NOMASM51 Disables MASM 5.1 Enhancements TASM Directive NOMASM51 This directive is used to disable a previous MASM51 directive. The MASM51 directive allows you to use certain MASM 5.1 enhancements not normally available in TASM. Notes: For a list of MASM 5.1 enhancements under the MASM51 directive, see MASM51.