Help the PSP 3D community grow!
Vote for us below:
| | Homebrew/Hacking - Discuss the latest available homebrew applications and games. |
Welcome to PSP3D.com - Sony PlayStation Portable News, Homebrew, Hacks, Reviews, Videos, Mods, Forums!
You are currently viewing our website as a guest, which gives you limited access to reply and interact to discussions and other members. By joining our free community, you will be able to post topics in the forums, communicate privately with other members, vote in polls, and access many other special features.
Registration is fast, simple, and absolutely free so join our community today!
|
 | 
04-23-2006, 04:03 AM
|  | Junior Member | | | | | How flash0 read/write possibly works
Ok, if in theory the flash0 on the PSP works the same as a flash BIOS, then it is possible to easly reflash the BIOS without tricking anything.
In a flash BIOS, there is a pin on the BIOS chip that works the same as the tab on a VHS tabe. if there is no current going into the tab, the BIOS is read only. If there is the right voltage going to it, then you have full read/write access.
There is a controling chip that designates weather or not the current is going to this pin. Now, the only problem is that this entier function is entierly contolled by machine code. Without the proper machine code, you cannot tell the chip to send the voltage to the pin on the BIOS to make it accsessibale.
The good news is that, going along the routh that flash0 works somewhere along the same lines as a BIOS, you do not have to have inital flash access to send the macine code to the chip. Plus, once the chip is open, in theory, you should have full acess to it. |
04-23-2006, 04:09 AM
|  | Jesus is in the building
My Mood:  | | Join Date: Nov 2005 Location: Carle Place..yea its 1 sq mile but so what!!! Age: 18
Posts: 1,072
Points: 13.56 Donate | | | Wrong. The PSP has its own BIOS which loads the FW off the Flash0 Chip. The Flash0 Chip is more like a hard drive than anything else. |
04-23-2006, 04:16 AM
| | | Junior Member | | | | | I'm not saying the FW is stored in the BIOS, im saying that maybe the read/write works the same for the flash0 as the BIOS. |
04-23-2006, 04:52 AM
| | | | People have already found that you can write to the NAND. The problem is that you need to know WHAT to write, and WHERE to write it. It doesnt seem to be as easy as just reflashing the PSP.
There is a good discussion about this on a more technical forum already. I'dd suggest searching for keywords like PSP, NAND, FLASH etc if you are truly interested in this. |
04-23-2006, 05:00 AM
| | | Jesus is in the building
My Mood: | | Join Date: Nov 2005 Location: Carle Place..yea its 1 sq mile but so what!!! Age: 18
Posts: 1,072
Points: 13.56 Donate | | | The last time someone tried to make a NAND Flasher, It was hell for most PSP Sites since a shitload of noobs on here said it worked but realy it just bricked. |
04-23-2006, 06:34 AM
| | | | I think you're totally wrong cause the FW area, flash0 and flash1 are all on the same chip so this chip is always writable by the kernel and the wrtie pin is enabled, the problem is that the system call to write on flash0 or to the FW is not accessible in user mode. |
04-23-2006, 08:06 AM
| | | | I was only talking about what people were doing when they connect flash programmers to the PSP mainboard. | |
Currently Active Users Viewing This Thread: 1 (0 members and 1 guests) | | | | Thread Tools | | | | Display Modes |  Linear Mode | 
Posting Rules
| You may not post new threads You may not post replies You may not post attachments You may not edit your posts
HTML code is Off
Points Per Thread View: 0.00 Points Per Thread: 1.00 Points Per Reply: 0.10 | | | | |
