There's another project that's an interesting read at https://www.homebrew8088.com/ https://www.homebrew8088.com/. It uses almost all commodity 74xx parts, exc

There's another project that's an interesting read at https://www.homebrew8088.com/ https://www.homebrew8088.com/. It uses almost all commodity 74xx parts, except for a 486-era keyboard controller. If you use the NEC V40, a 186-style semi-integrated CPU, you don't even need a seperate interrupt controller or timer component. Yet, it will run an off-the-shelf XT BIOS (or this BIOS) as long as you run about 10 instructions to configure the V40's onboard peripherals to live at the right ports. You can add a DMA controller, but you don't need it unless you want a floppy drive or Sound Blaster.