W83C43 Datasheet, PDF (9/21 Pages) Winbond – KEYBOARD CONTROLLER

W83C43
Status Register (PS/2 Mode), continued
BIT
BIT FUNCTION
3
Command/Data
4
Inhinit Switch
5
Auxiliary Device Output
Buffer
6
General Purpose Time-
out
7
Parity Error
DESCRIPTION
0: Data byte
1: Command byte
0: Keyboard is inhibited
1: Keyboard is not inhibited
0: Auxiliary device output buffer empty
1: Auxiliary device output buffer full
0: No time-out error
1: Time-out error
0: Odd parity
1: Even parity (error)
Input Port Definition
BIT
0
1
2
3
4
5
6
7
FUNCTION
Keyboard Data Input
Mouse Data Input
Undefined
Undefined
RAM on System Board
0: Disable second 256 KB of system board RAM
1: Enable second 256 KB of system board RAM
Manufacturing Jumper
0: Manufacturing jumper
1: Jumper not installed
Display Type Switch
0: Primary display attached to color/graphics
1: Primary display attached to monochrome
Keyboard Input Switch
0: Keyboard inhibited
1: Keyboard not inhibited
Output Port Definition
BIT
0
System Reset
1
Gate A20
2
Mouse Data Output
3
Mouse Clock Output
FUNCTION
Publication Release Date: January 1996
-9-
Revision A2