Maxtor 2B020H1 Product Manual page 51

-W OR D CONT ENT DESC RIPTION
50 Reserved
51 - 52 Obsolete
53 15 -3 = reserved
2, 1 = the fi elds supported i n words 88 are vali d, 0 = the fields supported in words 88 are not vali d
1, 1 = the fi elds reports in words 64-70 are vali d, 0 = the fields reports i n words 64-70 are not vali d
0, 1 = the fi elds reports in words 54-58 are vali d, 0 = the fields reports i n words 54-58 are not vali d
54 Number of current logi cal cyli nders
55 Number of current logi cal heads
56 Number of l ogi cal sectors per track
57 - 58 C urrent capaci ty in sectors
59 15-9 = reserved
8, 1 = multi ple sector setti ng i s vali d
7-0 xxh = current setting for number of sectors that c anbe transferred per interrupt on Read/Write Multiple
command
60 - 61 Total number of user addressable sectors (LBA mode only)
62 obsolete
63 15-11 = reserved
10, 1 = Multi -word D MA mode 2 i s selec ted, 0 = Multi -word D MA mode 2 is not selected
9, 1 = Multi -word D MA mode 1 i s selec ted, 0 = Multi -word D MA mode 1 is not selected
8, 1 = Multi -word D MA mode 0 i s selec ted, 0 = Multi -word D MA mode 0 is not selected
7-3, = reserved
2, 1 = Multi -word D MA mode 2 and below are supported
1, 1 = Multi -word D MA mode 1 and below are supported
0, 1 = Multi -word D MA mode 0 i s supported
7-0 = Multi =word DMA transfer modes supported
64 15-8 = reserved, 7-0 = advanced PIO transfer modes supported
65 Mi ni mum multi -word D MA transfer cycle ti me per word (15-0 = cycle time i n nanoseconds )
66 Manufacturer's recommeded multi-word DMA transfer cycle ti me (15-0 = cycle time in nanoseconds )
67 Mi ni mum PIO transfer cycle time without flow control (15-0 = cycle ti me i n nanoseconds )
68 Mi ni mum PIO transfer cycle time wi th IORDY flow control (15-0 = cycle ti me in nanoseconds )
69-74 reserved
75 Queue depth, 15 -3 = reserved, 4-0, maxi mum queue depth - 1
76-79 reserved
80 Maj or version number
15, reserved, 14-6 = reserved for ATA/ATAPI-14 to ATA/ATAPI-6 respecti vely
5, 1 = supports ATA/ATAPI-5
4, 1 = supports ATA/ATAPI-4
3, 1 = supports ATA-3
2, 1 = supports ATA-2
1, obsolete
0, reserved
81 Minor version number
82 C ommand set supported. If words 82 and 83 = 0000h or FFF Fh c ommand set noti fic ati on not supported.
15, obsolete
14, 1 = supports the NOP command
13, 1 = supports the Read Buffer command
12, 1 = supports the Write Buffer command
11, obsolete
10, 1 = supports Host-Protected Area feature set
9, 1 = supports the Device Res et command
8, 1 = supports Servi ce Interupt
7, 1 = s upports Release Interupt
6, 1 = supports Look Ahead
5, 1 = s upports Wri te Cache
4, shal l be cleared to zero
3, 1 = s upports the Power M anagement feature command
2, 1 = s upports the Removable Medi a feature command
1, 1 = s upports the Securi ty Mode feature command
0, 1 = supports the SMART feature set
INTERFACE COMMANDS
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