Control store apparatus having dual mode operation handling mech

Details Control store apparatus having dual mode operation handling mech Control store apparatus having dual mode operation handling mech

1980-09-29

1983-08-02

Thomas, James D.

Boots, shoes, and leggings

G06F 932

Patent

active

043969810

ABSTRACT:
A writeable control store in a data processing system is provided with a dual mode capability. Coupled with the control store in the system is a central processing unit which may provide the next address of the control store's memory dependent upon the mode of the control store. Otherwise, also dependent upon such mode, the control store memory is addressed, dependent upon the results of tests conducted in the central processing unit, by one of at least two alternative addresses. The control words addressed in the writeable control store are used to control the operation of the central processing unit.

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patent: 4075687 (1978-02-01), Nissen
patent: 4077060 (1978-02-01), Bodnek
patent: 4080659 (1978-03-01), Francini

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