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IASL(8) System Manager's Manual IASL(8)


iaslIntel ASL compiler and disassembler (iASL)


iasl [options] <input file>


The iasl is a fully-featured compiler for the ACPI Source Language (ASL). It translates ASL to ACPI Machine Language (AML), but iasl can also act as a disassembler, translating AML to ASL.



-@ file
Specify command file.
-I dir
Specify additional include directory.

General Output

-p prefix
Specify a path or filename prefix for all output files.
Disable all errors and warnings in the summary.
Use less verbose errors and warnings.
Enable optimization comments.
Disable remarks.
Disable signon.
-w 1 | 2 | 3
Set warning reporting level.

AML Output Files

-s a | c
Create AML in assembler (*.asm) or C (*.c) source file.
-i a | c
Create assembler (*.inc) or C (*.h) include file.
-t a | c
Create AML in assembler or C hex table (*.hex).

AML Code Generation

Disable all optimizations (compatibility mode).
Disable constant folding.
Disable integer optimization to operation codes.
Disable named reference string optimization.
-r revision
Override table header revision (1-255).


Create mixed, ASL and AML, listing file (*.lst).
Create namespace file (*.nsp).
Create combined source file (*.src).

AML Disassembler

-d file
Disassemble binary ACPI table to a file (*.dsl).
-dc file
Disassemble AML and immediately compile it.
-e f1, f2
Include ACPI table(s) for external symbol resolution.
Emit ACPI 2.0 compatible ASL code.
Get ACPI tables and write to files (*.dat).


Display additional help and compiler debug options.
Display operators allowed in constant expressions.
Display ACPI reserved method names.


acpi(4), acpidump(8), amldb(8)

Intel Corporation, iASL Compiler/Disassembler User Reference, Revision 2.00,, September 18, 2009.


The iasl compiler/disassembler is part of the Intel ACPI Component Architecture (ACPICA). It first appeared in NetBSD 6.0.


Among Intel engineers, Robert Moore <> was the chief architect behind iasl. This manual page was written for NetBSD by Jukka Ruohonen <>.
April 10, 2010 NetBSD 7.0