In fact, I see it as being more compatible than using rom0:EELOADCNF because EELOADCNF is a board-specific file and not all PlayStation 2 console variants have it.

Hermes shared the source code, and he mentions in there that: There is second protection when loading the IMG image.

I suppose that was referring to the IOPRxx.img And since this is the second protection(which he says can be avoided thanks to mrbrown ELF loader), then the first protection should be the hardware protection(which is defeated by sensor modding).

He was not a native English speaker, and his explanation is not one of the best.

He say that firstly SYSTEM.CNF should be accessed by fioOpen, but I do not see the usage of this.

Why is this a must Furthermore, the IOP is reseated by rom0:UDNL cdrom0SYSTEM.CNF.

What is the usage of this What does UDNL find in SYSTEM.CNF Is it not used in resetting the IOP with an image And yet, as simple as it may seem, it looks a bit complicated to me.

The iopmod, which is loaded as a module, is a simmple variation of PSDEV hello IOP filysystem source code.

Works in a vaery similar way to CogSwap, but is more advanced.

First of all it must be admitted that Hermes got the idea from SM.

He probably studied some old version of it, and with the release of the source code no one seemed to mess around with it.

First of all, there seems not to be a rom0:UDNL cdrom0SYSTEM.CNF.

Instead, it either does the reset by EELOAD, or does a simple reset like this, which I do not know if it is correct: SifIopReset(0, 0); furthermore, it does a check of the reg 4,via SifGetReg, and checks for a value, if it is the same, then it continue.

I have very basic skills, however I think I have manged to correctly reverse a part of it(mostly by guessing).

So this is more advance, and needs to be studied, hope I can reach something here.

SM also used its own filesystem, cant remember the exact name, but the technique i the same as CogSwaper.

So SM was the original author if this technique It was released earlier than CogSwap.

And now the surprising part, if SP193 is reading this, he knows perfectly well, what I am saying.

People manged to use a PS2 Cd disk as a swap disk, for launching PSX games.

Not only that, but you can not launch a PSX EXE as you do with a PS2 ELF.

After it is set in PSx mode, rom0:LOGO is launched, and it does severel cheks, and I really doubt that it would not detect the swap.

This was verified, in a psx-scen thread, and someone else suggested this too.

If you add my crazt theiry on how the Ps2 is switched into PSX mode, then the backup would surely been detected, so I find it quite strange.

Why does it not work on V9 and down When CogSwap works Moslt likely this was a quick job done, and if you read my post a psx-scene, and see vegitos statement, it is all clear.

I am planning on making a swapping app, at least with a better GUI, ato test some ideas, but would like to know more.

Cheers.

It must be a valid IOPRP image, otherwise the IOP reset would fail and the IOP kernel would panic.

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