An 8 MB BIOS image for a Compal LA-J081P laptop motherboard, saved as a raw .bin file. The word castm in the name is unclear and may be the uploader's note. LA-xxxxP is Compal's board-numbering pattern, and Compal builds boards for several laptop brands. The 8 MB size matches a 64 Mbit SPI flash chip, which is written with a programmer such as a CH341A. Read and save the original chip contents before flashing, and check that the chip capacity matches the image.
The button opens the matching file on RM Schematics, or a source page if it is not catalogued there yet. The original attachment is from @CLRINDORE. Enginerys does not host this file.
How to open a .bin file
A raw, byte-for-byte image of a flash chip: the main BIOS / UEFI, the embedded-controller (EC) firmware, or both.
Back up your own chip before writing any dump, and match the full board number and revision. Flashing guide →