IO(1)                                                       IO(1)

     NAME
          io - access PC I/O registers

     SYNOPSIS
          io [ -WLMErw ] address [ value ]

     DESCRIPTION
          io accesses PC I/O space.  The operation to be performed is
          selected with -r or -w for reading or writing, respectively.
          The default operation size is a byte.  C style notation for
          integers (e.g.  0x42 or 023) is accepted for the address and
          value parameters.

          -W   Perform a word (16 bit) operation.

          -L   Perform a long / double word (32 bit) operation.

          -M   Access a 64 bit wide machine specific register (MSR).

          -E   Access embedded controller space.

     SOURCE
          /sys/src/cmd/io.c

     SEE ALSO
          seg(1), arch(3)

     HISTORY
          Io first appeared in 9front (April, 2011).