Add a disassembly of the current MIPS instruction for a Guru Meditation screen.
Add a missing instruction to the Guru Meditation disassembler: XORI.
Some more minor assembler optimisations.
Sound volatility is #define'd away. Inspired by CATSFC commit 88135c52f8367549d6c864df193018f5a6cb2b35.
Show a Guru Meditation screen on the Upper Screen if a GBA unmapped address jump occurs.
Merge branch 'arm-guru-meditation'
Remove a hack in arm_load_opcode that might not be necessary. Thanks to Normmatt for this code review.