ib, iw, id (Input from Port)
The ib, iw, and id commands read and display a byte, word, or double word from the selected port.
ib Address
iw Address
id Address
Parameters
Address
The address of the port.
Environment
Modes |
Kernel mode only |
Targets |
Live debugging only |
Platforms |
x86-based computer only |
Remarks
The ib command reads a single byte, the iw command reads a word, and the id command reads a double word.
Make sure that reading an I/O port does not affect the behavior of the device that you are reading from. Some devices change state after a read-only port has been read. You should also not try to read a word or double-word from a port that does not allow values of this length.