Broadway CPU
Operating speed: 729 MHz
Bus to main memory: 243 MHz, 64 bits (maximum bandwidth: 1.9 gigabytes/sec)
32-kilobyte 8-way set-associative L1 instruction cache
32-kilobyte 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 regis
ter 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 GameCubes CPU (Gekko).
