https://github.com/zackthehuman/mm3info

FCEUX script for extracting game information from Mega Man 3
https://github.com/zackthehuman/mm3info

Last synced: 17 days ago
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FCEUX script for extracting game information from Mega Man 3

• Host: GitHub
• URL: https://github.com/zackthehuman/mm3info
• Owner: zackthehuman
• Created: 2011-06-19T03:33:50.000Z (over 13 years ago)
• Default Branch: master
• Last Pushed: 2013-06-24T06:58:50.000Z (over 11 years ago)
• Last Synced: 2024-10-03T11:46:12.884Z (about 1 month ago)
• Language: Lua
• Homepage:
• Size: 102 KB
• Stars: 3
• Watchers: 2
• Forks: 1
• Open Issues: 0
• Metadata Files:
  • Readme: README

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README

        
= About =

mm3info is an FCEUX script for extracting game information from Mega Man 3.

This script was inspired by the "Mega Man 2 LASER EYES" script by miau.

The purpose of this script is to be an aid in understanding the mechanics of 

the NES game Mega Man 3. So far this script:

	- Allows the display of object information, such as ID and Position

	- Allows you to place Rock anywhere on screen by middle-clicking

= Todo =

	- Display object names

	- Display object hit boxes

= Mega Man 3 RAM Map =

I am still studying the RAM is used by the game. Below are my findings up to

this point in time.

$00A2: Rock's health

$0093: Object logic delay; if set to value other than 1, causes a counter 

	at 0081) to count down from the value at 0081 to 0 before advancing the

	logic one frame

$0200-$02FF: Sprite data for DMA

$0300-$05FF: Game object data

	$0300-$031F: State index?

	$0320-$033F: Type

	$0340-$035F: Fractional X position

	$0360-$037F: Whole X position

	$0380-$039F: Screen number (which screen the object is in)

	$03A0-$03BF: Fractional Y position

	$03C0-$03DF: Whole Y position

	$03E0-$03FF: Mystery #1 (if set to a non-zero value then object does not spawn or will disappear if already spawned)

	$0400-$041F: Fractional X speed

	$0420-$043F: Whole X speed

	$0440-$045F: Fractional Y speed

	$0460-$047F: Whole Y speed

	$0480-$049F: Shield status. Shots bounce off when value = A1, but takes damage when value = C1

	$04A0-$04BF: Direction

	$04C0-$04DF: Mystery #2 / object number? on-screen number?

	$04E0-$04FF: Hit points

	$0500-$051F: Timer/counter 1

	$0520-$053F: Timer/counter 2

	$0540-$055F: Mystery #3 / seems like its not used

	$0560-$057F: Value #1 (Spark man's raising platforms use this as their "return to" Y value)

	$0580-$059F: Sprite direction? D0 = left, 90 = right

	$05A0-$05BF: Sprite index (within animation)? (can affect behavior if animation doesn't change)

	$05C0-$05DF: Animation sequence number (can affect behavior if animation doesn't change)

	$05E0-$05FF: Animation counter or something (can affect behavior if animation doesn't change)

$0600-$XXXX: Tile data starts here