Difference between revisions of "Hardware"

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=TODO move=
 
=TODO move=
 
==Wii specs==
 
==Wii specs==
===CPU===
 
* IBM '[http://en.wikipedia.org/wiki/Broadway_%28microprocessor%29 Broadway]' 90 nm based on IBM's Power architecture.
 
*Runs at a speed of 729 MHz. Maximum Bandwidth is 1.9 GB/s.
 
*Bus to main memory: 243 MHz, 64 bits (maximum bandwidth: 1.9 GB/s)
 
*32 KB 8-way set-associative L1 instruction cache
 
*32 KB 8-way set-associative L1 data cache (can set up 16-kilobyte data scratch pad)
 
*Superscalar microprocessor with six execution units (floating-point unit, branching unit, system register unit, load/store unit, two integer units)
 
*DMA unit (15-entry DMA request queue) used by 16-kilobyte data scratch pad
 
*Write-gather buffer for writing graphics command lists to the graphics chip
 
*Onboard 256-kilobyte 2-way set-associative L2 integrated cache
 
*Two, 32-bit integer units (IU)
 
*One floating point unit (FPU) (supports single precision (32-bit) and double precision (64-bit))
 
*The FPU supports paired single floating point (FP/PS)
 
*The FPU supports paired single multiply add (ps_madd). Most FP/PS instructions can be issued in each cycle and completed in three cycles.
 
*Fixed-point to floating-point conversion can be performed at the same time as FPU register load and store, with no loss in performance.
 
*The branch unit supports static branch prediction and dynamic branch prediction.
 
*When an instruction is stalled on data, the next instruction can be issued and executed. All instructions maintain program logic and will complete in the correct program order.
 
*Supports three L2 cache fetch modes: 32-Byte, 64-Byte, and 128-Byte.
 
*Supports these bus pipeline depth levels: level 2, level 3, and level 4.
 
Reference Information: Broadway is upward compatible with Nintendo GameCube’s CPU (Gekko).
 
 
*Broadway CPU version is 87102, Gekko is 83410. Source: http://forum.wiibrew.org/viewtopic.php?t=210
 
*Information about its [[Broadway/Registers|registers]] is available
 
 
 
===Graphics===
 
===Graphics===
 
* ATi '[[Hollywood]]' processor
 
* ATi '[[Hollywood]]' processor
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* Supports single layer 4.7 GB and dual layered 8.51 GB discs. Nintendo GameCube discs are also supported.
 
* Supports single layer 4.7 GB and dual layered 8.51 GB discs. Nintendo GameCube discs are also supported.
  
===Wireless===
 
* Broadcom BCM4318 Wi-Fi transceiver
 
* Broadcom BCM2045 [[Bluetooth]] device connected via USB
 
 
==References==
 
# http://www.techonline.com/showArticle.jhtml?articleID=194500380
 
# http://techon.nikkeibp.co.jp/english/NEWS_EN/20061127/124495/
 
# http://bcm-specs.sipsolutions.net/
 
  
 
[[Category:Hardware]]
 
[[Category:Hardware]]

Revision as of 17:13, 26 February 2009

Wii hardware diagram (somewhat outdated/incorrect)
Starlet Broadway Common Other

TODO move

Wii specs

Graphics

  • ATi 'Hollywood' processor
  • Runs at a speed of 243 MHz.

Includes:

  • Graphics processing unit (with 3 MB of eDRAM)
  • Audio DSP
  • I/O Bridge
  • 24 MB of internal main memory
  • Internal main memory operates at 486 MHz.

Maximum bandwidth between Hollywood and internal main memory: 3.9 GB/s

  • Possible to locate a program here

Reference Information: Hollywood is similar to Nintendo GameCube’s Flipper and Splash components.

The Hollywood is a multi-chip package composed of two dies, named Vegas and Napa. Vegas is the GPU, and is also responsible for I/O functions, including memory access. Napa is the DSP, and includes 24 MiB of 1T RAM on the die. Vegas has direct access to 3 MiB of 1T RAM for use as a frame buffer and texture storage.

  • Qimonda HYB18H51232 64 MiB GDDR3 graphics RAM

See Video Output for more information on the output connectors and the available video modes.

Memory

  • Elpida S1616AGTA 16-Mbit SDRAM
  • Samsung K9F4G08U0A 65-nm, 4-Gbit NAND flash
  • 64 MB of GDDR3 (MEM2) as the external main memory. Can be accessed from the CPU and GPU with a bandwidth of 4GB/s and can also store programs in the MEM2.

Optical Drive

  • Supports single layer 4.7 GB and dual layered 8.51 GB discs. Nintendo GameCube discs are also supported.