Is there a trick to make the RA4 pin on a 16C84 an output.
I have the PIC connected to an 8 BIT ADC, if I read the ADC and
then send a HI to either RA0 throught to RA3, depending on
the value recieved from the ADC,

0       to      63      = HI on pin RA0 only.
64      to      128     = HI on pin RA1 only.
129     to      191     = HI on pin RA2 only.
192     to      255     = HI on pin RA3 only.


everything works fine, BUT when I try and use RA4 as well,

0       to      50      = HI on pin RA0 only.
51      to      100     = HI on pin RA1 only.
101     to      150     = HI on pin RA2 only.
151     to      200     = HI on pin RA3 only.
201     to      255     = HI on pin RA4 only.

everything works fine UNTIL the value from the ADC is in the
201 to 255 range and the RA4 pin changes from the LOW to an
open state, neither HI or LOW, but it seems to work right in
MPLAB simulator. If it matters I am using a 4Mh crystal and
only set the Power Up Timer fuse. I am sure the port is
initialised for output and MPLAB simulator also shows this.

Thanks

Dean.

(-;     Why are there flotation devices under plane seats
        instead of parachutes?

;-)

PS. I am fairly new to programming and this is only my second
PIC program.I actually wrote it in a language called SIL,
similar to Pascal/Basic. Thanks Lars Silen for this Free Software.
http://koti.kolumbus.fi/~larsil/pcomp.htm.

I also used a love my Logic probe from Peter Anderson:
http://www.access.digex.net/~pha/index.html
you get a PIC 12C508 or 509 that is hooked to an LED that is lit
brighty when probe is connected to HI, off when connected to LOW,
and dimly when not connected to either, and pulses when on a
pulsing line. It also has two clock output pins, a once a second
and a 10 a second clock output. I ran my 16C84 off of these and
could count the pulses being sent to my ADC.(could count 7 IO/CLK
pulses to ADC when I should have been sending 8, Doh!).