PlayStation technical specifications

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This article is about the technical specification of Sony's original PlayStation console. For technical specifications of Sony's later home consoles, see #See also.

The PlayStation technical specifications[1][2][3][4][5][6][7][8] describe the various components of the original PlayStation video game console.

Central processing unit (CPU)[edit]

LSI LR333x0-based Core
Geometry Transformation Engine (GTE or Cop2)[2]
Motion Decoder (MDEC)
  • Also residing within the main CPU, enables full screen, high quality FMV playback and is responsible for decompressing images and video into RAM.
  • Operating performance: 80 MIPS
  • Documented device mode is to read three RLE-encoded 16×16 macroblocks, run IDCT and assemble a single 16×16 RGB macroblock.
  • Output data may be transferred directly to GPU via DMA.
  • It is possible to overwrite IDCT matrix and some additional parameters, however MDEC internal instruction set was never documented.
  • Features:
    • Compatible with MJPEG and H.261 files
    • Directly connected to CPU bus
An SCPH-1001 motherboard.
An SCPH-9001 motherboard
System Control Coprocessor (Cop0)[2]
  • This unit is part of the CPU. Has 16 32-bit control registers.
  • Modified from the original R3000A cop0 architecture, with the addition of a few registers and functions.
  • Controls memory management through virtual memory technique, system interrupts, exception handling, and breakpoints.


  • MB main DRAM[2]
  • Additional RAM memory is integrated with the GPU (including a 1 MB frame buffer) and SPU (512 KB), see below for details.
  • Cache RAM memory for CPU core and CD-ROM. See the relevant sections for details.
  • Flash RAM support through the use of memory cards, see below.
  • BIOS stored on 512 kB ROM

Graphics processing unit (GPU)[edit]

32-bit Sony GPU

Sound processing unit (SPU)[edit]

16-Bit Sony SPU
  • Supports ADPCM sources with up to 24 channels
  • Sampling rate of up to 44.1 kHz
  • 512 kB RAM
  • PCM audio source
  • Digital effects include:
  • Pitch Modulation
  • Envelope
  • Looping
  • Digital Reverb
  • Load up to 512K of sampled waveforms
  • Supports MIDI Instruments

I/O system and connectivity[edit]

CD-ROM drive
  • (660MB maximum storage capacity, double speed CD-ROM drive)
  • 2×, with a maximum data throughput of 300 kB/s(Double speed), 150 KB/sec. (Normal)
  • XA Mode 2 compliant
  • Audio CD play
  • CD-DA (CD-Digital Audio)
  • 128 kB buffer
Two control pads via connectors
  • Expandable with multitap connector
Backup Flash RAM support
  • Two removable cards
  • Each card has 128 KB Flash Memory
  • OS support for File Save, Retrieve and Remove
Video and audio connectivity
Serial and parallel ports

See also[edit]