3 io \- access PC I/O registers
15 accesses PC I/O space.
16 The operation to be performed is selected with
20 for reading or writing, respectively.
21 The default operation size is a byte.
22 C style notation for integers (e.g.
34 Perform a word (16 bit) operation.
37 Perform a long / double word (32 bit) operation.
40 Access a 64 bit wide machine specific register (MSR).
43 Access embedded controller space.
51 first appeared in 9front (April, 2011).