Tool for helping find and verify IO ports in DOS.
Could be used just after having learnt a bit about on port IO.
Start port-io.exe.
Press f to find input ports.
Range to look for Port start -> Port end.
Port scanning in progress.
Scanned input ports (not perfect).
Press r to read from port.
Port number to read (96 is keyboard port).
Length of text to input is the number of reads to make.
Key w was pressed and released (effect can be seen).
Press w to write to port.
Port number to write to (97 here).
Text to be sent is the data.
Number of times to send the data.
Data is sent to port 97.
