OpenMW Extensions:

Segment 0:
(not implemented yet)
opcodes 0x20-0x3f unused

Segment 1:
(not implemented yet)
opcodes 0x20-0x3f unused

Segment 2:
(not implemented yet)
opcodes 0x200-0x3ff unused

Segment 3:
(not implemented yet)
opcodes 0x200-0x3ff unused

Segment 4:
(not implemented yet)
opcodes 0x200-0x3ff unused

Segment 5:
op 0x2000000: CellChanged
op 0x2000001: Say
op 0x2000002: SayDone
op 0x2000003: StreamMusic
op 0x2000004: PlaySound
op 0x2000005: PlaySoundVP
op 0x2000006: PlaySound3D
op 0x2000007: PlaySound3DVP
op 0x2000008: PlayLoopSound3D
op 0x2000009: PlayLoopSound3DVP
op 0x200000a: StopSound
op 0x200000b: GetSoundPlaying
op 0x200000c: XBox (always 0)
op 0x200000d: OnActivate
op 0x200000e: EnableBirthMenu
op 0x200000f: EnableClassMenu
op 0x2000010: EnableNameMenu
op 0x2000011: EnableRaceMenu
op 0x2000012: EnableStatsReviewMenu
op 0x2000013: EnableInventoryMenu
op 0x2000014: EnableMagicMenu
op 0x2000015: EnableMapMenu
op 0x2000016: EnableStatsMenu
op 0x2000017: EnableRest
op 0x2000018: ShowRestMenu
op 0x2000019: Say, explicit reference
op 0x200001a: SayDone, explicit reference
op 0x200001b: PlaySound3D, explicit reference
op 0x200001c: PlaySound3DVP, explicit reference
op 0x200001d: PlayLoopSound3D, explicit reference
op 0x200001e: PlayLoopSound3DVP, explicit reference
op 0x200001f: StopSound, explicit reference
op 0x2000020: GetSoundPlaying, explicit reference
opcodes 0x2000021-0x3ffffff unused

