Alternative Hardware Design for Floppy Interface
dkelvey at hotmail.com
Sun Oct 21 09:41:47 CDT 2007
> From: geoffr at zipcon.net> > This may be a silly question, why not interface a 1793 to a> PIC/microcontroller with USB support?> > Hi
I think this has been answered several times.
Not all formats can be read with standard controller chips.
I have several that fall under that type of problem.
To make it truly useful, it needs to read the timing
of the pulses. It can then use various rules to decode
into data or simply keep it as timed data, depending on
To do this, the tool needs to be able to over sample
with enough resolution. Because of the nature of FM/MFM,
one needs to over sample 6 to 8 times the bit rate.
As David suggested, something like a BlackFin processor
would be good. It is designed to handle USB, runs at 400MHz
instruction rate from its cache and has a clocked serial port that
is able to sample a large amount of data at rates up to
80 MHz clock.
Unlike a current x86 processor, it is designed to have
more determinist execution times and can keep up with
large data transfer rates.
Help yourself to FREE treats served up daily at the Messenger Café. Stop by today.
More information about the cctalk