okay - I feel much better about this now - I'm, ready for @Tanuki to solve all my PPU and speed issues for me now that I'm fairly confident in the CPU and debugger
@Tanuki its checking the vblank bit in ppustatus register. It waits for two full frame redraws to resync the ppu and cpu after a reset. The third inf loop at 8057 is after nmi is enabled and the next vblank after that causes the handler to be called
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