> MK> But why?  If I for an example run a DOS-program and then
 > MK> enters "dir c:\ /s" the program is STOPPED and isn't
 > MK> accepting any characters from the modem = character loss.  I
 > MK> thing that it's a bad solotion.
 >
 > Oh no, this is very different.  The modem is serviced by an interrupt
 > handler, so characters are not missed.  Interrupts continue to be
 > serviced in these conditions.  Also, the video driver is going to return
 > after each write call, usually after each line of text.  As a result,
 > although the system might be very jerky while scrolling, the process that
 > is doing the scrolling will be a candidate for preemption after each line
 > of text.

Okej, maybe they aren't lost.  But the modem stops receiving characters
when I'm doing a "dir c:\ /s".

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