Depending on how it fails, some games seem to want the SPC700's RAM to be initialized on power-up.
While a couple variations have been observed, they all do essentially the same thing: alternating blocks of 0/FF.
The games seem to keep going until they hit the other block.
Common SNES emulator practice is to flood-fill RAM with bit 5 of the address (but this doesn't fix Panic Bomber World. Already tried it). I believe Overload (of DSP-* fame) discovered that pattern.
