Sorry I don?t know much about the startup procedure but maybe you try to play PAL Cartridges on a NTSC Device? NTSC Devices expect a valid key stored in a specific range of the cartridge that PAL Carts don?t have (PAL Devices don?t use this encryption because of export restrictions). _____ Von: atari7800-bounce@xxxxxxxxxxxxx [mailto:atari7800-bounce@xxxxxxxxxxxxx] Im Auftrag von Kroko Gesendet: Mittwoch, 10. August 2005 23:18 An: atari7800@xxxxxxxxxxxxx Betreff: [atari7800] Re: AW: 7800 cartridge detection Do you know, how the 7800 detects if a valid cartridge is plugged in ? ----- Original Message ----- From: Matthias <mailto:matthias@xxxxxxxxxxxx> Luedtke To: atari7800@xxxxxxxxxxxxx Sent: Wednesday, August 10, 2005 11:09 PM Subject: [atari7800] AW: 7800 cartridge detection If you have trouble with more than one cartridge than I guess your 7800 have a problem? _____ Von: atari7800-bounce@xxxxxxxxxxxxx [mailto:atari7800-bounce@xxxxxxxxxxxxx] Im Auftrag von Kroko Gesendet: Mittwoch, 10. August 2005 21:16 An: atari7800@xxxxxxxxxxxxx Betreff: [atari7800] 7800 cartridge detection Hi ! I am having trouble with a 7800. How does the 7800 detect that a cartridge is plugged into its cartridge port ? It starts up the built in Asteroids for some of the cartridges I have here, even if they are plugged in ... Is the 7800 faulty or the cartridges, or is this a common problem ? Armin