Re: TI-H: Parallel Link Problem.


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Re: TI-H: Parallel Link Problem.




I have my Parallel link included with my expander.  Pins 14-21 function as
the module port.  it includes a 5v power supply.  If I were to use some
transistors on pins 12 and 13, would that pull the power up high enough? 
Also, would it fail the link tester program if it was only a problem with
power?  Or is my only problem that it is too fast?  Yes, I've check all the
connections, and nothing is touching.

----------
> From: David Knaack <dknaack@hotmail.com>
> To: ti-hardware@lists.ticalc.org
> Subject: Re: TI-H: Parallel Link Problem.
> Date: Wednesday, August 05, 1998 10:50 AM
> 
> 
> >I have a problem with my link.  I ran the test program, and it 
> returned:
> <snip>
> 
> Make sure your components are all in right and the connections
> are good.  I had similar results with the parallel link, problem
> was a loose connection.  After I got that fixed it worked fine.
> 
> If everything looks right, maybe you could use a multimeter
> to measure the current output from each pin to ground.  Anyone
> know what is required?
> (This will require setting the pins high, might have to
> write a program to do that, I don't know what the idle state is.
> If the link program is active it may set them high ( to keep the
> calculator from slowing down)).
> 
> DK
> 
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