Editing FASM (section)

{{short description|Open source assembler for x86 processors}}
{{For|the Royal Navy project also known as "FASM"|Future Attack Submarine}}
{{Infobox software
| name = FASM
| screenshot = FASM2.png
| caption = Screenshot with supplied example
| developer = Tomasz Grysztar
| released = {{Start date and age|2000|03}}
| latest release version = {{wikidata|property|reference|edit|P348}}
| latest release date = {{Start date and age|{{wikidata|qualifier|P348|P577}}}}
| latest_preview_version = 
| latest_preview_date = 
| programming language = Assembly
| operating_system = [[Unix-like]], [[Linux]], [[Microsoft Windows|Windows]] and IDE, [[MS-DOS]] and IDE, [[OpenBSD]], etc., [[MenuetOS]], [[KolibriOS]], [http://octavio.vega.fernandez.googlepages.com/octaos/ OctaOS], DexOS and IDE, [[SkyOS]], [http://www.oby.ro/os/ Solar_OS]
| platform = [[x86]], [[x86-64]]
| genre = [[Assembly language assembler|Assembler]]
| license = [[Simplified BSD license|Simplified BSD]] with a [[weak copyleft]] clause
| website = {{url|flatassembler.net}}
}}

'''FASM''' (''flat assembler'') is an [[assembly language assembler|assembler]] for [[x86]] processors. It supports [[x86 assembly language|Intel-style]] [[assembly language]] on the [[IA-32]] and [[x86-64]] computer architectures. It claims high speed, size optimizations, [[operating system]] (OS) portability, and [[macro (computer science)|macro]] abilities.<ref name="Manual">{{cite web |author=Grysztar |first=Tomasz |date=2008-05-12 |title=Flat Assembler Programmer's Manual |url=http://flatassembler.net/docs.php?article=manual |accessdate=2008-05-12 |website=flat assembler}}</ref><ref name="WhichAsm"/> It is a [[low-level programming language|low-level]] assembler<ref name="WhichAsm"/> and intentionally uses very few [[command line interface|command-line]] options. It is [[free and open-source software]].

All versions of FASM can directly output any of the following: flat "raw" [[binary file|binary]] (usable also as MS-DOS [[COM file|COM executable]] or SYS driver), objects: [[Executable and Linkable Format]] (ELF) or [[COFF|Common Object File Format]] (COFF) (classic or MS-specific), or executables in either [[DOS MZ executable|MZ]], ELF, or [[Portable Executable]] (PE) format (including WDM drivers, allows custom MZ DOS stub). An unofficial port targeting the [[ARM architecture]] also exists.<ref name="ARM">{{cite web|url=http://arm.flatassembler.net/|title=FASMARM|date= 2008-03-20|accessdate=2008-05-12}}</ref>