The Nintendo DS is a handheld video game console that was released on November 21, 2004. It is the console on which Under the Knife is played and will be the console for the future title Under the Knife 2, to be released on July 1, 2008.
- Mass: 275 grams (9.7 ounces).
- Physical dimensions: 148.7 x 84.7 x 28.9 mm (5.85 x 3.33 x 1.13 inches).
- Screens: Two separate 3-inch TFT LCD, resolution of 256 x 192 pixels, dimensions of 62 x 46 mm and 77 mm diagonal, and a dot pitch of 0.24 mm. The gap between the screens is approximately 21 mm, equivalent to about 92 "hidden" lines. The lowermost display of the Nintendo DS is overlaid with a resistive touchscreen, which registers pressure from one point on the screen at a time, averaging multiple points of contact if necessary.
- CPUs: Two ARM processors, an ARM946E-S main CPU and ARM7TDMI co-processor at clock speeds of 67 MHz and 33 MHz respectively.
- RAM: 4 MB of Mobile RAM
- Voltage: 1.65 volts required
- Storage: 256 kB of Serial Flash Memory
- Wireless: 802.11 + Nintendo Original Protocol
- Wi-Fi: Built-in 802.11 Wireless Network Connection (802.11b/g compatible with WEP encryption support only)
The system's 3D hardware performs transform and lighting, texture-coordinate transformation, texture mapping, alpha blending, anti-aliasing, cel shading, and z-buffering. However, it uses point (nearest neighbor) texture filtering, leading to some titles having a blocky appearance. The system is theoretically capable of rendering about 120,000 triangles per second at 60 frames per second, which is comparable to the Nintendo 64. Unlike most 3D hardware, it has a set limit on the number of triangles it can render as part of a single scene; the maximum amount is about 6144 vertices, or 2048 triangles per frame. The 3D hardware is designed to render to a single screen at a time, so rendering 3D to both screens is difficult and decreases performance significantly. The DS is generally more limited by its polygon budget than by its pixel fill rate. There are also 512 kilobytes of texture memory per screen, and the maximum texture size is 1024x1024 pixels.
The system has 656 kilobytes of video memory and two 2D engines (one per screen). These are similar to (but more powerful than) the Game Boy Advance's single 2D engine. However the cores are divided into the main core and sub core. Only the main core is capable of vertex 3D rendering.
The Nintendo DS has compatibility with Wi-Fi IEEE 802.11. The unit also supports a special wireless format created by Nintendo and secured using RSA security signing (used by the wireless drawing and chatting program PictoChat for the DS). Wi-Fi is used for accessing the Nintendo Wi-Fi Connection, where users can use the internet or compete with other users playing the same Wi-Fi compatible game.