Interface control device and computer system for controlling...

Details Interface control device and computer system for controlling... Interface control device and computer system for controlling...

2005-12-20

2005-12-20

Fleming, Fritz (Department: 2182)

Electrical computers and digital data processing systems: input/

Input/output data processing

Concurrent input/output processing and data transfer

C710S030000, C710S032000, C709S227000

Reexamination Certificate

active

06978323

ABSTRACT:
An interface control device controls the packet-type transfer of data between one or more computers and one or more input/output devices. According to one embodiment of the present invention, when the interface control device receives the lead packet in a series of packets from an input/output device, it creates new device control data to control the transfer of the series of packets, and also determines an identification number for the particular series of packet transfers. The interface control device then sends a notification packet, containing the identification number, to the sending input/output device in response to receiving the lead packet. When the interface control device receives a packet that is a second or subsequent packet in the series of packets, it determines whether the data stored in the packet are normal by referring to the device control data corresponding to the identification number stored in the subsequent packet. The transfer control unit continues the data transfer as long as the packets received are determined to be normal. If a packet is abnormal, the transfer control unit ends data transfer and notifies the sending input/output device. The present invention allows the transfer of packets from an input/output device to be interrupted so that data can be transferred from more than one input/output device in a certain amount of time, eliminating the need for input/output devices to wait in standby mode before being able to transfer data.

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