Fujitsu MJA2080BH, Product/Maintenance Manual

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Interface
5-114 C141-E293
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.