Data transfer control system transferring command data and statu

Details Data transfer control system transferring command data and statu Data transfer control system transferring command data and statu

1991-04-18

1995-04-04

Bowler, Alyssa H.

395275, 395325, 395375, 395425, G06F 1300

Patent

active

054045487

ABSTRACT:
An I/O buffer arranged in an I/O controller for controlling an I/O unit is constituted by a transmission FIFO buffer and a reception FIFO buffer. Each of the transmission and reception FIFO buffers is constituted by paired transfer data storage areas and ID information storage areas. ID information represents the type of transfer data. ID information is generated by the ID information generator and is stored in a corresponding area together with transfer data. Command data or write data output from the transmission buffer is supplied to the I/O unit together with its ID information. Data read out from the I/O unit is sequentially stored in the reception FIFO buffer together with ID information. On the basis of the ID information, the I/O unit determines whether the transferred information is a command or data. On the basis of the ID information, the I/O controller determines whether the transferred information is reception data or a status.

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Steven N. Friedman--Intelligent IBM-PC Compatible Boards Support a Variety of MIL-STD-1553 Applications.

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