RS232 output voltage and I/O configuration

Hello,

I plan to connect a DIY circuit to the mini 6410 via the rs232. I would
like to keep my circuit as simple as possible so I actually do not plan to
use serial data.

I have read from many sources that only pins 2 and 3 actually need serial
data (with ground pin of course). Other pins actually act as parallel pin
(1 bit per pin). I plan to use this feature so I don't need to use a
microcontroller or whatever to serialize the data.

So I have some questions about that:

1. Is it even possible? Like input logic 1 on pin 1 (Carrier Detect pin)
and write a code that will read the input. By the way, I have Android 2.3
installed on my mini 6410.

2. What is the output voltage level of the mini 6410's serial port? Because
I plan to use the output voltage as power supply to drive three bipolar
transistors so I don't need to use an external supply.

Thanks and I would really appreciate any answer. :)

Hello again, I looked up for the hardware specs of the mini 6410 at
http://www.friendlyarm.net/dl.php?file=mini6410_overview.pdf

It says some pins like 1 and 4 are NC. I don't know what that means. At the
bottom of the specs table it says:

Note: NC means floating

Does that mean these pins are not connected to the board and that there's
no way to control them? :(((  If so, what could be the possible alternative
ports I could use? How about the GPIO?