PIC16F877A to PIC16F887`

[Unhappy]

I know this is silly can anyone tell me how to use/convert *.hex file meant for PIC16F877A to program a PIC16F887. I do not have any source code files.
Thanking you all in anticipation
UnHappy

[tAhm1D]

This is rather difficult as 16F877A and 16F887 have some differences, which you would need to change in the code to make it compatible for 887. You could disassemble it (software are available) and modify it, but it would become quite messy.

[Ichan]

What i will do:

1. Find the difference between the two micros
2. Find where your new hardware meet 1
3. Disasembly the hex in mplab
4. Modify the disasemlby listing  related to 2
5. Rebuild the hex

It will not be easy.

-ichan

[gan_canny]

Attempting this without source code may become a fools errand. Even assuming it was coded to be as portable as possible the compiler is often charged with small micros to make the code compact and maximize the efficient use of the on chip firmware.This means the instruction level code becomes specific even if the higher level wasn't.
I'd try the dis-assembly route but then using the ASM code  I'd recode in c.