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The sixth-generation hardware of the PlayStation 2 (PS2) video game console consists of various components. At the heart of the console's configuration is its central processing unit (CPU), a custom RISC processor known as the Emotion Engine which operates at 299 MHz. The CPU heavily relies on its integration with two vector units, known as VU0 and VU1, the Graphics Synthesizer, and a floating-point unit (FPU) in order to render 3D graphics. Other components, such as the system's DVD-ROM optical drive and DualShock 2 controller, provide the software and user control input. PlayStation 2 software is distributed on CD-ROM and DVD-ROM. In addition, the console can play audio CDs and DVD movies, and is backwardly compatible with original PlayStation (PS1) games. This backward compatibility is accomplished through the inclusion of the original PlayStation's CPU which also serves as the PS2's I/O processor.〔http://www.theguardian.com/technology/2013/dec/12/ps4-and-xbox-one-so-why-arent-they-backwards-compatible〕 The PS2 also supports limited functionality with PS1 memory cards and controllers. The PS2's DualShock 2 controller is an upgraded version of the PS1's DualShock with analog face, shoulder and D-pad buttons replacing the digital buttons of the original. Like its predecessor, the DualShock 2 controller features force feedback technology. The standard PlayStation 2 memory card has an 8 MB capacity and uses Sony's MagicGate encryption. This requirement prevented the production of memory cards by third parties who did not purchase a MagicGate license. Memory cards without encryption can be used to store PlayStation game saves, but PlayStation games would be unable to read from or write to the card – such a card could only be used as a backup. There are a variety of non-Sony manufactured memory cards available for the PlayStation 2, allowing for a larger memory capacity than the standard 8 MB. However their use is unsupported and compatibility is not guaranteed. These memory cards can have up to 128 MB storage space. The console also features USB and IEEE 1394 expansion ports. Compatibility with USB and IEEE 1394 devices is dependent on the software supporting the device. For example, the PS2 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'' and ''Tourist Trophy'' are programmed to save screenshots to a USB mass storage device and print images on certain USB printers. A PlayStation 2 HDD can be installed via the expansion bay in the back of the console, and was required to play certain games, notably the popular ''Final Fantasy XI''. This was available on only certain models (see Connectivity). Technical specifications〔http://users.ece.gatech.edu/lanterma/mpg/ece4893lec_ps2.pdf〕〔http://www.ps2fantasy.com/hardware/ps2/system.php〕〔http://www.angelfire.com/electronic2/mariotan/〕〔http://users.beagle.com.au/jmk222/d-ps.html〕〔http://www.docstoc.com/docs/73439402/Inside-PlayStation-2〕 ==Central processing unit== * CPU: MIPS R5900-based "Emotion Engine", clocked at 294.912 MHz (299 MHz on newer versions), with 128-bit SIMD capabilities〔John L. Hennessy and David A. Patterson. "Computer Architecture: A Quantitative Approach, Third Edition". ISBN 1-55860-724-2〕〔Keith Diefendorff. "Sony's Emotionally Charged Chip". Microprocessor Report, Volume 13, Number 5, April 19, 1999. Microdesign Resources.〕 10.5 million transistors * * CPU core: MIPS R5900-based, 64-bit, little endian (mipsel). * * * FPU (Floating Point Multiply Accumulator × 1, Floating Point Divider × 1) * * Vector Units: VU0 and VU1 (Floating Point Multiply Accumulator × 9, Floating Point Divider × 1), 32-bit, at 147.456 MHz. * * * VU0((COP2)PS1 GTE) typically used for polygon transformations optionally (under parallel or serial connection), physics and other gameplay based things * * * VU1(EFU) typically used for polygon transformations, lighting and other visual based calculations (Texture matrix able for 2 coordinates (UV/ST)〔(【引用サイトリンク】title=Tapping into the power of PS2 )〕) * * * * Parallel: Results of VU0/FPU sent as another display list via MFIFO (E.G. complex characters/vehicles/etc.) * * * * Serial: Results of VU0/FPU sent to VU1 (via 3 methods) and can act as an optional geometry pre-processor that does all base work to update the scene every frame (E.G. camera, perspective, boning and laws of movement such as animations or physics)〔(【引用サイトリンク】url=http://www.cs.nyu.edu/courses/spring02/V22.0480-002/projects/vu/emotion.doc )〕 * * Image Processing Unit (IPU): MPEG-2 Compressed Image Decoder * * Memory management unit, RDRAM controller and DMA controller: handle memory access within the system〔(【引用サイトリンク】 publisher=Free Software Foundation, Inc. )〕 * * Cache memory: Instruction Cache: 16 KB, Data Cache : 8 KB + 16 KB Scratchpad (ScrP) 抄文引用元・出典: フリー百科事典『 ウィキペディア（Wikipedia）』 ■ウィキペディアで「PlayStation 2 hardware」の詳細全文を読む スポンサード リンク
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