Command queuing for I/O adapters

Details Command queuing for I/O adapters Command queuing for I/O adapters

1978-10-23

1980-09-23

Krass, Errol A.

Boots, shoes, and leggings

G06F 300

Patent

active

042246679

ABSTRACT:
In a computer system having: an addressable storage for storing instructions, data and input-output (I/O) commands; a central processing unit (CPU) which fetches and executes instructions; and channel means connecting I/O adapters to the storage and the CPU, an apparatus transfers I/O commands to the I/O adapters whereby the I/O command is either accepted immediately or is queued by the I/O adapter. A queued command is taken up by the I/O adapter when no other data transfer operation is pending. To take up a queued command, the I/O adapter initiates a fetch of the pending command by invoking a standard data-transfer-from-storage sequence. The channel means responds to the fetch initiated by the I/O adapter to send the pending command to the I/O adapter.

REFERENCES:
patent: 3514758 (1970-05-01), Bennett
patent: 3566358 (1971-02-01), Hasbrouck
patent: 3623006 (1971-11-01), Balakian
patent: 3725864 (1973-04-01), Clark et al.
patent: 3961312 (1976-06-01), Bodner et al.
patent: 3993981 (1976-11-01), Cassarino, Jr. et al.
"Priority Interrupt Queuing" by Grant et al.; IBM Tech. Discl. Bulletin, vol. 15, No. 10, Mar. 1973, pp. 3046-3048.

Affiliated with

Also associated with

Rating

Command queuing for I/O adapters does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with Command queuing for I/O adapters, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Command queuing for I/O adapters will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-647734