asl compiler and DSDT

ASL(ACPI Source language) compiler: translate ACPI source language into ACPI machine language.
http://www.acpi.info/toolkit.htm

DSDT (Differentiated System Description Table): part of the ACPI specification and it supplies configuration information about a base system
https://wiki.archlinux.org/index.php/DSDT

tool: acpidump
dump the DSDT table from BIOS to a file