Sonic the Hedgehog (Sega Master System, Game Gear)/ROM map

The following article is a ROM map for Sonic the Hedgehog (Sega Master System, Game Gear).

Note that sizes are listed in decimal.

Offset	Size		Description
	---------------	-----------
$0003B	43		Ancient dev text
$0024B	64		Labyrinth underwater palette
$00D3D	1		Main Map Music
$00F0E  32		Main map palette
$00F2E	32		Main Map 2 palette
$00F84	255		Route data part 1
$010AB	342		Route data part 2
$01209	36		Level name pointers
$0122D	15		Green Hill text
$0123C	15		Bridge text
$0124B	15		Jungle text
$0125A	15		Labyrinth text
$01269	15		Scrap Brain text
$01278	15		Sky Base text
$012D9	1		Title Screen Music
$0133C	1		X Value of Sonic's Finger
$0133F	1		Y value of Sonic's Finger
$01352	32		Press Button text
$01372	74		Sonic's finger animation frames
$013BC	37		Sonic's finger animation Graphics
$013E1	32		Title Screen Palette
$014C1	1		Continue sound effect
$014FC	32		Game over palette
$017D8	1		Chaos Emerald tally sound effect
$0180D	1		Sonic Left tally sound effect
$01854	1		Special Bonus tally sound effect
$0197E	48		Finishing text
$01B8D	32		Level Complete Palette
$01F7D	1		Lightning (Sky Base 1 sound effect)
$01F9D	16		Sky Base 1 Lightning palette
$0202E	1		Robotnik post sound effect
$02036	1		Life post sound effect
$02040	1		Bonus sound effect
$023FE	3		Time you start with
$02401	3		Time you start with after hitting down box and dying
$02405	24		Times for bonus levels
$02609	1		Chaos Emeralds released Jingle
$02709	1		Credits Music
$02905	465		Credits text
$02AD6	32		Credits palette
$03641	1		Death Music
$036BB	1		Sonic hurt sound effect
$036EE	1		Hit enemy & monitors sound effect
$039CE	1		Life gained (100 rings) sound effect
$039D5	1		Ring (also post) sound effect
$03A00	1		Life (50000 points gained) sound effect
$05042	1		Death Drowned Music
$0506A	1		Labyrinth countdown sound effect
$050A3	1		Jumping sound effect
$050DC	1		Sonic spin sound effect
$051FE	1		Sonic screech sound effect
$0550C	1		Sonic rolling launch (green hill) sound effect
$0552A	1		Left spring sound effect
$05553	1		up spring right side sound effect
$05575	1		right spring sound effect
$055AF	1		Splash in water sound effect
$055DF	1		up spring middle sound effect
$055E8	1		Whistle through block (GHZ2) sound effect
$05639	1		Teleport sound effect
$05724	1		star bumper sound effect
$0576E	1		Purple spring sound effect (bonus)
$0577E	1		Orange spring sound effect (bonus)
$0578E	1		Green spring sound effect (bonus)
$057CA	1		Long bumper sound effect
$05C4D	1		Extra life (monitor) sound effect
$05D24	1		Invincibility Music
$05EDC	1		Chaos Emerald Gained Music
$05FCF	1		Level Completed (post) Music
$05FD2	1		Post lands sound effect
$0602E	1		Spinning post sound effect
$0626C	16		End post palette
$0627C	34		Level palette pointers
$0629E	32		Green hill load palette
$062BE	48		Green Hill auto palette
$062EE	32		Bridge load palette
$0630E	48		Bridge auto palette
$0633E	32		Jungle load palette
$0635E	48		Jungle auto palette
$0638E	32		Labyrinth load palette
$063AE	48		Labyrinth auto palette
$063DE	32		Scrap Brain load palette
$063FE	64		Scrap Brain auto palette
$0643E	32		Sky Base load palette
$0645E	64		Sky Base auto palette
$0649E	64		Sky Base lightning charge auto palette
$064DE	64		Sky Base lightning fire auto palette
$0651E	64		Sky Base 2 auto palette
$0655E	32		Bonus load palette
$0657E	16		Bonus auto palette
$0658E	32		Sky Base 3/Inside load palette
$065AE	64		Sky Base 3/Inside auto palette
$0666A	1		Crab claw shoot sound effect
$06C92	1		Fly shoot sound effect
$06FAF	1		Chameleon shoot sound effect
$07045	1		Green Hill Boss Music
$0731C	16		Boss sprite palette
$07487	1		Level Completed (machine) music
$07818	1		Robotnik hit sound effect
$07AA4	1		Robotnik beaten sound effect
$07D54	1		Fish out of water sound effect
$08088	1		Jungle Boss Music
$0829E	1		Bomb explode (Jungle 3) sound effect
$08425	1		Bridge falling sound effect
$084D4	1		Bridge Boss Music
$085A5	1		Robotnik shoot projectiles (bridge) sound effect
$08705	1		Seesaw (bridge) sound effect
$08BB9	1		Spike pole (labyrinth) sound effect
$08C8B	1		Fireball (labyrinth) sound effect
$092A9	1		Labyrinth Boss Music
$09476	1		Robotnik shoot projectiles (labyrinth) sound effect
$097E1	1		Sonic breathing sound effect
$09B67	1		Pink bumper sound effect
$09C13	1		Fireball (scrap brain) not in view? sound effect
$09C55	1		Fireball (scrap brain) sound effect
$09D47	1		Fire (scrap brain) sound effect
$09EC1	1		Door raise sound effect
$09ED1	1		Door lower sound effect
$0A128	1		Lightning orb sound effect
$0A460	1		Switch sound effect
$0A82A	1		Scrap Brain Boss Music
$0A9B4	1		Robotnik platform rise (scrap brain) sound effect
$0AC1A	1		Exploder (sky base 2) sound effect
$0B631	1		Turret shooting (sky base) sound effect
$0B68D	1		Sky Base Boss Music
$0B7CB	1		Hits before glass breaks
$0B7E3	1		Glass break sound effect
$0B81A	1		Glass hit sound effect
$0BA49	176		Glass break tiles
$0BC2F	1		Hits before lightning wall change
$0BC56	1		Continuous Lightning wall 1 (sky base 3) sound effect
$0BCA2	1		Lightning wall 2 (sky base 3) sound effect
$0BCC7	22		Tiles used for lightning wall
$0BDCE	unknown		Plasma ball tiles?
$0BE5A	1		Teleport out (ending) sound effect
$0BFF8	8		Empty
$0C000	1814		Instrument data?
$0C716	42		Music data pointers
$0C740	144		SFX data pointers
$0C7D0	1338		Green Hill Music
$0CD0A	1344		Hidden Marble Zone Music
$0D24A	1280		Jungle Music
$0D74A	1029		Bridge Music
$0DB4F	1624		Scrap Brain Music
$0E1A7	796		Sky Base Music
$0E4C3	377		Title Screen Music
$0E63C	200		Map SFX
$0E704	432		Invincibility Music
$0E8B4	221		Act Complete Music
$0E991	303		Death Music
$0EAC0	660		Boss Music
$0ED54	984		Ending Music
$0F12C	1248		Bonus Music
$0F60C	896		Labyrinth Music
$0F98C	154		Chaos Emeralds released [SFX]
$0FA26	257		Chaos Emerald [SFX]
$0FB27	28		Jumping SFX
$0FB43	49		Hit enemy SFX
$0FB74	36		Ring SFX
$0FB98	39		Screech SFX
$0FBBF	39		Spring SFX
$0FBE6	50		Whistle/Roll on ramp SFX
$0FC18	42		Rolling SFX
$0FC42	28		Bumper SFX
$0FC5E	48		Unused 08 SFX
$0FC8E	41		Extra Life SFX
$0FCB7	33		Enemy Shot SFX
$0FCD8	37		Spinning Post SFX
$0FCFD	39		Post lands SFX
$0FD24	62		Unused 0D SFX
$0FD62	38		Hurt SFX
$0FD88	41		Water SFX
$0FDB1	53		Lightning SFX
$0FDE6	38		Fire SBZ SFX
$0FE0C	35		Fireball/Bridge piece falling SFX
$0FE2F	25		Door raise SFX
$0FE48	20		Switch/Countdown SFX
$0FE5C	24		Pressure Noise SFX
$0FE74	48		Cannon SFX
$0FEA4	40		LZ Spike Raise SFX
$0FECC	28		Unused 1E SFX
$0FEE8	32		Fireball/Bridge piece falling SFX 2
$0FF08	70		Glass break SFX
$0FF4E	53		Sonic Bubble SFX
$0FF83	46		Unused 23 SFX
$0FFB1	79		Empty
$10000	2944		Green Hill 8x8 -> 32x32 block gfx
$10B80	2304		Bridge 8x8 -> 32x32 block gfx
$11480	2560		Jungle 8x8 -> 32x32 block gfx
$11E80	2816		Labyrinth 8x8 -> 32x32 block gfx
$12980	3072		Scrap Brain 8x8 -> 32x32 block gfx
$13580	3456		Sky Base 1,2 8x8 -> 32x32 block gfx
$14300	1664		Sky Base 3 8x8 -> 32x32 block gfx
$14980	2048		Bonus 8x8 -> 32x32 block gfx
$15180	1024		Item box, emerald art
$15580	2		Green Hill 1 L.H. pointer
$15582	2		Green Hill 2 L.H. Pointer
$15584	2		Green Hill 3 L.H. Pointer
$15586	2		Bridge 1 L.H. Pointer
$15588	2		Bridge 2 L.H. Pointer
$1558A	2		Bridge 3 L.H. Pointer
$1558C	2		Jungle 1 L.H. Pointer
$1558E	2		Jungle 2 L.H. Pointer
$15590	2		Jungle 3 L.H. Pointer
$15592	2		Labyrinth 1 L.H. Pointer
$15594	2		Labyrinth 2 L.H. Pointer
$15596	2		Labyrinth 3 L.H. Pointer
$15598	2		Scrap Brain 1 L.H. Pointer
$1559A	2		Scrap Brain 2 L.H. Pointer
$1559C	2		Scrap Brain 3 L.H. Pntr
$1559E	2		Sky Base 1 L.H. Pntr
$155A0	2		Sky Base 2 L.H. Pntr
$155A2	2		Sky Base 3 L.H. Pntr
$155A4	2		Ending L.H. Pntr
$155A6	2		Empty
$155A8	2		SB 2 Area 1 -> 2 L.H. Pntr
$155AA	2		SB 2 Area 1 -> 3 L.H. Pntr
$155AC	2		SB 2 Area 2 -> 1 [TP] L.H. Pntr
$155AE	2		SB 2 Area 2 -> 3 [TP] L.H. Pntr
$155B0	2		SB 2 Area 2 -> 1 L.H. Pntr
$155B2	2		SB 2 Area 3 -> 1 L.H. Pntr
$155B4	2		Sky Base 2 area 2 L.H. Pntr
$155B6	2		Sky Base 2 area 2 L.H. Pntr 2
$155B8	2		Bonus 1 L.H. Pntr
$155BA	2		Bonus 2 L.H. Pntr
$155BC	2		Bonus 3 L.H. Pntr
$155BE	2		Bonus 4 L.H. Pntr
$155C0	2		Bonus 5 L.H. Pntr
$155C2	2		Bonus 6 L.H. Pntr
$155C4	2		Bonus 7 L.H. Pntr
$155C6	2		Bonus 8 L.H. Pntr
$155C8	2		Empty
$155CA	37		Green Hill 1 Level Header
$155EF	37		Green Hill 2 Level Header
$15614	37		Green Hill 3 Level Header
$15639	37		Ending Level Header
$1565E	37		Bridge 1 Level Header
$15683	37		Bridge 2 Level Header
$156A8	37		Bridge 3 Level Header
$156CD	37		Jungle 1 Level Header
$156F2	37		Jungle 2 Level Header
$15717	37		Jungle 3 Level Header
$1573C	37		Labyrinth 1 Level Header
$15761	37		Labyrinth 2 Level Header
$15786	37		Labyrinth 3 Level Header
$157AB	37		Scrap Brain 1 Level Header
$157D0	37		Scrap Brain 2 Level Header
$157F5	37		SB 2 Area 1 -> 2 Level Header
$1581A	37		SB 2 Area 1 -> 3 Level Header
$1583F	37		Scrap Brain 3 Level Header
$15864	37		SB 2 Area 2 -> 1 Level Header
$15889	37		SB 2 Area 3 -> 1 Level Header
$158AE	37		SB 2 Area 2 -> 1 [TP] Level Header
$158D3	37		SB 2 Area 2 -> 3 [TP] Level Header
$158F8	37		Sky Base 1 Level Header
$1591D	37		Sky Base 2 Level Header
$15942	37		Sky Base 3 Level Header
$15967	37		Sky Base 2 Area 2 Level Header
$1598C	37		Bonus 1 Level Header
$159B1	37		Bonus 2 Level Header
$159D6	37		Bonus 3 Level Header
$159FB	37		Bonus 4 Level Header
$15A20	37		Bonus 5 Level Header
$15A45	37		Bonus 6 Level Header
$15A6A	37		Bonus 7 Level Header
$15A8F	37		Bonus 8 Level Header
$15AB4	76		Green Hill 1 Sprites
$15B00	67		Green Hill 2 Sprites
$15B43	19		Green Hill 3 Sprites
$15B56	70		Bridge 1 Sprites
$15B9C	58		Bridge 2 Sprites
$15BD6	22		Bridge 3 Sprites
$15BEC	88		Jungle 1 Sprites
$15C44	73		Jungle 2 Sprites
$15C8D	22		Jungle 3 Sprites
$15CA3	79		Labyrinth 1 Sprites
$15CF2	88		Labyrinth 2 Sprites
$15D4A	31		Labyrinth 3 Sprites
$15D69	67		Scrap Brain 1 Sprites
$15DAC	61		Scrap Brain 2 Sprites
$15DE9	76		Scrap Brain 2 area 2 Sprites
$15E35	25		Scrap Brain 2 area 3 Sprites
$15E4E	76		Scrap Brain 3 Sprites
$15E9A	58		Sky Base 1 Sprites
$15ED4	67		Sky Base 2 Sprites
$15F17	10		Sky Base 3 Sprites
$15F21	4		Sky Base 2 area 2 sprites
$15F25	7		Bonus Stage 1 Sprites
$15F2C	10		Bonus Stage 2 Sprites
$15F36	10		Bonus Stage 3 Sprites
$15F40	19		Bonus Stage 4 Sprites
$15F53	19		Bonus Stage 5 Sprites
$15F66	25		Bonus Stage 6 Sprites
$15F7F	22		Bonus Stage 7 Sprites
$15F95	47		Bonus Stage 8 Sprites
$15FC4	60		Empty
$16000	302		Title Screen 8x8 tilemap
$1612E	187		Passed act 8X8 tilemap
$161E9	149		Special stage finished 8x8 tilemap
$1627E	376		Map 1 8x8 tilemap
$163F6	325		Map 1 8x8 tilemap related/beta?
$1653B	368		Map 2 8x8 tilemap
$166AB	339		Map 2 8x8 tilemap related/beta?
$167FE	44		Game Over 8x8 tilemap
$16830	379		Bad End map 8x8 tilemap
$169AB	323		Good End map 8x8 tilemap
$16AEE	371		Credits 8x8 tilemap related/beta?
$16C61	393		Credits 8x8 tilemap
$16DEA	2110		Green Hill 1 Level Layout & Ending
$17628	1633		Green Hill 2 Level Layout
$17C89	813		Green Hill 3 Level Layout
$17FB6	2732		Jungle 1 Level Layout
$18A62	754		Bonus 4 Level Layout
$18D54	1513		Jungle 2 Level Layout
$1933D	1690		Scrap Brain 1 Level Layout
$199D7	2308		Scrap Brain 2 Level Layout
$1A2DB	2296		Scrap Brain 2c Level Layout
$1ABD3	1711		Scrap Brain 2b Level Layout
$1B282	2226		Scrap Brain 3 Level Layout
$1BB34	925		Sky Base 2a Level Layout
$1BED1	1684		Bridge 1 Level Layout
$1C565	2242		Labyrinth 1 Level Layout
$1CE27	3347		Labyrinth 2 Level Layout
$1DB3A	1902		Sky Base 1 Level Layout
$1E2A8	1177		Bridge 2 Level Layout
$1E741	914		Sky Base 3 Level Layout
$1EAD3	302		Sky Base 2b Level Layout
$1EC01	1013		Jungle 3 Level Layout
$1EFF6	761		Labyrinth 3 Level Layout
$1F301	320		Bridge 3 Level Layout
$1F441	778		Bonus 1 Level Layout
$1F74B	606		Bonus 2 Level Layout
$1F9A9	505		Bonus 3 Level Layout
$1FBA2	1118		empty data
$20000	24576		Sonic art compressed?
$26000	53222		Tile & Sprite sets compressed art
$32FE6	43586		Level art compressed
$3DA28	9465		Sprite art/Mappings compressed?
$3FF21	223		Empty