On 02/18/2011 03:14 AM, Hans-Peter Diettrich wrote:

Quite a bit. Applications don't have to care about such hardware details,

Yep and this is why user land software can't (and should not) detect the point in time the data it issued towards the serial port actually has left the box. These systems (Windows, Linux, Mac) are not supposed to support hard realtime after all.

-Michael

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