「ビデオ - 2Dコア」の編集履歴（バックアップ）一覧に戻る
ビデオ - 2Dコア - (2007/07/10 (火) 23:00:08) のソース
DSには、２つのほぼ同一の2Dコアがあります。
メインコアは追加のバックグラウンドモードがあります。
注 : この情報はところどころ間違えている可能性があります。
**Core-specific registers
|Core|レジスタオフセット|
|A|0x04000000|
|B|0x04001000|
|オフセット:幅|モード|名前|
|0x00:32|R/W|DISPLAY_CR|
|0x08:16|R/W|BG0_CR|
|0x0A:16|R/W|BG1_CR|
|0x0C:16|R/W|BG2_CR|
|0x0E:16|R/W|BG3_CR|
|0x10:16|W|BG0_X|
|0x12:16|W|BG0_Y|
|0x14:16|W|BG1_X|
|0x16:16|W|BG1_Y|
|0x18:16|W|BG2_X|
|0x1A:16|W|BG2_Y|
|0x1C:16|W|BG3_X|
|0x1E:16|W|BG3_Y|
|0x20:16|W|BG2_HDX|
|0x22:16|W|BG2_HDY|
|0x24:16|W|BG2_VDX|
|0x26:16|W|BG2_VDY|
|0x28:32|W|BG2_X0|
|0x2C:32|W|BG2_Y0|
|0x30:16|W|BG3_HDX|
|0x32:16|W|BG3_HDY|
|0x34:16|W|BG3_VDX|
|0x36:16|W|BG3_VDY|
|0x38:32|W|BG3_X0|
|0x3C:32|W|BG3_Y0|
|0x40:16|W|WIN0_X|
|0x42:16|W|WIN1_X|
|0x44:16|W|WIN0_Y|
|0x46:16|W|WIN1_Y|
|0x48:16|R/W|WIN_IN (3f3f)|
|0x4A:16|R/W|WIN_OUT (3f3f)|
|0x4C:16|W|MOSAIC|
|0x50:16|R/W|BLEND_CR (3fff)|
|0x52:16|R/W|BLEND_AB (1f1f)|
|0x54:16|W|BLEND_Y|
|0x6C:16|R/W|BRIGHT_CR (c01f)|
**ディスプレイコントロール
|bit|name|
|31|Extended sprite palette enable|
|30|Extended background palette enable|
|29..24|?|
|23|?|
|22..20|Extended sprite mode|
|19..18|Framebuffer select (extended mode 2)|
|17..16|Extended mode|
|15|Sprite window enable|
|14|Window 1 enable|
|13|Window 0 enable|
|12|Sprite enable|
|11|BG3 enable|
|10|BG2 enable|
|9|BG1 enable|
|8|BG0 enable|
|7|Forced blank|
|6..4|Sprite mode|
|3|0: BG0 is 2D layer, 1: BG0 is 3D layer|
|2..0|Display mode|
拡張モード :
-0: Framebuffer
-1: GBA-style (see display mode)
-2: acts like framebuffer
-3: ?
**DISP_CR2
bit name
31 Extended sprite palette enable
30 Extended background palette enable
29..23 ?
22..20 Extended sprite mode
19..18 ?
17..16 Extended mode
15 Sprite window enable
14 Window 1 enable
13 Window 0 enable
12 Sprite enable
11 BG3 enable
10 BG2 enable
9 BG1 enable
8 BG0 enable
7 Forced blank
6..4 Sprite mode
3 ?
2..0 Display mode
Extended Mode:
* 0: ?
* 1: GBA-style (see display mode)
* 2: ?
* 3: ?
NOTE: THIS INFORMATION IS POSSIBLY WRONG Display Mode (ignored unless Extended Mode is 1):
* 0: Mode 0 (4 text layers)
* 1: Mode 1 (2 text layers, 1 rot/scale)
* 2: Mode 2 (2 rot/scale)
* 3: Mode 3 (15 bpp framebuffer, single page)
* 4: Mode 4 (8 bpp indexed framebuffer, double buffered)
* 5: Mode 5 (bg0 is text/3d, bg1 is text, bg2 is extended rot/scale background)
* 6: Mode 6 ?
Extended rot/scale background in mode 5: Size fields: BG_BMP16_128x128 BG_BMP16_256x256 BG_BMP16_512x256 BG_BMP16_512x512
Each element in the background is a 16 bit direct-color entry A1B5G5R5. If the top bit is zero, the pixel is transparent, otherwise it is opaque.
Differences to the GBA:
* Alpha bit (modes 3 and 5 were always opaque on GBA)
* Multiple sizes
* Rot/scale registers are *not* set to straight display by default
BRIGHT_CR
bit name
15..14 Mode
13..5 -
4..0 Amount
Mode:
* 00, 11: Amount ignored, middle brightness
* 01: Increase, brightness = middle + amount (0x8 and above are pretty much useless)
* 10: Decrease, brightness = middle - amount (0x8 and above are pretty much useless)
Bits marked as - read as 0, and ignore writes.
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