Flat assembler
Flat assembler (FASM) is an open-source assembler for the x86 and x86-64 CPU instruction sets. It supports all variations of x86 assembly language and can generate binary code for all flavors of MS-DOS, Windows, Linux and macOS. FASM is known for its speed, small size, and flexib
assembler
x86
x8664
assembly
compiler
Flat Assembler (FASM) - Open-Source x86 Assembly
Fast, flexible, and feature-rich assembler for MS-DOS, Windows, Linux, and macOS - Download now!
What is Flat assembler?
Flat assembler (FASM) is a fast, open-source assembler for the x86 and x86-64 CPU instruction sets. It supports all variations of x86 assembly language syntax and is able to generate optimized binary machine code for all flavors of MS-DOS, Windows, Linux, FreeBSD, Mac OS X/macOS and UEFI firmware.
Some key features of FASM include:
- Very small and fast - the executable itself is under 100KB
- Many directives and syntax options for high-level control over code generation
- Support for macros, loops, conditional assembly and other constructs
- Can assemble code for 16-bit, 32-bit and 64-bit operating systems
- Output formats including EXE, COM, bin, elf, mach-o, coff
- Integrated linker and ability to call external linker (ld)
- Plugin architecture for extending functionality
FASM is commonly used for bootloaders, DOS .com programs, demoscene productions, OS kernels, drivers, and video games. It competes with assemblers like MASM, NASM, YASM and GAS in features but exceeds them in assembly speed and code optimization.
Flat assembler Features
Features
- Supports all variations of x86 assembly language
- Can generate binary code for MS-DOS, Windows, Linux and macOS
- Fast assembly speed
- Small memory footprint
- Highly configurable and flexible
Pricing
- Open Source
Pros
Free and open source
Very fast assembly
Small and lightweight
Supports many platforms and instruction sets
Highly customizable
Cons
Steep learning curve
Limited debugging capabilities
Not as feature rich as some commercial assemblers
Lacks a GUI
Minimal documentation
Official Links
The Best Flat assembler Alternatives
Top Development and Assemblers and other similar apps like Flat assembler
Here are some alternatives to Flat assembler:
Suggest an alternative ❐
Emu8086
Emu8086 is an emulator program that allows software written for the Intel 8086 16-bit microprocessor to run on modern personal computers. It emulates the 8086 CPU and other hardware found in early IBM PC-compatible computers, providing a complete environment to execute 8086 machine code without any modifications.The key features of...
NASM
The Netwide Assembler, more commonly known as NASM, is an assembler and disassembler for Intel x86 architectures. It supports a range of object file formats including binary, COFF, Win32, Win64, ELF32, ELF64, Mach-O, a.out and more.As an open-source tool, NASM is completely free to download and use. It runs on...
Easy code
Easy code is a multi-language code editor designed with developers in mind. It provides essential coding features like syntax highlighting, auto-completion of code, and debugging tools to detect issues quickly - all designed to increase coding efficiency.Key features of Easy Code include:Syntax highlighting for over 50 programming languages including JavaScript,...
MASM Builder
MASM Builder is an integrated development environment (IDE) designed specifically for assembly language programming using the Microsoft Macro Assembler (MASM). It includes a full-featured text editor with syntax highlighting and auto-completion to make writing assembly code easier. Key features of MASM Builder include:Integrated debugger for stepping through assembly codeProject management...
