Boots – shoes – and leggings
Patent
1988-10-05
1990-05-08
Shaw, Gareth D.
Boots, shoes, and leggings
3642513, 36426791, 3649602, G06F 1300
Patent
active
049243829
ABSTRACT:
A debugging microprocessor used in an in-circuit emulator is made to be capable of moving into a debugging interrupt processing execution mode in response to an external supervisor interrupt instruction. This debugging microprocessor comprises a first program counter put in an operating condition when the microprocessor is in a user's program execution mode, a second program counter put in an operating condition when the microprocessor is in a debugging interrupt processing execution mode, and a program counter controller responding to the external supervisor interrupt instruction to cause a content of the second program counter to be outputted as a program counter value. The program counter controller also responds to a return instruction to cause a content of the first program counter to be outputted as a program counter value. Thus, the content of the first program counter can be accessed in the course of the debugging interrupt processing execution.
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patent: 4167781 (1979-09-01), Beccia et al.
patent: 4255786 (1981-03-01), Holtey et al.
patent: 4636945 (1987-01-01), Tanagawa et al.
patent: 4670838 (1987-06-01), Kawata
NEC Corporation
Ray Gopal C.
Shaw Gareth D.
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