W83877F 查看數據表（PDF） - Winbond

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W83877F

WINBOND I/O

Winbond 

W83877F

2.1.7 FDC Commands

Command Symbol Descriptions:

C:

Cylinder number 0 - 256

D:

DIR:

Data Pattern

Step Direction

DIR = 0, step out

DIR = 1, step in

DS0:

DS1:

Disk Drive Select 0

Disk Drive Select 1

DTL:

EC:

Data Length

Enable Count

EOT:

EFIFO:

End of Track

Enable FIFO

EIS:

EOT:

Enable Implied Seek

End of track

FIFOTHR: FIFO Threshold

GAP:

Gap length selection

GPL:

H:

Gap Length

Head number

HDS:

HLT:

HUT:

Head number select

Head Load Time

Head Unload Time

LOCK:

MFM:

Lock EFIFO, FIFOTHR, PTRTRK bits prevent affected by software reset

MFM or FM Mode

MT:

Multitrack

N:

The number of data bytes written in a sector

NCN:

ND:

New Cylinder Number

Non-DMA Mode

OW:

PCN:

Overwritten

Present Cylinder Number

POLL:

Polling Disable

PRETRK: Precompensation Start Track Number

R:

RCN:

Record

Relative Cylinder Number

R/W:

SC:

Read/Write

Sector/per cylinder

SK:

Skip deleted data address mark

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Publication Release Date: January 1996

Revision A2

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