Dual port access circuit with automatic asynchronous contention

Details Dual port access circuit with automatic asynchronous contention Dual port access circuit with automatic asynchronous contention

1982-10-01

1986-10-28

Heyman, John S.

Electrical transmission or interconnection systems

Nonlinear reactor systems

Parametrons

307470, 307514, 328109, 364200, H03K 1728, H03K 526

Patent

active

046201181

ABSTRACT:
Two microprocessors, which may be operating asynchronously, share a random access memory (RAM) array; that is, at any one moment of time, either microprocessor can seek access to the RAM but only one of them can actually gain access at a time. Priority of access to the RAM is controlled by a dual port contention-resolving access circuit which enables such access alternately to the two microprocessors when both are seeking (overlapping) access, subject to the stipulation when neither microprocessor is accessing the RAM that the very next access will be allocated by the circuit on a first-come first-served basis, and will be allocated to a preselected one of the microprocessors if both microprocessors will commence to seek access precisely at the same time.

REFERENCES:
patent: 3444470 (1969-05-01), Bolt et al.
patent: 3813604 (1974-05-01), Denoncourt
patent: 4164787 (1979-08-01), Aranguren
patent: 4354227 (1982-10-01), Hays, Jr. et al.
patent: 4355354 (1982-10-01), Kempf et al.
patent: 4398105 (1983-08-01), Keller
patent: 4415972 (1983-11-01), Adcock
patent: 4422142 (1983-12-01), Inaba et al.
patent: 4443846 (1984-04-01), Adcock
J. Nadir et al, "Dynamic-RAM-Controller Orchestrates Memory Systems," Electronics, Sep. 8, 1982, pp. 128-133.
S. Libes, Fundamentals and Applications of Digital Logic Circuits, 1975, pp. 102-105.

Affiliated with

Also associated with

Rating

Dual port access circuit with automatic asynchronous contention does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with Dual port access circuit with automatic asynchronous contention , we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Dual port access circuit with automatic asynchronous contention will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-1348576