1. Foreword Game Boy
TM
CPU Manual
Table of Contents
1. Foreword...........................................4
2. Hardware specifications............................5
2.1. Forward:.......................................5
2.2. Terms..........................................5
2.3. Game Boy Specs.................................6
2.4. Processor......................................6
2.5. Memory Map.....................................8
2.5.1. General memory map.........................8
2.5.2. Echo of 8kB Internal RAM...................9
2.5.3. User I/O...................................9
2.5.4. Reserved Memory Locations.................10
2.6. Cartridge Types...............................13
2.7. Special modi..................................17
2.7.1. Power Up Sequence.........................17
2.7.2. Stop Mode.................................19
2.7.3. Low-Power Mode............................19
2.8. Video.........................................22
2.8.1. Tiles.....................................22
2.8.2. Sprites...................................25
2.8.3. Sprite RAM Bug............................27
2.9. Sound.........................................28
2.10. Timer........................................30
2.11. Serial I/O...................................31
2.12. Interrupts...................................32
2.12.1. Interrupt Procedure......................32
2.12.2. Interrupt Descriptions...................34
2.13. Special Registers............................35
2.13.1. I/O Registers............................35
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