W83L517D Datasheet, PDF (36/138 Pages) Winbond – LPC SUPER I/O

HEAD (Bit 3):
This bit indicates the complement of HEAD# output.
0
side 0
1
side 1
INDEX# (Bit 2):
This bit indicates the value of INDEX# output.
WP# (Bit 1):
0
disk is write-protected
1
disk is not write-protected
DIR (Bit 0)
This bit indicates the direction of head movement.
0
outward direction
1
inward direction
In PS/2 Model 30 mode, the bit definitions for this register are as follows:
7 65 43 ²¹ 0
DIR
WP
INDEX
HEAD
TRAK0
STEP F/F
DRQ
INIT PENDING
INIT PENDING (Bit 7):
This bit indicates the value of the floppy disk interrupt output.
DRQ (Bit 6):
This bit indicates the value of DRQ output pin.
STEP F/F (Bit 5):
This bit indicates the complement of latched STEP# output.
TRAK0 (Bit 4):
This bit indicates the complement of TRAK0# input.
W83L517D
Version 0.6
29
Publication Release Date: Apr. 2000
Revision 0.60