I came across this site, which is from the author of the winning IOCCC entry, 8086tiny!

It’s ballooned from just under 4kb to 28kb, but still incredibly tiny!

For anyone interested it’s features:

• Highly accurate, complete 8086 CPU emulation (including undocumented features and behavior)
• Support for all standard PC peripherals: keyboard, 3.5″ floppy drive, hard drive, video (Hercules/CGA graphics and text mode, including direct video memory access), real-time clock, timers, PC speaker
• Disk images are compatible with standard Windows/Mac/UNIX mount tools for simple interoperability
• Complete source code provided (including custom BIOS)

It’s worth checking out for some old time PC/XT nostalgia!