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).