Figure 4-19.—Example of a demultiplexer circuit.Demultiplexer —A data demultiplexer routesdata from one input to anyone of several outputs. Referto figure 4-19.Selectors—Some registers have no inputselection capability and require the selection of sourceinformation to be made before actual input gating.They expand the number of input data paths to a register.Refer to figure 4-20.Figure 4-20.—Example of a selector circuit.Translators—This type of circuitry in acomputer can be used to translate bits of data into a codeto be used in different parts of the computer. Anexample is a function code translator used to translatemachine octal codes into function codes so thecomputer can execute instructions. Different parts of atranslator provide partial translation to initiate certainpreliminary operations connected with instructionexecution.Other parts of a translator provide theFigure 4-21.—Example of preliminary translator circuitry.4-14
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