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W83627DHG
Publication Release Date: Aug, 22, 2007
-160- Version
1.4
13.3 Status Register
The status register is an 8-bit, read-only register at I/O address 64h (Default, PnP programmable I/O
address LD5-CR62 and LD5-CR63) that holds information about the status of the keyboard controller
and interface. It may be read at any time.
BIT BIT
FUNCTION
DESCRIPTION
0
Output Buffer Full
0: Output buffer empty
1: Output buffer full
1
Input Buffer Full
0: Input buffer empty
1: Input buffer full
2 System
Flag
This bit may be set to 0 or 1 by writing to the system flag bit in the
command byte of the keyboard controller. It defaults to 0 after a
power-on reset.
3 Command/Data
0: Data byte
1: Command byte
4 Inhibit
Switch
0: Keyboard is inhibited
1: Keyboard is not inhibited
5
Auxiliary Device
Output Buffer
0: Auxiliary device output buffer empty
1: Auxiliary device output buffer full
6
General Purpose
Time-out
0: No time-out error
1: Time-out error
7 Parity
Error
0: Odd parity
1: Even parity (error)
13.4 Commands
COMMAND
FUNCTION
20h
Read Command Byte of Keyboard Controller
60h
Write Command Byte of Keyboard Controller
BIT
1
2
3
4
5
6
7
0
BIT DEFINITION
Reserved
IBM Keyboard Translate Mode
Disable Auxiliary Device
Disable Keyboard
Reserve
System Flag
Enable Auxiliary Interrupt
Enable Keyboard Interrupt
Содержание W83627DHG
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