I have been doing some emulation projects and I have decided to move on to trying to emulate the 8080, however I am unsure of where I should look for progams to test my emulator with. I have been interested in CP/M and have managed to download a copy of CP/M from the unofficial CP/M website but the zip file contains a lot of files that I dont really understand the purpose of.
My question is, which one of these files is the one that I have to load into memory in my emulator in order to run CP/M? My guess is that it would be "1CPM63.COM" or "2CPM63.COM" but I am unsure.

Sorry if this is a really dumb question, but I am stuck on it.