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PC8477B Scheda tecnica(PDF) 18 Page - National Semiconductor (TI)

[Old version datasheet] Texas Instruments acquired National semiconductor.
Il numero della parte PC8477B
Spiegazioni elettronici  Advanced Floppy Disk Controller
PDF  54 Pages
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Produttore elettronici  NSC [National Semiconductor (TI)]
Homepage  http://www.national.com
Logo NSC - National Semiconductor (TI)

PC8477B Scheda tecnica(HTML) 18 Page - National Semiconductor (TI)

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40 Command Set Description (Continued)
SET TRACK
Command Phase
0WNR100
0
0
1
0
0
1
1
0
MSB
DR1
DR0
New Track Number (PTR)
Execution Phase
Internal register is read or written
Result Phase
Value
SPECIFY
Command Phase
0000001
1
Step Rate Time
Motor Off Time
Motor On Time
DMA
Execution Phase
Internal registers are written
No Result Phase
VERIFY
Command Phase
MT
MFM
SK
1
0
1
1
0
EC
X
X
X
X
HD
DR1
DR0
Track Number
Drive Head Number
Sector Number
Bytes per Sector
End of Track Sector Number
Intersector Gap Length
Data LengthSector Count
Execution Phase
Data is read from disk but not transferred
to the system
Result Phase
Status Register 0
Status Register 1
Status Register 2
Track Number
Head Number
Sector Number
Bytes per Sector
VERSION
Command Phase
00010000
Result Phase
10010000
WRITE DATA
Command Phase
MT
MFM
0
0
0
1
0
1
IPS
X
XXXHDDR1
DR0
Track Number
Drive Head Number
Sector Number
Bytes per Sector
End of Track Sector Number
Intersector Gap Length
Data Length
Execution Phase
Data is transferred from the system to
the controller via DMA or Non-DMA modes and written to
the disk
Result Phase
Status Register 0
Status Register 1
Status Register 2
Track Number
Head Number
Sector Number
Bytes per Sector
WRITE DELETED DATA
Command Phase
MT
MFM
0
0
1
0
0
1
IPS
X
XXXHDDR1
DR0
Track Number
Drive Head Number
Sector Number
Bytes per Sector
End of Track Sector Number
Intersector Gap Length
Data Length
Execution Phase
Data is transferred from the system to
the controller via DMA or Non-DMA modes and written to
the disk
Result Phase
Status Register 0
Status Register 1
Status Register 2
Track Number
Head Number
Sector Number
Bytes per Sector
18



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