Prefetched operand storing system for an information processor

Details Prefetched operand storing system for an information processor Prefetched operand storing system for an information processor

1992-07-14

1994-02-15

Dixon, Joseph L.

Boots, shoes, and leggings

364DIG1, G06F 1300

Patent

active

052874834

ABSTRACT:
An information processor for prefetching memory operands stored in an external storage device comprises a first storage for storing addresses used for accessing the external storage device; a selector for selecting either an address in the first storage or data read out of the external storage device; a second storage for storing the contents selected by the selector as well as data to be written in the external storage device; a third storage for storing an address read out of the first or second storage; and a controller. When an error occurs in reading data from the external storage device, the controller controls the selector to select the address in the first storage as an error address. The error address is once stored in the second storage and then transferred to and stored in the third storage. When an error occurs in writing data into the external storage device, the controller controls the third storage such that the address in the first storage is directly transferred to and stored in the third storage. The error address stored in the third storage is used for an interrupt process for coping with the error.

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