USING THE IDE HARD DISK INTERFACE ON THE XST-3.0 BOARD
    This is a simple design example that writes data to sectors on an IDE
    hard disk and then reads it back to verify it.

DESIGN FILES
    * common.vhd
        This file contains some definitions and functions used in the rest
        of the VHDL code.

    * atacntl.vhd
        This is the VHDL file that describes an ATAPI interface to an IDE
        hard disk. You can get a more detailed description of the interface
        at http://xess.com/appnotes/an-041404-atacntl.pdf .

    * memtest.vhd, randgen.vhd
        These VHDL files describe a memory tester module that writes a
        stream of data from a random-number generator (RNG) to a storage
        device and then reads the data back and compares it to the RNG
        output to verify it was stored correctly.

    * debounce.vhd
        This VHDL file describes a simple switch debouncer.

    * ide.vhd
        This is the VHDL file that combines the IDE interface and memory
        tester module to create a design that tests writes and reads of hard
        disk sectors.

    * ide.ucf
        These are the constraints which assign the I/O signals of IDE
        interface to the appropriate pins of the FPGA on the XSA-3S1000 +
        XST-3.0 combination.

    * ide.bit
        This is a compiled bitstream for the design that can be downloaded
        into the XSA-3S1000 + XST-3.0 combination.

    * ide-200.ucf
        This is an alternate set of pin assignments to be used if the design
        is recompiled for an XSA-200 + XST-3.0 combination.

    * ide.npl
        Open this project file with WebPACK if you need to recompile the
        design.

USING THE DESIGN EXAMPLE
    * Step 1:
        Attach an ATX power supply to the XST-3.0 Board and an IDE hard
        disk.

    * Step 2:
        Attach an IDE cable from header IDE1 on the XST-3.0 Board to the IDE
        hard disk.

    * Step 3:
        Set jumper J9 on the XSA-3S1000 Board to XS.

    * Step 4:
        Download the default parallel port interface into the XSA-3S1000
        (\XSTOOLS\XSA\3S1000\dwnldpar.svf) if it is not already present.
        (Running GXSTEST will do this automatically.)

    * Step 5:
        Download the ide.bit file to the XSA Board.

    * Step 6:
        After a 20-second delay, the application will write and read sectors
        on the hard disk and report the success or failure of the operation
        by displaying an "O" or an "E" on LED2, respectively. Press switch
        SW2 on the XSA Board to re-run the test.

ENVIRONMENT
    This example design was developed using the following version of
    software:

       Xilinx WebPACK       : 6.3.03i

SOURCE FILES
    You can download the source files for this example design from the XESS
    website at http://www.xess.com/projects/xst3_IDE.zip .

AUTHOR
    Dave Vanden Bout, X Engineering Software Systems Corp.

    Send bug reports to bugs@xess.com.

COPYRIGHT AND LICENSE
    Copyright 2006 by X Engineering Software Systems Corporation.

    This application can be freely distributed and modified as long as you
    do not remove the attributions to the author or his employer.

HISTORY
    05/30/2006 - Release 1.0.1:

    *   Added multisector R/W.

    *   Added PIO Mode 2 timing parameters.

    *   Added enhanced ATA status outputs.

    *   Added outputs to inactivate the XSA Flash and IDE disk DMA
        acknowledge.

    *   Added a switch input that re-runs the sector R/W test.

    01/30/2006 - Initial release.