Hello, I have a new Bigtower system here with a 486-VIP-IO board. Previously, there was a Intel DX2/66 CPU installed and I want to upgrade this to a Am486 DX4-100. I'm using the manual from this link: https://stason.org/TULARC/pc/motherboards/F/FIRST-INTERNATIONAL-COMPUTER-INC-486-486-VIP-IO.html …