Appendix E. Restrictions of precompiled 16-bit Binary JWASMR.EXE

JWASMR lacks some features of the other precompiled binaries:

• no support for long filenames.
• no support for Open Watcom's fastcall register convention.
• supports OMF, BIN and MZ output formats only.
• no support for 64-bit, SSSE3, SSE4 and AVX.
• no support for OPTION variants that are specific for COFF, ELF or 64-bit.
• no support for OPTION CODEVIEW directive.
• no support for directive LABEL's array size syntax extension.

Since the JWasm source is available, one may enable this or that feature if really needed, though.