W83977AF Information Storage Devices, Inc, W83977AF Datasheet - Page 119

• Manufacturer Part Number: W83977AF
• Description: W83877TF Plus Kbc, Cir, RTC
• Manufacturer: Information Storage Devices, Inc

7.4
Commands
COMMAND
A4h
A5h
A6h
A7h
A8h
A9h
20h
60h
Read Command Byte of Keyboard Controller
Write Command Byte of Keyboard Controller
Test Password
Returns 0Fah if Password is loaded
Returns 0F1h if Password is not loaded
Load Password
Load Password until a "0" is received from the system
Enable Password
Enable the checking of keystrokes for a match with the password
Disable Auxiliary Device Interface
Enable Auxiliary Device Interface
Interface Test
BIT
BIT
00
01
02
03
04
7
6
5
4
3
2
1
0
Reserved
Disable Auxiliary Device
Disable Keyboard
Reserve
System Flag
Enable Auxiliary Interrupt
IBM Keyboard Translate Mode
Enable Keyboard Interrupt
No Error Detected
Auxiliary Device "Clock" line is stuck low
Auxiliary Device "Clock" line is stuck high
Auxiliary Device "Data" line is stuck low
Auxiliary Device "Data" line is stuck low
BIT DEFINITION
BIT DEFINITION
- 107 -
FUNCTION
W83977F/ W83977AF
Publication Release Date:March 1998
PRELIMINARY
Revision 0.58