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Originally Posted by TheAlmightyOS
I see. So no boot disks or anything. Just keep the memory card in the slot and turn on the console. That would work perfectly for what I want to do. Still don't understand the HOW though.
Maybe some homebrew developers could answer this one. What makes the PS2 read and then start a program located on the memory card?
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Sony themselves wanted this ability for some of their own stuff, and so they designed a way to do this sort of thing from the very first (a v1 PS2 can do it too). But it took this long for homebrewers to catch on to how this feature can be abused for our own purposes.
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Is it something that is hardwired into the system?
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Yes, it is hard-coded into the PS2 bios. And that goes for all known models.
(Though they might change it for the next model, if they make any more.)
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If so, for what purpose does it exist other then being taken advantage of for homebrew programs?
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The original purpose of Sony was to allow extension and improvement of the built-in firmware programs without replacing any hardware.
Known Sony uses of this method include the 'BB-Navi' internet software (Japan-only I believe), an improved Browser able to backup gamesaves to HDD (original Sony hdd only), and some DVD player upgrades. The installation of these 'signed' bootable files to MC was done by booting special upgrade discs produced by Sony.
You really should visit the FreeVAST forum like dangwoot suggested (with that link), as I'm sure you will find lots of interesting stuff there, including most of the history of FMCB development.
Best regards: dlanor