Nintendo DMG-01 - Game Boy Console User Manual

Sources by: Pan of Anthrox, GABY, Marat Fayzullin,
Pascal Felber, Paul Robson, Martin Korth, kOOPa, Bowser
Contents:
Assembly Language Commands, Timings and Opcodes, and
everything you always wanted to know about GB but were
afraid to ask.
THIS DOCUMENT IS PRINTED ON DIN A5 SIZE PAPER
(148mm x 210mm)!
Note: Game Boy
TM
, Game Boy Pocket
TM
, Super Game Boy
TM
and Game
Boy Color
TM
are registered trademarks of Nintendo CO., LTD.
© 1989 to 1999 by Nintendo CO., LTD.
Version: 1.01 by DP
Game Boy
TM
CPU Manual

Nintendo DMG-01 - Game Boy Console Specifications

General

Manufacturer	Nintendo
Model	DMG-01
Type	Handheld Game Console
RAM	8 KB
Video RAM	8 KB
Weight	220 g (7.8 oz) (without batteries)
Media	Game Boy cartridges
CPU	Sharp LR35902
Display	2.6 inches, 160 x 144 pixels
Colors	4 shades of gray
Sound	4-channel stereo
Power	4 AA batteries
Battery Life	10-30 hours
Dimensions	148 mm x 90 mm x 32 mm (5.8 in x 3.5 in x 1.3 in)
Connectivity	Link Cable

Summary

Foreword

Game Boy Hardware Specifications

System Specs and Processor

Overview of hardware specs, CPU, RAM, screen, and processor.

Memory Map and Addressing

Layout of memory addresses, including RAM, ROM, and I/O regions.

Cartridge Types, Special Modes, and System Features

Covers cartridge controllers, operational modes, video, sound, timers, serial I/O, and interrupts.

Special Registers and I/O

Description of key I/O registers and special memory locations.

Game Boy CPU and Command Reference

CPU Registers and Architecture

Explains CPU registers, flag register, program counter, and stack pointer.

CPU Instruction Set Overview

Details various CPU commands including loads, ALU operations, and control flow.

Bitwise Operations and Rotates/Shifts

Covers bit manipulation instructions like rotates, shifts, BIT, SET, and RES.

Program Flow Control Instructions

Explains program flow control instructions for branching and subroutines.

Super Game Boy Commands

SGB Palettes and Borders

Details how to set SGB color palettes and manage the border.

SGB Area Designation Modes

Explains commands for block, line, and 1CHR area designation.

SGB Data Transfer Commands

Covers commands for sound transfer, SNES WRAM transfer, and character set data.

Appendix A: Emulator Notes and Timing

Emulator Notes for GB Programming

Tips for running assembly programs on emulators and real hardware.

Typical Timing Diagrams

Visual representation of read/write timing on the Game Boy bus.