Process management structures and hardware/firmware control

Details Process management structures and hardware/firmware control Process management structures and hardware/firmware control

1974-12-02

1978-04-11

Nusbaum, Mark E.

Boots, shoes, and leggings

G06F 1516, G06F 918

Patent

active

040842282

ABSTRACT:
A system and method for computer process dispatching in a multiprogramming/multiprocessing environment is disclosed. Each process in the multiprogramming/multiprocessing computer system may be in one of four states at any given time as follows:
1. Running -- the process is in control of the computer system and is directing the operation of the central processing unit (CPU);
2. ready -- the process is ready to run as soon as it is given control of the CPU;
3. waiting -- the process is waiting for an external event to occur so it can either resume running or enter the ready state;
4. Suspended -- the process has been temporarily stopped (from a source external to the process).
The dispatcher is a firmware/hardware structure that controls the first three states of the process--i.e. running, ready and waiting states.

REFERENCES:
patent: 3328771 (1967-06-01), Blaauw et al.
patent: 3559187 (1971-01-01), Figueroa et al.
patent: 3593314 (1971-07-01), Moll
patent: 3599162 (1971-08-01), Byrns et al.
patent: 3665415 (1972-05-01), Beard et al.
patent: 3665487 (1972-05-01), Campbell et al.
patent: 3699530 (1972-10-01), Capowski et al.
patent: 3725864 (1973-04-01), Clark et al.
patent: 3825902 (1974-07-01), Brown et al.

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