On Sun, Feb 05, 2006 at 12:36:22AM -0800, William Chops Westfield wrote:
> 
> On Feb 4, 2006, at 1:40 PM, Byron A Jeff wrote:
> > Most of the reports that I have read have indicated that the
> > modem pins of a USB to serial converter cannot be controlled
> > with the same precision as a traditional serial port.
> 
> It's worse than that.  With modern (preemptive, multitasking)
> operating systems, it's becoming difficult to precisely control
> the bits of a serial or parallel port even if you have native
> hardware.

All true. That's why I've reduced the problem to TX and RX only.
They at least can be trusted to behave.

>  We need something like a stream-based semi-realtime
> bit-wiggling protocol, and then it could be run over serial,
> USB, IRDA, Bluetooth, zigbee, or ... anything.  Unfortunately,
> I'm not sure that anything short of some sort of code interpreter
> on the destination would do the trick.  (Of course, since such
> an interpreter has been shown to fit in a 16C54, maybe we should
> juts byte the bullet and write a spec for such code...)

Possibly. However the chicken and egg to get such code into such
a chip (or set of chips) without having one first still exists.

BAJ
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