Port Pin State Register (P N Pin) - Intel 386 User Manual

Port Pin State
P n PIN ( n =1–3)
(read only)
7
PS7 PS6
Bit Bit
Number Mnemonic
7–0 PS7:0
Figure 16-6. Port Pin State Register (P n PIN)
PS5 PS4
Pin State:
Reading a PS bit returns the logic state present on the associated port
pin.
INPUT/OUTPUT PORTS
Expanded Addr: F860H, F868H, F870H
ISA Addr: —
Reset State: XXH
PS3 PS2 PS1
Function
0
PS0
16-9