Control unit for data processing peripherals - has phase increased or skipped by program control unit with adder and address counter

摘要

The central control unit for the peripherals of a data processing installation works on the TDM principle. The time in which the control unit is assigned to a specific peripheral (the phase) can be varied by a program control unit. The unit has an address counter activated by a clock pulse with a period equal to the command duration time. An adder at the counter output increments each binary signal by one unit and returns it. Also connected to the output of the counter is a program store which outputs the processing unit commands. Each of these contains a phase change bit which controls the incrementing of a phase counter at a specified binery value.