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Microsoft Macro Assembler
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<p>Microsoft Macro Assembler (MASM) is an <a href="/facts/X86_architecture/Kypq5fgu">x86</a> <a href="/facts/Assembly_language_assembler/7XuV0cla">assembler</a> that uses the <a href="/facts/X86_assembly_language/GTUtvkMm">Intel syntax</a> for <a href="/facts/MS-DOS/fVrrz1uN">MS-DOS</a> and <a href="/facts/Microsoft_Windows/bwhAhuSL">Microsoft Windows</a>. Beginning with MASM 8.0, there are two versions of the assembler: One for <a href="/facts/16-bit/bTGS44Ne">16-bit</a> & <a href="/facts/32-bit/TDMVce8s">32-bit</a> assembly sources, and another (ML64) for <a href="/facts/64-bit/AgvkQHkM">64-bit</a> sources only. </p><p>MASM is maintained by <a href="/facts/Microsoft/nGIDDXdx">Microsoft</a>, but since version 6.12 it has not been sold as a separate product. It is instead supplied with various Microsoft <a href="/facts/Software_development_kit/2Hkk6Hbs">SDKs</a> and <a href="/facts/C_(programming_language)/Ky2No763">C</a> <a href="/facts/Compiler/WNfCDFJe">compilers</a>. Recent versions of MASM are included with <a href="/facts/Microsoft_Visual_Studio/omNe6Lej">Microsoft Visual Studio</a>. </p><p>Notable applications compiled using MASM are <a href="/facts/RollerCoaster_Tycoon_(video_game)/KnFtoLUK">RollerCoaster Tycoon</a> which was 99% written in assembly language and built with MASM. </p>