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Determining a Modchip –
Like many others, I bought a used PS2 and the owner does not know what chip is installed. I'm not to interested in learning exactly what chip it is as much as getting it to switch modes. Right now it can play PS2 Games and backups but not PS1 games and I have no idea how to make it do this. I understand that some chips can automatically detect what type of disk is in the drive but this one clearly cant....I guess I'm looking for anyway to digitally access the chip (like holding down certain buttons on the controller) or anything like that. any help is appreciated. Thanks!