Rom initializing apparatus

Details Rom initializing apparatus Rom initializing apparatus

G - Physics

06

F

354/241

G06F 9/00 (2006.01) G06F 9/26 (2006.01) G06F 12/00 (2006.01) G06F 13/00 (2006.01) G11C 7/00 (2006.01) G11C 8/00 (2006.01) G11C 15/00 (2006.01) G11C 17/00 (2006.01) G11C 19/00 (2006.01) G11C 21/00 (2006.01) G11C 27/00 (2006.01)

Patent

CA 1099415

ABSTRACT A method and an apparatus for improving the speed of executing instructions and reducing the microprogram memory requirements in a conventional digital computer system by eliminating a ROM address register for addressing micro- words. The method or apparatus incorporates the use of a predetermined bit position in the microinstruction word which is set to a binary one when the microword is the last microword of an executing microprogram. The apparatus is responsive to the electronic representation of the binary one signal to cause the microinstruction execution sequence to branch to a predetermined location in the microprogram memory for execution of the following microinstruction; thus eliminating one ROM address register and at least one step in returning to a common address for starting the execution of another microprogram. -1-

286565

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