Need Serial Comm port help!!!

[Ludis Langens]

Raymond Brantley wrote:
> 
> Actually that is more of an explanation of the Windows NT HAL (hardware
> abstraction layer). Win9x does allow programs to access the hardware
> directly (one of the reasons it is less stable).
> 
> -----Original Message-----
> Under Win98, programs cannot directly access the hardware, even when in
> DOS mode.  However, the OS catches these accesses and passes them on to
> the real hardware.  As a result, most programs keep working fine.  The
> problem is that the simulation takes longer (much longer) than the
> original direct hardware access.

I found the Usenet thread:  Even Windows 95 does not allow direct
hardware access by programs.  The OS intercepts the input and output
instructions and then turns around and does the hardware access for the
program.  The result is that it looks like it isn't protecting tha
hardware, except that it is in the way slowing things down.  One of the
participants of the thread uses the imperfect emulation to detect Windows.

-- 
Ludis Langens                               ludis (at) cruzers (dot) com
Mac, Fiero, & engine controller goodies:  http://www.cruzers.com/~ludis/
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