Difference between revisions of "Developer Manual/Super IO"

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 Each of these functions, inside a Super I/O, is split into its own logical device and everyone of these devices is identified by an hex number (starting from 0x0) called logical device number (LDN).
-I.e. 0x05 and 0x06 are the LDN respectively for the keyboard and the mouse.
+I.e. addr 0x05 and 0x06 are the LDN respectively for the keyboard and the mouse.
 Check your chip's datasheet to find the complete list.
+== Super I/O configuration ==
+A Super I/O chip can be configured through the use of its configuration registers.
+These registers can be divided into two classes:
+* Super I/O control and configuration
+* Logical Device control and configuration
+The first class contains all the registers that have the same value no matter which LDN has been selected, a sort of "global" register.
+An example of this class can be found in the LDN register (addr 0x7) which is used to select an LDN, the Super I/O ID register (addr 0x20) and the Revision ID register (addr 0x27) which contain respectively the ID and the revision number of your chip.
+The second class includes all the registers that are relative to the LDN that has been previously selected.
+Among these ones there is the Logical Device Control register (addr 0x30) which is used to enable or disable the functionality of that Logical Device, the I/O Address register (addr 0x60-0x61) which are used to access runtime registers, and others.
 == Virtual Logical Devices (vLDN) ==

Revision as of 22:08, 2 March 2016