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The flat assembler is a fast and efficient self-assembling x86 assembler for DOS, Windows and Linux operating systems.
Currently it supports x86 and x86-64 instructions sets with MMX, 3DNow!, SSE up to SSE4, AVX and XOP extensions, can produce output in binary, MZ, PE, COFF or ELF format.

It includes the powerful but easy to use macroinstruction support and does multiple passes to optimize the instruction codes for size.
The flat assembler is self-compilable and the complete source code is included.

The only difference between the various flat assembler packages is the operating system on which they can be executed.
From given source each version will generate exactly the same output file, so with each of the following releases
you can compile programs for any operating system.

Although flat assembler is freeware, donations are greately appreciated to help cover cost and time-loss. It is a great help in maintaining this project. If you would like to send money donation, please click the button beside.

The main goal of this section is to provide all the information you would need to create programs with flat assembler,
but since guides for a lot of topics has not been written yet, it's possible that you won't find here the help you are
looking for. In such case please visit the message board, where you can ask any questions regarding flat assembler.

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