Version 1.1 fixed a specific security vulnerability found in the 1.0 boot sequence (the "Visor" exploit), but for most emulation purposes, 1.0 is the standard.
In the emulation and console preservation community, this hash is the "golden master." It corresponds to the ROM dump taken directly from a pristine, unmodified original Xbox Revision 1.0 motherboard. md5 %28mcpx 1.0.bin%29 = d49c52a4102f6df7bcf8d0617ac475ed
If you want, I can:
If you have a file named mcpx 1.0.bin and run the following command on Linux/macOS: Version 1