ECS 661FX-M motherboard, revision 1.0, in a 660 KB RAR archive. The 661FX name matches SiS 661FX chipset boards from the Pentium 4 era. The file name does not say what documents are inside, so unpack it and check for a schematic or firmware dump. These help with tracing power rails on older desktop boards or rewriting a corrupted BIOS chip with a programmer. Save the original chip contents before flashing, and confirm the board revision and model on the PCB match the archive.
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 @pepeelectronica. Enginerys does not host this file.
All sources (5)
The same file was posted more than once. If one link is dead, try the next.
| Channel | Posted | |
|---|---|---|
| @pepeelectronica | 20 Apr 2022 | Open file on RM Schematics |
| @pepeelectronica | 21 Apr 2022 | Open file on RM Schematics |
| @cyberlanelectonik | 15 Jul 2026 | Open file on RM Schematics |
| @schematics_bios | 23 Jul 2026 | Open file on RM Schematics |
| @schematics_bios | 23 Jul 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.