debugger

Nice to meet you guys, and thanks for your responses Now i understand (more or less) how it's possible to boot for a game, so i can continue with my work; DanBoris thanks, i'm very very very interested in getting some more info about this register, i'll be very grateful if you can find anything EricBall, Happy_Dude, thanks to you too, now i'm a bit less confused... Booting from TIA/MARIA registers seemed a bit weird to me BTW: Anyone knows if any 2600/7800 game made use of any of the undocumented 6502 opcodes? Um... "SP is hardwired to page 1 ($0100-$01FF)" ? There aren't (again) TIA/MARIA registers in this address?

After spending ages searching google, i'm still unable to find some information i need to do a project. In particular, i need to know small things about Atari 7800 (and 2600) like what values are into PC and SP when the console is powered up, as i think it's not possible to have a 0 value because in address 0 there are the TIA/Maria registers... Can anyone help, please? Another thing that confuses me is the address where bios rom and the cartridge are located... Bios ROM seems to be overlapping some of the cartridge space, so this means there's something like a page swapping feature in any place, but where and how it works? Third and last one What format do have the cartridges? I mean, how data is stored? The console executes the cartridge game from the first byte or there are initial bytes with some obscure meaning? A big thankyou in advance guys Debugger