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JWasm is a Masm-compatible assembler. Its main features are:

  • support for 16-, 32- and 64-bit code generation
  • instruction sets up to AVX
  • native support for output formats Intel OMF, MS Coff (32/64-bit), Elf (32/64-bit), Binary, Windows PE (32/64-bit) and DOS MZ
  • CodeView symbolic debugging information for OMF (16/32-bit) and Coff (32/64-bit)
  • JWasm is written in C. The source is portable and has successfully been tested with Open Watcom, MS VC, GCC and more.


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