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.
