AVR-Chat

> I am trying to implement an ATMega8 bootloader. If anybody has 
> happened to got the experiences before, pls share with me. 

Have a look at: http://www.microsyl.com/megaload/megaload.html

There is an AVR GCC port of this as well in the User Projects of the
AVRFreaks Academy: http://www.avrfreaks.net/

An AVR GCC implementation of the Stk500 protocol as a boot loader:
http://www.avr1.org/stk500boot/stk500boot.html


Also there is an Atmel app note: 
http://www.atmel.com/dyn/resources/prod_documents/doc1644.pdf
http://www.atmel.com/dyn/resources/prod_documents/AVR109.zip

Merry Christmas

Alex Shepherd