Good question.
PS1 - PS2
I will now post specs.
PS1
Central processing unit
An early PlayStation motherboard.
MIPS R3000A-compatible (R3051) 32bit RISC chip running at 33.8688 MHz
The chip is manufactured by LSI Logic Corp. with technology licensed from SGI. The chip also contains the Geometry Transformation Engine and the Data Decompression Engine.
Features:
- Operating performance of 30 MIPS
- Bus bandwidth 132 MB/s
- 4 KB Instruction Cache
- 1 KB non-associative SRAMData Cache
Geometry transformation engine
This engine is inside the main CPU chip. It gives it additional vector math instructions used for the 3D graphics.
Features:
- Operating performance of 66 MIPS
- 360,000 flat-shaded polygons per second
- 180,000 texture mapped and light-sourced polygons per second
Sony originally gave the polygon count as:
- 1 million flat-shaded polygons per second;
- 500,000 texture mapped and light-sourced polygons per second.
These figures were given as a ballpark figure for performance under optimal circumstances, and so are unrealistic under normal usage.
Data decompression engine
This engine is also inside the main CPU. It is responsible for decompressing images and video. 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
- Operating Performance of 80 MIPS
- Directly connected to CPU Bus
Graphics processing unit
This chip is separate to the CPU and handles all the 2D graphics processing, which includes the transformed 3D polygons.
Features:
- Maximum of 16.7 million colors (24-bit color depth)
- Resolutions from 256×224 to 640×480
- Adjustable frame buffer
- Unlimited color lookup tables
- Maximum of 4000 8×8 pixel sprites with individual scaling and rotation
- Emulation of simultaneous backgrounds (for parallax scrolling)
- Flat or Gouraud shading, and texture mapping
Sound processing unit
Features:
- Can handle ADPCM sources with up to 24 channels and up to 44.1 kHzsampling rate
Memory
- Main RAM: 2 MB
- Video RAM: 1 MB
- Sound RAM: 512 KB
- CD-ROM Buffer: 32 KB
- Operating System ROM: 512 KB
- PlayStation Memory Cards have 128 KB of space in an EEPROM
CD-ROM drive
Features:
- 2x, with a maximum data throughput of 300 KB/s
- XA Mode 2 Compliant
- CD-DA (CD-Digital Audio)
PS2
The specifications of the PlayStation 2 console are as follows, with hardware revisions:
- CPU: 64-bit[3][4] "Emotion Engine" clocked at 294.912 MHz (299 MHz on newer versions), 10.5 million transistors
- System Memory: 32 MB(32×220 bytes) Direct Rambus or RDRAM
- Memory bus Bandwidth: 3.2 gigabytes per second
- Main processor: MIPS R5900 CPU core, 64 bit, little endian (mipsel).
- Coprocessor: 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 150 MHz.
- VU0 typically used for polygon transformations optionally (under parallel or serial connection), physics and other gameplay based things
- Parallel performs transformations in parallel in the same moment
- Serial (series) performs transformations in a series of steps or stages coherent to the design of each VU
- Stage 1: VU0 does perspective and cam, boning, animations and movement laws per triangle
- Stage 2: VU1 does colors, lights and effects per triangle)
- VU1 typically used for polygon transformations, lighting and other visual based calculations
- Texture matrix able for 2 units (UV/ST)[38]
- Floating Point Performance: 6.2 gigaFLOPS (single precision 32-bit floating point)
- FPU 0.64 gigaFLOPS
- VU0 2.44 gigaFLOPS
- VU1 3.08 gigaFLOPS (with Internal 0.64 gigaFLOP EFU)
- 3D CG Geometric transformation(VU0+VU1 parallel): 66 million polygons per second
- 3D CG Geometric transformations under curved surfaces: 16 million polygons per second
- 3D CG Geometric transformations at peak bones/movements/effects(textures)/lights(VU0+VU1): 15-20 million polygons per second (dependent on if series or parallel T&L)
- Actual real-world polygons (per frame):500-650k at 30fps, 250-325k at 60fps
- Compressed Image Decoder: MPEG-2
- I/O Processor interconnection: Remote Procedure Call over a serial link, DMA controller for bulk transfer
- Cache memory: Instruction: 16 KB(16×210 bytes), Data: 8 KB + 16 KB (ScrP)
- Graphics processing unit: "Graphics Synthesizer" clocked at 147 MHz
- Pixel pipelines: 16
- Video output resolution: variable from 256x224 to 1280x1024 pixels
- 4 MB (4×220 bytes) Embedded DRAMvideo memory bandwidth at 48 gigabytes per second (main system 32 MB can be dedicated into VRAM for off-screen materials)
- Texture buffer bandwidth: 9.6 GB/s
- Frame buffer bandwidth: 38.4 GB/s
- DRAM Bus width: 2560-bit (composed of three independent buses: 1024-bit write, 1024-bit read, 512-bit read/write)
- Pixel Configuration: RGB: Alpha:Z Buffer (24:8, 15:1 for RGB, 16, 24, or 32-bit Z buffer)
- Dedicated connection to: Main CPU and VU1
- Overall Pixel fillrate: 16x147 = 2.352 Gpixel/s (rounded to 2.4 Gpixel/s)
- Pixel fillrate: with no texture, flat shaded 2.4(75,000,000 32pixel raster triangles)
- Pixel fillrate: with 1 full texture(Diffuse Map), Gouraud shaded 1.2 (37,750,000 32-bit pixel raster triangles)
- Pixel fillrate: with 2 full textures(Diffuse map + specular or alpha or other), Gouraud shaded 0.6 (18,750,000 32-bit pixel raster triangles)
- GS effects: AAx2 (poly sorting required)[39], Bilinear, Trilinear, Multi-pass, Palletizing (4-bit = 6:1 ratio, 8-bit = 4:1)
- Multi-pass rendering ability
- Four passes = 300 Mpixel/s (300 Mpixels/s divided by 32 pixels = 9,375,000 triangles/s lost every four passes)[40]
- Audio: "SPU1+SPU2" (SPU1 is actually the CPU clocked at 8 MHz)
- Number of voices: 48 hardware channels of ADPCM on SPU2 plus software-mixed channels
- Sampling Frequency: 44.1 kHz or 48 kHz (selectable)
- Output: Dolby Digital 5.1 Surround sound, DTS (Full motion video only), later games achieved analog 5.1 surround during gameplay through Dolby Pro Logic II
- I/O Processor
- CPU Core: Original PlayStation CPU (MIPS R3000A clocked at 33.8688 MHz or 37.5 MHz)
- Automatically underclocked to 33.8688 MHz to achieve hardware backwards compatibility with original Playstation format games.
- Sub Bus: 32-bit
- Connection to: SPU and CD/DVD controller.
- Interfaces:
- 2 proprietary PlayStation controller ports (250 kHz clock for PS1 and 500 kHz for PS2 controllers)
- 2 proprietary Memory Card slots using MagicGateencryption (250 kHz for PS1 cards, up to 2 MHz for PS2 cards)
- Expansion Bay (PCMCIA on early models for PCMCIA Network Adaptor and External Hard Disk Drive) DEV9 port for Network Adaptor
- Modem, Ethernet and Internal Hard Disk Drive (single IDE/ATA channel, possible to hook 2 devices to.)
- FireWire (only in SCPH 10xxx - 3xxxx)
- Infrared remote control port (SCPH 5000x and newer) - IEEE 1394 port removed and Infrared port added in SCPH-50000 and later hardware versions.
- 2 USB 1.1 ports with an OHCI-compatible controller.
- Disc Drive type: proprietary interface through a custom micro-controller + DSP chip. 24x speed (PlayStation 2 format CD-ROM, PlayStation format CD-ROM), 4x (Supported DVD formats) - Region-locked with anti-copy protection. Can't read "Gold Discs" i.e., normal CD-ROMs.
- Supported Disc Media: PlayStation 2 format CD-ROM, PlayStation format CD-ROM, Compact Disc Audio, PlayStation 2 format DVD-ROM (4.7 GB)(some games on DVD9 8.5 GB), DVD Video (4.7 GB), DVD-9 (8.5 GB Dual-Layer). Later models are DVD+RW, and DVD-RW compatible.
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