...yes! it erases the chip. Thanks
I really don't want to upload our application using the Bootloader, at least for poduction. We run at 9600 baud and our app is huge!
Here is what I found works for us to program the app and bootloader using an ISP (AVRISP MKII) programmer:
Program the Bootloader onto the chip using BASCOM.
Compile your application in Bascom but to NOT program it.
Open AVR Studio and go to the Program tab.
In the FLASH section browse to the .hex file (that bascom created during the compile).
Uncheck "Erase device before flash programming"
Click the Program button.
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