Reminds me of the circuit in the Apple II red book manual https://archive.org/details/apple2_manual_a2rb/page/n115/mode/2up https://archive.org/details/apple2_

Reminds me of the circuit in the Apple II red book manual https://archive.org/details/apple2_manual_a2rb/page/n115/mode/2up https://archive.org/details/apple2_manual_a2rb/page/n115/mod... Which does just that.