You can run AMODE 64 applications written in assembler language in Language Environment. AMODE 64 applications written in C or C++ can also call or be called by assembler language applications.

This topic discusses considerations for assembler applications.

You can write assembler language applications that conform to the 64-bit XPLINK call linkage. z/OS Language Environment Vendor Interfaces has details on the 64-bit XPLINK architecture that will be useful to an assembler programmer.