Communications: electrical – Digital comparator systems
Patent
1975-03-26
1977-01-04
Shaw, Gareth D.
Communications: electrical
Digital comparator systems
G06F 916, G06F 919
Patent
active
040017885
ABSTRACT:
A microprogram control system includes first and second control stores. The first is a pathfinder control store which is addressed initially by the operation code of a program instruction for read out of first and second addresses. The first address is used for accessing a standard microinstruction sequence during a first phase of operation. The second address is used for accessing an execution microinstruction sequence during a second phase of operation, both phases being required for executing the operation specified by the operation code of the program instruction. Means coupled to the second control store enable the control store to return to the standard microinstruction sequence following the completion of the second phase of operation when the instruction being executed requires the completion of additional operations before its execution can be terminated.
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Patterson Garvin Wesley
Porter Marion G.
Driscoll Faith F.
Honeywell Information Systems Inc.
Reiling Ronald T.
Rhoads Jan E.
Shaw Gareth D.
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