82091AA Datasheet, PDF (146/204 Pages) Intel Corporation – ADVANCED INTEGRATED PERIPHERAL (AIP)

82091AA
8 5 1 3 Status Register 2
Bit Symbol
Name
7
6
CM
Control Mark
5
DD
4
WC
3
2
1
BC
Data Error in
Data Field
Wrong
Cylinder
Bad Cylinder
0
MD
Missing Data
Address Mark
Description
Unused This bit is always ‘‘0’’
Any one of the following
1 READ DATA command the 82078 encounters a deleted data
address mark
2 READ DELETED DATA command the 82078 encountered a data
address mark
The 82091AA detected a CRC error in the data field
The track address from the sector ID field is different from the track
address maintained inside the 82091AA
Unused This bit is always ‘‘0’’
Unused This bit is always ‘‘0’’
The track address from the sector ID field is different from the track
address maintained inside the 82091AA and is equal to FF hex
which indicates a bad track with a hard error according to the IBM
soft-sectored format
The 82091AA cannot detect a data address mark or a deleted data
address mark
8 5 1 4 Status Register 3
Bit
Symbol
Name
7
6
WP
Write Protected
5
4
T0
Track 0
3
2
HD
Head Address
10
DS1 0
Drive Select
Description
Unused This bit is always ‘‘0’’
Indicates the status of the WP pin
Unused This bit is always ‘‘0’’
Indicates the status of the TRK0 pin
Unused This bit is always ‘‘0’’
Indicates the status of the HDSEL pin
Indicates the status of the DS1 DS0 pins
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