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).