At 01:32 PM 5/2/96 +0000, you wrote:

>
>I'm thinking about a thing like this and putting some calibration data
>(ADC) into OTPROM, like measure it first and then program the chip with a
>patched file. Or better, burn the program, do a calibration run (part of
>the program), get some reference values (from the PIC), send these back to
>the programmer, and then put these reference values in the program memory
>at some unused location. Does anybody have experience with a setup like
>this? I.e. is it possible to program just some locations after the "main"
>program has already been burned?
>
>
>Gerhard
>
Gerhard,

The above can be done on some devices  even after code protection. In fact
that is the idea way to do it if you are using a part that will allow
reprogramming of protected areas. These parts are: 16C5x, 16C61, 16C71

Other (more) useful parts are the  16C710, 16C711, 12c50x as these allow
reprogramming of locations 0 to 40h without scrambling.

If you are still interested, and I see you are going cold on the idea from
other postings, you may want to look at my programmer software as it will
allow you to put variables into a .SER file and burn them into a code
protected part. Really useful I thought but no one seems to need to do that
sort of thing. :~(

If need be I can modify the software a little to your needs.

Be in touch if I can help further.


Jim