w83l517g Winbond Electronics Corp America, w83l517g Datasheet - Page 34

• Manufacturer Part Number: w83l517g
• Description: Winbond Lpc I/o For Notebook W83l517d/ W83l517d-f
• Manufacturer: Winbond Electronics Corp America

6.2
There are several status, data, and control registers in W83L517D. These registers are defined below:
6.2.1
This register is used to monitor several disk interface pins in PS/2 and Model 30 modes. In PS/2
mode, the bit definitions for this register are as follows:
INIT PENDING (Bit 7):
This bit indicates the value of the floppy disk interrupt output.
DRV2# (Bit 6):
0
1
STEP (Bit 5):
This bit indicates the complement of STEP# output.
TRAK0# (Bit 4):
This bit indicates the value of TRAK0# input.
base address + 0
base address + 1
base address + 2
base address + 3
base address + 4
base address + 5
base address + 7
Status Register A (SA Register) (Read base address + 0)
A second drive has been installed
A second drive has not been installed
Register Descriptions
ADDRESS
OFFSET
7
6
5
DT (FIFO) REGISTER
4
SB REGISTER
MS REGISTER
SA REGISTER
TD REGISTER
DI REGISTER
3
READ
- 34 -
2
1
W83L517D/W83L517D-F
0
REGISTER
DIR
INDEX
WP
HEAD
TRAK0
STEP
INIT PENDING
DRV2
DT (FIFO) REGISTER
DO REGISTER
DR REGISTER
CC REGISTER
TD REGISTER
WRITE