FEATURES
		command
Bit 5:	'1' = Enables the write cache function.
Bit 4:	'1' = Enables the P PACKET command set.
Bit 3:	'1' = Supports the Power Management function.
Bit 2:	'1' = Supports the Removable Media function.
Bit 1:	'1' = From the SECURITY SET PASSWORD command
Bit 0:	'1' = From the SMART ENABLE OPERATION command
*20 WORD 86
Bit 15:	'1' = The values in WORD119-120 are valid.
Bit 14:	Reserved
Bits 13-10:	Same definition as WORD 83.
Bit 9:	'1' = Enables the Automatic Acoustic Management function from
		the SET FEATURES command
Bit 8:	'1' = From the SET MAX SET PASSWORD command
Bits 7-6:	Same definition as WORD 83.
Bit 5:	'1' = Enables the Power-Up In Standby function.
Bit 4:	'1' = Enables the Removable Media Status Notification function.
Bit 3:	'1' = Enables the Advanced Power Management function.
Bits 2-0:	Same definition as WORD 83.
*21 WORD 87
Bit 15:	= 0	The device always returns the fixed value indicated on the left.
Bit 14:	= 1	The device always returns the fixed value indicated on the left.
Bits 13-0:	Same definition as WORD 84.
*22 WORD 88
Bit 15-8:	Currently used Ultra DMA transfer mode
Bit 14:	'1' = Mode 6 is selected.
Bit 13:	'1' = Mode 5 is selected.
Bit 12:	'1' = Mode 4 is selected.
Bit 11:	'1' = Mode 3 is selected.

5-114 C141-E269