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24
Word
Description
Number of sectors per
56
track
(current emulation mode)
Number of sectors
57–58
(current emulation mode)
Number of sectors
transferred during a Read
59
Multiple or Write Multiple
command (bits 1–7)
60–61 ATA reserved
Single-word DMA
62
active/modes supported*
Multiword DMA
63
active/modes supported*
Advanced PIO modes
64
supported (mode 3
supported)
Minimum multiword DMA
65
transfer cycle time per
word (150 nsec)
Recommended multiword
66
DMA transfer cycle time
per word (250 nsec)
Minimum PIO cycle time
67
without IORDY flow
control (363 nsec)
Minimum PIO cycle time
68
with IORDY flow control
(nsec)
64–127 ATA reserved
128–159 Seagate reserved
160–255 ATA reserved
ST9655 Family Product Manual, Rev. A
ST9655AG
ST9550AG
xxxx
xxxx
H
H
xxxx
xxxx
H
H
01 xx
01 xx
H
H
0000
0000
H
H
0 x 07
0 x 07
H
H
0 x 03
0 x 03
H
H
0001
0001
H
H
0096
0096
H
H
00FA
00FA
H
H
016B
016B
H
H
00B4
00FA
H
H
0000
0000
H
H
xxxx
xxxx
H
H
0000
0000
H
H
ST9385AG
xxxx
H
xxxx
H
01 xx
H
0000
H
0 x 07
H
0 x 03
H
0001
H
0096
H
00FA
H
016B
H
00FA
H
0000
H
xxxx
H
0000
H
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