Adding Invincibility Stars to Super Sonic

11fc 0001 fe2d or 31fc 0001 fe2d (don't know if this'll work).

 

First,sorry to answer to an old post,but he said that he still need it.

Try with "move.b #$35,($FFFFD200).w" (11 fc 00 35 2d 00 in hex)The Super Sonic code is located at 0x1AB38(but don?t touch anything before 0x1AB4E,or the code will execute each time that you jump) use some jmps to add it.

 

move.b #$35,($FFFFB200).w

Also, 11 FC 00 35 B2 00

 

Is D200,for sonic 1 and 2

Code (Text):

1. loc_12A5C: ?
2.  ?addq.w    #1,(a2)
3.  ?tst.b ($FFFFFE19).w
4.  ?bne.s locret_12AA4
5.  ?bset  #1,$2B(a1)
6.  ?move.w    #$4B0,$32(a1)
7.  ?tst.b ($FFFFF7AA).w
8.  ?bne.s loc_12A88
9.  ?cmpi.b    #$C,$28(a1)
10.  ?bls.s loc_12A88
11.  ?move.w    #$97,d0
12.  ?jsr   (sub_135E).l
13.  
14. loc_12A88: ? ?
15.  ?tst.b $3F(a0)
16.  ?bne.s loc_12A9A
17.  ?--> move.b    #$35,($FFFFD200).w <--
18.  ?move.w    a1,($FFFFD23E).w
19.  ?rts

Also,try to search 11 FC 00 35 B2 00 in the rom =P

 

You can get an effect similar to what you want by just using debug. Turn into Super Sonic, then place a teleport monitor and break it. Sonic's Super powers will then transfer to Tails, so Tails will be speedy and have invincibility stars round him. Sonic will remain yellow, but one hit will cause Sonic to lose his rings and turn blue again.
I think if you then break another teleport monitor Sonic will regain his Super powers, and also have the stars!

 

I am fairly sure that he already knows this, he wan't to have the effect without debug by hacking the game.

 

Add this somewhere in the Super Sonic code:

11 FC 00 35 D2 00
33 FC B0 00 00 00 D2 3E


And add this at offset 1D9E4 in the S2 ROM:
33 7C B0 00 00 3E


And it will work!

 

A left over from Sonic 1. Well Naka probably wanted to keep track of the monitor powerups, like if he was adding more powerups o.o;;

It works with B200 too you know. But you are right. Better use the address Naka decided to use

 

Remember that you need to use a jump instead of directly add bytes to the rom.Better use JSR as Quickman said so, in hex is 4e b9 xx xx xx xx where the "x" are the offset that you want to jump.Put the offset where you rom end.Normally,it will be 4e b9 00 10 00 00.Now,put that in 0x1ab4e,but first copy the bytes that you are going to replace.Then go to the end of the rom,and add there the bytes that you copied,and add 33 FC B0 00 00 00 D2 3E ,and because we use jsr,now add a rts (4e 75) to return, and in 1d9e4 add 33 7C B0 00 00 3E,as LOst said.This should work.

You can do it with jmps too,but by this way is more small.

(Edited)

 

I prefer using JSR (4EB9) because that lets me use an RTS command which takes up less space overall.

 

True

 

That?s rigth.At the first I believed that the jump "eat" part from the next instruction,but looks like is 6 bytes too (11 fc 00 01 f6 5f) so in this case is better use a JSR.