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[avr-gcc-list] Off topic question - 3 1/2 PC Floppy drive


From: hamilton
Subject: [avr-gcc-list] Off topic question - 3 1/2 PC Floppy drive
Date: Sun, 30 Jun 2002 11:27:14 -0600

Javier,

        This topic has been covered so often in the usenet news groups.

        The bottom line is you CAN NOT do it with a single chip anything.

        The 512 byte sector is only the beginning. Reading the FAT and directory
        structure of the floppy is also needed.

        Decoding the FAT table so you can read where the next sector is located.
        This is not for the faint of heart ( or programmer ).

        This is why you do not see any floppy disk controllers on embedded 
systems.
        ( except x86 type )

        I have built floppy based systems in the old days with 6502, Z80, and 
8088.
        Floppy controllers were abundant days past, but not now.

        The only single chip floppy controller I have found is from SMSC corp.

        http://www.smsc.com/main/catalog/fdc37c78.html

        Before you go running off and say " I can do this", please be aware 
others
        have tried ( myself included ) and we have given up. Not worth the time.

        Sorry

        donaldV


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