86:Ports:20
From WikiTI
Synopsis
Port Number: 20-3Fh
Function: None
This port range is meant for communication with external I/O devices, but the TI-86 has no such devices.
Read Values
Because these ports are not connected to anything, their read behavior is the same as Unused Banks.
Write Values
Because these ports are not connected to anything, their write behavior is the same as unused banks. That is, writes are ignored.
