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Design courses in Computer Systems Design are being taught in many undergraduate programs both for Computer Science and Electrical Engineering students. A design project is explained in this paper to give all the information to the students regarding the important concepts in both logic and systems level. The computer has sixteen instructions, two K memory and a single index register. This project can also be enlarged by introducing many extra hardware features.

Teaching courses in logic and systems design is not complete unless th e students are able to design a logic system as a part of their course work .A project on the design of an asynchronou s computer system is presented in this paper . This system is microprogrammed and has n o master clock to time the micro operations . The computer designed has sixteen machin e instructions, 2K core memory, and a microcomputer with 256 word ROM .

Teaching courses in logic and systems design is not complete unless th e students are able to design a logic system as a part of their course work .A project on the design of an asynchronou s computer system is presented in this paper . This system is microprogrammed and has n o master clock to time the micro operations . The computer designed has sixteen machin e instructions, 2K core memory, and a microcomputer with 256 word ROM . . INTRODUCTIO NMost digital systems have maste r clock generators whose clock pulses contro] . the timing of various micro-leve l operations . Such systems are known a s synchronous systems . In contrast, w e have asynchronous systems without such a master clock to time the micro-leve l operations . In these systems, the termination of a micro-level operation itsel f will initiate the next micro-level operation . Practically speaking, an asynchronous system will be a useful subsystem within a larger synchronous system . Suc h systems are needed when it cannot b e decided ahead of time how many cloc k pulses long an operation would take . On e example is during the execution of shif t and rotate instructions . The time the y require depends upon the value of th e operand, decided by the user but not th e designer .Asynchronous designs are taught i n most of the switching circuit courses . However, many teachers prefer giving a synchronous design project (1) in suc h courses . The project presented here ha s been tried (with fewer instructions) i n a graduate level switching theory cours e and the student response was very encouraging . This project is intended to giv e the students necessary experience in bot h asynchronous design as well as microprogramming .Students taking this course ar e assumed to have taken at least one cours e in logic design (2,3,4 ) (including Boolean Algebra, flip-flops, registers , and basic logic circuit design .) Beside s this course, the students are assumed t o have a good background in at least on e assembler language . The project was chosen to be small enough to cover in a semester . The students are expected t o spend between twenty and thirty hours o f serious work to complete this project . . ABOUT THE PROJEC TThe project deals with the design o f a laboratory computer with sixteen machin e language instructions described below .

Design courses in Computer Systems Design are being taught in many undergraduate programs both for Computer Science and Electrical Engineering students. A design project is explained in this paper to give all the information to the students regarding the important concepts in both logic and systems level. The computer has sixteen instructions, two K memory and a single index register. This project can also be enlarged by introducing many extra hardware features.