Masked data fetch and modifying device

Details Masked data fetch and modifying device Masked data fetch and modifying device

G - Physics

06

F

354/238

G06F 9/38 (2006.01) G06F 9/312 (2006.01) G06F 13/38 (2006.01)

Patent

CA 1226962

MASKED DATA FETCH AND MODIFYING DEVICE Abstract of the Disclosure A data reading and modifying device of a computer system has a main storage for storing first data, portions of which are to be modified by various modifying data. The access speed of the main storage is slower than the speed at which the modifying data is accessed. A controller initiates fetches of first data from the main store and selects the modifying data. A register is coupled to the main storage for receiving and storing first data as it is provided from the main storage. Portions of the register are reserved for modifying data which is preferably inserted into the register before receipt of the first data as controlled by the controller. The first data received from the main storage is inserted into remaining portions of the register and insertion of, first data into portions reserved for modifying data is inhibited, such that modified data is available without a write back to the main storage location of the data to be modified.

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