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Broadway (processor)

From Wikipedia, the free encyclopedia
Not to be confused withBroadwell (microarchitecture).
32-bit CPU for the Wii
Broadway
IBM Broadway microprocessor from the inside of aWii. The reference to Canada in the picture is related to where it was packaged i.e. by IBM Canada inBromont.
General information
Launched2006
DiscontinuedOctober 22nd, 2013
Designed byIBM andNintendo
Common manufacturer
Performance
Max.CPUclock rate729 MHz
Physical specifications
Cores
  • 1
GPUHollywood
Cache
L1cache32/32 kB
L2 cache256 kB
Architecture and classification
ApplicationWii
Technology node90 nm (2006–2007), 65 nm (2007–2013)
MicroarchitecturePowerPC G3
Instruction setPowerPC (PowerPC ISA 1.10)
Products, models, variants
Variant
History
PredecessorGekko
SuccessorEspresso
POWER,PowerPC, andPower ISA architectures
NXP (formerly Freescale and Motorola)
IBM
IBM/Nintendo
Other
Related links
Cancelled in gray,historic in italic

Broadway is the codename of the32-bitcentral processing unit (CPU) used inNintendo'sWii home video game console. It was designed byIBM, and was initially produced using a90 nmSOI process and later produced with a65 nmSOI process.

According to IBM, the processor consumes 20% less power than its predecessor, the 180 nmGekko used in theGameCubevideo game console.[1]

Broadway was produced by IBM at their semiconductor development and manufacturing facility inEast Fishkill,New York (now owned byGlobalFoundries). The bond, assembly, and test operation for the Broadway module was performed at the IBM facility inBromont,Quebec. Very few official details have been released to the public by Nintendo or IBM; unofficial reports claim it is derived from the 486MHzGekko architecture used in the GameCube and runs 50% faster at 729 MHz.[2]

ThePowerPC 750CL, released in 2006, is a stock CPU offered by IBM; it is virtually identical to Broadway, but was provided in multiple clock speed variants (ranging from 400 MHz–1000 MHz.)[3][4][5]

Specifications

[edit]
  • 90 nanometer process technology,shrunk to 65 nm in 2007.[6]
  • SuperscalarOut-of-order executionPowerPC core, specially modified for the Wii platform
  • IBMsilicon on insulator (SOI) technology
  • Backward compatible with theGekko processor
  • 729 MHz
  • 4 stages long Two integerALUs (IU1 and IU2) – 32 bit
  • 7 stages long 64-bit floating-point unit (FPU) (or 2 × 32-bit SIMD, often found under the denomination "paired singles")
  • Branch Prediction Unit (BPU)
  • Load-Store Unit (LSU)
  • System Register Unit (SRU)
  • Memory Management Unit (MMU)
  • Branch Target Instruction Cache (BTIC)
  • SIMD Instructions – PowerPC750 + Roughly 50 newSIMD instructions, geared toward3D graphics
  • 64 kB L1 cache (32 kB instruction + 32 kB data)
  • 256 kB L2 cache
  • 2.9 GFLOPS

External bus

[edit]
  • 64-bit
  • 243 MHz
  • 1.944gigabytes per second bandwidth

Gallery

[edit]
Broadway
39X6735, 2006
90 nm, 21×21 mm package
Broadway A
43E4048, 2006-2007
90 nm, 21×21 mm package
Broadway B
43E5070, 2007-2008
65 nm, 21×21 mm package
Broadway-1
48J2662, 2008-2016
65 nm, 15×15 mm package
These images are illustrations and only approximately to scale.

References

[edit]
  1. ^IBM (2006)."IBM Ships First Microchips for Nintendo's Wii Video Game System". Archived fromthe original on October 11, 2006. Retrieved2006-09-08.
  2. ^"Wii Technical Specification, Wii". Archived fromthe original on 2011-08-10. Retrieved2009-05-29.
  3. ^"IBM Broadway RISC Microprocessor User's Manual, v0.6"(PDF). p. 61. Archived fromthe original(PDF) on 2013-12-04.
  4. ^"IBM PowerPC 750CL Microprocessor Revision Level DD2.x"(PDF). Archived fromthe original(PDF) on 2013-06-03.
  5. ^"IBM PowerPC 750CL RISC Microprocessor User's Manual"(PDF). Archived fromthe original(PDF) on 2012-11-15.
  6. ^"Wii U CPU |Espresso| die Photo - Courtesy of Chipworks".
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