The macro assembler, SWAP
M. E. Barton · 1970
A new macro assembler, the SWitching Assembly Program (SWAP), provides a variety of new features and avoids the restrictions which are generally found in such programs. Most assemblers were not designed to be either general enough or powerful enough to accomplish tasks other than produce object code. SWAP may be used for a wide variety of other problems such as interpretively processing a language quite foreign to the assembler.