w83c43 Winbond Electronics Corp America, w83c43 Datasheet - Page 8

• Manufacturer Part Number: w83c43
• Description: Keyboard Controller
• Manufacturer: Winbond Electronics Corp America

(A) Input Port Definition (AT Mode), continued
(B) Output Port Definition (AT Mode)
(C) Test-input Port Definition (AT Mode)
Status Register (PS/2 Mode)
BIT
0
1
2
BIT
BIT
BIT
5
6
7
0
1
2
3
4
5
6
7
0
1
Output Buffer Full
Input Buffer Full
System Flag
BIT FUNCTION
Manufacturing Jumper Installed
0: Manufacturing jumper
1: Jumper not installed
Display Type Switch
0: Primary display attached to color/graphics
1: Primary display attached to monochrome
Keyboard Inhibit Switch
0: Keyboard inhibited
1: Keyboard not inhibited
System Reset
Gate A20
Undefined
Undefined
Output Buffer Full
Input Buffer Empty
Keyboard Clock (Output)
Keyboard Data (Output)
Keyboard Clock (Input)
Keyboard Data (Input)
0: Output buffer empty
1: Output buffer full
0: Input buffer empty
1: Input buffer full
This bit may be set to 0 or 1 by writting to the system flag
bit in the command byte of the keyboard controller. It is
set to 0 after a power-on reset.
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FUNCTION
FUNCTION
FUNCTION
DESCRIPTION
W83C43