Nintendo 1504166 Programming Manual - Page 6

AGB Programming Manual

Revision History

©1999 - 2001 Nintendo of America Inc.

6

D.C.N. AGB-06-0001-002B4

Version

Date

Description

1.0

12/01/2000

-Deleted the checksum of ROM registration data and revised the

diagram.

-Revised the diagram for "AGB Game Link Cable" in the "Communication

Function".

-Revised the number of DMG sold from tens of millions to a hundred

million in the introduction of AGB.

-Revised the hours you can play continuously from "about 20 hours" to

"about 15 hours".

-Revised the illustrations of the AGB hardware and the Multi Player AGB

Game Link cable in the multi play communication diagram.

-Added the description of the timing chart for normal SIO communication.

-Added a caution in the DMA valid flag of all the DMA control registers.

-Added a caution in the master start bit of the multi-play control register.

-Revised the multi-play timing chart.

-Revised the memory map for system reserve area in the work RAM.

-Added a caution to "Communication Function".

-Revised the first sentence in "UART Communication".

Added "Relation

between Data register, FIFO and Shift register".

-Revised the expression of [Cautions] to a more specific expression

[Cautions for ~~].

-Added a description of X coordinate and Y coordinate for OAM.

Added

the diagram to Y coordinate.

-Revised the description of the pre-fetch buffer flag in the Game Pak

memory wait control register.

-Added cautions to the description of the input/output select flag in the R

register of general communication.

1.01

2/01/2001

-Modified the description of pin 31 in the Game Pak bus.

-Revised the cancel conditions for the Stop function in the power-down

mode.

-Added additional descriptions and cautions for the initialization flag of

Sound 1.

1.02

2/13/2001

-Modified the description of "8-Bit/32-Bit Normal Communication Function"

summary in "Communication" chapter.

-Added a paragraph to "Selecting Communication Function" in

"Communication" chapter.

1.04

3/1/2001

-Specified the method to control the OBJ display individually in

the description of the double size flag and the rotation/scaling

flag for OAM attribute 0.

-Added the description of display synchronization DMA to DMA3.

-Added the description of the DMA problem and how to avoid it at the end

of the chapter on DMA.

*Added the restrictions to the description of the repeat flag in DMA3.

*Updated the timing chart and the cable connection diagram for the multi-

play communication.

*Revised the description of the normal serial communication cautions.

Section	Page
Introduction	3
Revision History	4
Table of Contents	9
Using This Manual	12
1 AGB System	13
1.1 System Overview	13
2 System Configuration	15
2.1 CPU Block Diagram	15
2.2 Complete Block Diagram	16
2.3 Memory Configuration and Access Width	17
2.4 Little-Endian	17
3 AGB Memory	18
3.1 Overall Memory Map	18
3.2 Memory Configuration	19
3.2.1 AGB Internal Memory	19
3.2.2 Game Pak Memory	20
3.3 Game Pak Memory Wait Control	21
3.3.1 Access Timing	23
3.3.2 Game Pak Bus	24
4 LCD	25
4.1 LCD Status	26
4.1.1 V Counter	26
4.1.2 General LCD Status	27
5 Image System	29
5.1 BG Modes	31
5.1.1 Details of BG Modes	31
5.1.2 VRAM Memory Map	32
6 Rendering Functions	33
6.1 Character Mode BG (BG Modes 0-2)	33
6.1.1 BG Control	33
6.1.2 Mosaic Size	39
6.1.3 VRAM Address Mapping of BG Data	40
6.1.4 Character Data Format	42
6.1.5 BG Screen Data Format	43
6.1.6 BG Screen Data Address Mapping for the LCD Screen	45
6.1.7 BG Rotation and Scaling Features	49
6.1.8 BG Scrolling	52
6.2 Bitmap Mode BGs (BG Modes 3-5)	53
6.2.1 BG Control	53
6.2.2 BG Rotation/Scaling	54
6.2.3 Pixel Data	54
6.2.4 Pixel Data Address Mapping for the LCD Screen	55
6.2.4.1 BG Mode 3 (32,768 colors,240x160 dots,1 frame buffer)	55
6.2.4.2 BG Mode 4 (256 colors,240x160 dots,2 frame buffers)	56
6.2.4.3 BG Mode 5 (32,768 colors,160x128 dots,2 frame buffers)	57
6.3 OBJ (Object)	58
6.3.1 OBJ Function Overview	58
6.3.2 Character Data Mapping	60
6.3.3 OAM	62
6.3.4 OBJ Rotation/Scaling Feature	70
6.4 Display Priority of OBJ and BG	72
7 Color Palettes	73
7.1 Color Palette Overview	73
7.2 Color Palette RAM	74
7.3 Color Data Format	76
8 Window Feature	77
8.1 Window Position Setting	77
8.2 Window Control	78
9 Color Special Effects	80
9.1 Selection of Color Special Effects	80
9.2 Color Special Effects Processing	82
10 Sound	84
10.1 Sound Block Diagram	84
10.2 Direct Sounds A and B	85
10.3 Sound 1	87
10.4 Sound 2	91
10.5 Sound 3	93
10.6 Sound 4	97
10.7 Sound Control	100
10.8 Sound PWM Control	104
11 Timer	106
12 DMA Transfer	108
12.1 DMA 0	109
12.2 DMA 1 and 2	113
12.3 DMA 3	117
12.4 DMA Problems: How to avoid them	122
13 Communication Functions	125
13.1 8-Bit/32-Bit Normal Serial Communication	128
13.2 16-Bit Multi-player Communication	134
13.3 UART Communication Functions	142
13.4 General Purpose Communication	148
13.5 JOY Bus Communication	150
13.6 AGB Game Link Cable	154
14 Key Input	155
14.1 Key Status	155
14.2 Key Interrupt Control	155
14.2.1 Interrupt Conditions	156
15 Interrupt Control	157
15.1 System-Allocated Area in Work RAM	159
15.2 Interrupt Operation	160
15.2.1 Normal Interrupt	160
15.2.2 Multiple Interrupts	161
16 Power-Down Functions	163
16.1 Stop Function	163
16.2 Halt Function	164
17 AGB System Calls	165
17.1 System Call Operation	165
17.1.1 Normal Calls	165
17.1.2 Multiple Calls	167

Nintendo 1504166 Programming Manual - Page 6

Revised the diagram for AGB Game Link Cable in the Communication, Added Relation - play

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