Class: Amaterasu::GameBoy::Oam

Inherits:
Ram
  • Object
show all
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 collapse

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 collapse

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.



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# 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 



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

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

#sprite(index) ⇒ Object 



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

def sprite(index)
  @sprites[index]
end