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).