Changes

The Chihiro arcade system was produced by Sega in 2003. It consists of an Xbox motherboard (with double the RAM as with devkits) with additional boards for handling arcade I/O (Sega JVS standard). As the inner workings of the Xbox are better understood, Chihiro emulation support and accuracy will improve. [https://github.com/xemu-project/xemu/issues/1442 Feature Request: Chihiro Emulation for xemu].