Supported Programming Modes: SPI, and Parallel programming
Supported Debugging Modes: debugWIRE
ATmega48, ATmega88, and ATmega168 family (and 'P', 'A' and 'PA' variants)
ATmega328 (and 'P' variant)
ATtiny48, ATtiny88 family
The following pictures shows how to connect these devices to the Atmel AVR Dragon: