(UEFI) Dell XPS 15z L511z modded BIOS - and HOWTO

[kasar]

well, if the only viable way of getting that thing unlocked is directly program the flash unit by hardware programer, I think we can go for it.

as for me, I made some electronic projects before.

like turn a cheap RC car into a wireless comtroled robot with camera and more stuff, everything controlled from a wrt54gl router.

while I was flashing modded firmwares into it, it got bricked once.

so I had to build a JTAG cable, then I was able to flash and recover the router by conecting the JTAG cable to the parallel port of a computer and the other side to a custom made conector at the router.

I think I may be able to use the JTAG cable to get access to the motherboard, not sure if when I made the internal usb mods to my xps15 I saw some kind of dev internal port, so I manage the get the correct pinouts from that port, I may get all of this working.

this also have some advantages, like if we get a working hardware programer, then we can made a whole backup of the flash, and by having a whole backup of the flash, I supose there will be no posible way our laptop get bricked ever, because we will allways be able to restore our working backup ^^

we also would be able to unlock the descriptor by hex moding the backup by modifing the values timewalker pointed, and then flash it back ^^

some pics of the JTAG cable I made









also, if I manage to get the correct pinouts, I could put that small conector on the l502x ram expansion door, so when I have to flash anything from that, I woulnt have to take appart the whole laptop, just remove the door.

what do you think about this guys, would be a viable option?

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now some images from the net of the jtag cable ussage






I hope this will works :3

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well, there are also another solutions

this one for example

http://www.embeddedcomputers.net/products/FlashcatUSB/

you can see our SPI Flash device: "W25Q32BV" unit is supported