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Steve F
Joined: 27 Apr 2005
Posts: 75
Location: Texas USA
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 Posted: Sun Aug 14, 2005 3:52 am Post subject: DMA controller chip |
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I noticed on a Sony PowerPoint presentation an illustration from the official development debugger that showed the pipeline traffic while a game was running. Of course they recommend keeping all data paths filled for max benefit of the hardware.
I got to thinking if I wired some 74LS161 counter clock inputs to the DMA chip signal lines for the different data paths, and bussed the output of the counters back to my PC, I could measure pipeline bandwidths in realtime. I'm guessing $20 in parts and a couple days work to set it up.
Anybody know which chip is the DMA controller? I've looked on the internet for schematics and found nada. Schematics would help a bunch. |
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Saotome
Joined: 03 Apr 2004
Posts: 182
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| Posted: Sun Aug 14, 2005 4:09 am Post subject: |
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| Steve F wrote: | | Anybody know which chip is the DMA controller? |
It's the big one, with "EE" written on it :P
I'm not really sure, but most of the slides i've seen about the EE show the DMAC inside the EE-block.
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