PSX DESR-7000 Dual boot XMB and HDD OSD

[vitas155]

I found this video on youtube this man somehow managed to run on the PSX HDD OSD while he can still run the native XMB menu, who knows how he did it? Will it work only with the PSX HDD, or for example with the official PS2 HDD, or in general with any hard drive?

 

[krHACKen (aka kHn)]

who knows how he did it?

By inserting an audio CD.

Will it work only with the PSX HDD, or for example with the official PS2 HDD, or in general with any hard drive?

With genuine PS2 and PSX HDDs.

 

[vitas155]

can this method of loading be used by those who do not load the XMB menu? can it be restored in this way?

 

[vitas155]

small news, now you can run HDD OSD on any PSX model, this procedure is possible even if your XMB menu does not load, you can start HDD OSD both in a regular application from XMB and using FMCB, including automatic loading when you turn on the console, details will be a little later

screenshot from my console

Now it looks like using HDD OSD we can translate the XMB menu into any language and switch between them using HDD OSD, experiments have shown that XMB switches to the language that is selected in the HDD OSD settings, but the XMB translation text is taken from the files in its firmware where the translation is in the form of jp.txt en.txt files, etc. editing or creating from scratch these files and disguising them as languages available in the HDD OSD, we can translate into any language and switch between 5 languages (it seems like so much is available in the HDD OSD) soon I will try to make a trial translation into Russian and possibly others Gia languages

 

[Stayhye]

Is there any information on how this is done?

 

[krHACKen (aka kHn)]

Is there any information on how this is done?

The loader gets the disc type. If the inserted disc is an audio CD, it tries to load an ELF/KELF from supported devices.
In the above video, it loads

hdd0:__system:pfs:/osd100/hosdsys.elf

with params

hdd0:__system:pfs:/osd100/hosdsys.elf

and

BootCdPlayer

If the files cannot be found, it goes to the XMB.
The HDDOSD resource files were copied to the HDD (osd100 folder in the system partition) as well.

Some files you may want to toy with.
osd100/hosdsys.elf is the original HDDOSD ELF, re-signed to decrypt on both the PS2 and the PSX.
MBR.ELF is the original MBR ELF in its decrypted form. Could be, for example, run from FMCB or signed then run from the XMB.
HDDOSD.ELF is the HDDOSD ELF, with hardcoded params and a patch so it runs with the US languages set, VMODE and button mapping when executed in a Japanese system. Running it in a PSX2 will glitch the XMB, since the system software v2.xx partly handles language variables according to the non-volatile memory language setting. At this point it's better to use this shit in a PSX1 lol.

 

[AKuHAK]

BTW Does FreeHDBoot graphical menu work in such setup?

 

[krHACKen (aka kHn)]

I think so. If you run its decrypted MBR XLF. For running the US patched one, you'll have to sign it and replace hosdsys.elf.

 

[Mizzy]

Really interesting, just started messing around with my PSX's.