Super Mario Bros Co-Op hacks by NesDraug

[NesDraug]

What's even more frustrating with the twoplayerhack is that A+start does not work so if you get a game over you cant just start at the world you died.

Also power-up jumps are not possible. (Grab a mushroom and jump again i the air)

[NesDraug]

Change all "lives,X" instructions to just "lives".

There aren't any "lives," instructions.

These are all mentions of "lives" in smb
   Line 238: NumberofLives         = $075a ;used by current player
   Line 249: OffScr_NumberofLives  = $0761 ;used by offscreen player
   Line 1272:                lda #$ff                   ;remove onscreen player's lives
   Line 1273:                sta NumberofLives
   Line 1319:               inc NumberofLives            ;give player one extra life (1-up)
   Line 1423:       sta PlayerStatus         ;the intermediate lives display
   Line 1569:                lda DisableIntermediate      ;if this flag is set, skip intermediate lives display
   Line 1572:                lda #$01                     ;lives display, then output lives display to buffer
   Line 1572:                lda #$01                     ;lives display, then output lives display to buffer
   Line 1665: WorldLivesDisplay:
   Line 1667:   .db $29, $24, $24, $24, $24 ; lives display
   Line 1668:   .db $21, $4b, $09, $20, $18 ; "WORLD  - " used on lives display
   Line 1671:   .db $23, $dc, $01, $ba ; attribute table data for crown if more than 9 lives
   Line 1708:   .db WorldLivesDisplay-GameText, WorldLivesDisplay-GameText
   Line 1708:   .db WorldLivesDisplay-GameText, WorldLivesDisplay-GameText
   Line 1717:                cpy #$04                 ;if set to do top status bar or world/lives display,
   Line 1740:                dex                      ;are we printing the world/lives display?
   Line 1742:                lda NumberofLives        ;otherwise, check number of lives
   Line 1742:                lda NumberofLives        ;otherwise, check number of lives
   Line 1745:                cmp #10                  ;more than 9 lives?
   Line 1746:                bcc PutLives
   Line 1749:                sty VRAM_Buffer1+7       ;the number of lives exceeds 19
   Line 1750: PutLives:      sta VRAM_Buffer1+8
   Line 2741:       sta NumberofLives           ;give each player three lives
   Line 2741:       sta NumberofLives           ;give each player three lives
   Line 2742:       sta OffScr_NumberofLives
   Line 2752:              sta DisableIntermediate   ;clear skip lives display flag
   Line 2931:              dec NumberofLives        ;take one life from player
   Line 2932:              bpl StillInGame          ;if player still has lives, branch
   Line 3027:            lda OffScr_NumberofLives  ;does offscreen player have any lives left?
   Line 3027:            lda OffScr_NumberofLives  ;does offscreen player have any lives left?
   Line 5533:             inc DisableIntermediate   ;set flag to skip world and lives display
   Line 7115:       inc NumberofLives      ;give the player an extra life
   Line 14561:           sta $02,x                      ;appears on world/lives display

[Cyneprepou4uk]

I was talking about addressing modes for instructions, not about some names of variables in some disassembly.

[NesDraug]

Change all "lives,X" instructions to just "lives".

I don't know how to do that.

[Cyneprepou4uk]

Don't bother, it was a bit more complicated than that.

Patch this over 2p hack.
Super Mario Bros. (Two Players Hack) sharing lives.ips

[Midnight Metronome]

Don't bother, it was a bit more complicated than that.

Patch this over 2p hack.
Super Mario Bros. (Two Players Hack) sharing lives.ips

Cyneprepou4uk, you are the GOD of ASM. Thank you!

[pleasejust]

Since live are shared, how can I increase the lives to 6? Any kind of hex edit?

[NesDraug]

Don't bother, it was a bit more complicated than that.

Patch this over 2p hack.
Super Mario Bros. (Two Players Hack) sharing lives.ips

Thank you very much! I tried but couldn't figure it out.

Since live are shared, how can I increase the lives to 6? Any kind of hex edit?

Yes. At this address.

8e77 - Change Mario's starting lives. 02 is default (3 lives). 7F is max (128 lives).

8053 - Change Luigi's starting lives.


... I guess the Luigi adress is not in use any more.

[NesDraug]

Thank you very much! I tried but couldn't figure it out.

Yes. At this address.

8e77 - Change Mario's starting lives. 02 is default (3 lives). 7F is max (128 lives).

8053 - Change Luigi's starting lives.


... I guess the Luigi adress is not in use any more.

The patch made by Cyneprepou4uk is functional with the original SMB Twoplayerhack but unfortenately not compatible with my Co-Op Coin Challenge hack. I think it's because the new boss fight data is stored in the same place!

[NesDraug]

[pleasejust]

Thank you very much! I tried but couldn't figure it out.

Yes. At this address.

8e77 - Change Mario's starting lives. 02 is default (3 lives). 7F is max (128 lives).

8053 - Change Luigi's starting lives.


... I guess the Luigi adress is not in use any more.

I used hex fiend and did a "jump to offset". There is no 8e77. And if 02 = 3 and 7F - 128.... what is 6?..... 02 doesn't even equate to 3 in hex.

[NesDraug]

I used hex fiend and did a "jump to offset". There is no 8e77. And if 02 = 3 and 7F - 128.... what is 6?..... 02 doesn't even equate to 3 in hex.

In the twoplayer hack, sure there is. 8e77 is an adress. Well perhaps you need to write it 008e77 im not at my computer right now.

I usually just use FCEUX emulator's hex editor. Bring up the hex editor, make sure you're editing the ROM not the NES MEMORY. Ctrl+G and enter 8e77 and that will bring you to Mario's starting lives. 02= three lives. Because 01 = two lives and 00 = last life.

05 = is six lives.

[Cyneprepou4uk]

not compatible with my Co-Op Coin Challenge hack

There are only a few changes in my patch. You can figure out how to move that subroutine.

[NesDraug]

I posted Cyneprepou4uk's patch and added in a few edits of my own.

- Start with 15 Lives
- Both players share lives and collect 1ups (cred to Cyneprepou4uk)
- All hidden 1-ups will always spawn
- In air shell kicks = 1up

https://www.romhacking.net/hacks/7166/

I'm however afraid my hacking skills are insufficient to move the code around to enable this in Co-op Coin Challenge.

[Cyneprepou4uk]

[NesDraug]

Yes. I know where the code is. It's just that I don't know how to move code at all. It's just random numbers to me.

[NesDraug]

Are you saying B0 F5 is the value that points the code to the adress: f5c0?

I need to move it to f600

[Cyneprepou4uk]

You've been hacking for at least 4 years now, and you still don't know the basics. That's kinda weak.

20 B0 F5 is JSR $F5B0. If ROM 0xF5C0 = CPU $F5B0, then ROM 0xF600 = CPU $????

Do the math.

[NesDraug]

You've been hacking for at least 4 years now, and you still don't know the basics. That's kinda weak.

20 B0 F5 is JSR $F5B0. If ROM 0xF5C0 = CPU $F5B0, then ROM 0xF600 = CPU $????

Do the math.

That is true. I've done basic hex stuff since 2019 and only recently looked into asm. Also a lot of focus on music. Stuff takes time when you can only spend so much time in your hobbies.

Well. Thank you for helping the weak.   I'll look into it.

[pleasejust]

Is there a way to make it so the single player game is a normal single player game with 3 lives, but only co-op has a higher amount that is shared?  or is that too much work? I like 6 shared lives because that it's the # of lives Luigi would have that is added to Mario's for a total of 6. 15 seems kind of arbitrary and too high.