Serial data hardware solution

[Ken Kelly]

Matt,
	There are several versions of the serial cable posted on the net. They
generally use a four transistor circuit to combine the Xmit & RCV to the single
line. Look at the cable on Andrews web page.

http://www.mindspring.com/%7Eamattei/aldlif.jpg

	I built this cable about 9 month's ago. It works great with the 8051 PCM (94-95
LT1)

		Ken

Matt S Bower 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?