Serial data hardware solution

[Peter D. Hipson]

Grumpy is saying connect the serial input to the laptop computer, the
serial output of the laptop computer, and the serial line to the ECM
together. 

At 01:53 PM 10/29/1999 -0500, you wrote:
>
>
>CSH-HQ wrote:
>> 
>> No, what I said is what I recall.
>> What good is grounding the tx rx lines?..
>> Never mind, also the above was about the Max 232/233 chip interface
>> Grumpy
>> 
>> >>I do beleive i've seen all 3 twisted together.
>> >>Tx/Rx/serial
>> >That should read Tx/Rx/Gnd...
>> >
>Bruce, if what you said is right then I'm not understanding what you
>mean by serial.  Tx and Rx are usually the serial lines with a reference
>to a gnd.  If they are tied together with something then what is it? I
>typically tie Tx and Rx together and use that line with ground for
>communications.  If your saying tie these with something else then I
>don't know what it is unless you are referencing the driver enables?
>
>
Thanks, 
        Peter Hipson (founder, NEHOG)
        1995 White NA Hummer Wagon