Software trap system which saves previous content of software tr

Details Software trap system which saves previous content of software tr Software trap system which saves previous content of software tr

1987-06-24

1990-07-17

Williams, Jr., Archie E.

Boots, shoes, and leggings

3642443, 3642616, 3642545, 3642422, G06F 900

Patent

active

049425242

ABSTRACT:
A computer has a software trap handling pointer for holding the storing location of the information saved in the memory. At the setting of a software trap, the information containing the content of the software trap handling pointer is saved in the memory by means of a stack mechanism, and a value indicating the saved location is stored in the software trap handling pointer. At the time of a software trap return, the information containing the content of the software trap handling pointer which has been stored at the setting of the software trap is restored by means of the stack mechanism.

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NS16000 Instruction Set Reference Manual, pp. 6-14, National Semiconductor Corp., 1983.

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