Line 50 of the driver program sets the end of basic to be $1000 (minus one), which stops the BASIC code, and any normal vars, indexed vars, and strings from encroaching into the music routine (which lives at $1000). When tokenized (made C64-native), the BASIC program is 317 bytes long and lives at $0801. Note: If you plan to script the creation of these kinds of BASIC programs, you can use the provided gen_prg.py module to created C64-native PRG files.
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