[NES] Baby Boomers (USA)

[Dteyn]

Infinite Lives
VGKTZXSX

Invincible (bombs, holes, and running out of milk can still kill you)
ILXVPSAV

Completely Invulnerable (will not die even if you fall in a hole)
ATVVASSZ

Infinite Milk
SZUVZKVK

Start with more milk
GUOIKYGP

Twice as much milk on pickup
GPNNSUZA



I gotta admit, I can't believe I decided to make codes for this game. I was trying out my new light zapper mod and just had to. So in case anyone else ever has the desire to play this game, here are some codes for ya! Cheers!


Code development notes (for anyone interested):
Spoiler Alert! Click to view...

Infinite Lives
VGKTZXSX

Lives remaining are stored at $0503:

>01:E242:CE 03 05  DEC $0503 = #$03
 01:E245:F0 07     BEQ $E24E

Change DEC into LDA:
>01:E242:AD 03 05  LDA $0503 = #$03

E242:AD:CE = VGKTZXSX

Invincible (bombs, holes, and running out of milk can still kill you)
ILXVPSAV

This is a simple variation on the 'Cannot die' code.

Instead of changing the main death routine to an RTS, this code
changes the address of the jump to that routine, so it points
to an RTS.

The result is that the player can still die if falling in holes,
or if getting hit by a bomb.


>01:E528:20 68 E5  JSR $E568
 01:E52B:4C 2E E5  JMP $E52E
 01:E52E:AD AB 05  LDA $05AB = #$00
 01:E531:C9 02     CMP #$02
 01:E533:D0 08     BNE $E53D
 01:E535:CE AC 05  DEC $05AC = #$FF
 01:E538:D0 03     BNE $E53D
 01:E53A:EE AB 05  INC $05AB = #$00
 01:E53D:60        RTS -----------------------------------------


Change JSR $E568 to JSR $E53D:

>01:E528:20 3D E5  JSR $E53D


E529:3D:68 = ILXVPSAV

Completely invulnerable (will not die even if you fall in a hole)
ATVVASSZ

I noticed that $0565 gets set to FF when the player dies.

I traced the code back and found that the player death routine
seems to initiate at $E568.

Replacing with a RTS ends the routine before it begins.

>01:E568:AD D9 05  LDA $05D9 = #$00
 01:E56B:F0 05     BEQ $E572
 01:E56D:A9 00     LDA #$00
 01:E56F:8D D8 05  STA $05D8 = #$FF
 01:E572:20 02 DD  JSR $DD02
 01:E575:A9 FF     LDA #$FF
 01:E577:8D 65 05  STA $0565 = #$00


Change LDA to RTS:

>01:E568:60        RTS -----------------------------------------


E568:60:AD = ATVVASSZ

Infinite milk
SZUVZKVK

Milk remaining is stored at $0507.
Code at $E43A decrements the value:

>01:E43A:CE 07 05  DEC $0507 = #$14
 01:E43D:D0 03     BNE $E442

Change DEC to LDA:
>01:E43A:CE 07 05  DEC $0507 = #$14


E43A:AD:CE = SZUVZKVK

Start with more milk
GUOIKYGP

Milk remaining is stored at $0507.
Value is initialized at $DF93:

 01:DF93:A9 14     LDA #$14
>01:DF95:8D 07 05  STA $0507 = #$0E

Change LDA #$14 into LDA #$34 for more milk at start of level.
 01:DF93:A9 34     LDA #$34


DF94:34:14 = GUOIKYGP

Twice as much milk on pickup
GPNNSUZA

Milk remaining is stored at $0507.
Code at $FB78-FB7E runs when milk is picked up:

 01:FB78:AD 07 05  LDA $0507 = #$33
 01:FB7B:18        CLC
 01:FB7C:69 0A     ADC #$0A
>01:FB7E:8D 07 05  STA $0507 = #$33

Change ADC #$0A to ADC #$14 for more milk on pickup:

 01:FB7C:69 14     ADC #$14


FB7D:14:0A = GPNNSUZA