Sonic Spinball (Sega Master System)

Sonic Spinball
Also known as: Sonic the Hedgehog Spinball Developer: Sega Interactive Publishers: Sega (EU/AU), Tec Toy (BR) Platform: Sega Master System Released in EU: 1994 Released in AU: 1994 Released in BR: January 25, 1995 This game has uncompiled source code. This game has a hidden developer message. This game has hidden development-related text. This game has debugging material. This game has a hidden level select.

The Master System Sonic Spinball is a rushed port of the already rushed Game Gear version, which is itself a demake of the rushed Genesis version.

To do: Document the other codes in the Sound Test.

Level Skip

In the Options menu, play sound effects 00, 02, 01, 05, 06, 06 in the Sound Test. Now, during gameplay, pause and press Down to go to the next stage.

Free-Movement Mode

Also in the Options menu, play sound effects 00, 09, 00, 01, 06, 08 (the screen will shake to confirm). Now, during gameplay, pause and press 2.

Build Date

Present at 0x4C8D:

1994-05-30 P.M. FINAL REV. 22 (M)

This can be displayed in the Options menu by playing sound effects 0, 5, 0, 3, 6, 0.

Uncompiled Code

Present at 1EFAE is a fragment of code, likely from a printout of the code.

FFFFFFFFFFFFFFFFFFFFFF52
:103E8000FFFFFFC025F60FC025A00FC025580EFF6D
:103E9000FFFFFFC025F60FC025A00FC025580EFF5D
:103EA000FFFFFFC025F60FC025A00FC025580EFF4D
:103EB000FFFFFF020010000A001B0019021A020F88
:103EC0000014001A0018000A020E0018021600184A
:103ED0000415001602190015041604150217000D2A
:103EE00000130215061A04130009001B0219040A24
:103EF0000419061A060B001B041A081A0A080019EE
:103F0000081A0C16061A0E1A1018060D021C000FBD
:103F1000021B060C001B081B0A1B0C1B0E1B101D92
:103F2000001C02FFFF1B000C0009001A021A001BF4
:103F300002160016021B041B061D00FFFF1A0019C3
:103F40000011001C00130014000E00080009000AF4
:103F50000011010D001C010B000C000F0017001DCB
:103F6000001D011A01FFFF12001900140012010BBD
:103F700000100010011300170018001701FFFF7A4E
:103F80003E1A32FFFF3224C82A0280010000097E57
:103F900023666F22D3D7AF32D6D73E1032DED7C9D1
:103FA000C9C9C93289DA7832D7D77932D8D73A89AC
:103FB000DAC3A27FC9C9C9C97EB7C8E5CDB67FE15A
:103FC0002318F4F3DBBE3A0CC8D3BF3A0DC8F64051
:103FD000D3BF010007AFD3BE0B78B120F8FBC9C92E
:103FE000A77CDD7D247D9C7BCF7BDD7DFA7B247CE3
:103FF000544D52205345474100000000000000008E
:00000001FF0AF4
:103F50000011010D001C010B000C000F0017001DCB
:103F6000001D011A01FFFF12001900140012010BBD
:103F700000100010011300170018001701FFFF7A4E
:103F80003E1A32FFFF3224C82A0280010000097E57
:103F900023666F22D3D7AF32D6D73E1032DED7C9D1
:103FA000C9C9C93289DA7832D7D77932D8D73A89AC
:103FB000DAC3A27FC9C9C9C97EB7C8E5CDB67FE15A
:103FC0002318F4F3DBBE3A0CC8D3BF3A0DC8F64051
:103FD000D3BF010007AFD3BE0B78B120F8FBC9C92E
:103FE000A77CDD7D247D9C7BCF7BDD7DFA7B247CE3
:103FF000544D52205345474100000000000000008E
88
1C58 C5                 M 	PUSH	BC
1C59 21 00 00           M 	ld	HL,RobotnicShipAnim
1C5C                    M 	XREF	CreateState
1C5C CD 00 00           M 	CALL	CreateState
1C5F D1                 M 	POP	DE
1C60 38 00              M 	JR	C,AppendRightError_1988
1C62 21 4B D7           M 	ld	HL,StateRight
1C65 19                 M 	add	HL,DE
1C66 71                 M 	ld	(HL),C
1C67                    M               AppendRightError_1988
1C67                      		_YSpeed	3
1C67 FD 36 28 06        M 	ld	(IY+ItemYSpeedHi),lo(3*SpdFac)
1C6B FD 36 27 00        M 	ld	(IY+ItemYSpeedLo),0
1C6F                      

1C6F                      		_Goto	EndItemsCheck
1C6F 18 00              M 	JR	EndItemsCheck
1C71                      

1C71                      	;=== Re Entry (into the volcano) ===
1C71                      Reentry:
1C71                      		_AppendRight	ReentryAnim
1C71                    M 	XREF	AppendRight
1C71 CD 00 00           M 	CALL	AppendRight
1C74                    M 	bcs	AppendRightError_1992
1C74 38 00              M 	jr	C,AppendRightError_1992
1C76 C5                 M 	PUSH	BC
1C77 21 00 00           M 	ld	HL,ReentryAnim
1C7A                    M 	XREF	CreateState
1C7A CD 00 00           M 	CALL	CreateState
1C7D D1                 M 	POP	DE
1C7E 38 00              M 	JR	C,AppendRightError_1992
1C80 21 4B D7           M 	ld	HL,StateRight
1C83 19                 M 	add	HL,DE
1C84 71                 M 	ld	(HL),C
1C85                    M               AppendRightError_1992
1C85                      		_YSpeed	3
1C85 FD 36 28 06        M 	ld	(IY+ItemYSpeedHi),lo(3*SpdFac)
1C89 FD 36 27 00        M 	ld	(IY+ItemYSpeedLo),0
1C8D                      

1C8D                      EndItemsCheck:
1C8D FD 7E 05             	ld	A,(IY+ItemYHi)		;Check if hit stop point
1C90 FD BE 31              	cp	(IY+ItemParm0)
1C93                      	bne	EndItemsNext
1C93 20 00              M 	jr	NZ,EndItemsNext
1C95                      

1C95 FD 7E 04             	ld	A,(IY+ItemYLo)
1C98

(Source: RetroSpark)

Developer Messages

Each level in the game has a secret monitor with the text “見る” on it. Breaking this monitor will display a message, depending on the level:

Level 1: '08-XX-XX...'
Level 2: 'XX-31-XX...'
Level 3: 'XX-XX-71...'
Level 4: 'XX-XX-XX, SFX GET THAT???'

Combining all four messages results in a hint to play sound effects 00, 08, 03, 01, 07, 01 in the options menu. Do so, then break any of the hidden monitors to display another message:

TRY THESE SFX! 02-11-66, 09-01-68, 02-15-66, 04-25-57, * * * FIND THE REST ON YOUR OWN ***

These are the codes for huge sprites, the free movement mode, the level skip, and fast music, respectively.

There is also an additional message, not connected to the others. Play sound effects 00, 03, 01, 08, 09, 02 in the options menu. Breaking any of the hidden monitors will now display this message:

HAPPY BIRTHDAY, BLL, 03-18-92

(Source: Hillbert)