ATmega8 interrupt vectors

The 19 vectors at the start of flash, one word each (an RJMP). A lower number has the higher priority; vector 0 is reset. In avr-gcc a handler is ISR(NAME_vect).

Vector	Program address	Name	Handler	Source
0	`0x0000`	RESET	reset: `main()` after start-up	External Pin, Power-on Reset, Brown-out Reset and Watchdog Reset
1	`0x0001`	INT0	`INT0_vect`	External Interrupt Request 0
2	`0x0002`	INT1	`INT1_vect`	External Interrupt Request 1
3	`0x0003`	TIMER2_COMP	`TIMER2_COMP_vect`	Timer/Counter2 Compare Match
4	`0x0004`	TIMER2_OVF	`TIMER2_OVF_vect`	Timer/Counter2 Overflow
5	`0x0005`	TIMER1_CAPT	`TIMER1_CAPT_vect`	Timer/Counter1 Capture Event
6	`0x0006`	TIMER1_COMPA	`TIMER1_COMPA_vect`	Timer/Counter1 Compare Match A
7	`0x0007`	TIMER1_COMPB	`TIMER1_COMPB_vect`	Timer/Counter1 Compare Match B
8	`0x0008`	TIMER1_OVF	`TIMER1_OVF_vect`	Timer/Counter1 Overflow
9	`0x0009`	TIMER0_OVF	`TIMER0_OVF_vect`	Timer/Counter0 Overflow
10	`0x000A`	SPI_STC	`SPI_STC_vect`	Serial Transfer Complete
11	`0x000B`	USART_RXC	`USART_RXC_vect`	USART, Rx Complete
12	`0x000C`	USART_UDRE	`USART_UDRE_vect`	USART Data Register Empty
13	`0x000D`	USART_TXC	`USART_TXC_vect`	USART, Tx Complete
14	`0x000E`	ADC	`ADC_vect`	ADC Conversion Complete
15	`0x000F`	EE_RDY	`EE_RDY_vect`	EEPROM Ready
16	`0x0010`	ANA_COMP	`ANA_COMP_vect`	Analog Comparator
17	`0x0011`	TWI	`TWI_vect`	2-wire Serial Interface
18	`0x0012`	SPM_RDY	`SPM_RDY_vect`	Store Program Memory Ready