When you opened the CUE file, the emulator used it to reference the BIN file of the same name in the same folder. Think of the CUE as a reference guide, or a map, for the BIN file.
When you opened the CUE file, the emulator used it to reference the BIN file of the same name in the same folder. Think of the CUE as a reference guide, or a map, for the BIN file.