|Version 1 (modified by mxb, 8 years ago) (diff)|
When accessing the hardware directly, one of the most common operations is to read and write to hardware IO ports.
There is a macro located in losp/muerte/io-ports.lisp. This macro establishes an easy to use method of using IO ports.
Reading from an IO port is accomplished through the following function call:
(io-port <address> <data-type>)
- <address> is the io-port address.
- <data-type> is one of the following:
To write to an IO port you use the following construction
(setf (io-port <address> <data-type>) <value>)
Where <address> and <data-type> are from the same types are IO port reads and <value> is the data you wish to write to the port.