python-scripts: step_nv2a.py is buggy

[JayFoxRox]

The original concept for this did not work out. This needs further investigation.

The idea was:

• Pause the puller (= pusher comes to halt as there is no free space)
• Pause the pusher (= disable CACHE being overwritten)
• Set pusher address as puller address (= puller has nothing to do)
• Unpause the puller (= puller still has nothing to do)
• Set pusher address to new target puller address (= puller runs until pusher address)

Once the fake pusher address reaches the real pusher address (= no more data):

• Pause the puller (= FIFO is idle now)
• Assert that pusher address is at real pusher address (= need to continue writing at proper address)
• Unpause pusher (= let pusher fill CACHE)
• Pause pusher (= pusher should have advanced / filled CACHE)

Now the initial procedure can be repeated from the second step

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The issue, however, is that even with the pusher paused and pusher address = puller address, the entire CACHE seems to be filled with the same method / data pair.
This can also have implications for the general pausing of the NV2A so that should be fixed / cleared up asap!

[JayFoxRox]

Moved to XboxDev/nv2a-trace