forums.ps2dev.org

My thanks to TyRaNiD.

I installed the toolchain and began to learn homebrew several days ago. I've read the tutorials here and had some question. http://www.scriptscribbler.com/psp/ For small homebrew programs, these questions may be insignificant. But I always like to get the bottom level software mechanism cleared befo...

After confirming exit in the menu(home button associated), usually PSP takes several seconds to exit to the XMB system. During this period, the memory stick access lamp keeps flickering. What does the PSP do to access the memory stick? The homebrew code saves config data to ms? In most case the conf...

the logic behind it is that there's a bug in the path parsing somewhere. I could've found this if I tried to experiment more with the paths too :P (I bet it'll work with other characters too) if it is a bug in path parsing, I can't imagine how sony made such an obvious and stupid error(Just can't i...

the logic behind it is that there's a bug in the path parsing somewhere. I could've found this if I tried to experiment more with the paths too :P (I bet it'll work with other characters too) if it is a bug in path parsing, I can't imagine how sony made such an obvious and stupid error(Just can't i...

Its seems you really know what you are talking about right ? Try to do something smarter than a matrix computation per pixel. Floating point operation ? and why not a Cray computer to draw a line... I can do what you are talking about with 3 ADD, 2 SHIFT , 1 ARRAY INDEX access per pixel inside the ...

Snes9x on pc took several years to achieve the fruit today. While for psp, it has been only several months till now and we already have fully functional emulators. It is good. Considering the computation amount for graphic processing. 128 simultaneous spirits, each up to 64*64 size, that is 512k pix...

Snes is a great game console. It has many wonderful games.

333mhz still can not get full speed, I wonder if the emulator uses psp's graphic hardware.

I don't know much about code security, but I've read some basic mechanism somewhere. Pbp on ms 1 packs a sfo and a icon, no code but indicates the pbp as bootable. Pbp 2 has a unsigned elf faked itself as a pbp package. It seems likely(only likely, don't know if it is) the pbp's sfo on ms1 causes so...

If sony really uses 128bit AES on elf, and we really take full control of the 1.0 psp. We can give the 1.0 psp an unencrypted elf and tell the psp it is an encrypted file, let psp 'decrypt' the file and write the data to ms for us. So far, just feeding the PSP an encrypted prx to decrypt would be a...

If sony really uses 128bit AES on elf, and we really take full control of the 1.0 psp. We can give the 1.0 psp an unencrypted elf and tell the psp it is an encrypted file, let psp 'decrypt' the file and write the data to ms for us. Because encryption and decryption key is the same, 'decrypt' the ori...

Of course if you can get the key you can encrypt the file as well, but this is the point we are trying to make and I will only say it once ;) If, as is very very likely, there is hardware in the psp to do the encryption then it is also likely that the key is stored in hardware. Now a simplistic int...

edit: I've carefully read the above again. I think I know what you means. But I don't understand why symmetric/asymmetric makes no difference. As the text referenced, is the decryption key also the encryption key? original: I am not an expert on AES encrypt method. But I read some basic matters abou...

If really full control over 1.0 is performed, how psp loads and decrypts the 1.5 update pbp will be known, and then the following: 1.5 psp's elf loader. Maybe you are right, a loader could be written, which runs on 1.5 PSP's, but how do you start it? It must be itself an encrypted program and there...

Could this mean we can do homebrew on 1.5 soon? Doesn't seem that way to me. Looks more like it will soon be possible to have nearly full control over PSP at 1.0, which is currently hampered by lack of access to kernel mode. If really full control over 1.0 is performed, how psp loads and decrypts t...

Could this mean we can do homebrew on 1.5 soon?

"bootstrap area with equipment serial IDs in the flash chip" What is the equipment serial ID? Is it a hardware matter or a software matter? Can this area be read by electrical means? If there is really no code to perform decryption, maybe there is some hardware implemented decryption proto...

Wouldn't these modules be loaded in readable RAM in the userspace (as they are callable kernel calls)? No, they are loaded in kernel space and protected from read access by the MMU. Could this mean umd games and ms applications must base on the psp os kernel from the firmware and thus can't take fu...

If the psp is finding bootable data, the bootable data in the ms may not be files. It may be stored in some boot section, or even in some unknown area.

I know about the ms hardware, so it is only a guess.

My thanks to all enthusiastic people above. With the cool psp in hand, files transfering between psp and pc so convenient, but can't run any code on it, seems I am too eager to wait. I see 1.0's existence has greatly encouraged homebrew. Once 1.5 become no problem, there will be many good software f...

I've been here for some time. People here who care psp's hacking seems much less since the fact that bare elf can run on 1.0 was found. I ever wondered why sony did not disable bare exe in pbp package. Just disable unencrypted exe in the 1.0 firmware would mean nothing. Maybe sony left this hole jus...

I dont think most of you understand. If this works, then we will be able to downgrade to any official releases in the future. Any version except 1.0. Once we know how to encrypt a psp executable file, we can downgrade to 1.0. But once we know how to do it, downgrading to 1.0 will mean nothing.

Ironically making the PSP so secure and adaptable to threats could be the thing that kills it off... I'm not interested about warez in the slightest (I work in the games industry so that would be taking the food from my mouth :-) And no I'm not a tester and I'm not going to try and get a PSP SDK fo...

Maybe they will just allow to run unsigned ELF again... a security problem reversed... (if you run unsigned there's less chance of trying to break the encryption...) If the lock is released in the future, PSP will be an excellent homebrew device. I'll write a midi player that supports dls files for...

After take a fast look on the file list in the firmware , I have a question. If those library files already existed in the firmware , why game developer include thost files (such as libhttp.prx) again on the umd disk?? What a stupid way , especially when we know true that , reading the umd disk is ...

I guess the 8MB OS kernel(at least most of them, game related) is launched from the game disk other than the firmware. This makes things easy when the low efficiency 8MB huge OS kernel becomes a burden for developers someday. I think some misunderstanging about os kernel. if os kernel is load from ...

I guess the 8MB OS kernel(at least most of them, game related) is launched from the game disk other than the firmware.

This makes things easy when the low efficiency 8MB huge OS kernel becomes a burden for developers someday.

excellent work!

This brings great hope of full dev.

It works.

Thanks.

When converting MP4 files for the psp, the ffmpeg program uses '-title' option to write the title tag in the MP4 file, which is displayed by the psp when browsing the file. I noticed that to let the name correctly displayed, the given string must be Shift-JIS encoded(for my JP version psp). My probl...