W83787IF Datasheet, PDF (21/123 Pages) Winbond – WINBOND I/O WITH SERIAL-INFRARED SUPPORT

W83787IF
2.1.5 FDC Commands
Command Symbol Descriptions:
C:
Cylinder number 0 - 256
D:
Data Pattern
DIR:
Step Direction
DIR = 0, step out
DIR = 1, step in
DS0:
Disk Drive Select 0
DS1:
Disk Drive Select 1
DTL:
Data Length
EC:
Enable Count
EOT:
End of Track
EFIFO: Enable FIFO
EIS:
Enable Implied Seek
EOT:
End of track
FIFOTHR: FIFO Threshold
GAP:
Gap length selection
GPL:
Gap Length
H:
Head number
HDS:
Head number select
HLT:
Head Load Time
HUT:
Head Unload Time
LOCK:
Lock EFIFO, FIFOTHR, PTRTRK bits prevent affected by software reset
MFM:
MFM or FM Mode
MT:
Multitrack
N:
The number of data bytes written in a sector
NCN:
New Cylinder Number
ND:
Non-DMA Mode
OW:
Overwritten
PCN:
Present Cylinder Number
POLL:
Polling Disable
PRETRK: Precompensation Start Track Number
R:
Record
RCN:
Relative Cylinder Number
R/W:
Read/Write
SC:
Sector/per cylinder
SK:
Skip deleted data address mark
SRT:
Step Rate Time
ST0:
Status Register 0
ST1:
Status Register 1
ST2:
Status Register 2
ST3:
Status Register 3
WG:
Write gate alters timing of WE
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Publication Release Date:Sep 1995
Revision A1