ATA Bus Interface and ATA Commands
5-6
Quickview 40 20/30/40GB AT
20-21
Retired
22 Obsolete
23-26
Firmware revision (8 ASCII characters)
27-46
Model number (40 ASCII characters)
47 15-8:
80h
7-0:
00h = Reserved
01h-FFh: = Maximum number of sectors that shall be transferred per interrupt on
READ/WRITE MULTIPLE commands
48 Reserved
49
Capabilities
15-14: Reserved for the IDENTIFY PACKET DEVICE command.
13:
1 = Standby timer values as specified in this standard are supported.
0 = Standby timer values shall be managed by the device
12:
Reserved for the IDENTIFY PACKET DEVICE command.
11:
1 = IORDY supported. 0 = IORDY may be supported
10:
1 = IORDY may be disabled
9:
1 = LBA supported
8:
1 = DMA supported.
7-0:
Retired
50 Capabilities
15:
Shall be cleared to zero.
14:
Shall be set to one.
13-2:
Reserved.
1:
Obsolete
0:
Shall be set to one to indicate a device specific Standby timer value
minimum.
51-52
Obsolete
Table 5-2
Identify Drive Command Parameters
Word
CONTENT DESCRIPTION