Using LPT1 as a COM PORT

[Brian Gustafson]

I need TWO comports, I am trying to capture what is being sent through a comport from both directions.
If I had a laptop with two comports, that would solve the problem, but I don't. I am tryin to work
with what I got. Is it possible to use the printer port as a COM PORT just to get the information and
send it back out through the COM port and viceversa. (COM --> Printer port)

Any thoughts would be a great help!


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[stephane fonteyne]

Hi guy,

Use NTPort.DLL or PORTS16.PBU

Greetz
Stephane

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ICQ: 123632482

[David J Walker]

I dont think you can use a printer port as a COM port, LPT ports
use TTL voltage levels (0/5 V., COM ports use +/- 12V, that is the
only reason you have -12V on a PC power supply.
Do you have USB? If so, you can get a plug-in to give various
additional ports.


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[Mel Bishop]

Not only do you have incompatable power requirements but the
parallel port processes 8 bits at a time. Hence it has 8 lines
(plus handshaking, etc). A serial port has only one line.

Now for the good news: There are Serial<->Parallel bi-directional
converters on the market. Don't see why you couldn't use one to
feed-back to the COMx or LPTx.


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