Thanks for posting this! I’m particularly excited about the use of the opamp as a transimpedance amplifier, converting a current from a photodiode to a voltage, then being able to feed that signal straight into the ADC. Depending on the performance, this could simplify my design work significantly.
I found some basic documentation on that here - https://www.ti.com/lit/an/slaae81/slaae81.pdf?ts=1689294975621
That brought back a lot of memories. I remember my mom being addicted to the game for a while. MS-DOS days!