Buffer storage and control

Details Buffer storage and control Buffer storage and control

1977-08-10

1979-11-27

Thomas, James D.

Boots, shoes, and leggings

235 92SH, G06F 738, G06F 300

Patent

active

041764005

ABSTRACT:
A re-entrant shift register comprising eight levels and in the illustrative embodiment eight stages per level, is selectively used in the buffering of information between an asynchronous signal source, e.g., a manual keyboard and a data sink, e.g., a controller which accepts information upon an asynchronous basis. Information to be transmitted from a data source to the data sink is entered in parallel in a register in the form of a latch under control of write control circuitry. Similarly, data to be transmitted to the asynchronous data sink is temporarily stored in a parallel output register in the form of a latch. The writing of information into and out of the output latch is under the control of read control circuitry. The write control circuit includes a write counter and the read control circuit includes a read counter. These counters are advanced by a common clock signal which is further utilized in the gating of information within the write control and read control circuits and in the control of the shift register. The shift register and the attendant input and output circuitry is arranged such that an information word can be selectively routed directly between the input latch and the output latch to eliminate the delay incurred in traversing the shift register whenever the input and output data rates are such that buffering is not required. Additionally, where the input information indicates that an input data word is being repeated, the information is gated directly from the input latch to the output latch independently of the rate at which the input signals occur.

REFERENCES:
patent: 3328772 (1967-06-01), Oeters
patent: 3351917 (1967-11-01), Shimabukuro
patent: 3501746 (1970-03-01), Vosbury
patent: 3755788 (1973-08-01), Finch
patent: 3827028 (1974-07-01), Kashio
patent: 3836891 (1974-09-01), McDaniel
patent: 3896417 (1975-07-01), Beecham
patent: 3903509 (1975-09-01), Picandet
patent: 3919694 (1975-11-01), Tung
patent: 4064557 (1977-12-01), Bluethman

Affiliated with

Also associated with

Rating

Buffer storage and control does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with Buffer storage and control, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Buffer storage and control will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-805200