dp8473 National Semiconductor Corporation, dp8473 Datasheet - Page 14

• Manufacturer Part Number: dp8473
• Description: Dp8473 Floppy Disk Controller Plus-2
• Manufacturer: National Semiconductor Corporation

Command Description Table
READ DELETED DATA
Command Phase
Result Phase
READ A TRACK
Command Phase
Result Phase
MT MFM SK
IPS
IPS
0
MFM SK
X
X
End of Track Sector Number
End of Track Sector Number
Number of Bytes per Sector
Number of Bytes per Sector
Intersector Gap Length
Intersector Gap Length
Drive Head Number
Drive Head Number
X
X
Status Register 0
Status Register 1
Status Register 2
Status Register 0
Status Register 1
Status Register 2
Sector Number
Sector Number
Sector Number
Sector Number
Track Number
Track Number
Track Number
Track Number
Head Number
Head Number
Bytes Sector
Bytes Sector
Data Length
Data Length
X
X
0
0
X
X
1
0
HD DR1 DR0
HD DR1 DR0
1
0
0
1
0
0
WRITE DATA
Command Phase
Result Phase
WRITE DELETED DATA
Command Phase
Result Phase
MT MFM
IPS
MT MFM
IPS
(Continued)
X
X
End of Track Sector Number
End of Track Sector Number
Number of Bytes per Sector
Number of Bytes per Sector
Intersector Gap Length
Intersector Gap Length
Drive Head Number
Drive Head Number
0
X
0
X
Status Register 0
Status Register 1
Status Register 2
Status Register 0
Status Register 1
Status Register 2
Sector Number
Sector Number
Sector Number
Sector Number
Track Number
Track Number
Track Number
Track Number
Head Number
Head Number
Bytes Sector
Bytes Sector
Data Length
Data Length
X
X
0
0
14
X
X
0
1
HD DR1 DR0
HD DR1 DR0
1
0
0
0
1
1
SCAN EQUAL
Command Phase
Result Phase
SCAN LOW OR EQUAL
Command Phase
Result Phase
MT MFM SK
IPS
MT MFM SK
IPS
X
X
End of Track Sector Number
End of Track Sector Number
Number of Bytes per Sector
Number of Bytes per Sector
Intersector Gap Length
Intersector Gap Length
Drive Head Number
Drive Head Number
X
X
Status Register 0
Status Register 1
Status Register 2
Status Register 0
Status Register 1
Status Register 2
Sector Step Size
Sector Step Size
Sector Number
Sector Number
Sector Number
Sector Number
Track Number
Track Number
Track Number
Track Number
Head Number
Head Number
Bytes Sector
Bytes Sector
X
X
1
1
X
X
0
1
HD DR1 DR0
HD DR1 DR0
0
0
0
0
1
1