>I have just received a project which originally used the 16F877A. 
>The bulk of the code is in assembler with the user interface written 
>in PBPro. The client wants to add extra features and functions to 
>the existing code base. In doing so I will exceeded the memory 
>capacity of the 877A. I am looking at the 18F4520 as a replacement. 
>The portions written in PBPro are easy to migrate but about 75% of 
>the code is in assembler (although well documented). Aside from 
>jumping in head first and going blind into the project are there any 
>issues or pointers that would make life a whole lot simpler that I 
>should look at before I proceed.
>
>Thanks all.
>
>Antonio Benci.

Nino,

Read the migration document (AN716) I sent you in a PM. I think it 
covers most issues.

Let me know if you get stuck on anything in particular. For a while 
the WARP-13 firmware was written to compile for either a 16F or 18F 
so I guess I should be able to help.

Regards,

Jim


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