Abstract

APL*PLUS II is a second-generation 32-bit APL interpreter that runs under the MS DOS operating system. A recent release has introduced two new system functions — ONA and OMLOAD — that enable APL to dynamically load and execute programs written in compiled languages such as C and Fortran. These enhancements presented both design and implementation challenges. On the design side, it was necessary to make it as easy as possible for the APL programmer to integrate non-APL routines into applications. The implementation side required considerable technical creativity and invention, since the MS DOS environment provides no built-in functions for dynamic loading and execution of programs.

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