nasm - 2.16.03-1 main

Netwide Assembler. NASM will currently output flat-form binary files,
a.out, COFF and ELF Unix object files, and Microsoft 16-bit DOS and
Win32 object files.
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Also included is NDISASM, a prototype x86 binary-file disassembler
which uses the same instruction table as NASM.
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NASM is released under the 2-clause BSD license.