1166	 A Use of Macros in Translation of Symbolic Assembly Language of One Computer to Another	 A set of macro-operations has been prepared to assist in translating IBM symbolic assembly language programs to IBM machine language programs. This set inserted at the beginning of the symbolic deck treats incompatible instruction mnemonics as macro-instructions to produce equivalent instruction sets. Incompatible instructions are categorized into basic operational classes which can be expressed by a single basic skeleton. Several levels of macro calls are required to supply arguments to the basic skeleton for each particular instruction. Modification at execution time of the address or tag of an incompatible instruction requires incorporation of an address-tag equivalent. I O is handled by generating calls to I O simulation subroutines.
