BIOS firmware archive labelled P21 PDC, packed as a RAR of 458 KB. The name gives no brand, though the same label appears elsewhere in HCL laptop collections; PDC most likely marks a Pentium Dual-Core variant, but treat that as unconfirmed. Extract the archive with WinRAR or 7-Zip and check the image size against the capacity of the SPI or LPC flash chip on the board. Read and save the original chip contents with a programmer before writing anything, and confirm the model sticker and board markings match.
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 @biosarchive. Enginerys does not host this file.
How to open a .rar file
Compressed archive — the usual wrapper for a schematic + boardview pair or a BIOS + EC set.
Back up your own chip before writing any dump, and match the full board number and revision. Flashing guide →