System and method for eventless detection of newly delivered...

Details System and method for eventless detection of newly delivered... System and method for eventless detection of newly delivered...

2006-01-17

2006-01-17

Peyton, Tammara (Department: 2182)

Electrical computers and digital data processing systems: input/

Input/output data processing

Input/output access regulation

C710S030000, C710S031000, C710S033000, C710S038000, C709S238000, C709S246000

Reexamination Certificate

active

06988150

ABSTRACT:
A shared I/O subsystem that includes a plurality of I/O interfaces for coupling a plurality of computer systems where each of I/O interfaces communicatively couples one of the computer systems to the shared I/O subsystem. The shared I/O subsystem receives, at a first one of the I/O interfaces, a data packet from one of the computer systems coupled to the first one of the I/O interfaces where the data packet has a variable length, arranges, at the first one of the I/O interfaces, the data packet into an internal format where the internal format has a first portion that includes data bits and a second portion that includes control bits, receives the data packet in a buffer in the shared I/O subsystem where the second portion is received after the first portion, verifies, with the shared I/O subsystem, that the data packet has been completely received by the buffer by monitoring a memory bit aligned with a final bit in the second portion of the data packet, and transmits, in response to the verifying, the data packet to another one of the computer systems coupled to a second one of the I/O interfaces.

REFERENCES:
patent: 5060229 (1991-10-01), Tyrrell et al.
patent: 6115776 (2000-09-01), Reid et al.
patent: 6629166 (2003-09-01), Grun

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