io – access PC I/O registers|
io [ –WLMErw ] address [ value ]|
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.
Io first appeared in 9front (April, 2011).|