PC87307VUL National Semiconductor, PC87307VUL Datasheet - Page 98
PC87307VUL
Manufacturer Part Number
PC87307VUL
Description
PC87307/PC97307 Plug and Play Compatible and PC97 Compliant SuperI/O
Manufacturer
National Semiconductor
Datasheet
1.PC87307VUL.pdf
(218 pages)
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Result Phase
Upon terminating the execution phase of the READ DATA
command, the controller asserts IRQ6, indicating the begin-
ning of the result phase. The microprocessor must then
read the result bytes from the FIFO.
The values that are read back in the result bytes are shown
in Table 5-18. If an error occurs, the result bytes indicate the
sector read when the error occurred.
Multi-Track
7
a. End of Track sector number from the command phase.
b. The number of the sector last operated on by controller.
c. Track number programmed in the command phase
(MT)
0
0
0
0
1
1
1
1
Result Phase Status Register 0 (ST0)
Result Phase Status Register 1 (ST1)
Result Phase Status Register 2 (ST2)
6
5
Bytes-Per-Sector Code
Head #
(HD)
0
0
1
1
0
0
1
1
Sector Number
Track Number
Head Number
4
TABLE 5-18. Result Phase Termination Values with No Error
End of Track (EOT)
< EOT
= EOT
< EOT
= EOT
< EOT
= EOT
< EOT
= EOT
Sector Number
3
a
a
a
a
a
a
a
a
Sector #
Sector #
Sector #
Sector #
Sector #
Sector #
Sector #
Sector #
2
1
Track Number Head Number Sector Number
Track
Track
Track
No Change
No Change
No Change
No Change
No Change
0
c
c
c
98
# + 1
# + 1
# + 1
5.7.11 The READ DELETED DATA Command
The READ DELETED DATA command reads logical sec-
tors containing a Address Mark (AM) for deleted data from
the selected drive and makes the data available to the host
microprocessor.
This command is like the READ DATA command, except for
the setting of the Control Mark bit (bit 6) in ST2 and the skip-
ping of sectors. See description of execution phase.
Command Phase
See READ DATA command for a description of the com-
mand bytes.
Execution Phase
Data read from disk drive is transferred to the system in
DMA or non-DMA modes. See Section 5.4.2 on page 78.
The effect of Skip Control (SK) on the READ DELETED
DATA command is summarized in Table 5-19.
IPS
MT
7
No Change
No Change
No Change
No Change
No Change
No Change
ID Information in Result Phase
MFM
X
6
1
0
End of Track (EOT) Sector Number
Bytes Between Sectors - Gap 3
SK
X
Data Length (Obsolete)
5
Bytes-Per-Sector Code
Sector
Sector
Sector
Sector
Sector Number
Track Number
Head Number
X
4
0
1
1
1
1
b
b
b
b
# + 1
# + 1
# + 1
# + 1
X
3
1
Bytes-per-Sector
HD
2
1
No Change
No Change
No Change
No Change
No Change
No Change
No Change
No Change
Code
DS1
1
0
DS0
0
0
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