A simple computer

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Abstract
The organization of a particular computer is described at a level of detail suitable for classroom presentation at an introductory level. The computer consists of several units which manipulate and store data, a bus structure connecting them, and a microprogramming mechanism to control their operation. Both instruction decoding and interpretation are determined by the microprogram. The microprogram for a single-address computer is given as an example; the student is asked to redo the microprogram to implement stack instructions or some other sequential instructions of his choice. An XPL program which (1) reads a microprogram, then (2) reads a program, then (3) executes the program with a run-time trace is presented in the appendices.

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