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how to run the bootloader example

Hi All,

I am new to microcontroller developement.I want to make a simple bootloader for P87C51 RD+. I have downloaded the bootloader example from keil site but i dont know how to compile and run it using keil IDE. When i try to build the project with all c file namely boot.c,boot.h,ext.c and jumptab.c, the compiler gives the error for two main method in the project. If I have to compile these files separately then please let me know in detail.
I want to build two types of bootloaders
one an on-chip and other an off-chip.
any help will be highly appreciated.

Thanks,
saqib

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