Windows-compatible BIOS for the Toshiba Chromebook CB30-B, made for Quanta board DA0BUHMB6E0 at revision E, supplied as a 1.40 MB RAR archive. The Windows label indicates firmware that replaces the stock Chrome OS image so another operating system can boot. Quanta uses the DA0 numbering pattern, with the revision letter at the end of the code. Write it to the SPI flash with a programmer, but first read and save the original chip, since that dump holds the unique Chromebook firmware and serial data.
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.
All sources (8)
The same file was posted more than once. If one link is dead, try the next.
| Channel | Posted | |
|---|---|---|
| @biosarchive | 30 Nov 2020 | Open file on RM Schematics |
| @laptexlaptopbios | 8 Dec 2020 | Open file on RM Schematics |
| @pepeelectronica | 21 Apr 2022 | Open file on RM Schematics |
| @pepeelectronica | 27 Apr 2022 | Open file on RM Schematics |
| @skclappybios | 10 Apr 2024 | Open file on RM Schematics |
| @schematics_bios | 24 Jul 2026 | Open file on RM Schematics |
| @schematics_bios | 27 Jul 2026 | Open file on RM Schematics |
| @schematics_bios | 3 Aug 2026 | Open file on RM Schematics |
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 →