Data processing unit having a plurality of hardware circuits for

Details Data processing unit having a plurality of hardware circuits for Data processing unit having a plurality of hardware circuits for

1974-04-26

1976-02-24

Shaw, Gareth D.

Communications: electrical

Digital comparator systems

G06F 918, G06F 916, G06F 910

Patent

active

039407454

ABSTRACT:
A data processing unit having a plurality of hardware data processing circuits each one including a program counter register for addressing the microinstructions, an accumulator register and an addressing register for storing the addressing of the operands of the microinstructions. Means are provided for switching the CPU from the hardware data processing circuits having a predetermined priority level to the hardware data processing circuits having a less priority level, by executing a particular microinstruction, which includes information either about the changing of the priority level or about the memory address of the starting microinstruction of the microprogram to be executed on the less priority level.

REFERENCES:
patent: 3333252 (1967-07-01), Shimabukuro

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