MICROPROGRAM CONTROL SUBSYSTEM
A microprogram control subsystem discloses two control stores, one of which is accessed and utilized only on the first cycle of a microprogram sequence utilized to execute an information handling system instruction. A portion of the operation code of the system instruction is used to address the fir...
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Main Authors | , , |
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Format | Patent |
Language | English |
Published |
26.03.1974
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Subjects | |
Online Access | Get full text |
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Summary: | A microprogram control subsystem discloses two control stores, one of which is accessed and utilized only on the first cycle of a microprogram sequence utilized to execute an information handling system instruction. A portion of the operation code of the system instruction is used to address the first-cycle control store to provide access to a microinstruction having fewer binary bits than normal microinstructions, and is effective to direct access to the remainder of the microprogram sequence contained in the other control store. |
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Bibliography: | Application Number: US19720317961 |