2202	 Dynamic Microprogramming Processor Organization and Programming	 A dynamically microprogrammed processor is characterized by a small k -bit word read-write micro storage. The access time of this storage is similar to the cycle time of the machine - nsec . This microstorage is used to contain both data and subroutines. The micro instructions in such a processor differ from the conventional in that they perform only purely combinatorial operations sequencing is under the control of the microinstruction. The presence of the read-write microstorage permits a more flexible assignment of resources than the read-only storage. In particular the processor developed in this paper stresses the simultaneous operation within the microinstruction of the adder shifter masker and testing facilities of the processor. A microassembly language is developed and the overhead involved in subroutine linkages is analyzed. The efficiency of a flexible software linkage scheme is examined as to its overhead for various subroutine characteristics. Finally three examples of problem-oriented programming are considered and the resulting coding is compared against a System assembly language version with the technology normalized. microprogramming read-write microstorage subroutine linkage execution speed
