Quote from: 429076 on June 20, 2017, 01:57:10 am
Hi everyone. I've tried this image and it works. Thanks for the image.
I've started with z800 rev 002 stock BIOS chip, not working with 56xx processors. Tried to flash it in place (without any soldering). And I've got interesting result - I am able to erase the chip, but can't write new image to it.
So the BIOS was spoiled and I proceeded with the long way. I've unsoldered the chip and tried to flash it separately, but it was still read only (or maybe I've had some issues with my programmer). I've had some new spare chips, and flashed the image to new one without any errors. And now motherboard boots with 56xx processors, and has new boot block.
Congratulations on a succesfull boot block upgrade.
it is also my understanding / experience that certain regions of the stock bios HP bios chips have write protect enabled at the bios chip level during the course of the original factory programming. Thus, even with an unlocked descriptor and the relevant jumpers on the board in place attempting to write to the stock HP bios chip usally throws up an error at c.a. 25-30% progress bricking the machine in he proces. For this reason replacing the bios chip is the only viable option I am aware off to change the bootblock.