Auxiliary memory for microprocessor stack overflow

Details Auxiliary memory for microprocessor stack overflow Auxiliary memory for microprocessor stack overflow

1980-12-17

1983-09-20

Shaw, Gareth D.

Boots, shoes, and leggings

G06F 918

Patent

active

044059833

ABSTRACT:
A microprocessor system that provides protection against memory violations by interrupting the central processing unit (CPU). A problem arises when the interrupt itself causes memory violations in push-down stack operations. This problem is solved by providing an auxiliary memory to store stack overflow data. Memory violations are detected (30, 40) and overflow data is written (42, 60, 33, 100) into auxiliary memory, at sequential locations (50, 51, 60). An interrupt signal is returned (30, 20) to the CPU. A stack overflow interrupt program reads the number of locations written (50, 80, 90), and accesses the auxiliary memory (100, 60, 70, 90) to determine and correct the cause of the overflow.

REFERENCES:
patent: 3827029 (1974-07-01), Schlotterer et al.
patent: 4091447 (1978-05-01), Dillion et al.
patent: 4093987 (1978-06-01), Gaudette et al.

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