On Mon, Apr 19, 2010 at 05:53:56PM -0500, Matt Mackall wrote:
quoted text
> > This seems like a very large abuse of the 'I know, let's bit-bang the
> > data out by hand' principle.  For such strict timing requirements, it's
> > almost always better to just build a simple piece of hardware to handle
> > it for you.
> > 
> > Is this a new device out in the wild, or something very old?
> 
> Something very old. It's for talking to Commodore floppy drives over a
> hand-made parallel port cable, presumably for recovering very old data.

Ah, ok, good.

quoted text
> Nonetheless, I think this can be handled on reasonably modern hardware
> with an appropriate mix of polling in a real-time thread (waiting for
> high-precision clock edges) and high-res timers (all other timeouts).

That sounds very reasonable.

greg k-h
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