Behold the glorious retro controller face, then forget about it because you will flip the controller for the rest of the teardown.

Use the size #1 Philips to remove the 7 screws on the back of the controller.

Use the size #0 Philips to remove the smaller screws in the controller pak slot.

Remove the back plate. You can now see the:

Power Input

Game Pak Slot

Trigger Button Assemblies

Z Button Assembly

Joystick Module

Using a spudger or similar tool, carefully pry the Z button assembly from the joystick module.

Remove the 3 size #0 screws holding in the joystick module.

Remove the joystick cable from the main board.

Remove the joystick module.

Remove the main board and trigger assemblies.

Your controller is now fully disassembled!

Full IC Identification: