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by djmips
2343 days ago
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Moving to the much later Gamecube, it supported a locked cache mechanism that inter-operated with DMA. That way you can get your code in half the cache and streaming the data through the other half via DMA. Code runs guaranteed at max CPU speeds, never evicted. Data speeds are also fast when you orchestrate your DMA to cache nicely. Instead of fancy locked cache or other cache tricks, the PS1 and PS2 also had scratchpads that ran at full speed. 1K for PS1 / 16KB for PS2. Very useful. |
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