Maxtor 91792D7, 91024D4, 90750D3, 91280D5, 91536D6, 92048D8 manual 15-8 = PIO data transfer mode

INTERFACE COMMANDS

WORD	CONTENT DESCRIPTION
50	Reserved
51	15-8 = PIO data transfer mode
	7-0 = not used
52	15-8 = DMA data transfer mode
	7-0 = not used
53	15 = reserved
	2, 1 = the fields supported in words 88 are valid, 0 = the fields supported in words 88 are not valid
	1, 1 = the fields reports in words 64-70 are valid, 0 = the fields reports in words 64-70 are not valid
	0, 1 = the fields reports in words 54-58 are valid, 0 = the fields reports in words 54-58 are not valid
54	Number of current logical cylinders
55	Number of current logical heads
56	Number of logical sectors per track
57 - 58	Current capacity in sectors
59	15-9 = reserved
	8, 1 = multiple sector setting is valid
	7-0xxh = current setting for number of sectors that can per transferred per interrupt on Read/Write Multiple
	command
60 - 61	Total number of user addressable sectors (LBA mode only)
62	Reserved
63	15-8 = Multi-word DMA transfer mode active
	7-0 = Multi=word DMA transfer modes supported
64	15-8 = reserved
	7-0 = advanced PIO transfer modes supported
65	Minimum multi-word DMA transfer cycle time (15-0 = cycle time in nanoseconds)
66	Manufacturer's recommeded multi-word DMA transfer cycle time (15-0 = cycle time in nanoseconds)
67	Minimum PIO transfer cycle time without flow control (15-0 = cycle time in nanoseconds)
68	Minimum PIO transfer cycle time with IORDY flow control (15-0 = cycle time in nanoseconds)
69-79	Reserved
80	15-5 = reserved
	4, 1 = supports ATA-4
	3, 1 = supports ATA-3
	2, 1 = supports ATA-2
	1, 1 = supports ATA-1
	0, reserved
81	Minor version number
82	Command set supported. If words 82 and 83 = 0000h or FFFFh command set notification not supported.
	15, 1 = supports the Identify Device DMA command
	14, 1 = supports the NOP command
	13, 1 = supports the Write Buffer command
	12, 1 = supports the Read Buffer command
	11, 1 = supports the Read Buffer command
	10, 1 = supports Host-Protected Area feature set
	9, 1 = supports the Device Reset command
	8, 1 = supports Service Interupt
	7, 1 = supports Release Interupt
	6, 1 = supports Look Ahead
	5, 1 = supports Write Cache
	4, 1 = supports the Packet command feature set
	3, 1 = supports the Power Management feature command
	2, 1 = supports the Removable feature command
	1, 1 = supports the Security featurecommand
	0, 1 = supports the SMART feature set

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