He turned a corner. A door slid open.
The ROM must be the unmodified USA release. The correct ROM generally has a [! ] (no-intro) designation. baseromusz64+download+link
If your ROM is a .v64 (byte-swapped) or .n64 (little-endian), you must convert it to .z64 using a web swapper. He turned a corner
The baserom.us.z64 is a specific file format of the North American (USA) release of Super Mario 64. baseromusz64+download+link