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Sonic the Hedgehog CD/MMD Tweaking

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Revision as of 08:40, 7 August 2008 by Tails92 (talk | contribs) (Tweakable locations in a Sonic CD level MMD)
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European Sonic CD

Here are some locations in an level MMD which contain tweakable code (in 68k assembly).

Number of rings limit: (0xAEFA)
move.w (word_FF1512).l,d1 ; Move number of rings into d1
cmpi.w #$3E8,d1  ; Compare $3E8 (1000) with d1 (number of rings)
bcs.s loc_20AF10  ; If the number of rings is < 1000, branch
move.w #$3E7,d1  ; Move $3E7 (999) into d1
move.w d1,(word_FF1512).l ; Move d1 back to the address where the number of rings is at

Lowest number of rings required to access the special stage: (0xD50C)
cmpi.w #$32,(word_FF1512).l ; Compare 50 with the number of rings
bcc.s loc_20D51C  ; If number of rings >= 50, allow entrance to the special stage.
jmp sub_20788C  ; Otherwise jump here

Number of rings you get when you break the ring monitor: (0xA88E)
addi.w #$A,(word_FF1512).l ; Add 10 to the current number of rings

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