I have a problem that only happens when using a real 16C74 and not when
using the PICMASTER.  I went through every errata sheet I could find and
didn't find anything about the problem I've encountered.

I have the read/~write from a 2X20 character LCD connected to RA3 on a
16C74. When measured at the LCD (or at the PIC), the pin would be low all
the time when using the PICMASTER. This is correct as I only write to the
LCD. But when using a 16C74/JW, the pin would be high. This would put the
LCD in read mode when I'm trying to write. This is how I found the problem
as I found a bus contention on one of the LCD data lines.
I pulled RA3 from the /JW out of the socket and measured it again. It was
low, so something was pulling it up. It turns out to be the LCD. I put my
scope on RA3 (while disconnected from the board) and as far as I can see,
its tri-stated. If I put a 10 K pull up on it, its goes to 5v. I have tried
several JW parts so I can't believe its a bad part. It would seem that RA3
is configured as an input. But Port A is definitely configured as an output,
its configured as all digital, and RA3 is set low. I didn't see anything
with the A/D that would force it to an input.  I clear TRISA (all outputs)
once in the beginning of the program and I don't change it.
I just don't see what could be causing this. What am I missing? Any ideas
would be greatly appreciated.

Thanks in advance!

-----------------------------------------
                 Mike Montalvo
          G-FORCE Motorsports
http://www.g-forcemotorsports.com
                516-794-0858