Control method and apparatus for controlling the data flow rate

Details Control method and apparatus for controlling the data flow rate Control method and apparatus for controlling the data flow rate

1988-12-27

1993-08-17

Lee, Thomas C.

Boots, shoes, and leggings

364239, 3642391, 36423951, 364240, 3642409, 3642423, 3642426, 36424292, 364DIG1, 364939, 3649394, 36494071, 364937, 3649354, 36493541, 364DIG2, G06F 506

Patent

active

052376605

ABSTRACT:
A circuit for use with a SCSI interface for controlling synchronous data transfers into an attached FIFO memory. The circuit uses a comparator to keep track of the number of FIFO locations available by starting with a threshold value, which represents the locations available initially, and comparing the net number of FIFO locations filled to the threshold value. The net number of FIFO locations filled is kept by a counter which counts the difference between the words transferred into the FIFO and the words transferred out of the FIFO. The threshold value is an adjusted offset value if the SCSI interface is operating in INITIATOR mode, and the FIFO size if the SCSI interface is operating in TARGET mode. When the comparator determines that the FIFO is filled, it pauses the current synchronous message by withholding an ACK in the INITIATOR mode or a REQ in the TARGET mode.

REFERENCES:
patent: 3968478 (1976-07-01), Meusch, Jr.
patent: 4028666 (1977-06-01), Suzuki et al.
patent: 4152762 (1979-05-01), Bird et al.
patent: 4210959 (1980-07-01), Wozniak
patent: 4393464 (1983-07-01), Knapp et al.
patent: 4449202 (1984-05-01), Knapp et al.
patent: 4454595 (1984-06-01), Cage
patent: 4536872 (1985-08-01), Lahti
patent: 4692894 (1987-09-01), Bemis

Affiliated with

Also associated with

Rating

Control method and apparatus for controlling the data flow rate does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with Control method and apparatus for controlling the data flow rate , we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Control method and apparatus for controlling the data flow rate will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-2251138