Excavating
Patent
1996-11-26
1998-08-25
Palys, Joseph
Excavating
395584, 39518206, 371102, G06F 1100
Patent
active
057991448
ABSTRACT:
There is a problem that a mechanism for patching a bug of a program stored in a ROM does not function correctly when a queue buffer for prefetching an instruction is provided. According to a microcomputer of the present invention, a comparison circuit compares address information stored in a register with address data on an address bus and a latch circuit is put in a set state by a match signal activated by the comparison circuit and put in a reset state by a branch-generation signal or a JMP-instruction-code end signal. In the reset state, an operation to output data from a JMP-instruction-code ROM to a data base is disabled.
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Electronics, "Ferment in Microcontrollers," pp. 59-60, Oct. 1, 1997.
Mitsubishi Denki & Kabushiki Kaisha
Palys Joseph
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