PS1 Dualshock Analoge Controller

The PS1 controller was a wired gamepad featuring a directional pad (D-pad), face buttons (triangle, circle, cross, square), shoulder buttons (L1, L2, R1, R2), and digital and optional analog control options, communicating with the console via a serial protocol. The original PlayStation controller was later succeeded by the Dual Analog Controller and then the DualShock, which introduced analog sticks and vibration feedback.  

PS1 Controller (SCPH-1010)

• Input:
  • Digital directional pad (D-pad)
  • Four face buttons (Triangle, Circle, Cross, Square)
  • Four shoulder buttons (L1, R1, L2, R2)
  • Start and Select buttons 
• Connectivity: PlayStation controller port, using a serial protocol. 
• Design: Lightweight with a simple design for a stable grip. 
• Successor: The Dual Analog Controller was the first controller with analog sticks and was a direct successor to the original PlayStation controller, according to Wikipedia. 

Dual Analog Controller 

• Input:

  • 2 x analog sticks (8-bit precision)
  • Pressure-sensitive digital buttons, including the D-pad, face buttons, and L1/R1, L2/R2 shoulder buttons.
  • Select, Start, "Analog", L3, and R3 digital buttons.

• Design: 

  Added two analog sticks to the previous digital-only model, says Wikipedia.

DualShock

• Input: Identical to the Dual Analog Controller. 
• Design: Introduced a vibration function for compatible games, according to CeX. 
• Successor: The DualShock became the standard controller and was included with later PS1 models and became the default controller for the PlayStation. 

Key Differences Between Models

• The earliest PS1 controller was a digital-only device. 
• The Dual Analog Controller introduced analog sticks for 3D environments. 
• The DualShock controller added force feedback (vibration) to the Dual Analog controller's features.