Visual Memory Unit

VMU/VMS Maple Peripheral API. More...

Modules
	Clock Function
	API for features of the Clock Maple Function.
	Header Package
	API for Managing VMU File Headers.
	LCD Function
	API for features of the LCD Maple Function.
	Memory Card Function
	API for features of the Memory Card Maple Function.
	Settings
	Customizable configuration data.

Files
file	vmu.h
	Definitions for using the VMU device.
file	vmu_fb.h
	VMU framebuffer.

Detailed Description

VMU/VMS Maple Peripheral API.

The Sega Dreamcast's Visual Memory Unit (VMU) is an 8-Bit gaming device which, when plugged into the controller, communicates with the Dreamcast as a Maple peripheral.

        Visual Memory Unit
         _________________
        /                 \
        |   @ Dreamcast   |
        |   ___________   |                  
        |  |           |  |                 
        |  |           |  |                 
        |  |           |  |            
        |  |           |  |  
Sleep   |  |___________|  |   Mode 
  ------|---------\    /--|-------  
        |   |¯|   *   *   |
     /--|-|¯   ¯| /¯\ /¯\_|____     
    /   |  ¯|_|¯  \_/ \_/ |    \
   |    |          |      |    B
 D-pad  \__________|______/  
                   |
                   A

As a Maple peripheral, the VMU implements the following functions:

• MEMCARD: Storage device used for saving and loading game files.
• LCD: Secondary LCD display on which additional information may be presented to the player.
• CLOCK: A device which maintains the current date and time, provides at least one buzzer for playing tones, and also has buttons used for input.

Each Maple function has a corresponding set of C functions providing a high-level API around its functionality.