Microcomputer having an instruction decoder with a fixed area an

Details Microcomputer having an instruction decoder with a fixed area an Microcomputer having an instruction decoder with a fixed area an

1995-02-17

1997-04-08

Bowler, Alyssa H.

Boots, shoes, and leggings

395800, 3642599, 364DIG1, G06F 930

Patent

active

056197144

ABSTRACT:
When a rewriting instruction data is provided to an instruction decoder from a read only memory for a program, the instruction decoder decodes the data and provides an instruction rewriting control signal to a writing block. Thereby, the writing block receives a data following the writing instruction data from the ROM and writes the received data in the rewritable area of the instruction decoder. When an instruction data is provided to the instruction decoder from the read only memory under this condition, an instruction which is different from the instruction therefor output when there is no rewriting instruction is therefor output based on the same instruction.

REFERENCES:
patent: 3987418 (1976-10-01), Buchanan
patent: 4992933 (1991-02-01), Taylor
patent: 5097407 (1992-03-01), Hino et al.
patent: 5278786 (1994-01-01), Kawauchi et al.

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