====== PSP Hardware Specifications ======


===== CPU =====
  * Allegrex CPU
    * MIPS r4000 32-bit core 1-333mhz
    * 16kib I-Cache & D-Cache
      * 64-byte line length
      * 2-way set associative, LRU
    * No TLB
    * 7-stage pipeline
    * 32 32-bit registers
    * FPU (COP1)
      * 32-bit single precision
      * 32 32-bit registers
      * [[http://en.wikipedia.org/wiki/IEEE_754|IEEE 754]] compliant
      * Sqrt (28 cycles), div(28 cycles), most others 1 cycle
    * VFPU (COP2)
      * Vector FPU "Macromode only"
      * Designed for vector and matrix ops
      * 128 32-bit registers
        * Reconfigurable as scalar, vector or matrix
        * IEEE 754 Single precision float
      * Can also handle 32-bit int, 16-bit int, 8-bit int, half float
      * vmmul.z vd, vs, vt - 4x4 matrix/vector multiply, 22 cycles

  * Media Block CPU
    * MIPS r4000-based core
    * 2MB Embedded DRAM
    * VME - Virtual Mobile Engine
      * Reconfigurable processor to decode audio & video
      * ATRAC3plus & MP3 for music
        * ATRAC3plus & ADPCM for games but not MP3 due to licensing issues
    * AVC H.264 engine
      * MPEG-4 Hardware accelerator
      * Up to 720x480x30fps
        * Libraries support 480x272x29.97fps

===== Bus =====
  * Main bus shared by CPU and Graphics Engine
  * CPU only has level-1 cache, recomend minimizing memory usage
  * Cache miss  ~70 cycles
  * VRAM read  ~44 cycles
    * contention with GE
  * Scratchpad read ~38 cycles

===== Graphics =====
  * Graphics Engine (GE)
    * 2MB Embedded DRAM
    * Supports Lighting, skinning (8 weights), morphing, subdivision, pixel operations
    * Operates at bus speed (default 111mhz)
    * 3.5GB/s Bus bandwidth
    * 444 Mpixels/sec fill rate
    * 23 Mploys/sec T&L

===== Storage =====
   * UMD 
     * [[http://www.ecma-international.org/publications/standards/Ecma-365.htm|UMD 1.8 GiB DISC]]

===== Ports =====
   * Serial-Port (RS-232)
     * [[http://mc.pp.se/psp/phones.xhtml]]

   * USB-Port