Pet peeve: the CMOS chip (Complimentary Metal-Oxide Semiconductor) is the memory chip that uses battery backup to store configuration data and is soldered to the motherboard. You need to replace the BIOS chip.

I found a photo of your board, and used the image to track down the original BIOS chip: https://www.digchip.com/datasheets/parts/data … 000PPC-12C4.php
They also list a 256K chip that ought to be compatible, but check the data sheets to be sure. https://www.digchip.com/datasheets/parts/data … /MX28F2100B.php

In my experience the BIOS chips are pretty interchangeable, so if you have a dead donor that has a 256K chip, it ought to work, but make sure the notches on the chip and the socket line up!

This is the flash BIOS chip that my Epox MVP3G-M has, and it's cheap and readily available. Data sheet is also there. https://www.digikey.com/en/products/detail/mi … -4C-PHE/2297831

Repo Man11 wrote on 2021-10-08, 02:14:

Pet peeve: the CMOS chip (Complimentary Metal-Oxide Semiconductor) is the memory chip that uses battery backup to store configuration data and is soldered to the motherboard. You need to replace the BIOS chip.

Fixed. 😀

Thanks for pointing this out.

Looking at the jumper manual I found, there's nothing about needing to change anything for a different BIOS chip. AFAIK it's plug and play. Make sure you have a chip extractor (it's hard to not bend the pins when pulling the chip with one, never mind without) and reinsert the chip gently with some dental floss under it so you can easily remove it once you're at the A: prompt.
http://www.win3x.org/uh19/motherboards/2414