Hi,

after studying the documentation in MS Visual C++ I still do not
understand how to pull up the TxD line (i.e. pin3 in a 9 pin RS232)
in the serial Com-port. In old
times this has been done by output of 64 to the base address+3 of
e.g. Com1. The DCB class does not seem to address this.

I want to provide power by TxD to an a/d converter.

Regards
Christoph Kessler
Aachen, Germany