WRITING TO COM PORT USING HANDLES

WRITING TO COM PORT USING HANDLES

[regis piccand]

Hello all,

I'm trying to write to Com port (COM1, COM2) with file handle (I open the file 
with dos interruption 16  # 3D #. It works fine ... I can easily write and 
read to the handle (this is write and read to Comx).

The only problem I get is that the CR/LF pair, when encountered in reading 
from com port handle, stops the reading process. It doesn't do this if I read 
from a normal file handle (not a Com port).I can read and write files without 
problems, as long as it doesn't read from the handle of a Com port, in which 
case in reads only the first line (or stops at CR LF in binary files).

This might be due to the fact that Com port are by default in "cooked" mode, 
which cannot be changed using dos interrupt 16 # 44 #, due to the fact that 
Com port is a peripheral (bit 7 = true), and not a simple file.

Anybody could help on this matter ?? 

Is this problem really due to "cooked" vs "raw" mode, or is it something else 
??

Any help would be very much appreciated ...

Please email     rejo@bluewin.ch

Thanks in advance and greetings from Switzerland

Regis Piccand
Hotel-de-Ville
1641  Vuippens
Switzerland

tel. ++ 41 (0) 26 915 15 92
fax  ++ 41 (0) 26 915 30 92

rejo@bluewin.ch
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               Keith Jarrett