Hi,

I dev BIOS from scratch (into 12h, based on coreboot/seabios/iPXE/memtest86+) for mb-8433UUD.
My main problems are:

• Lack for PCI diag and info
• NO USB diag/info/support, I need boot on USB and use USB keyboard
• memtest86+ directly into the BIOS
• speedsys DOS like directly into the BIOS
• iPXE directly into the BIOS to have diskless boot, include without network card ROM chip
• dump for chipset and other key info
• hurge fuzzing/test case base to have stable BIOS (EG try null size HDD, negative size, buggy device, 1TB HDD, ...)
• Fix 86Box for accruate emulation to dev mostly with the emulator
• Fix for coreboot/SeaBIOS on real 486

https://github.com/alphaonex86/mb-8433UUD-A-BIOS
I have PCI USB card, PCI ethernet card, PCI VGA card, 32MB RAM with 6.18 LTS Linux kernel, real HDD, MS-DOS 6.22 part to play with game.
I plan to replace to SSD, fanless power supply, and maybe dev my own CPU (FPGA based)...