Maxtor 5T040H4 - Manual (Page 51)

INTERFACE COMMANDS
7 – 10
Initialization Commands Initialization Commands Initialization Commands Initialization Commands Initialization Commands
Identify Drive Identify Drive Identify Drive Identify Drive Identify Drive
Allows the host to receive parameter information from the drive.
When the command is received, the drive:
1. Sets BSY,
2. Stores the required parameter information in the sector buffer,
3. Sets the DRQ bit and
4. Generates an interrupt.
The host may then read the information out of the sector buffer. Parameter words in the buffer follow.
Note that all reserved bits or words should be zeroes.
W OR D CONT ENT DESC RIPTION
0 Gener al configur atio n
15 = devi ce (0 = ATA de vice, 1 = ATAPI)
14 -8 = reti r ed
7, 1 = removab le media d evi ce
6, 1 = not r emovabl e con tr olle r a nd/or devi ce
5-3 = r etir ed
2 = resp onse i nco mplete
1 = r eti red
0 = reserved
1 Numb er of log ica l cylinder s
2 Rese rved
3 Number of lo gica l h eads
4-5 Retir ed
6 Numb er of l og ica l secto rs pe r logic al tra ck
7-8 Rese rved
9 Retir ed
10 - 19 Dr i ve seri al n umber (20 ASCII char acters )
20 - 21 Retir ed
22 Obsolete
23 - 26 F irmwa re re vision (8 ASCII char acters )
27 - 46 Mode l number (40 ASCII cha r acters )
47 Maxi mum number o f sectors th at c an be tr ansfer re d p er i nter rup t o n re ad and wr ite mul ti ple command s
48 Rese rved
49 C apa bili ti es
15 - 14 = reserved
13 = s tandb y time r (1 = val ues a s speci fie d in thi s s ta nda rd a re s upp orted , 0 = va lue s ar e Maxtor specific )
12 = r e ser ve d ( ad vanc ed PIO mode suppor t)
11 , 1 = IORD Y supp or ted , 0 = IORDY may b e supp orted
10 , 1 = IORDY can be di sabl ed
9-8 = shall be se t to one. Us ed by Id entify Packe t Device comm and .
7-0 = no t us ed