registers

The registers are quite interesting, seen as a table.
from all kind of sources these tables are collected:

first here a list with registers and addresses can be found:
http://www.dspassme.com/programmers_guide/tutorial/registers.html
in this page tables are given too, with explanations

DISPLAY_CR (0x04000000)

31	30	29	28	27	26	25	24	23	22	21	20	19	18	17	16
31	BGExtPal	29	28	27	26	25	24	23	22	21	20	FBBank		ExtMode
15	14	13	12	11	10	9	8	7	6	5	4	3	2	1	0
SprWin	Win1	Win0	Obj	BG3	BG2	BG1	BG0	BlnkScr	U6	OAMHorzBlank	ObjMapMode	3D	Mode

//-------other sources------------------------------------------------------------------

BGx_CR:(background)

b15

b14

b13

b12

b11

b10

b9

b8

b7

b6

b5

b4

b3

b2

b1

b0

Size

Wrap

Map Block Num

Color Mode

Mosaic

.

.

Tile Block Num

Priority

http://edorul.ifrance.com/french/chapitre12.htm

//-------------------------------------------------------------------------------------------

Attribute : 0 (sprite attribute)

15	14	13	12	11	10	9	8	7	6	5	4	3	2	1	0
Shape		C	M	Alpha		SD	R	Y-coordinate

http://home.no/neogeo/HOVEDSIDE_INDEX/GBA_HOVEDSIDE_INDEX_ENGELSK/GBA%20HTML%20LEKSJONER%201-5/GBA_Lek4_english.htm

Attribute : 1

15	14	13	12	11	10	9	8	7	6	5	4	3	2	1	0
Form		VF	HF	Rot data index			X-coordinate

Attribute : 2

15	14	13	12	11	10	9	8	7	6	5	4	3	2	1	0
Palette nummer				Priority		Sprite number

//-------------------------------------------------------------------------------------------

REG_MOSAIC @ 0400:004Ch

F E D C	B A 9 8	7 6 5 4	3 2 1 0
Ov	Oh	Bv	Bh

http://www.coranac.com/tonc/text/gfx.htm#sec-mos

//-------------------------------------------------------------------------------------------

IRQ ( )

24	23	22	21	19 20	17 18	18	16
IRQ_WIFI	IRQ_SPI	IRQ_LID	IRQ_GEOMETRY_FIFO	IRQ_CARD IRQ_CARD_LINE	IRQ_FIFO_EMPTY IRQ_FIFO_NOT_EMPTY		IRQ_IPC_SYNC
14	13	12	11 10 9 8	7	6 5 4 3	2	1
	IRQ_CART	IRQ_KEYS	IRQ_DMA0 IRQ_DMA1 IRQ_DMA2 IRQ_DMA3	IRQ_NETWORK	IRQ_TIMER0 IRQ_TIMER1 IRQ_TIMER2 IRQ_TIMER3	IRQ_VBLANK IRQ_HBLANK IRQ_VCOUNT

http://takuto.info/libnds/arm7j/interrupts_8h.html#e384b89225fb3517bba35d3dc790c71638af5b8afc08fd0c0423b74f1e944ff9