W83977F-A Datasheet, PDF (37/182 Pages) Winbond – WINBOND I/O

W83977F-A/ W83977G-A/ W83977AF-A/ W83977AG-A
In PS/2 Model 30 mode, the bit definitions for this register are as follows:
765 43 ²¹ 0
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
INDEX (Bit 2):
This bit indicates the complement of INDEX output.
WP (Bit 1):
0 disk is not write-protected
1 disk is write-protected
DIR (Bit 0)
This bit indicates the direction of head movement.
0 inward direction
1 outward direction
DIR
WP
INDEX
HEAD
TRAK0
STEP F/F
DRQ
INIT PENDING
Publication Release Date: May 2006
-29 -
Revision 0.60