I had forgotten about those! I had a phreaking program[1] with those on the C-64. They called the DTMF utility 'Silver Box.' Turns out: https://en.wikipedia.or

I had forgotten about those! I had a phreaking program[1] with those on the C-64. They called the DTMF utility 'Silver Box.' Turns out: https://en.wikipedia.org/wiki/Silver_box https://en.wikipedia.org/wiki/Silver_box [1] It was this one: https://commodore.software/images/jdownloads/screenshots/telephone%20phreak%20utility.jpg https://commodore.software/images/jdownloads/screenshots/tel...