Sony play station 2 Hardware compatibility

OEM Sony play station 2 8 MB Memory Card
The PS2 hardware can read both CDs and DVDs. It is backward compatible with Sony play station 2 games and allows for DVD video playback. The ability to play DVD movies was an added incentive for consumers to be able to justify purchasing the PS2 (the MSRP was US$300 in October 2000).
The Sony play station 2 also supports PlayStation memory cards (for PlayStation game saves only) and controllers as well. There is also support for the internal Sony play station 2 HDD which is placed in the expansion bay at the rear of the console (model SCPH-5000x only).
The PS2's DualShock 2 controller is essentially an upgraded PlayStation DualShock; analog face, shoulder and D-pad buttons replaced the digital buttons of the original. All of the input buttons include the D-pad, the right buttons (X, Circle, Triangle, Square), the back buttons (R1, R2, L1, L2), and the middle buttons (Start, Select, Analog). This design has been carried on to Sony's PlayStation 3 (Sony play station 3), which is known as the SIXAXIS controller. The DualShock 2 controller has force feedback, which is commonly called the "vibration" function. It is usually used to tell the user when they have been "attacked" in a game. It is also commonly used in combination with an on-screen red mark, shake, blur, etc., to tell the player of an attack in any direction (commonly used in shooting games).
When it was released, the Sony play station 2 had many advanced features that were not present in other contemporary video game consoles, including DVD-playback functionality, USB support, and IEEE 1394 expansion ports. It was not until late 2001 that the Microsoft Xbox became the second console to include USB support (USB 1.1), with a proprietary Microsoft Xbox-shaped socket) and DVD playback capabilities.
Compatibility with USB devices is dependent on the software supporting said USB device. For example, the Sony play station 2 BIOS will not boot an ISO image from a USB flash drive or operate a USB printer, as the machine's operating system does not include this functionality. By contrast, Gran Turismo 4 is programmed to save screenshots to a USB mass storage device and print images to certain USB printers