Z86319 Datasheet, PDF (21/23 Pages) Zilog, Inc. – PS/2 MOUSE CONTROLLER

Zilog
Z8 PORT REGISTERS
R0 Port 0
D7 D6 D5 D4 D3 D2 D1 D0
P00
P01
P02
Reads as “11111”
Writing has NO
EFFECT
Figure 34. Port 0 Register (Read/Write)
R0 Port 2
D7 D6 D5 D4 D3 D2 D1 D0
P27 P26 P25 P24 P23 P22 P21 P20
Figure 35. Port 2 Register (Read/Write)
Z86319
PS/2 Mouse Controller
R3 Port 3
1
D7 D6 D5 D4 D3 D2 D1 D0
Reads 1
P31
Reads 0
P33
Reads 1111
Figure 36. Port 3 Register (Read Only)
DS97KEY1605
PRELIMINARY
21