Data transfer system including micro-program memory - transmits micro-instructions according to address memory and validates new address code after each sequence has been processed

摘要

The microprogramme control system includes a memory for a number of microprogramme, each of which comprises a number of micro-instructions each of which consists of a number of bits. An interruption procedure comprises a unit to derive a micro-instruction address, which is memorised according to a previous instruction. The new address is released according to a selection system. After the information has been transferred, a signal is returned to the address memory to validate a new address code. The first unit involved is a multiplexer, and further units include further multiplexers to distribute the addressed signals to the appropriate input/output units. The final signal to terminate the signal passes through an AND gate.