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

[Iztok Zupet]

Hi,

 You can't tie an ATMega directly, You need a floppy controller chip, which 
can be opreated without DMA (like the old FD1791). The data You get/put to 
the floppy drive there is FM-MFM modulated and the controller does the 
modulation/demodulation!!!

 But You could tie the ATMega to an IDE bus device (IDE floppy-not cheap or 
CompactFlash-cheap device for instance) using only 8 bit data bus width. They 
all operate fine in so called PIO mode. 

Regard
iz


On Sunday 30 June 2002 02:57, address@hidden wrote:
> I really appreciate your help however I still want to use
> the floppy drive+ 3 1/2 floppy so based on what I understand
> I should use an ATmega + enough RAM  to read a sector wich is 512 bytes
> length. Besides I would like to find out  the standard for how to perform
> basic floppy operations such as read, write or move the head using
> the signals on the 34-pin connector. Does anyone know of a
> white paper or specification of some kind detailing this
> in the form of timing diagrams etc.?
>
> Javier.


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