Microprogrammed systems software instruction undo

Details Microprogrammed systems software instruction undo Microprogrammed systems software instruction undo

G - Physics

06

F

354/198

G06F 9/30 (2006.01) G06F 9/38 (2006.01) G06F 11/14 (2006.01)

Patent

CA 1287177

ABSTRACT In a data processing system using a virtual memory addressing scheme, certain software instructions call for the virtual address to be stored in a base register. The virtual address stored in the base register is incremented or decremented during the read out cycle of the previous operand to address the next operand. If the operand is not in physical memory, then the contents of the base register is restored to its original value.

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