Hi Imre,

   Thanks for your response. Turns out it must have ben the LVP bit being
set to on during programming.
Your point concerning 8 vs. 10 A/D conversion, is in fact a valid
consideration for my application and
I am aware of this. I now have everything working.

      --best regards,
            Dr. Bill Showkowy


At 11:15 AM 2/22/00 +0100, you wrote:
>Hi,
>
>you could have a problem using A/D as 16C73A has 8 bit resolution, and
>16F873 has 10 bit. If you use A/D, it can be a (not very big) concern.
>
>Regards,
>Imre
>
>
>On Mon, 21 Feb 2000, Bill wrote:
>
>> Hi Everyone,
>>
>>
>>      I have attempted (unsuccessfully so far) to migraite some code I've
>> tested on a 20 MHZ 16C73A-JW to a 20 MHZ 16F873 flash pic. An engineer at
>> Microchip
>> told me that they are pin for pin compatible and are functionally very
>> similar, so it should be a no-brainer.  --Turns out it's requiring brains
>> after all (I am not surprised). I have a standard Hitachi 4 x 20 LCD which
>> does not seem to initialize and I get no characters displayed. However, an
>> interrupt routine which worked on the 16C73A seems to work ok, so it must
>> be a timing issue of sort. Does anyone out there know of any migration
>> issues when porting code written for a 16C73A to a 16F873?  I have checked
>> Microchip's web-site and cannot find any such migration document although
>> you would think one should exist. Any help would definitely be appreciated.
>>
>>
>>               --Bill
>>
>>
>