Computer Organization & Architecture · topic
Hardwired control from a step counter, decoders and sum-of-products signal equations; microprogrammed control with control words, horizontal and vertical microinstructions, control-memory size calculations, microinstruction sequencing and a short note on nanoprogramming.
The hardwired control unit: instruction decoder, step counter and step decoder, condition and external inputs, and control signals as sums of step-and-instruction products derived from the single-bus step tables. Step-counter sizing, waiting for memory, conditional end of an instruction, and a side-by-side comparison with microprogrammed control.
A partial preview of the top of the sheet. The full sheet is in the Computer Organization & Architecture cheat sheet pack.
Microprogrammed control: control word, microinstruction, microprogram, control memory, microprogram counter and mapping logic. Horizontal and vertical microinstruction formats with width and control-memory size worked twice, solving a format for its next-address field, microinstruction sequencing by increment, branch and mapping, a microprogram for the single-bus instructions and a short note on nanoprogramming.
A partial preview of the top of the sheet. The full sheet is in the Computer Organization & Architecture cheat sheet pack.
