PIT: A macro‐implemented implementation language

An implementation technique called PIT, for pseudo instructional technique, is described which utilizes the macro capabilities of most macro assemblers. A low level machine architecture is described via a set of macros that include some ‘high level’ features. Since the macros manipulate computer words, and refer to actual registers, their implementation in a system is relatively efficient, but since they do not reflect any one particular hardware design, they can be implemented by almost any macro assembler. Tests are built into the macros so that a PIT program will run without change on any machine that has defined these macrosThis technique should provide an alternative to using higher level languages as implementation languages if the object code produced by those compilers is deemed too slow (or too large) for the application that is being programmed.