Subj : Re: turbo C++ 3.0, bioscom
To   : borland.public.cpp.borlandcpp
From : Bob Gonder
Date : Wed Aug 25 2004 02:08 am

 Bruce Salzman wrote:

>> Biosprint sends data to the printer ports (lpt1, lpt2), which are
>> parallel ports, and their mission in life is to send parallel data.
>
>Of course, each data line is effectively a serial stream of bits. If
>you format the data so that all the interesting bits are in the same
>position...

But serial data is time sensitive. You have to time the bit changes
pretty close, and if the user moves the mouse--there goes your timing.
That's an exageration, but it's still quite a chore to get reliable
serial communications out of a port that's not built for it.

Also, RS232 is supposed to be +-15 volts. Don't remember what parallel
ports put out.

.