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Microprogram control system

阅读:18发布:2022-02-05

专利汇可以提供Microprogram control system专利检索,专利查询,专利分析的服务。并且PURPOSE: To make it possible to fulfill an arithmetic process without increasing memory capacity by providing a control bit for assigning a branch address and by assigning a branch destination corresponding to a program through software.
CONSTITUTION: In case of a branch instruction, branch processing circuit 18 discriminates whether a forecasted address is the one where a process is executed actually or not and when it is wrong one, the execution of a microinstruction is interrupted and rereading from the memory at a correct address is commanded. Namely, bit BAS to allow the microprogram to assign a branch address and output MATCH of comparator 17 are OR-ELSE-ed by circuit 18 and when its output is "1", the execution of the microinstruction forecasted and read out is interrupted and a command to read out newly a correct microinstruction is sent out to instruction decoder 12. Consequently, an arithmetic process can be fulfilled without enlarging memory capacity.
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