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The '''Broadway''' is the Wii's main CPU. It is a 32-bit PowerPC CPU based on the PowerPC 750CL. It is based on the GameCube [[Gekko]] CPU design, being almost identical other than an overclock and the addition of the HID4 register.
The '''Broadway''' is the Wii's main CPU. It is a 32-bit PowerPC CPU based on the PowerPC 750CL. It is based on the GameCube [[Gekko]] CPU design, being almost identical other than an overclock and the addition of a few new features.
== Versions ==
== New features from Gekko ==
(following text copied from official document "Summary of changes to Gekko User's Manual to turn it into a Broadway User's Manual")
* DD1.0
The major changes from Gekko to Broadway, covered in the UM are:
* DD1.01
* DD1.2
* 1) L2 cache configurable for 32-B fetch mode, 64B-fetch mode or 128B-fetch mode
* DD1.3
* 2) Deeper pipelining on the 60x bus, programmable to max depth of 2, 3 or 4
* DD2.0 (final)
* 3) Number of BATs is increased from 4 to 8 each for I and D
* 4) Addition of the HID4 register (SPRN = 1011) to control the new features.
* 5) TAU functionality is eliminated (but the THRM1-3 regs remain)
* 6) PLL configuration (processor-to-bus frequency ratio) expanded
* 7) Several changes to the signal pins - DRTRY, TLBISYNC, PLL_CFG[4]
* 8) Several Gekko errata are fixed on Broadway.
* 9) The PVR is initially 0x00087100 on Broadway.
==Versions==
*DD1.0
*DD1.01
*DD1.2
*DD1.3
*DD2.0 (final)
Source: clkspeed.dol in [[RVL_UJI_DIAG]]
Source: clkspeed.dol in [[RVL_UJI_DIAG]]
