Joe and et al,
     I checked my wiring more times than I can keep track of. I am using=20
RA0 to RA2 for the three control lines. I have not connected to RE0, Pin=20
1 and Joe you are correct that RA4 is open collector but RA0 is supposed=20
to able to source and sink current. I have checked the datasheet several=20
times just to make sure. I have been thinking about connecting the r/s=20
line to a different pin. I wish I had another 4550 to test. But I only=20
have the one. I also wish I had an ICD instead of just the PICKit2.
Thanks,
rich!

On 10/23/2015 4:01 AM, IVP wrote:
>> I am wondering if you have messed up the RA port initialisation
>> so that the rs pin is open collector without a pullup
> I wondered that too (a4 is usually the culprit). Richard is using a0,
> which is right next to input-only e3 / mclr
>
> Joe
>
>
>
--=20
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