26 Jun
2012
26 Jun
'12
10:37 a.m.
On 26 Jun 2012 at 12:49, Dave McGuire wrote:
I would think that a bit of analog hardware could
generate the
signals to mimic flux transitions. At that point, the microcontroller's only
high-speed-requiring job would be generating the encoding, which isn't
tough for a fast one.
No analog needed at all (at least not in the pure sense)--the signals
are RS422-differential type that requires some transceivers not
usually part of a modern microcontroller. The control signals are OC
TTL levels, just like a floppy.
Using an 8MHz AVR to generate floppy MFM worked just fine, so an
80MHz PIC32 or ARM should be up to the job--I'm using the former,
simply because it's a bit easier.
--Chuck