How does assembler start programs from given memory address?

[sacrpio]

ASSEMBLER Related

Dear Friends,
How microcontroller knows that program has to start execution from a particular memory address, if we r not using ORG directive.

When we talk about cross compiler then STARTUP code takes care. If we talk in terms of assembler the how it happens.

Thanks..

 

[IanP]

Re: ASSEMBLER Related

If you don't use ORG command assembler will auutomatically start your code from address 0000h ..

 

[glenjoy]

ASSEMBLER Related

After you turned ON your microcontroller or after a reset, the program counter is set to address 0x0000h so the program always starts at 0x0000h, if there is a goto command at 0x0000h, the offset address of the said goto command address is put into the program counter so the execution moevs to the targeted address.