Central processing unit with improved ALU circuit control

Details Central processing unit with improved ALU circuit control Central processing unit with improved ALU circuit control

1978-10-23

1982-04-06

Smith, Jerry

Boots, shoes, and leggings

364200, 364768, 364787, G06F 750

Patent

active

043239811

ABSTRACT:
An information processor is provided with a plurality of ALU chips under control of a microprogram and an ALU control circuit for controlling the ALU chips. The ALU control circuit responds to data bus information given thereto to select an ALU chip from which flag data is outputted. The ALU control circuit controls the ALU chip specified by the data bus information to operate it. When a carry is produced in the selected ALU chip, a carry generator is so controlled to produce a given carry signal toward a given ALU chip.

REFERENCES:
patent: 3984670 (1976-10-01), Erickson et al.
patent: 3987291 (1976-10-01), Gooding et al.
patent: 3988717 (1976-10-01), Kisylia
patent: 4161784 (1979-07-01), Cushing et al.
Advanced Micro Devices, Inc., "AM2900 Bipolar Microprocessor Family Data Book", pp. 17-18, Copyright 1976.
Advanced Micro Devices, Inc., "AM2900 Learning and Evaluation Kit User's Manual", pp. 1--1 to 3--3, Copyright 1976.
Advanced Micro Devices, Inc., "AM2900 Bipolar Microprocessor Circuits", pp. 1-15 and 28-33, Copyright 1975.

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