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RosAsm, the Bottom-Up Assembler for ReactOS. Perfectly appropriated for beginners in assembly language, from the lower level to advanced.

The easiest way for writing full 32 Bits Applications in Assembly .

RosAsm is the continuation of SpAsm project, with several minor diferences:

This program is totally free and open-source (Meaning that we release the source code within the main application).

We choosed to use our own License, that is totally compatible with GPL. Both licenses ate available to download at the links below: