More work on the accelerated 2D video driver, beginnings of sprite-based rendering support. Also some initial work on an audio driver. gsoc2008_nds
authorDarren Alton <dalton@stevens.edu>
Sat, 19 Jul 2008 17:37:19 +0000
branchgsoc2008_nds
changeset 2680 4135aa9c5645
parent 2679 bc3e3e889f6d
child 2681 c15b6c758be5
More work on the accelerated 2D video driver, beginnings of sprite-based rendering support. Also some initial work on an audio driver.
Makefile.ds
include/SDL_config_nintendods.h
src/audio/SDL_audio.c
src/audio/nds/SDL_ndsaudio.c
src/audio/nds/SDL_ndsaudio.h
src/video/nds/SDL_ndsrender.c
src/video/nds/SDL_ndsvideo.c
--- a/Makefile.ds	Sun Jul 13 04:28:54 2008 +0000
+++ b/Makefile.ds	Sat Jul 19 17:37:19 2008 +0000
@@ -31,6 +31,7 @@
 src/SDL_fatal.c \
 src/audio/disk/SDL_diskaudio.c \
 src/audio/dummy/SDL_dummyaudio.c \
+src/audio/nds/SDL_ndsaudio.c \
 src/audio/SDL_audio.c \
 src/audio/SDL_audiocvt.c \
 src/audio/SDL_audiodev.c \
--- a/include/SDL_config_nintendods.h	Sun Jul 13 04:28:54 2008 +0000
+++ b/include/SDL_config_nintendods.h	Sat Jul 19 17:37:19 2008 +0000
@@ -92,14 +92,15 @@
 #define LACKS_SYS_MMAN_H 1
 
 /* Enable various audio drivers */
-#define SDL_AUDIO_DRIVER_DUMMY	1
+#define SDL_AUDIO_DRIVER_NDS	1
+/*#define SDL_AUDIO_DRIVER_DUMMY	1 TODO: uncomment this later*/
 
 /* DS doesn't have optical media */
 #define SDL_CDROM_DISABLED	1
 
 /* Enable various input drivers */
 #define SDL_JOYSTICK_NDS	1
-/*#define SDL_JOYSTICK_DUMMY	1*/
+/*#define SDL_JOYSTICK_DUMMY	1 TODO: uncomment this later*/
 
 /* DS has no dynamic linking afaik */
 #define SDL_LOADSO_DISABLED	1
@@ -113,6 +114,6 @@
 
 /* Enable various video drivers */
 #define SDL_VIDEO_DRIVER_NDS	1
-#define SDL_VIDEO_DRIVER_DUMMY	1
+/*#define SDL_VIDEO_DRIVER_DUMMY	1 TODO: uncomment this later*/
 
 #endif /* _SDL_config_nintendods_h */
--- a/src/audio/SDL_audio.c	Sun Jul 13 04:28:54 2008 +0000
+++ b/src/audio/SDL_audio.c	Sat Jul 19 17:37:19 2008 +0000
@@ -70,6 +70,7 @@
 extern AudioBootStrap DCAUD_bootstrap;
 extern AudioBootStrap MMEAUDIO_bootstrap;
 extern AudioBootStrap DART_bootstrap;
+extern AudioBootStrap NDSAUD_bootstrap;
 
 
 /* Available audio drivers */
@@ -145,6 +146,9 @@
 #if SDL_AUDIO_DRIVER_DART
     &DART_bootstrap,
 #endif
+#if SDL_AUDIO_DRIVER_NDS
+    &NDSAUD_bootstrap,
+#endif
     NULL
 };
 
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/src/audio/nds/SDL_ndsaudio.c	Sat Jul 19 17:37:19 2008 +0000
@@ -0,0 +1,92 @@
+/*
+    SDL - Simple DirectMedia Layer
+    Copyright (C) 1997-2006 Sam Lantinga
+
+    This library is free software; you can redistribute it and/or
+    modify it under the terms of the GNU Lesser General Public
+    License as published by the Free Software Foundation; either
+    version 2.1 of the License, or (at your option) any later version.
+
+    This library is distributed in the hope that it will be useful,
+    but WITHOUT ANY WARRANTY; without even the implied warranty of
+    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+    Lesser General Public License for more details.
+
+    You should have received a copy of the GNU Lesser General Public
+    License along with this library; if not, write to the Free Software
+    Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA  02110-1301  USA
+
+    Sam Lantinga
+    slouken@libsdl.org
+
+    This file written by Ryan C. Gordon (icculus@icculus.org)
+*/
+#include "SDL_config.h"
+
+/* Output audio to NDS */
+
+#include <nds.h>
+
+#include "SDL_audio.h"
+#include "../SDL_audio_c.h"
+#include "SDL_ndsaudio.h"
+
+static int
+NDSAUD_OpenDevice(_THIS, const char *devname, int iscapture)
+{
+    return 1;                   /* always succeeds. */
+}
+
+static void
+NDSAUD_PlayDevice(_THIS)
+{
+    TransferSoundData* sound = SDL_malloc(sizeof(TransferSoundData));
+    if(!sound) {
+        SDL_OutOfMemory();
+    }
+    sound->data = NULL;  /* pointer to raw audio data */
+    sound->len = 0;      /* size of raw data pointed to above */
+    sound->rate = 22050; /* sample rate = 22050Hz */
+    sound->vol = 127;    /* volume [0..127] for [min..max] */
+    sound->pan = 64;     /* balance [0..127] for [left..right] */
+    sound->format = 0;   /* 0 for 16-bit, 1 for 8-bit */
+    /* stub */
+}
+
+
+static Uint8 *
+NDSAUD_GetDeviceBuf(_THIS)
+{
+    /* stub */
+}
+
+static void
+NDSAUD_WaitDevice(_THIS)
+{
+    /* stub */
+}
+
+static void
+NDSAUD_CloseDevice(_THIS)
+{
+    /* stub */
+}
+
+static int
+NDSAUD_Init(SDL_AudioDriverImpl * impl)
+{
+    /* Set the function pointers */
+    impl->OpenDevice = NDSAUD_OpenDevice;
+    impl->PlayDevice = NDSAUD_PlayDevice;
+    impl->WaitDevice = NDSAUD_WaitDevice;
+    impl->GetDeviceBuf = NDSAUD_GetDeviceBuf;
+    impl->CloseDevice = NDSAUD_CloseDevice;
+    impl->OnlyHasDefaultOutputDevice = 1;
+    return 1;
+}
+
+AudioBootStrap NDSAUD_bootstrap = {
+    "nds", "SDL NDS audio driver", NDSAUD_Init, 1
+};
+
+/* vi: set ts=4 sw=4 expandtab: */
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/src/audio/nds/SDL_ndsaudio.h	Sat Jul 19 17:37:19 2008 +0000
@@ -0,0 +1,42 @@
+/*
+    SDL - Simple DirectMedia Layer
+    Copyright (C) 1997-2006 Sam Lantinga
+
+    This library is free software; you can redistribute it and/or
+    modify it under the terms of the GNU Lesser General Public
+    License as published by the Free Software Foundation; either
+    version 2.1 of the License, or (at your option) any later version.
+
+    This library is distributed in the hope that it will be useful,
+    but WITHOUT ANY WARRANTY; without even the implied warranty of
+    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+    Lesser General Public License for more details.
+
+    You should have received a copy of the GNU Lesser General Public
+    License along with this library; if not, write to the Free Software
+    Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA  02110-1301  USA
+
+    Sam Lantinga
+    slouken@libsdl.org
+*/
+#include "SDL_config.h"
+
+#ifndef _SDL_ndsaudio_h
+#define _SDL_ndsaudio_h
+
+#include "../SDL_sysaudio.h"
+
+/* Hidden "this" pointer for the audio functions */
+#define _THIS	SDL_AudioDevice *this
+
+struct SDL_PrivateAudioData
+{
+    /* The file descriptor for the audio device */
+    Uint8 *mixbuf;
+    Uint32 mixlen;
+    Uint32 write_delay;
+    Uint32 initial_calls;
+};
+
+#endif /* _SDL_ndsaudio_h */
+/* vi: set ts=4 sw=4 expandtab: */
--- a/src/video/nds/SDL_ndsrender.c	Sun Jul 13 04:28:54 2008 +0000
+++ b/src/video/nds/SDL_ndsrender.c	Sat Jul 19 17:37:19 2008 +0000
@@ -159,6 +159,7 @@
 /*  Uint32 Rmask = 0x7C00, Gmask = 0x03E0, Bmask = 0x001F, Amask = 0x8000;
     Uint32 Rmask = 0x001F, Gmask = 0x03E0, Bmask = 0x7C00, Amask = 0x8000;
 */
+printf("+NDS_CreateRenderer\n");
 
     /* hard coded this to BGR555 for now */
     if (!SDL_PixelFormatEnumToMasks(SDL_PIXELFORMAT_BGR555, &bpp,
@@ -220,6 +221,7 @@
     data->bg_taken[2] = data->bg_taken[3] = 0;
     data->sub = 0;
 
+printf("-NDS_CreateRenderer\n");
     return renderer;
 }
 
@@ -228,6 +230,7 @@
 {
     NDS_RenderData *data = (NDS_RenderData *) renderer->driverdata;
     /* stub. TODO: figure out what needs to be done, if anything. */
+printf("!NDS_ActivateRenderer\n");
     return 0;
 }
 
@@ -236,6 +239,7 @@
 {
     NDS_RenderData *data = (NDS_RenderData *) renderer->driverdata;
     /* stub. TODO: figure out what needs to be done */
+printf("!NDS_DisplayModeChanged\n");
     return 0;
 }
 
@@ -244,6 +248,7 @@
 {
     NDS_RenderData *data = (NDS_RenderData *) renderer->driverdata;
     NDS_TextureData *txdat = NULL;
+printf("+NDS_CreateTexture\n");
     if (SDL_ISPIXELFORMAT_FOURCC(texture->format)) {
         SDL_SetError("Unsupported texture format");
         return -1;
@@ -301,6 +306,7 @@
         }
     }
 
+printf("-NDS_CreateTexture\n");
     if (!texture->driverdata) {
         return -1;
     }
@@ -311,6 +317,7 @@
 NDS_QueryTexturePixels(SDL_Renderer * renderer, SDL_Texture * texture,
                       void **pixels, int *pitch)
 {
+printf("+NDS_QueryTexturePixels\n");
     if (SDL_ISPIXELFORMAT_FOURCC(texture->format)) {
         SDL_SetError("Unsupported texture format");
         return -1;
@@ -319,6 +326,7 @@
 
         *pixels = txdat->vram;
         *pitch = txdat->dim.pitch;
+printf("-NDS_QueryTexturePixels\n");
         return 0;
     }
 }
@@ -327,12 +335,14 @@
 NDS_SetTexturePalette(SDL_Renderer * renderer, SDL_Texture * texture,
                      const SDL_Color * colors, int firstcolor, int ncolors)
 {
+printf("+NDS_SetTexturePalette\n");
     if (SDL_ISPIXELFORMAT_FOURCC(texture->format)) {
         SDL_SetError("YUV textures don't have a palette");
         return -1;
     } else {
         NDS_TextureData *txdat = (NDS_TextureData *) texture->driverdata;
         /* TODO: mess with 8-bit modes and/or 16-color palette modes */
+printf("-NDS_SetTexturePalette\n");
         return 0;
     }
 }
@@ -341,11 +351,13 @@
 NDS_GetTexturePalette(SDL_Renderer * renderer, SDL_Texture * texture,
                      SDL_Color * colors, int firstcolor, int ncolors)
 {
+printf("+NDS_GetTexturePalette\n");
     if (SDL_ISPIXELFORMAT_FOURCC(texture->format)) {
         SDL_SetError("YUV textures don't have a palette");
         return -1;
     } else {
         NDS_TextureData *txdat = (NDS_TextureData *) texture->driverdata;
+printf("-NDS_GetTexturePalette\n");
         /* TODO: mess with 8-bit modes and/or 16-color palette modes */
         return 0;
     }
@@ -354,6 +366,7 @@
 static int
 NDS_SetTextureColorMod(SDL_Renderer * renderer, SDL_Texture * texture)
 {
+printf("!NDS_SetTextureColorMod\n");
     /* stub. TODO: figure out what needs to be done, if anything */
     return 0;
 }
@@ -361,6 +374,7 @@
 static int
 NDS_SetTextureAlphaMod(SDL_Renderer * renderer, SDL_Texture * texture)
 {
+printf("!NDS_SetTextureAlphaMod\n");
     /* stub. TODO: figure out what needs to be done, if anything */
     return 0;
 }
@@ -368,6 +382,7 @@
 static int
 NDS_SetTextureBlendMode(SDL_Renderer * renderer, SDL_Texture * texture)
 {
+printf("!NDS_SetTextureBlendMode\n");
     /* stub. TODO: figure out what needs to be done, if anything */
     return 0;
 }
@@ -375,6 +390,7 @@
 static int
 NDS_SetTextureScaleMode(SDL_Renderer * renderer, SDL_Texture * texture)
 {
+printf("!NDS_SetTextureScaleMode\n");
     /* stub. TODO: figure out what needs to be done.
        (NDS hardware scaling is nearest neighbor.) */
     return 0;
@@ -384,6 +400,7 @@
 NDS_UpdateTexture(SDL_Renderer * renderer, SDL_Texture * texture,
                  const SDL_Rect * rect, const void *pixels, int pitch)
 {
+printf("+NDS_UpdateTexture\n");
     if (SDL_ISPIXELFORMAT_FOURCC(texture->format)) {
         SDL_SetError("Unsupported texture format");
         return -1;
@@ -403,6 +420,7 @@
             src += pitch;
             dst += txdat->dim.pitch;
         }
+printf("-NDS_UpdateTexture\n");
         return 0;
     }
 }
@@ -412,6 +430,7 @@
                const SDL_Rect * rect, int markDirty, void **pixels,
                int *pitch)
 {
+printf("+NDS_LockTexture\n");
     if (SDL_ISPIXELFORMAT_FOURCC(texture->format)) {
         SDL_SetError("Unsupported texture format");
         return -1;
@@ -421,6 +440,7 @@
         *pixels = (void *) ((u8 *)txdat->vram + rect->y * txdat->dim.pitch
                             + rect->x * (txdat->dim.bpp/8));
         *pitch = txdat->dim.pitch;
+printf("-NDS_LockTexture\n");
         return 0;
     }
 }
@@ -431,12 +451,14 @@
     if (SDL_ISPIXELFORMAT_FOURCC(texture->format)) {
         SDL_SetError("Unsupported texture format");
     }
+printf("!NDS_UnlockTexture\n");
 }
 
 static void
 NDS_DirtyTexture(SDL_Renderer * renderer, SDL_Texture * texture,
                 int numrects, const SDL_Rect * rects)
 { /* stub */
+printf("!NDS_DirtyTexture\n");
 }
 
 static int
@@ -448,6 +470,7 @@
     u16 color;
     int i, j;
 
+printf("+NDS_RenderFill\n");
     /* TODO: make a single-color sprite and stretch it.
     color = RGB15(r>>3,g>>3,b>>3);
     for (i = real_rect.x; i < real_rect.x+real_rect.w; ++i) {
@@ -456,6 +479,7 @@
                 0x8000 | color;
         }
     }*/
+printf("-NDS_RenderFill\n");
     return 0;
 }
 
@@ -467,6 +491,7 @@
     SDL_Window *window = SDL_GetWindowFromID(renderer->window);
     SDL_VideoDisplay *display = SDL_GetDisplayFromWindow(window);
 
+printf("+NDS_RenderCopy\n");
 #if 0
     if (SDL_ISPIXELFORMAT_FOURCC(texture->format)) {
         SDL_Surface *target = data->screens[data->current_screen];
@@ -485,6 +510,7 @@
         return SDL_LowerBlit(surface, &real_srcrect, target, &real_dstrect);
     }
 #endif
+printf("-NDS_RenderCopy\n");
     return 0;
 }
 
@@ -495,21 +521,25 @@
     NDS_RenderData *data = (NDS_RenderData *) renderer->driverdata;
     /* Send the data to the display TODO */
 
+printf("+NDS_RenderPresent\n");
     /* Update the flipping chain, if any */
     if (renderer->info.flags & SDL_RENDERER_PRESENTVSYNC) {
         swiWaitForVBlank();
     }
+printf("-NDS_RenderPresent\n");
 }
 
 static void
 NDS_DestroyTexture(SDL_Renderer * renderer, SDL_Texture * texture)
 {
+printf("+NDS_DestroyTexture\n");
     if (SDL_ISPIXELFORMAT_FOURCC(texture->format)) {
         SDL_SetError("Unsupported texture format");
     } else {
         /* free anything else allocated for texture */
         SDL_free(texture->driverdata);
     }
+printf("-NDS_DestroyTexture\n");
 }
 
 static void
@@ -520,6 +550,7 @@
     SDL_VideoDisplay *display = SDL_GetDisplayFromWindow(window);*/
     int i;
 
+printf("+NDS_DestroyRenderer\n");
     if (data) {
         /* TODO: free anything relevant. */
         /*for (i = 0; i < SDL_arraysize(data->texture); ++i) {
@@ -539,6 +570,7 @@
         SDL_free(data);
     }
     SDL_free(renderer);
+printf("-NDS_DestroyRenderer\n");
 }
 
 /* vi: set ts=4 sw=4 expandtab: */
--- a/src/video/nds/SDL_ndsvideo.c	Sun Jul 13 04:28:54 2008 +0000
+++ b/src/video/nds/SDL_ndsvideo.c	Sat Jul 19 17:37:19 2008 +0000
@@ -21,16 +21,8 @@
 */
 #include "SDL_config.h"
 
-/* Dummy SDL video driver implementation; this is just enough to make an
- *  SDL-based application THINK it's got a working video driver, for
- *  applications that call SDL_Init(SDL_INIT_VIDEO) when they don't need it,
- *  and also for use as a collection of stubs when porting SDL to a new
- *  platform for which you haven't yet written a valid video driver.
- *
- * This is also a great way to determine bottlenecks: if you think that SDL
- *  is a performance problem for a given platform, enable this driver, and
- *  then see if your application runs faster without video overhead.
- *
+/* SDL Nintendo DS video driver implementation
+ * based on dummy driver:
  * Initial work by Ryan C. Gordon (icculus@icculus.org). A good portion
  *  of this was cut-and-pasted from Stephane Peter's work in the AAlib
  *  SDL video driver.  Renamed to "DUMMY" by Sam Lantinga.
@@ -39,6 +31,9 @@
 #include <stdio.h>
 #include <stdlib.h>
 #include <nds.h>
+#include <nds/arm9/sprite.h>
+#include <nds/arm9/trig_lut.h>
+#include <nds/arm9/video.h>
 
 #include "SDL_video.h"
 #include "SDL_mouse.h"
@@ -57,12 +52,71 @@
 static int NDS_SetDisplayMode(_THIS, SDL_DisplayMode * mode);
 static void NDS_VideoQuit(_THIS);
 
-/* DUMMY driver bootstrap functions */
+/* NDS sprite-related functions */
+
+#define SPRITE_DMA_CHANNEL 3
+#define SPRITE_ANGLE_MASK 0x01FF
+
+void
+NDS_OAM_Update(tOAM *oam)
+{
+    DC_FlushAll();
+    dmaCopyHalfWords(SPRITE_DMA_CHANNEL, oam->spriteBuffer, OAM,
+                     SPRITE_COUNT * sizeof(SpriteEntry));
+}
+
+void
+NDS_OAM_RotateSprite(SpriteRotation *spriteRotation, u16 angle)
+{
+    s16 s = SIN[angle & SPRITE_ANGLE_MASK] >> 4;
+    s16 c = COS[angle & SPRITE_ANGLE_MASK] >> 4;
+
+    spriteRotation->hdx = c;
+    spriteRotation->hdy = s;
+    spriteRotation->vdx = -s;
+    spriteRotation->vdy = c;
+}
 
+void
+NDS_OAM_Init(tOAM *oam)
+{
+    int i;
+    for(i = 0; i < SPRITE_COUNT; i++) {
+        oam->spriteBuffer[i].attribute[0] = ATTR0_DISABLED;
+        oam->spriteBuffer[i].attribute[1] = 0;
+        oam->spriteBuffer[i].attribute[2] = 0;
+    }
+    for(i = 0; i < MATRIX_COUNT; i++) {
+        NDS_OAM_RotateSprite(&(oam->matrixBuffer[i]), 0);
+    }
+    swiWaitForVBlank();
+    NDS_OAM_Update(oam);
+}
+
+void
+NDS_OAM_HideSprite(SpriteEntry *spriteEntry)
+{
+    spriteEntry->isRotoscale = 0;
+    spriteEntry->isHidden = 1;
+}
+
+void
+NDS_OAM_ShowSprite(SpriteEntry *spriteEntry, int affine, int double_bound)
+{
+    if (affine) {
+        spriteEntry->isRotoscale = 1;
+        spriteEntry->rsDouble = double_bound;
+    } else {
+        spriteEntry->isHidden = 0;
+    }
+}
+
+
+/* SDL NDS driver bootstrap functions */
 static int
 NDS_Available(void)
 {
-    const char *envr = SDL_getenv("SDL_VIDEODRIVER");
+    /*const char *envr = SDL_getenv("SDL_VIDEODRIVER");*/
     /*printf("NDS_Available()\n"); */
     return (1);
 }
@@ -79,6 +133,7 @@
     SDL_VideoDevice *device;
     /*printf("NDS_CreateDevice(%d)\n", devindex); */
 
+printf("+NDS_CreateDevice\n");
     /* Initialize all variables that we clean on shutdown */
     device = (SDL_VideoDevice *) SDL_calloc(1, sizeof(SDL_VideoDevice));
     if (!device) {
@@ -99,6 +154,7 @@
 
     device->free = NDS_DeleteDevice;
 
+printf("-NDS_CreateDevice\n");
     return device;
 }
 
@@ -113,7 +169,8 @@
     SDL_DisplayMode mode;
     int i;
 
-    /* simple 256x192x15x60 for now */
+printf("+NDS_VideoInit\n");
+    /* simple 256x192x16x60 for now */
     mode.w = 256;
     mode.h = 192;
     mode.format = SDL_PIXELFORMAT_ABGR1555;
@@ -129,49 +186,41 @@
     SDL_AddDisplayMode(0, &mode);
 
     /* hackish stuff to get things up and running for now, and for a console */
-    powerON(POWER_ALL);
    irqInit();
+    powerON(POWER_ALL_2D);
    irqInit();
     irqEnable(IRQ_VBLANK);
     NDS_SetDisplayMode(_this, &mode);
+printf("-NDS_VideoInit\n");
     return 0;
 }
 
 static int
 NDS_SetDisplayMode(_THIS, SDL_DisplayMode * mode)
 {
+printf("+NDS_SetDisplayMode\n");
     /* right now this function is just hard-coded for 256x192 ABGR1555 */
     videoSetMode(MODE_5_2D | DISPLAY_BG3_ACTIVE);       /* display on main core */
     videoSetModeSub(MODE_0_2D | DISPLAY_BG0_ACTIVE);    /* debug text on sub */
-    vramSetMainBanks(VRAM_A_MAIN_BG_0x06000000, VRAM_B_LCD,
-                     VRAM_C_SUB_BG, VRAM_D_LCD);
-
+    vramSetMainBanks(VRAM_A_MAIN_BG_0x06000000, VRAM_B_MAIN_BG_0x06020000,
+                     VRAM_C_SUB_BG_0x06200000,  VRAM_C_SUB_BG_0x06220000);
+    vramSetBankE(VRAM_E_MAIN_SPRITE);
     /* set up console for debug text 'n stuff */
     SUB_BG0_CR = BG_MAP_BASE(31);
     BG_PALETTE_SUB[255] = RGB15(31, 31, 31);
+   /* debugging purposes, uncomment this later.  then remove it & add 2screen.
     consoleInitDefault((u16 *) SCREEN_BASE_BLOCK_SUB(31),
-                       (u16 *) CHAR_BASE_BLOCK_SUB(0), 16);
-
-#if 0
-/* we should be using this as a texture for rendering, not as a framebuffer */
-    /* maps well to the 256x192 screen anyway.  note: need VRAM_B for bigger */
-    BACKGROUND.control[3] = BG_BMP16_256x256;
-    /* affine transformation matrix.  nothing too fancy here */
-    BG3_XDX = 0x100;
-    BG3_XDY = 0;
-    BG3_YDX = 0;
-    BG3_YDY = 0x100;
-    /* x/y position */
-    BG3_CX = 0;
-    BG3_CY = 0;
-#endif
+                       (u16 *) CHAR_BASE_BLOCK_SUB(0), 16);*/
+printf("-NDS_SetDisplayMode\n");
     return 0;
 }
 
 void
 NDS_VideoQuit(_THIS)
 {
+printf("+NDS_VideoQuit\n");
     videoSetMode(DISPLAY_SCREEN_OFF);
     videoSetModeSub(DISPLAY_SCREEN_OFF);
     vramSetMainBanks(VRAM_A_LCD, VRAM_B_LCD, VRAM_C_LCD, VRAM_D_LCD);
+printf("-NDS_VideoQuit\n");
 }
 
 /* vi: set ts=4 sw=4 expandtab: */