[lenovo3000]

Yes ,i found MSID

images

but can't change.
Change is possible but not permanent.
As if the controller back to save to NAND.
You might think about making a controller that replaces the value (MSID).
However, I need to know the sequence of reading MSID (BS , DATA1,SDIO/DATA0,DATA2,DATA3, and SCLK).
If the sequence is simple to replace it, you can use AVR Atmega8.
Something like ModBo760