I did. Do you know the software license of the original code?

edit: P.S. working deobfuscation, i.e. you can build the executable. Including some minor corrections to the orgininal (e.g. 1MB of RAM allocation instead 2MB, BIOS file size limited to 65536-256 bytes, etc.). It a nice code, minimalistic, e.g. the "rep" prefixed instructions are actually repeated, not unrolled. Really optimized for code size. Even deobfuscated it takes 12-13KB and 22KB of executable (x86-64 Linux, stripped binary). Very cool.