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Game Resources / NES / Duck Tales

Lua script made by Pasky13, feos and MESHUGGAH: http://pastebin.com/m94xecjR

Y sub pixels

Works the same way as in Chip 'n Dale Rescue Rangers but [current value + 51] mod 256 instead of [current value + 85] mod 256.

RNG roll

On every in-game frame when user has control (so transitions and lag frames don't roll RNG). One could remove a lag frame by removing the direction frame to get a different RNG.
A:00 X:06 Y:01 S:BF P:nvUBdIZc $DC23:20 E6 C2  JSR $C2E6 
A:00 X:06 Y:01 S:BD P:nvUBdIZc   $C2E6:A2 00     LDX #$00 
A:00 X:00 Y:01 S:BD P:nvUBdIZc   $C2E8:A0 04     LDY #$04 
A:00 X:00 Y:04 S:BD P:nvUBdIzc   $C2EA:B5 C0     LDA $C0,X @ $00C0 = #$85 -- RNG 1
A:85 X:00 Y:04 S:BD P:NvUBdIzc   $C2EC:29 02     AND #$02 
A:00 X:00 Y:04 S:BD P:nvUBdIZc   $C2EE:85 00     STA $0000 = #$8D 
A:00 X:00 Y:04 S:BD P:nvUBdIZc   $C2F0:B5 C1     LDA $C1,X @ $00C1 = #$1E -- RNG 2
A:1E X:00 Y:04 S:BD P:nvUBdIzc   $C2F2:29 02     AND #$02 
A:02 X:00 Y:04 S:BD P:nvUBdIzc   $C2F4:45 00     EOR $0000 = #$00 
A:02 X:00 Y:04 S:BD P:nvUBdIzc   $C2F6:18        CLC 
A:02 X:00 Y:04 S:BD P:nvUBdIzc   $C2F7:F0 01     BEQ $C2FA 
A:02 X:00 Y:04 S:BD P:nvUBdIzc   $C2F9:38        SEC 
A:02 X:00 Y:04 S:BD P:nvUBdIzC   $C2FA:76 C0     ROR $C0,X @ $00C0 = #$85 
A:02 X:00 Y:04 S:BD P:NvUBdIzC   $C2FC:E8        INX 
A:02 X:01 Y:04 S:BD P:nvUBdIzC   $C2FD:88        DEY 
A:02 X:01 Y:03 S:BD P:nvUBdIzC   $C2FE:D0 FA     BNE $C2FA 
A:02 X:01 Y:03 S:BD P:nvUBdIzC   $C2FA:76 C0     ROR $C0,X @ $00C1 = #$1E 
A:02 X:01 Y:03 S:BD P:NvUBdIzc   $C2FC:E8        INX 
A:02 X:02 Y:03 S:BD P:nvUBdIzc   $C2FD:88        DEY 
A:02 X:02 Y:02 S:BD P:nvUBdIzc   $C2FE:D0 FA     BNE $C2FA 
A:02 X:02 Y:02 S:BD P:nvUBdIzc   $C2FA:76 C0     ROR $C0,X @ $00C2 = #$14 -- RNG 3
A:02 X:02 Y:02 S:BD P:nvUBdIzc   $C2FC:E8        INX 
A:02 X:03 Y:02 S:BD P:nvUBdIzc   $C2FD:88        DEY 
A:02 X:03 Y:01 S:BD P:nvUBdIzc   $C2FE:D0 FA     BNE $C2FA 
A:02 X:03 Y:01 S:BD P:nvUBdIzc   $C2FA:76 C0     ROR $C0,X @ $00C3 = #$28 -- RNG 4
A:02 X:03 Y:01 S:BD P:nvUBdIzc   $C2FC:E8        INX 
A:02 X:04 Y:01 S:BD P:nvUBdIzc   $C2FD:88        DEY 
A:02 X:04 Y:00 S:BD P:nvUBdIZc   $C2FE:D0 FA     BNE $C2FA 
A:02 X:04 Y:00 S:BD P:nvUBdIZc   $C300:60        RTS (from $C2E6) -----------------

RNG on kill

Only tested on gorilla so far
$8945:20 DA 89  JSR $89DA
 $89DA:86 00     STX $0000 = #$09
 $89DC:A5 C0     LDA $00C0 = #$83 -- RNG 1
 $89DE:65 C1     ADC $00C1 = #$BA
 $89E0:85 C1     STA $00C1 = #$BA -- RNG 2
 $89E2:29 03     AND #$03
 $89E4:D0 28     BNE $8A0E
 $8A0E:A6 00     LDX $0000 = #$09

Boss 2 RNG

1st action depends on the last frame of the smoke puff before she transforms into a bird. Her "pattern" can be seen at 0x6BF (state if I'm correct). 1st action list:
A:00 X:0F Y:01 S:BB P:nvUbdIZC     $A3A6:A5 C0     LDA $00C0 = #$5E -- RNG 1
A:5E X:0F Y:01 S:BB P:nvUbdIzC     $A3A8:65 C2     ADC $00C2 = #$03 -- RNG 3
A:62 X:0F Y:01 S:BB P:nvUbdIzc     $A3AA:85 C1     STA $00C1 = #$BE -- RNG 2
A:62 X:0F Y:01 S:BB P:nvUbdIzc     $A3AC:29 03     AND #$03
A:02 X:0F Y:01 S:BB P:nvUbdIzc     $A3AE:A8        TAY
A:02 X:0F Y:02 S:BB P:nvUbdIzc     $A3AF:B9 8F A5  LDA $A58F,Y @ $A591 = #$88
A:88 X:0F Y:02 S:BB P:NvUbdIzc     $A3B2:9D B0 06  STA $06B0,X @ $06BF = #$3C
A:88 X:0F Y:02 S:BB P:NvUbdIzc     $A3B5:60        RTS ------------------------------

Boss 3 weirdness

For whatever reason, the boss can have a different Y speed before each transforming to the rock. The best situation is the 159.000 peak jump on every iteration. Player's x subpos can manipulate it, something should be too. Boss 3 also has "inconsistent" X speed, so sometimes a rolling can be 1 frame longer.


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GameResources/NES/DuckTales last edited by MESHUGGAH on 2013-08-02 09:06:33
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