W83877TF/W83877TG
Publication Release Date: May 2006
-27- Revision 0.7
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:
1
2
34567
0
WP
INDEX
HEAD
TRAK0
STEP F/F
DRQ
INIT PENDING
DIR
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.
HEAD (Bit 3):
This bit indicates the value of
HEAD output.
0 side 1
1 side 0