Data processor providing fast break in program execution

Details Data processor providing fast break in program execution Data processor providing fast break in program execution

1995-11-07

1997-07-01

Teska, Kevin J.

Boots, shoes, and leggings

3642329, 3642421, 3642632, 364DIG1, G06F 944, G06F 946

Patent

active

056447035

ABSTRACT:
A circuit by which an SWI instruction held in a memory circuit is switchedly input in response to a signal supplied externally is provided in a processor, whereby the substitution of a program word can be realized using such an internal circuit, so that a high-speed and reliable break in program execution can be effected. Moreover, an interrupt function separate from normal interrupts is established by setting a specified operation mode, whereby, when a data processor is used as an emulator, the break of a user program including the ordinary interrupt processes can be easily effected by utilizing the special interrupt function. Also, by additionally providing the function of delivering out a signal indicative of the break status, an external circuit can be simplified.

REFERENCES:
patent: 4338660 (1982-07-01), Kelley et al.
patent: 4635193 (1987-01-01), Moyer et al.
patent: 4656578 (1987-04-01), Chilinski et al.
patent: 4674089 (1987-06-01), Ponet et al.

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