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AT INTERFACE and ATA COMMANDS
WA31273A / WA32543A / WA33203A / WA32163A / WA31083A / WA32162A 6-27
Table 6-6.
Identify Drive Information (continued)
Word
Description
23-26
Firmware revision (8 ASCII characters)
27-46
Model number (40 ASCII characters)
47
15-8 vendor specific
7-0 00h = READ/WRITE MULTIPLE commands not implemented
01h-FEh = Maximum number of sectors that can be transferred
per interrupt per interrupt on READ MULTIPLE and WRITE
MULTIPLE commands
48
Reserved
49
Capabilities
15-14 Reserved
13 1=Standby time values as specified in this standard are
supported
0=Standby timer values are vendor specific
12 Reserved (for advanced PIO mode support)
11 1=IORDY supported
0=IORDY may be supported
10 1=IORDY can be disabled
9 1=LBA supported
8 1=DMA supported
7-0 Vendor specific
50
Reserved
51
15-8 PIO data transfer cycle timing mode
7-0 Vendor specific
52
15-8 DMA data transfer cycle timing mode
7-0 Vendor specific
53
15-2 Reserved
1 1 = the fields reported in words 64-70 are valid
0 = the fields reported in words 64-70 are not valid
0 1 = the fields reported in words 54-58 are valid
0 = the fields reported in words 54-58 may be valid
54
Number of current logical cylinders