Building a RIDICULOUSLY Overpowered DOS PC - Retro Rocket

Wanna run Kings Quest and Crysis on the same PC? No problem! // Your trustable pcb prototype partner : https://www.pcbway.com/ SD Card holder : https://www.amazon.co.uk/dp/B07TC2MF6R Windows 98 auto-patcher : https://retrosystemsrevival.blogspot.com/2018/01/auto-patcher-for-windows-98se-december.html Hacked NVIDIA drivers : https://toogam.com/software/archive/drivers/videodrv/mswinvid/nvidia/unoffici/nv8269.php FastDOOM : https://github.com/viti95/FastDoom I've tried the following things to get ISA soundcards working on Windows 98 : * Updating motherboard BIOS (it was already latest, same error). (EDIT : tried some older BIOSes, same result) * Disabling all unused hardware/ports/etc in BIOS and removing all hardware except graphics card (same error) * Trying a few different AGP/PCI graphics cards in case it's a conflict there (same error) * Enabling/Disabling ACPI, reinstalling windows each time (same error) * Enabling/Disabling "PNP OS Installed" in BIOS with ACPI disabled, reinstalling windows each time (same error) * Trying various versions of the Via 4-in-1 chipset drivers (same error) * Trying several versions of soundcard drivers (same error) * Manually adding the soundcard in Add New Hardware so the "resources" tab appears - on next reboot I get two soundcards in device manager (both not working) * Trying on Win95 instead (similar error, forget exact text) * Trying DOS and even Windows XP instead of 9x on same motherboard (works perfectly) * Testing both soundcards in other PCs with Win9x (works perfectly)