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Package flat assembler


Titleflat assembler
Version1.73.34
DescriptionFast but powerful 80x86 assembler
SummaryThe flat assembler (abbreviated to fasm) is a fast self-assembling assembler for DOS, Windows and Linux operating systems. It was designed primarily for the assembly of x86 instructions and it supports x86 and x86-64 instructions sets with MMX, 3DNow!, SSE up to SSE4, AVX, AVX2, XOP and AVX-512 extensions and can produce output in plain binary, MZ, PE, COFF or ELF format. It includes the powerful but easy to use macroinstruction support and does multiple passes to optimize the size of instruction codes. The flat assembler is self-hosting and the complete source code is included.
Changes* updated to v1.73.74
* NLS: English typo corrections and Swedish translation update
AuthorTomasz Grysztar <privalov _AT_ o2.pl>
Maintained byTomasz Grysztar <privalov _AT_ o2.pl>
Copying policyModified (2-Clause) BSD License
Keywordsassembler, asm, fasm
PlatformsDOS
Primary sitehttp://flatassembler.net/
Original SiteSourceForge - fasm
Date modified2026-01-30.9
Date entered2025-12-03
CRC32a52f4575
SHA134b552789fe175ce18a9b9dedf4c8daa75cc8601
Package size482,381 bytes
Downloadfasm.zip



2 alternate versions
modified 2026-06-04.3, version 1.73.35
modified 2026-01-30.9, version 1.73.34
modified 2025-04-09.8, version 1.73.32
Available languages: English, Español, Deutsch, français, Türkçe, Svenska
page last modified on Thu Jun 4 08:02:20 CDT 2026