Interrupt control apparatus for a data processing system

Details Interrupt control apparatus for a data processing system Interrupt control apparatus for a data processing system

1982-03-24

1985-05-14

Shaw, Gareth D.

Boots, shoes, and leggings

G06F 912

Patent

active

045176434

ABSTRACT:
A data processing system which include a central processing unit having a program counter, a main memory for storing a return instruction including the contents of the program counter and interrupting inhibiting information and for storing the contents of a general register in the CPU, interruption means for controlling the storage of the return instruction and the general register contents in the main memory upon occurrence of a first interruption, detection means for reading the return instruction stored in the main memory upon completion of the first interruption and for initiating the immediate occurrence of a second interruption in accordance with the inhibiting information of the return instruction read in the main memory, and return means for restoring the return instruction and the general register contents stored in the main memory to the central processing unit in the event that the detecting means determines that there is no further interruption to be accepted.

REFERENCES:
patent: 3909797 (1975-09-01), Goss et al.
patent: 4037204 (1977-07-01), Bennett et al.
patent: 4080650 (1978-03-01), Beckett
patent: 4218739 (1980-08-01), Negi et al.
patent: 4228498 (1980-10-01), Moshier
patent: 4285036 (1981-08-01), Kitagawa et al.
patent: 4296470 (1981-10-01), Fairchild et al.
patent: 4330822 (1982-05-01), Dodson
DEC: Mini Computer VAX 11/780 Hardware Handbook, pp. 59-68.
880 Microcomputer System User's Manual, Sep. 1975, pp. 4-13--Section 4.

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