Difference between revisions of "Broadway"
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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 '''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. |
| − | == | + | == 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]] | ||
Latest revision as of 16:00, 6 May 2020
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.
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")
The major changes from Gekko to Broadway, covered in the UM are:
- 1) L2 cache configurable for 32-B fetch mode, 64B-fetch mode or 128B-fetch mode
- 2) Deeper pipelining on the 60x bus, programmable to max depth of 2, 3 or 4
- 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
