DSDT: Difference between revisions

''This page is about the ACPI DSDT (Differentiated System Description Table)''

It describes devices (I/O Ports, IRQs, Memory Mappings, etc.).

==DSDT==

===Introduction===

DSDT stands for ''Differentiated System Description Table''. It Is a major [[ACPI]] table and is used to describe what peripherals the machine has. Also holds information on PCI IRQ mappings and power management. For example when powering down by the OS, it should find the _S5 object which describes how to do that. It is pointed to by the [[FADT]].

<br />

* bios/acpi-dsdt.hex for hex dump of the bytecode output

For example here's the description of the [[RTC|Real Time Clock]]:

/* PIIX3 ISA bridge */

Device (ISA) {

})

}

and what's it became after compilation:

<pre>