This is porter which can allow you to send any byte to any port or receive a byte from any port.
Ports are 16 bit and are represented as 4 digit hexadecimal numbers and values are 8 bit represented as 2 digit hexadecimal numbers.

Press 's' or 'r' or 'p' to send or receive or display registers respectively.

For send you'll be asked the port and then the value to send.
There is no need to press enter after keying in the value.
Example: (This will reboot)


port>0064
send>FE


For send you just have to enter the 4 digit hex port.
Example:

port>0060
got: 0B


Have fun!
