Hi, I know that similar questions have been asked a few times but due to my lack of knowledge, I need a bit more information...

Basically, I just want my program to be able to save preferences changes that users make when using the program on the chip. I figured that using IAP to save a few integers would make it possible to recall those integers if there was a power cycle.

I have had a look at Jan Waclawek's document on this subject (http://www.efton.sk/t0t1/p89v51rd2%20iap.pdf) that has some sample assembly code. My problem is that while I am happy with writing C code into the Keil uVision 3 software, compiling, and flashing it on to the chip, I am quite lost when it comes to integrating assembly.

My questions are:
1. do I put that code in an .a51 file that I then just add to my project?
2. does that code need to be modified at all for Keil uVision for it to work?
3. How do I declare/call the functions that are in the assembly code from my C code?
4. How do I know which areas (memory addresses) of the flash are available to be written to?

Many thanks to anyone who can assist me.