Class: Amaterasu::GameBoy::Oam

Inherits:

Ram

• Object
• Ram
• Amaterasu::GameBoy::Oam

Defined in:

lib/amaterasu/game_boy/oam.rb,
lib/amaterasu/game_boy/oam/sprite.rb

Overview

Models the OAM (Object Attribute Memory) from the DMG Game Boy.

Defined Under Namespace

Classes: Sprite

Constant Summary

START_ADDRESS =

0xFE00

END_ADDRESS =

0xFE9F

SPRITE_ENTRIES =

40

SIZE =

> 160 bytes

(END_ADDRESS - START_ADDRESS) + 1

Instance Attribute Summary

Attributes inherited from Ram

#size

Instance Method Summary

• #each_sprite ⇒ Object
• #initialize ⇒ Oam constructor

  A new instance of Oam.

• #sprite(index) ⇒ Object

Methods inherited from Ram

#disk_size, #read_backup, #read_byte, #restore_data, #save_data, #wipe_backup, #wipe_data, #write_byte

Constructor Details

#initialize ⇒ Oam

Returns a new instance of Oam.

# File 'lib/amaterasu/game_boy/oam.rb', line 12

def initialize
  super(size: SIZE, offset: START_ADDRESS)

  @sprites = Array.new(SPRITE_ENTRIES) do |sprite_index|
    Sprite.new(oam_data: @data, index: sprite_index)
  end
end

Instance Method Details

#each_sprite ⇒ Object

# File 'lib/amaterasu/game_boy/oam.rb', line 24

def each_sprite(&)
  @sprites.each(&)
end

#sprite(index) ⇒ Object

# File 'lib/amaterasu/game_boy/oam.rb', line 20

def sprite(index)
  @sprites[index]
end