Nintendo Game Boy Link Cable Manuel du propriétaire

DMG-06-4216-001-B

Released 12/03/1999

PROGRAMMING MANUAL

Version 1.1

“Confidential”

This document contains confidential and proprietary information of

Nintendo and is also protected under the copyright laws of the United

States and foreign countries. No part of this document may be released,

distributed, transmitted or reproduced in any form or by any electronic

or mechanical means, including information storage and retrieval

systems, without permission in writing from Nintendo.

1999, 2000 Nintendo of America Inc.

TM and are trademarks of Nintendo

Introduction

INTRODUCTION

This manual is a combination and reorganization of the information presented in the Game Boy Development

Manual, revision G, and the Game Boy Color User's Guide, version 1.3. In addition, it incorporates all information

related to Game Boy programming, including programming for Super Game Boy and the Game Boy Pocket

Printer.

The abbreviations used in this manual represent the following:

DMG: Game Boy (monochrome), introduced on April 21, 1989

MGB: Game Boy Pocket (monochrome), introduced on July 21, 1996

MGL: Game Boy Light (monochrome), introduced on April 14, 1998

CGB: Game Boy Color (color), introduced on October 21, 1998

Note: Where it is not necessary to distinguish between the different monochrome

models, DMG is used to refer to both monochrome models, and CGB is used to

denote the Color Game Boy.Only whereit is necessaryto distinguishbetween

the monochrome models is MGB used to denote Game Boy and MGL used to

denote Game Boy Light.

SGB: Super Game Boy, introduced on June 14, 1994

SGB2: Super Game Boy 2, introduced on January 30, 1998

Note: SGB is used to denote both SGB and SGB2 when no distinction is necessary.

SGB2 is used only in cases where distinction is necessary.

Game Boy Programming Manual

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Preface: To Publishers

PREFACE: TO PUBLISHERS

NINTENDO GAME BOY COLOR SOFTWARE PRE-APPROVAL

REQUIREMENTS

Prior to submitting your CGB software to Lot Check for approval, it is required that you submit it to the Licensee

Product Support Group for pre-approval. To assist us with the evaluation of your CGB software and/or product

proposal(s), please refer to the following requirements when submitting materials* for approval.

* Please do not send original artwork or materials, as they will not be returned.

CGB software and/or product proposals are evaluated based on the following criteria:

•Use of Color

To ensure that the expectations of the Game Boy Color consumer are met, Mario Club will evaluate the use

of color in all CGB games (dual or dedicated) using the following criteria:

◊Differentiation - If a game is to be considered CGB-compatible, then it must appear significantly more

colorful than a monochrome Game Boy game when “colorized” by the CGB hardware. The principal

measure of this is the number of colors in the background (BG) and the number of colors in the objects

(OBJ).

◊Simultaneous Colors - Because CGB hardware automatically “colorizes” monochrome games with up

to four colors in the BG palette and up to six colors for two OBJ palettes (three colors per palette), a

game typically must display more colors than this automatic “colorization” to be considered a CGB

game.

◊Appropriate use of Color - Objects in the game that are based on reality (trees, rocks, animals, and

so on) should be a color that we would normally associate with them. For fictional objects, colors

should be chosen to show appropriate detail and, when needed, to differentiate unlike objects.

◊Variety of Colors - The CGB is capable of producing a wide range of colors (32,768 to be exact --

albeit not all at the same time). A CGB game should use this capability of the hardware to yield

distinctly different colors for objects, characters, areas, and so on.

◊Contrast & Saturation - Two of the elements that make a game look colorful are high contrast and

“saturated” or vibrant colors. Pastel colors on a white background will not seem nearly as colorful as

the same colors on a dark background. Not every game can use a dark background, but the intensity

of the colors should still be maximized as much as possible.

Please detail or demonstrate how your game will utilize color capabilities of the CGB. Use whatever means

will best allow you to do so, such as artists renderings, programmed demos, ROM images, written

descriptions, and so on.

Game Boy Programming Manual

•

Game Concept Content

We do not require an explanation of, or evaluate game concept content for original CGB titles. However, if

you are planning to “colorize” a previously released monochrome game we require that it include game-play

enhancements (beyond simply adding color) to differentiate it from its monochrome counterpart. Such

game-play enhancements may include, but are not limited to: additional stages, levels, or areas; new

characters; additional items; game-play based on color; and so on. These enhancements must be readily

apparent to players familiar with the original monochrome game.

Please submit a written proposal of the enhancements to us for pre-approval. Use whatever additional

means that will best allow you to communicate the game-play enhancements, such as storyboards,

treatments, videotapes, programmed demos, and so on.

•Interim ROM Submissions

We require at least one interim ROM submission to Mario Club (at approximately 50% completion) for

preliminary review of the use of color in every CGB game. By reviewing the interim ROM and providing you

with feedback in the early stages, we also help ensure that your projects stay on schedule. Final pre-

approval is based on Mario Club’s evaluation of a ROM near completion of game development.

If you wish to arrange electronic transfer of the ROMimage, please contact Terral Dunn in our Testing

and Engineering department at (425) 861-2670 or by e-mail at “Terraldu@noa.nintendo.com”. Please notify

him when you have made an electronic submission for our review.

•

Proposed Developer

Please supply us with the name, addressand phone number of the proposed developer. If the developer is

not an Authorized Nintendo CGB Developer, please contact Melody Morgan at “melomo01@noa.nintendo.com”or

425-861-2618, and she will provide you with the application information.

•Schedule Information

Please provide us with an estimated product schedule, including interim ROM submission(s), final Mario

Club submission, submission of the master ROM to Lot Check, and the release date.

•Game Pak Configuration & Game Type

Please provide us with the estimated Game Pak size in Megabits (Mb) and the RAM size if internal memory

is to be used to save game information. Also state whether the game will be compatible with the

monochrome Game Boy hardware or if it is dedicated to CGB hardware. For the current Game Pak prices

and configurations available, please contact Nintendo’s Licensing Department.

You will be contacted with the evaluation results when the Licensee Product Support Group has completed its

evaluation of your ROM or concept submission.

Table of Contents

Page Number

Introduction.......................................................................................... 3

Preface: To Publishers......................................................................... 5

Chapter 1 System................................................................................. 9

Chapter 2 Display Functions............................................................. 47

Chapter 3 Sound Functions............................................................... 77

Chapter 4 CPU Instruction Set .......................................................... 93

Chapter 5 Miscellaneous General Information............................... 125

Chapter 6 The Super Game Boy System........................................ 137

Chapter 7 Super Game Boy Sound................................................. 187

Chapter 8 Game Boy Memory Controllers(MBC) ........................... 215

Chapter 9 Pocket Printer.................................................................. 235

Appendix 1 Programming Cautions................................................ 253

Appendix 2 Register and Instruction Set Summaries.................... 267

Appendix 3 Software Submission Requirements .......................... 285

Game Boy Programming Manual

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Chapter 1: System

CHAPTER 1: SYSTEM..............................................................11

Revision History…………………………………………………………….10

1. GENERAL SYSTEM ......................................................................11

1.1 System Overview.....................................................................................11

1.2 Game Boy Block Diagram.......................................................................13

1.3 Memory Configuration.............................................................................14

1.4 Memory Map.............................................................................................15

1.5 Feature Comparison................................................................................16

1.6 Register Comparison...............................................................................17

2. CPU................................................................................................18

2.1 Overview of CPU Features......................................................................18

2.2 CPU Block Diagram.................................................................................20

2.3 Description of CPU Functions................................................................22

2.4 CPU Functions (Common to DMG/CGB

➀

➀➀

➀

).............................................24

2.5 CPU Functions (Common to DMG/CBG

➁

➁➁

➁

).............................................28

2.6 CPU Functions (CGB only)......................................................................34

Game Boy Programming Manual

Revision History

Date Section Description

12/3/99 2.6.3 Revision of description for Infrared Communication

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