ATA Bus Interface and ATA Commands
5-8
Quickview 300
80/100/120/160/200/250/300GB PATA
53 15-3:
Reserved
2:
1 = the fields reported in word 88 are valid.
0 = the fields reported in word 88 are not valid
1:
1 = the fields reported in words (70:64) are valid.
0 = the fields reported in words (70:64) are not valid
0:
Obsolete
54-58 Obsolete
59
15-9:
Reserved
8:
1 = Multiple sector setting is valid
7-0:
xxh = Current setting for number of sectors that shall be transferred per
interrupt on R/W Multiple command
60-61
Total number of user addressable sectors
62 Obsolete
63 15-11: Reserved
10:
1 = Multiword DMA mode 2 is selected.
0 = Multiword DMA mode 2 is not selected
9:
1 = Multiword DMA mode 1 is selected.
0 = Multiword DMA mode 1 is not selected
8:
1 = Multiword DMA mode 0 is selected.
0 = Multiword DMA mode 0 is not selected
7-3:
Reserved
2:
1 = Multiword DMA mode 2 and below are supported
1:
1 = Multiword DMA mode 1 and below are supported
0:
1 = Multiword DMA mode 0 is supported
64 15-8:
Reserved
7-0:
PIO modes supported
65
Minimum Multiword DMA transfer cycle time per word
15-0:
Cycle time in nanoseconds
66
Manufacturer’s recommended Multiword DMA transfer cycle time
15-0:
Cycle time in nanoseconds
Table 5-2
Identify Drive Command Parameters
Word
CONTENT DESCRIPTION