I want to contribute to the sdcc project. I have downloaded the sdcc source files by svn. There are so many branches and trunks in the downloaded folder that I do not know where to add my changes and how to submit them. I am working on the nRF24LU microcontroller (x51 based) family and would like to contribute an SDK that I am developing right now. Please guide me. Also there are so many branches. To which branch should I contribute my code to? SHould I contribute to the branch or to the trunk. 

This is my first opensource project, so please answer my irritating newbie questions in detail.

Thanx in advance.

Regards,
Koustubh Sinkar
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कौस्तुभ सिनकर