LA-C361P-20210510T205908Z-001-BIOS EC P56f XPS 15 9550

BIOSEC

8.7 MB · first posted 2021-05-11 in BIOS Archive

What the file name tells us

Brand	Dell
Model	Dell XPS 15 9550
Board	LA-C361P
ODM	Compal
Kind	BIOS, EC
Format	.zip
Archive size	8.7 MB
First posted	2021-05-11
Channel	BIOS Archive

Parsed automatically from the file name and caption. Always compare the board number with the one printed on your board.

What this kind of file is for

A BIOS dump is a full image of the board's SPI flash chip. It is written back with an SPI programmer when the original firmware is corrupted, after a chip replacement, or to recover from a failed update. Read and save the original chip first: serial number, DMI data and the Intel ME / AMD PSP state differ between boards.

EC (embedded controller) firmware runs the keyboard controller, power sequencing, battery charging and fans. Depending on the board it lives in a separate chip (ENE KB9012, ITE IT85xx, Nuvoton NPCE) or inside the main SPI image, so check which applies before flashing.

Tools to open these files

Format	What it is	Open with
.zip	ZIP archive	7-Zip, WinRAR or the built-in Windows extractor
.bin	BIOS image inside the archive (usually .bin)	a CH341A, XGecu T48 / TL866II Plus or RT809H programmer