Mail has been fixed; you should now be able to confirm your e-mail address, watch pages, and the like.
Please report any issues on Discord.

Sonic Spinball (Sega Master System)

From The Cutting Room Floor
Jump to navigation Jump to search

Title Screen

Sonic 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

SourceIcon.png This game has uncompiled source code.
DevTextIcon.png This game has hidden development-related text.
DebugIcon.png This game has debugging material.
LevelSelectIcon.png This game has a hidden level select.

A downsized port of Sonic Spinball that appears to be have been rushed out the door.

Level Skip

Play sound effects 0, 2, 1, 5, 6, 6 in the sound test, then pause during gameplay and press Down.

Free-Movement Mode

In the Options menu, play sound effects 0, 9, 0, 1, 6, 8 in the Sound Test (the screen will shake if you did it right). Start the game, then pause and press 2.

Build Date

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

A build date is present at 0x4C8D, and can be displayed in the Options menu by playing sound effects 0, 5, 0, 3, 6, 0 in the Sound Test.

Uncompiled Code

At 1EFAE, there's a fragment of code, likely from a printout of the code.

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                      		_Goto	EndItemsCheck
1C6F 18 00              M 	JR	EndItemsCheck

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

(Source: RetroSpark)