From: Jason Green <news AT jgreen4 DOT fsnet DOT co DOT uk>
Newsgroups: comp.os.msdos.djgpp
Subject: Re: hex bytes thru BCSerio
Date: Mon, 30 Jul 2001 22:25:56 +0100
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"Rinkle Roff" <esusx AT hotmail DOT com> wrote:

> ahlan,
> 
> i am trying to use BCSerio to send bytes of hex to my serial port.
> using 8-N-1, i want to specify each of the data bits as high or low.
> 
> BCSerio lets me send chars to the com port.  I could convert the hex
> i want to send into ascii, then send it, but but ascii chars go up to 0x7f.  
> if i wanted to send 0x9b, or some hex byte that doesn't have
> an ascii equivalent, i'd be stuck.

I haven't used the BCSerio library myself, but it sounds like you are
looking for unsigned char.  That gives you the range 0x00-0xff and is,
generally speaking, what you want for serial comms.