Timothy A. Seufert writes: > At 4:39 PM -0500 1/12/02, Albert D. Cahalan wrote:
>> Bite off a small chunk of the image. Pulling a number out of >> my ass, I'll say 128x128 pixels and 4 frames deep. This fits >> nicely into my 1 MB L2 cache. Go with 64x64 for the MPC7410. > > You don't need to cut cache use by 1/4 on the 7410. It's got almost > the same L2 cache scheme as the 7400: they added one address bit so > it can use up to 2 MB of SRAM, and it can now use half or all of the > SRAM as memory instead of cache. I think all of Apple's 7410 systems > have 1 MB L2, and naturally Apple configures it all as cache. > > Were you thinking of the 7450? It's the one that has 256 KB of > on-die L2. Keep in mind that it still has an interface for external > cache, which is now L3. Apple ships low end 7450 systems with no L3 > and medium to high range systems with 2 MB L3. Yes, I meant the 7450. Configuring the 7410 L2 or the 7450 L3 as SRAM would be going way, way, too far I think. Not that it wouldn't be fun to try, but then the box pretty much becomes a dedicated video player.
