Abstract
Microprogramming is a technique for implementing machine language instruction sets -- it is critical in today's computer architectures and operating systems. An emulator is a set of microprograms that implements the architecture of one machine on another; microprogramming is often used in emulation to make one computer system appear as if it were another. This paper presents the architecture for a microprogrammed computer system, the VSEM. The simulated virtual computer system, its monitor and a simulated concurrent PASCAL are discussed. The usefulness of the VSEM, its monitor and the concurrent PASCAL as vehicles for instruction in systems programming is addressed.
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