Technical Disclosure Bulletin
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`Vol. as No. 05 May 1995
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`VOLUME 38 - NUMBER 05 - MAY 1995
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`IBM Technical Bulletin is published monthly by International Business Machines Corporation, Thornwood. NY 10594.
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`_ Technical Disclosure Bulletin Vol. 33 No.05 May1995
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`Communication Method between Devices through FDD Interface
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`Pseudo FDD device
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`+--..._.........._--_......_+
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`+-—- Format Signal
`Generator
`+————————————— —-+
`
`--+
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`Disclosed is a method for communicating between devices through Floppy Disk Drive (FDD)
`. Interface which can be implemented via serial data. lines, such as Write Data and Read Data. The
`FDD Host Controller compares a requested address and a address from the FDD in Read/Write
`operation. Only when the addresses are matched, the FDD Host Controller reads data on the
`data frame preceded by the address or writes data there.
`In the communication method through
`the FDD Interface, the sector data from the FDD, such as ID and DATA field iriformation, are
`handled as packet data; ID field as packet header and data field as packet data. The packet header
`has the packet attributes to indicate data type ir1 the packet data. The Figure shows the block
`diagram of the subject method.
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`6 Address Generator generates the address iriformation compatible with FDD ID information.
`It indicates packet attribute; Command Packet, Status Packet, Device Information Packet and
`Data Packet.
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`© IBM Corp. 1995
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