From b1758ac4d80768e90e46932a47d327484734d0c3 Mon Sep 17 00:00:00 2001
From: Sam Lantinga <slouken@libsdl.org>
Date: Sat, 5 Oct 2002 16:50:56 +0000
Subject: [PATCH] Added initial support for Dreamcast (thanks HERO!)

---
 Makefile.am                       |   2 +
 Makefile.dc                       | 105 +++++++
 README.DC                         |  37 +++
 docs.html                         |   1 +
 src/audio/Makefile.am             |   2 +-
 src/audio/SDL_audio.c             |   3 +
 src/audio/SDL_sysaudio.h          |   3 +
 src/audio/dc/.cvsignore           |   6 +
 src/audio/dc/Makefile.am          |  11 +
 src/audio/dc/SDL_dcaudio.c        | 245 +++++++++++++++
 src/audio/dc/SDL_dcaudio.h        |  45 +++
 src/audio/dc/aica.c               | 267 +++++++++++++++++
 src/audio/dc/aica.h               |  17 ++
 src/cdrom/Makefile.am             |   2 +-
 src/cdrom/dc/.cvsignore           |   6 +
 src/cdrom/dc/Makefile.am          |   8 +
 src/cdrom/dc/SDL_syscdrom.c       | 176 +++++++++++
 src/joystick/Makefile.am          |   2 +-
 src/joystick/dc/.cvsignore        |   6 +
 src/joystick/dc/Makefile.am       |   8 +
 src/joystick/dc/SDL_sysjoystick.c | 203 +++++++++++++
 src/thread/Makefile.am            |   1 +
 src/thread/dc/SDL_syscond.c       | 223 ++++++++++++++
 src/thread/dc/SDL_syscond_c.h     |  27 ++
 src/thread/dc/SDL_sysmutex.c      | 135 +++++++++
 src/thread/dc/SDL_sysmutex_c.h    |  27 ++
 src/thread/dc/SDL_syssem.c        | 180 +++++++++++
 src/thread/dc/SDL_syssem_c.h      |  27 ++
 src/thread/dc/SDL_systhread.c     |  98 ++++++
 src/thread/dc/SDL_systhread_c.h   |  29 ++
 src/timer/Makefile.am             |   1 +
 src/timer/dc/SDL_systimer.c       | 106 +++++++
 src/video/Makefile.am             |   2 +-
 src/video/SDL_sysvideo.h          |   3 +
 src/video/SDL_video.c             |   3 +
 src/video/dc/.cvsignore           |   6 +
 src/video/dc/Makefile.am          |  14 +
 src/video/dc/SDL_dcevents.c       | 164 ++++++++++
 src/video/dc/SDL_dcevents_c.h     |  42 +++
 src/video/dc/SDL_dcmouse.c        |  45 +++
 src/video/dc/SDL_dcmouse_c.h      |  35 +++
 src/video/dc/SDL_dcvideo.c        | 477 ++++++++++++++++++++++++++++++
 src/video/dc/SDL_dcvideo.h        |  51 ++++
 43 files changed, 2847 insertions(+), 4 deletions(-)
 create mode 100644 Makefile.dc
 create mode 100644 README.DC
 create mode 100644 src/audio/dc/.cvsignore
 create mode 100644 src/audio/dc/Makefile.am
 create mode 100644 src/audio/dc/SDL_dcaudio.c
 create mode 100644 src/audio/dc/SDL_dcaudio.h
 create mode 100644 src/audio/dc/aica.c
 create mode 100644 src/audio/dc/aica.h
 create mode 100644 src/cdrom/dc/.cvsignore
 create mode 100644 src/cdrom/dc/Makefile.am
 create mode 100644 src/cdrom/dc/SDL_syscdrom.c
 create mode 100644 src/joystick/dc/.cvsignore
 create mode 100644 src/joystick/dc/Makefile.am
 create mode 100644 src/joystick/dc/SDL_sysjoystick.c
 create mode 100644 src/thread/dc/SDL_syscond.c
 create mode 100644 src/thread/dc/SDL_syscond_c.h
 create mode 100644 src/thread/dc/SDL_sysmutex.c
 create mode 100644 src/thread/dc/SDL_sysmutex_c.h
 create mode 100644 src/thread/dc/SDL_syssem.c
 create mode 100644 src/thread/dc/SDL_syssem_c.h
 create mode 100644 src/thread/dc/SDL_systhread.c
 create mode 100644 src/thread/dc/SDL_systhread_c.h
 create mode 100644 src/timer/dc/SDL_systimer.c
 create mode 100644 src/video/dc/.cvsignore
 create mode 100644 src/video/dc/Makefile.am
 create mode 100644 src/video/dc/SDL_dcevents.c
 create mode 100644 src/video/dc/SDL_dcevents_c.h
 create mode 100644 src/video/dc/SDL_dcmouse.c
 create mode 100644 src/video/dc/SDL_dcmouse_c.h
 create mode 100644 src/video/dc/SDL_dcvideo.c
 create mode 100644 src/video/dc/SDL_dcvideo.h

diff --git a/Makefile.am b/Makefile.am
index 1510ba813..e61a32a44 100644
--- a/Makefile.am
+++ b/Makefile.am
@@ -25,6 +25,7 @@ EXTRA_DIST =		\
 	README		\
 	README.AmigaOS	\
 	README.CVS	\
+	README.DC	\
 	README.Epoc	\
 	README.MacOS	\
 	README.MacOSX	\
@@ -40,6 +41,7 @@ EXTRA_DIST =		\
 	VisualC.html	\
 	VisualC.zip	\
 	VisualCE.zip	\
+	Makefile.dc	\
 	MPWmake.sea.bin	\
 	CWprojects.sea.bin \
 	PBProjects.tar.gz \
diff --git a/Makefile.dc b/Makefile.dc
new file mode 100644
index 000000000..467391326
--- /dev/null
+++ b/Makefile.dc
@@ -0,0 +1,105 @@
+#GL=1
+
+CC = sh-elf-gcc -ml -m4-single-only
+AR = sh-elf-ar
+KOS_BASE=/prog/kos-1.1.7
+INCS = -I$(KOS_BASE)/libc/include -I$(KOS_BASE)/include -I$(KOS_BASE)/kernel/arch/dreamcast/include
+DEFS =-DNO_SIGNAL_H -DENABLE_DC
+
+ifdef GL
+DEFS += -DHAVE_OPENGL
+TARGET = libSDL_gl.a
+else
+TARGET = libSDL.a
+endif
+
+OPTFLAGS=-O2 -fomit-frame-pointer
+CFLAGS=-D_arch_dreamcast $(DEFS) $(INCS) -Iinclude -Isrc -Isrc/audio -Isrc/cdrom -Isrc/endian -Isrc/events -Isrc/joystick -Isrc/thread/dc -Isrc/thread -Isrc/timer -Isrc/video $(OPTFLAGS)
+
+SRCS = \
+	src/audio/dc/SDL_dcaudio.c \
+	src/audio/dc/aica.c \
+	src/audio/SDL_audio.c \
+	src/audio/SDL_audiocvt.c \
+	src/audio/SDL_audiodev.c \
+	src/audio/SDL_audiomem.c \
+	src/audio/SDL_mixer.c \
+	src/audio/SDL_wave.c \
+	src/cdrom/dc/SDL_syscdrom.c \
+	src/cdrom/SDL_cdrom.c \
+	src/endian/SDL_endian.c \
+	src/events/SDL_active.c \
+	src/events/SDL_events.c \
+	src/events/SDL_expose.c \
+	src/events/SDL_keyboard.c \
+	src/events/SDL_mouse.c \
+	src/events/SDL_quit.c \
+	src/events/SDL_resize.c \
+	src/file/SDL_rwops.c \
+	src/joystick/dc/SDL_sysjoystick.c \
+	src/joystick/SDL_joystick.c \
+	src/SDL.c \
+	src/SDL_error.c \
+	src/SDL_fatal.c \
+	src/SDL_getenv.c \
+	src/SDL_loadso.c \
+	src/thread/dc/SDL_syscond.c \
+	src/thread/dc/SDL_sysmutex.c \
+	src/thread/dc/SDL_syssem.c \
+	src/thread/dc/SDL_systhread.c \
+	src/thread/SDL_thread.c \
+	src/timer/dc/SDL_systimer.c \
+	src/timer/SDL_timer.c \
+	src/video/dc/SDL_dcevents.c \
+	src/video/dc/SDL_dcvideo.c \
+	src/video/SDL_blit.c \
+	src/video/SDL_blit_0.c \
+	src/video/SDL_blit_1.c \
+	src/video/SDL_blit_A.c \
+	src/video/SDL_blit_N.c \
+	src/video/SDL_bmp.c \
+	src/video/SDL_cursor.c \
+	src/video/SDL_gamma.c \
+	src/video/SDL_pixels.c \
+	src/video/SDL_RLEaccel.c \
+	src/video/SDL_stretch.c \
+	src/video/SDL_surface.c \
+	src/video/SDL_video.c \
+	src/video/SDL_yuv.c \
+	src/video/SDL_yuv_sw.c \
+
+OBJS = $(SRCS:.c=.o)
+
+TEST = \
+	test/checkkeys.c \
+	test/graywin.c \
+	test/loopwave.c \
+	test/testalpha.c \
+	test/testbitmap.c \
+	test/testcdrom.c \
+	test/testerror.c \
+	test/testgamma.c \
+	test/testgl.c \
+	test/testhread.c \
+	test/testjoystick.c \
+	test/testkeys.c \
+	test/testlock.c \
+	test/testoverlay.c \
+	test/testpalette.c \
+	test/testsem.c \
+	test/testsprite.c \
+	test/testtimer.c \
+	test/testtypes.c \
+	test/testver.c \
+	test/testvidinfo.c \
+	test/testwin.c \
+	test/testwm.c \
+	test/threadwin.c \
+	test/torturethread.c \
+
+clean:
+	rm $(OBJS)
+
+$(TARGET) : $(OBJS)
+	$(AR) rcs $(TARGET) $(OBJS)
+
diff --git a/README.DC b/README.DC
new file mode 100644
index 000000000..c7c39b183
--- /dev/null
+++ b/README.DC
@@ -0,0 +1,37 @@
+SDL for Dreamcast (beta2)
+
+	BERO
+	bero@geocities.co.jp
+
+	http://www.geocities.co.jp/Playtown/2004/
+
+this work with kos-newlib
+http://sourceforge.net/projects/dcquake/
+
+compile
+- edit KOS_BASE in Makefie.dc for your enviroment
+- make -f Makefile.dc
+
+FIXME: The KOS thread files can be found on HERO's site - not in the SDL source.
+- overwrite thread/*.c to kos-1.1.7/kernel/thread
+- rebuild kos
+
+compile with gl support
+- install latest libgl from http://sourceforge.net/projects/dcquake/
+- uncomment GL=1 in Makefile.dc
+- make -f Makefile.dc clean
+- make -f Makefile.dc
+
+install
+- copy include/*.h and libSDL.a or libSDL_gl.a for your enviroment
+
+changelog:
+
+beta2
+- OpenGL support
+- Hardware page flip support
+
+beta
+- thread, timer don't tested so much.
+- not support OpenGL
+
diff --git a/docs.html b/docs.html
index 66688f5b5..924bc6751 100644
--- a/docs.html
+++ b/docs.html
@@ -16,6 +16,7 @@ <H2>
 Major changes since SDL 1.0.0:
 </H2>
 <UL>
+	<LI> 1.2.5: Added initial support for Dreamcast (thanks HERO!)
 	<LI> 1.2.5: Updated Borland projects for Kylix 3 (thanks Dominique)
 	<LI> 1.2.5: Added project files for embedded Visual C++ 4.0
 	<LI> 1.2.5: Added SDL_BUTTON_WHEELUP (4) and SDL_BUTTON_WHEELDOWN (5)
diff --git a/src/audio/Makefile.am b/src/audio/Makefile.am
index 8330d280a..9b3a2afa0 100644
--- a/src/audio/Makefile.am
+++ b/src/audio/Makefile.am
@@ -6,7 +6,7 @@ noinst_LTLIBRARIES = libaudio.la
 # Define which subdirectories need to be built
 SUBDIRS = @AUDIO_SUBDIRS@
 DIST_SUBDIRS = alsa arts baudio dma dmedia dsp esd macrom nas nto openbsd \
-	paudio sun ums windib windx5 disk mint
+	paudio sun ums windib windx5 disk mint dc
 
 DRIVERS = @AUDIO_DRIVERS@
 
diff --git a/src/audio/SDL_audio.c b/src/audio/SDL_audio.c
index 287fa26bd..97d00b7fb 100644
--- a/src/audio/SDL_audio.c
+++ b/src/audio/SDL_audio.c
@@ -88,6 +88,9 @@ static AudioBootStrap *bootstrap[] = {
 #endif
 #ifdef DISKAUD_SUPPORT
 	&DISKAUD_bootstrap,
+#endif
+#ifdef ENABLE_DC
+	&DCAUD_bootstrap,
 #endif
 	NULL
 };
diff --git a/src/audio/SDL_sysaudio.h b/src/audio/SDL_sysaudio.h
index 55ad91f05..3d1ad9e94 100644
--- a/src/audio/SDL_sysaudio.h
+++ b/src/audio/SDL_sysaudio.h
@@ -153,6 +153,9 @@ extern AudioBootStrap MINTAUDIO_bootstrap;
 #ifdef DISKAUD_SUPPORT
 extern AudioBootStrap DISKAUD_bootstrap;
 #endif
+#ifdef ENABLE_DC
+extern AudioBootStrap DCAUD_bootstrap;
+#endif
 
 /* This is the current audio device */
 extern SDL_AudioDevice *current_audio;
diff --git a/src/audio/dc/.cvsignore b/src/audio/dc/.cvsignore
new file mode 100644
index 000000000..899d53557
--- /dev/null
+++ b/src/audio/dc/.cvsignore
@@ -0,0 +1,6 @@
+Makefile.in
+Makefile
+.libs
+*.o
+*.lo
+*.la
diff --git a/src/audio/dc/Makefile.am b/src/audio/dc/Makefile.am
new file mode 100644
index 000000000..a5d0e1cfe
--- /dev/null
+++ b/src/audio/dc/Makefile.am
@@ -0,0 +1,11 @@
+
+## Makefile.am for SDL on the Dreamcast console
+
+noinst_LTLIBRARIES = libaudio_dc.la
+libaudio_dc_la_SOURCES = $(SRCS)
+
+# The SDL audio driver sources
+SRCS =	SDL_dcaudio.c	\
+	SDL_dcaudio.h	\
+	aica.c		\
+	aica.h
diff --git a/src/audio/dc/SDL_dcaudio.c b/src/audio/dc/SDL_dcaudio.c
new file mode 100644
index 000000000..8e84c299e
--- /dev/null
+++ b/src/audio/dc/SDL_dcaudio.c
@@ -0,0 +1,245 @@
+/*
+    SDL - Simple DirectMedia Layer
+    Copyright (C) 1997, 1998, 1999, 2000, 2001, 2002  Sam Lantinga
+
+    This library is free software; you can redistribute it and/or
+    modify it under the terms of the GNU Library General Public
+    License as published by the Free Software Foundation; either
+    version 2 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
+    Library General Public License for more details.
+
+    You should have received a copy of the GNU Library General Public
+    License along with this library; if not, write to the Free
+    Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
+
+    BERO <bero@geocities.co.jp>
+    based on SDL_diskaudio.c by Sam Lantinga <slouken@libsdl.org>
+
+*/
+
+#ifdef SAVE_RCSID
+static char rcsid =
+ "@(#) $Id$";
+#endif
+
+/* Output dreamcast aica */
+
+#include <stdlib.h>
+#include <stdio.h>
+#include <string.h>
+#include <errno.h>
+#include <unistd.h>
+#include <sys/stat.h>
+#include <sys/types.h>
+#include <sys/stat.h>
+#include <fcntl.h>
+
+
+#include "SDL_audio.h"
+#include "SDL_error.h"
+#include "SDL_audiomem.h"
+#include "SDL_audio_c.h"
+#include "SDL_timer.h"
+#include "SDL_audiodev_c.h"
+#include "SDL_dcaudio.h"
+
+#include "aica.h"
+#include <dc/spu.h>
+
+/* Audio driver functions */
+static int DCAUD_OpenAudio(_THIS, SDL_AudioSpec *spec);
+static void DCAUD_WaitAudio(_THIS);
+static void DCAUD_PlayAudio(_THIS);
+static Uint8 *DCAUD_GetAudioBuf(_THIS);
+static void DCAUD_CloseAudio(_THIS);
+
+/* Audio driver bootstrap functions */
+static int DCAUD_Available(void)
+{
+	return 1;
+}
+
+static void DCAUD_DeleteDevice(SDL_AudioDevice *device)
+{
+	free(device->hidden);
+	free(device);
+}
+
+static SDL_AudioDevice *DCAUD_CreateDevice(int devindex)
+{
+	SDL_AudioDevice *this;
+
+	/* Initialize all variables that we clean on shutdown */
+	this = (SDL_AudioDevice *)malloc(sizeof(SDL_AudioDevice));
+	if ( this ) {
+		memset(this, 0, (sizeof *this));
+		this->hidden = (struct SDL_PrivateAudioData *)
+				malloc((sizeof *this->hidden));
+	}
+	if ( (this == NULL) || (this->hidden == NULL) ) {
+		SDL_OutOfMemory();
+		if ( this ) {
+			free(this);
+		}
+		return(0);
+	}
+	memset(this->hidden, 0, (sizeof *this->hidden));
+
+	/* Set the function pointers */
+	this->OpenAudio = DCAUD_OpenAudio;
+	this->WaitAudio = DCAUD_WaitAudio;
+	this->PlayAudio = DCAUD_PlayAudio;
+	this->GetAudioBuf = DCAUD_GetAudioBuf;
+	this->CloseAudio = DCAUD_CloseAudio;
+
+	this->free = DCAUD_DeleteDevice;
+
+	spu_init();
+
+	return this;
+}
+
+AudioBootStrap DCAUD_bootstrap = {
+	"dcaudio", "Dreamcast AICA audio",
+	DCAUD_Available, DCAUD_CreateDevice
+};
+
+/* This function waits until it is possible to write a full sound buffer */
+static void DCAUD_WaitAudio(_THIS)
+{
+	if (this->hidden->playing) {
+		/* wait */
+		while(aica_get_pos(0)/this->spec.samples == this->hidden->nextbuf) {
+			thd_pass();
+		}
+	}
+}
+
+#define	SPU_RAM_BASE	0xa0800000
+
+static void spu_memload_stereo8(int leftpos,int rightpos,void *src0,size_t size)
+{
+	uint8 *src = src0;
+	uint32 *left  = (uint32*)(leftpos +SPU_RAM_BASE);
+	uint32 *right = (uint32*)(rightpos+SPU_RAM_BASE);
+	size = (size+7)/8;
+	while(size--) {
+		unsigned lval,rval;
+		lval = *src++;
+		rval = *src++;
+		lval|= (*src++)<<8;
+		rval|= (*src++)<<8;
+		lval|= (*src++)<<16;
+		rval|= (*src++)<<16;
+		lval|= (*src++)<<24;
+		rval|= (*src++)<<24;
+		g2_write_32(left++,lval);
+		g2_write_32(right++,rval);
+		g2_fifo_wait();
+	}
+}
+
+static void spu_memload_stereo16(int leftpos,int rightpos,void *src0,size_t size)
+{
+	uint16 *src = src0;
+	uint32 *left  = (uint32*)(leftpos +SPU_RAM_BASE);
+	uint32 *right = (uint32*)(rightpos+SPU_RAM_BASE);
+	size = (size+7)/8;
+	while(size--) {
+		unsigned lval,rval;
+		lval = *src++;
+		rval = *src++;
+		lval|= (*src++)<<16;
+		rval|= (*src++)<<16;
+		g2_write_32(left++,lval);
+		g2_write_32(right++,rval);
+		g2_fifo_wait();
+	}
+}
+
+static void DCAUD_PlayAudio(_THIS)
+{
+	SDL_AudioSpec *spec = &this->spec;
+	unsigned int offset;
+
+	if (this->hidden->playing) {
+		/* wait */
+		while(aica_get_pos(0)/spec->samples == this->hidden->nextbuf) {
+			thd_pass();
+		}
+	}
+
+	offset = this->hidden->nextbuf*spec->size;
+	this->hidden->nextbuf^=1;
+	/* Write the audio data, checking for EAGAIN on broken audio drivers */
+	if (spec->channels==1) {
+		spu_memload(this->hidden->leftpos+offset,this->hidden->mixbuf,this->hidden->mixlen);
+	} else {
+		offset/=2;
+		if ((this->spec.format&255)==8) {
+			spu_memload_stereo8(this->hidden->leftpos+offset,this->hidden->rightpos+offset,this->hidden->mixbuf,this->hidden->mixlen);
+		} else {
+			spu_memload_stereo16(this->hidden->leftpos+offset,this->hidden->rightpos+offset,this->hidden->mixbuf,this->hidden->mixlen);
+		}
+	}
+
+	if (!this->hidden->playing) {
+		int mode;
+		this->hidden->playing = 1;
+		mode = (spec->format==AUDIO_S8)?SM_8BIT:SM_16BIT;
+		if (spec->channels==1) {
+			aica_play(0,mode,this->hidden->leftpos,0,spec->samples*2,spec->freq,255,128,1);
+		} else {
+			aica_play(0,mode,this->hidden->leftpos ,0,spec->samples*2,spec->freq,255,0,1);
+			aica_play(1,mode,this->hidden->rightpos,0,spec->samples*2,spec->freq,255,255,1);
+		}
+	}
+}
+
+static Uint8 *DCAUD_GetAudioBuf(_THIS)
+{
+	return(this->hidden->mixbuf);
+}
+
+static void DCAUD_CloseAudio(_THIS)
+{
+	aica_stop(0);
+	if (this->spec.channels==2) aica_stop(1);
+	if ( this->hidden->mixbuf != NULL ) {
+		SDL_FreeAudioMem(this->hidden->mixbuf);
+		this->hidden->mixbuf = NULL;
+	}
+}
+
+static int DCAUD_OpenAudio(_THIS, SDL_AudioSpec *spec)
+{
+	switch(spec->format&0xff) {
+	case  8: spec->format = AUDIO_S8; break;
+	case 16: spec->format = AUDIO_S16LSB; break;
+	default:
+		SDL_SetError("Unsupported audio format");
+		return(-1);
+	}
+
+	/* Update the fragment size as size in bytes */
+	SDL_CalculateAudioSpec(spec);
+
+	/* Allocate mixing buffer */
+	this->hidden->mixlen = spec->size;
+	this->hidden->mixbuf = (Uint8 *) SDL_AllocAudioMem(this->hidden->mixlen);
+	if ( this->hidden->mixbuf == NULL ) {
+		return(-1);
+	}
+	memset(this->hidden->mixbuf, spec->silence, spec->size);
+	this->hidden->leftpos = 0x11000;
+	this->hidden->rightpos = 0x11000+spec->size;
+	this->hidden->playing = 0;
+	this->hidden->nextbuf = 0;
+
+	/* We're ready to rock and roll. :-) */
+	return(0);
+}
diff --git a/src/audio/dc/SDL_dcaudio.h b/src/audio/dc/SDL_dcaudio.h
new file mode 100644
index 000000000..8084e19ab
--- /dev/null
+++ b/src/audio/dc/SDL_dcaudio.h
@@ -0,0 +1,45 @@
+/*
+    SDL - Simple DirectMedia Layer
+    Copyright (C) 1997, 1998, 1999, 2000, 2001, 2002  Sam Lantinga
+
+    This library is free software; you can redistribute it and/or
+    modify it under the terms of the GNU Library General Public
+    License as published by the Free Software Foundation; either
+    version 2 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
+    Library General Public License for more details.
+
+    You should have received a copy of the GNU Library General Public
+    License along with this library; if not, write to the Free
+    Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
+
+    BERO <bero@geocities.co.jp>
+    based on SDL_diskaudio.h by Sam Lantinga <slouken@libsdl.org>
+*/
+
+#ifdef SAVE_RCSID
+static char rcsid =
+ "@(#) $Id$";
+#endif
+
+#ifndef _SDL_diskaudio_h
+#define _SDL_diskaudio_h
+
+#include "SDL_sysaudio.h"
+
+/* Hidden "this" pointer for the video functions */
+#define _THIS	SDL_AudioDevice *this
+
+struct SDL_PrivateAudioData {
+	/* The file descriptor for the audio device */
+	Uint8 *mixbuf;
+	Uint32 mixlen;
+	int playing;
+	int leftpos,rightpos;
+	int nextbuf;
+};
+
+#endif /* _SDL_diskaudio_h */
diff --git a/src/audio/dc/aica.c b/src/audio/dc/aica.c
new file mode 100644
index 000000000..160c2857f
--- /dev/null
+++ b/src/audio/dc/aica.c
@@ -0,0 +1,267 @@
+/* This file is part of the Dreamcast function library.
+ * Please see libdream.c for further details.
+ *
+ * (c)2000 Dan Potter
+ * modify BERO
+ */
+#include "aica.h"
+
+/* #define dc_snd_base ((volatile unsigned char *)0x00800000) */ /* arm side */
+#define dc_snd_base ((volatile unsigned char *)0xa0700000) /* dc side */
+
+/* Some convienence macros */
+#define	SNDREGADDR(x)	(0xa0700000 + (x))
+#define	CHNREGADDR(ch,x)	SNDREGADDR(0x80*(ch)+(x))
+
+
+#define SNDREG32(x)	(*(volatile unsigned long *)SNDREGADDR(x))
+#define SNDREG8(x)	(*(volatile unsigned char *)SNDREGADDR(x))
+#define CHNREG32(ch, x) (*(volatile unsigned long *)CHNREGADDR(ch,x))
+#define CHNREG8(ch, x)	(*(volatile unsigned long *)CHNREGADDR(ch,x))
+
+#define G2_LOCK(OLD) \
+	do { \
+		if (!irq_inside_int()) \
+			OLD = irq_disable(); \
+		/* suspend any G2 DMA here... */ \
+		while((*(volatile unsigned int *)0xa05f688c) & 0x20) \
+			; \
+	} while(0)
+
+#define G2_UNLOCK(OLD) \
+	do { \
+		/* resume any G2 DMA here... */ \
+		if (!irq_inside_int()) \
+			irq_restore(OLD); \
+	} while(0)
+
+
+void aica_init() {
+	int i, j, old;
+	
+	/* Initialize AICA channels */	
+	G2_LOCK(old);
+	SNDREG32(0x2800) = 0x0000;
+	
+	for (i=0; i<64; i++) {
+		for (j=0; j<0x80; j+=4) {
+			if ((j&31)==0) g2_fifo_wait();
+			CHNREG32(i, j) = 0;
+		}
+		g2_fifo_wait();
+		CHNREG32(i,0) = 0x8000;
+		CHNREG32(i,20) = 0x1f;
+	}
+
+	SNDREG32(0x2800) = 0x000f;
+	g2_fifo_wait();
+	G2_UNLOCK(old);
+}
+
+/* Translates a volume from linear form to logarithmic form (required by
+   the AICA chip */
+/* int logs[] = {
+
+0, 40, 50, 58, 63, 68, 73, 77, 80, 83, 86, 89, 92, 94, 97, 99, 101, 103,
+105, 107, 109, 111, 112, 114, 116, 117, 119, 120, 122, 123, 125, 126, 127,
+129, 130, 131, 133, 134, 135, 136, 137, 139, 140, 141, 142, 143, 144, 145,
+146, 147, 148, 149, 150, 151, 152, 153, 154, 155, 156, 156, 157, 158, 159,
+160, 161, 162, 162, 163, 164, 165, 166, 166, 167, 168, 169, 170, 170, 171,
+172, 172, 173, 174, 175, 175, 176, 177, 177, 178, 179, 180, 180, 181, 182,
+182, 183, 183, 184, 185, 185, 186, 187, 187, 188, 188, 189, 190, 190, 191,
+191, 192, 193, 193, 194, 194, 195, 196, 196, 197, 197, 198, 198, 199, 199,
+200, 201, 201, 202, 202, 203, 203, 204, 204, 205, 205, 206, 206, 207, 207,
+208, 208, 209, 209, 210, 210, 211, 211, 212, 212, 213, 213, 214, 214, 215,
+215, 216, 216, 217, 217, 217, 218, 218, 219, 219, 220, 220, 221, 221, 222,
+222, 222, 223, 223, 224, 224, 225, 225, 225, 226, 226, 227, 227, 228, 228,
+228, 229, 229, 230, 230, 230, 231, 231, 232, 232, 232, 233, 233, 234, 234,
+234, 235, 235, 236, 236, 236, 237, 237, 238, 238, 238, 239, 239, 240, 240,
+240, 241, 241, 241, 242, 242, 243, 243, 243, 244, 244, 244, 245, 245, 245,
+246, 246, 247, 247, 247, 248, 248, 248, 249, 249, 249, 250, 250, 250, 251,
+251, 251, 252, 252, 252, 253, 253, 253, 254, 254, 254, 255
+
+}; */
+
+const static unsigned char logs[] = {
+	0, 15, 22, 27, 31, 35, 39, 42, 45, 47, 50, 52, 55, 57, 59, 61,
+	63, 65, 67, 69, 71, 73, 74, 76, 78, 79, 81, 82, 84, 85, 87, 88,
+	90, 91, 92, 94, 95, 96, 98, 99, 100, 102, 103, 104, 105, 106,
+	108, 109, 110, 111, 112, 113, 114, 116, 117, 118, 119, 120, 121,
+	122, 123, 124, 125, 126, 127, 128, 129, 130, 131, 132, 133, 134,
+	135, 136, 137, 138, 138, 139, 140, 141, 142, 143, 144, 145, 146,
+	146, 147, 148, 149, 150, 151, 152, 152, 153, 154, 155, 156, 156,
+	157, 158, 159, 160, 160, 161, 162, 163, 164, 164, 165, 166, 167,
+	167, 168, 169, 170, 170, 171, 172, 173, 173, 174, 175, 176, 176,
+	177, 178, 178, 179, 180, 181, 181, 182, 183, 183, 184, 185, 185,
+	186, 187, 187, 188, 189, 189, 190, 191, 191, 192, 193, 193, 194,
+	195, 195, 196, 197, 197, 198, 199, 199, 200, 200, 201, 202, 202,
+	203, 204, 204, 205, 205, 206, 207, 207, 208, 209, 209, 210, 210,
+	211, 212, 212, 213, 213, 214, 215, 215, 216, 216, 217, 217, 218,
+	219, 219, 220, 220, 221, 221, 222, 223, 223, 224, 224, 225, 225,
+	226, 227, 227, 228, 228, 229, 229, 230, 230, 231, 232, 232, 233,
+	233, 234, 234, 235, 235, 236, 236, 237, 237, 238, 239, 239, 240,
+	240, 241, 241, 242, 242, 243, 243, 244, 244, 245, 245, 246, 246,
+	247, 247, 248, 248, 249, 249, 250, 250, 251, 251, 252, 252, 253, 254, 255
+};
+
+/* For the moment this is going to have to suffice, until we really
+   figure out what these mean. */
+#define AICA_PAN(x) ((x)==0x80?(0):((x)<0x80?(0x1f):(0x0f)))
+#define AICA_VOL(x) (0xff - logs[128 + (((x) & 0xff) / 2)])
+//#define AICA_VOL(x) (0xff - logs[x&255])
+
+static inline unsigned  AICA_FREQ(unsigned freq)	{
+	unsigned long freq_lo, freq_base = 5644800;
+	int freq_hi = 7;
+
+	/* Need to convert frequency to floating point format
+	   (freq_hi is exponent, freq_lo is mantissa)
+	   Formula is ferq = 44100*2^freq_hi*(1+freq_lo/1024) */
+	while (freq < freq_base && freq_hi > -8) {
+		freq_base >>= 1;
+		--freq_hi;
+	}
+	while (freq < freq_base && freq_hi > -8) {
+		freq_base >>= 1;
+		freq_hi--;
+	}
+	freq_lo = (freq<<10) / freq_base;
+	return (freq_hi << 11) | (freq_lo & 1023);
+}
+
+/* Sets up a sound channel completely. This is generally good if you want
+   a quick and dirty way to play notes. If you want a more comprehensive
+   set of routines (more like PC wavetable cards) see below.
+   
+   ch is the channel to play on (0 - 63)
+   smpptr is the pointer to the sound data; if you're running off the
+     SH4, then this ought to be (ptr - 0xa0800000); otherwise it's just
+     ptr. Basically, it's an offset into sound ram.
+   mode is one of the mode constants (16 bit, 8 bit, ADPCM)
+   nsamp is the number of samples to play (not number of bytes!)
+   freq is the sampling rate of the sound
+   vol is the volume, 0 to 0xff (0xff is louder)
+   pan is a panning constant -- 0 is left, 128 is center, 255 is right.
+
+   This routine (and the similar ones) owe a lot to Marcus' sound example -- 
+   I hadn't gotten quite this far into dissecting the individual regs yet. */
+void aica_play(int ch,int mode,unsigned long smpptr,int loopst,int loopend,int freq,int vol,int pan,int loopflag) {
+	int i;
+	int val;
+	int old;
+
+	/* Stop the channel (if it's already playing) */
+	aica_stop(ch);
+	/* doesn't seem to be needed, but it's here just in case */
+/*
+	for (i=0; i<256; i++) {
+		asm("nop");
+		asm("nop");
+		asm("nop");
+		asm("nop");
+	}
+*/
+	G2_LOCK(old);
+	/* Envelope setup. The first of these is the loop point,
+	   e.g., where the sample starts over when it loops. The second
+	   is the loop end. This is the full length of the sample when
+	   you are not looping, or the loop end point when you are (though
+	   storing more than that is a waste of memory if you're not doing
+	   volume enveloping). */
+	CHNREG32(ch, 8) = loopst & 0xffff;
+	CHNREG32(ch, 12) = loopend & 0xffff;
+	
+	/* Write resulting values */
+	CHNREG32(ch, 24) = AICA_FREQ(freq);
+	
+	/* Set volume, pan, and some other things that we don't know what
+	   they do =) */
+	CHNREG32(ch, 36) = AICA_PAN(pan) | (0xf<<8);
+	/* Convert the incoming volume and pan into hardware values */
+	/* Vol starts at zero so we can ramp */
+	vol = AICA_VOL(vol);
+	CHNREG32(ch, 40) = 0x24 | (vol<<8);
+	/* Convert the incoming volume and pan into hardware values */
+	/* Vol starts at zero so we can ramp */
+
+	/* If we supported volume envelopes (which we don't yet) then
+	   this value would set that up. The top 4 bits determine the
+	   envelope speed. f is the fastest, 1 is the slowest, and 0
+	   seems to be an invalid value and does weird things). The
+	   default (below) sets it into normal mode (play and terminate/loop).
+	CHNREG32(ch, 16) = 0xf010;
+	*/
+	CHNREG32(ch, 16) = 0x1f;	/* No volume envelope */
+	
+	
+	/* Set sample format, buffer address, and looping control. If
+	   0x0200 mask is set on reg 0, the sample loops infinitely. If
+	   it's not set, the sample plays once and terminates. We'll
+	   also set the bits to start playback here. */
+	CHNREG32(ch, 4) = smpptr & 0xffff;
+	val = 0xc000 | 0x0000 | (mode<<7) | (smpptr >> 16);
+	if (loopflag) val|=0x200;
+	
+	CHNREG32(ch, 0) = val;
+	
+	G2_UNLOCK(old);
+
+	/* Enable playback */
+	/* CHNREG32(ch, 0) |= 0xc000; */
+	g2_fifo_wait();
+
+#if 0
+	for (i=0xff; i>=vol; i--) {
+		if ((i&7)==0) g2_fifo_wait();
+		CHNREG32(ch, 40) =  0x24 | (i<<8);;
+	}
+
+	g2_fifo_wait();
+#endif
+}
+
+/* Stop the sound on a given channel */
+void aica_stop(int ch) {
+	g2_write_32(CHNREGADDR(ch, 0),(g2_read_32(CHNREGADDR(ch, 0)) & ~0x4000) | 0x8000);
+	g2_fifo_wait();
+}
+
+
+/* The rest of these routines can change the channel in mid-stride so you
+   can do things like vibrato and panning effects. */
+   
+/* Set channel volume */
+void aica_vol(int ch,int vol) {
+//	g2_write_8(CHNREGADDR(ch, 41),AICA_VOL(vol));
+	g2_write_32(CHNREGADDR(ch, 40),(g2_read_32(CHNREGADDR(ch, 40))&0xffff00ff)|(AICA_VOL(vol)<<8) );
+	g2_fifo_wait();
+}
+
+/* Set channel pan */
+void aica_pan(int ch,int pan) {
+//	g2_write_8(CHNREGADDR(ch, 36),AICA_PAN(pan));
+	g2_write_32(CHNREGADDR(ch, 36),(g2_read_32(CHNREGADDR(ch, 36))&0xffffff00)|(AICA_PAN(pan)) );
+	g2_fifo_wait();
+}
+
+/* Set channel frequency */
+void aica_freq(int ch,int freq) {
+	g2_write_32(CHNREGADDR(ch, 24),AICA_FREQ(freq));
+	g2_fifo_wait();
+}
+
+/* Get channel position */
+int aica_get_pos(int ch) {
+#if 1
+	/* Observe channel ch */
+	g2_write_32(SNDREGADDR(0x280c),(g2_read_32(SNDREGADDR(0x280c))&0xffff00ff) | (ch<<8));
+	g2_fifo_wait();
+	/* Update position counters */
+	return g2_read_32(SNDREGADDR(0x2814)) & 0xffff;
+#else
+	/* Observe channel ch */
+	g2_write_8(SNDREGADDR(0x280d),ch);
+	/* Update position counters */
+	return g2_read_32(SNDREGADDR(0x2814)) & 0xffff;
+#endif
+}
diff --git a/src/audio/dc/aica.h b/src/audio/dc/aica.h
new file mode 100644
index 000000000..d9e7098e9
--- /dev/null
+++ b/src/audio/dc/aica.h
@@ -0,0 +1,17 @@
+#ifndef _AICA_H_
+#define _AICA_H_
+
+#define	AICA_MEM	0xa0800000
+
+#define SM_8BIT		1
+#define SM_16BIT	0
+#define SM_ADPCM	2
+
+void aica_play(int ch,int mode,unsigned long smpptr,int looptst,int loopend,int freq,int vol,int pan,int loopflag);
+void aica_stop(int ch);
+void aica_vol(int ch,int vol);
+void aica_pan(int ch,int pan);
+void aica_freq(int ch,int freq);
+int aica_get_pos(int ch);
+
+#endif
diff --git a/src/cdrom/Makefile.am b/src/cdrom/Makefile.am
index 73a3551c7..29b81d2b5 100644
--- a/src/cdrom/Makefile.am
+++ b/src/cdrom/Makefile.am
@@ -5,7 +5,7 @@ noinst_LTLIBRARIES = libcdrom.la
 
 # Define which subdirectories need to be built
 SUBDIRS = @CDROM_SUBDIRS@
-DIST_SUBDIRS = aix beos bsdi dummy freebsd linux macos openbsd qnx win32
+DIST_SUBDIRS = aix beos bsdi dc dummy freebsd linux macos openbsd qnx win32
 
 DRIVERS = @CDROM_DRIVERS@
 
diff --git a/src/cdrom/dc/.cvsignore b/src/cdrom/dc/.cvsignore
new file mode 100644
index 000000000..899d53557
--- /dev/null
+++ b/src/cdrom/dc/.cvsignore
@@ -0,0 +1,6 @@
+Makefile.in
+Makefile
+.libs
+*.o
+*.lo
+*.la
diff --git a/src/cdrom/dc/Makefile.am b/src/cdrom/dc/Makefile.am
new file mode 100644
index 000000000..7bf356eeb
--- /dev/null
+++ b/src/cdrom/dc/Makefile.am
@@ -0,0 +1,8 @@
+
+## Makefile.am for the Dreamcast cdrom driver for SDL
+
+noinst_LTLIBRARIES = libcdrom_dc.la
+libcdrom_dc_la_SOURCES = $(SRCS)
+
+# The SDL cdrom driver sources
+SRCS = SDL_syscdrom.c
diff --git a/src/cdrom/dc/SDL_syscdrom.c b/src/cdrom/dc/SDL_syscdrom.c
new file mode 100644
index 000000000..4a1be8e79
--- /dev/null
+++ b/src/cdrom/dc/SDL_syscdrom.c
@@ -0,0 +1,176 @@
+/*
+    SDL - Simple DirectMedia Layer
+    Copyright (C) 1997, 1998, 1999, 2000, 2001, 2002  Sam Lantinga
+
+    This library is free software; you can redistribute it and/or
+    modify it under the terms of the GNU Library General Public
+    License as published by the Free Software Foundation; either
+    version 2 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
+    Library General Public License for more details.
+
+    You should have received a copy of the GNU Library General Public
+    License along with this library; if not, write to the Free
+    Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
+
+    BERO
+    bero@geocities.co.jp
+
+    based on win32/SDL_syscdrom.c by
+
+    Sam Lantinga
+    slouken@libsdl.org
+*/
+
+#ifdef SAVE_RCSID
+static char rcsid =
+ "@(#) $Id$";
+#endif
+
+/* Functions for system-level CD-ROM audio control */
+
+#include <stdlib.h>
+#include <stdio.h>
+#include <dc/cdrom.h>
+#include <dc/spu.h>
+
+#include "SDL_error.h"
+#include "SDL_cdrom.h"
+#include "SDL_syscdrom.h"
+
+/* The system-dependent CD control functions */
+static const char *SDL_SYS_CDName(int drive);
+static int SDL_SYS_CDOpen(int drive);
+static int SDL_SYS_CDGetTOC(SDL_CD *cdrom);
+static CDstatus SDL_SYS_CDStatus(SDL_CD *cdrom, int *position);
+static int SDL_SYS_CDPlay(SDL_CD *cdrom, int start, int length);
+static int SDL_SYS_CDPause(SDL_CD *cdrom);
+static int SDL_SYS_CDResume(SDL_CD *cdrom);
+static int SDL_SYS_CDStop(SDL_CD *cdrom);
+static int SDL_SYS_CDEject(SDL_CD *cdrom);
+static void SDL_SYS_CDClose(SDL_CD *cdrom);
+
+
+int  SDL_SYS_CDInit(void)
+{
+	/* Fill in our driver capabilities */
+	SDL_CDcaps.Name = SDL_SYS_CDName;
+	SDL_CDcaps.Open = SDL_SYS_CDOpen;
+	SDL_CDcaps.GetTOC = SDL_SYS_CDGetTOC;
+	SDL_CDcaps.Status = SDL_SYS_CDStatus;
+	SDL_CDcaps.Play = SDL_SYS_CDPlay;
+	SDL_CDcaps.Pause = SDL_SYS_CDPause;
+	SDL_CDcaps.Resume = SDL_SYS_CDResume;
+	SDL_CDcaps.Stop = SDL_SYS_CDStop;
+	SDL_CDcaps.Eject = SDL_SYS_CDEject;
+	SDL_CDcaps.Close = SDL_SYS_CDClose;
+
+	return(0);
+}
+
+static const char *SDL_SYS_CDName(int drive)
+{
+	return "/cd";
+}
+
+static int SDL_SYS_CDOpen(int drive)
+{
+	return(drive);
+}
+
+#define	TRACK_CDDA	0
+static int SDL_SYS_CDGetTOC(SDL_CD *cdrom)
+{
+	CDROM_TOC toc;
+	int ret,i;
+
+	ret = cdrom_read_toc(&toc,0);
+	if (ret!=ERR_OK) {
+		return -1;
+	}
+
+	cdrom->numtracks = TOC_TRACK(toc.last)-TOC_TRACK(toc.first)+1;
+	for(i=0;i<cdrom->numtracks;i++) {
+		unsigned long entry = toc.entry[i];
+		cdrom->track[i].id = i+1;
+		cdrom->track[i].type = (TOC_CTRL(toc.entry[i])==TRACK_CDDA)?SDL_AUDIO_TRACK:SDL_DATA_TRACK;
+		cdrom->track[i].offset = TOC_LBA(entry)-150;
+		cdrom->track[i].length = TOC_LBA((i+1<toc.last)?toc.entry[i+1]:toc.dunno)-TOC_LBA(entry);
+	}
+
+	return 0;
+}
+
+/* Get CD-ROM status */
+static CDstatus SDL_SYS_CDStatus(SDL_CD *cdrom, int *position)
+{
+	CDstatus status;
+	int ret,dc_status,disc_type;
+
+	ret = cdrom_get_status(&dc_status,&disc_type);
+	if (ret!=ERR_OK) return CD_ERROR;
+
+	switch(dc_status) {
+//	case CD_STATUS_BUSY:
+	case CD_STATUS_PAUSED:
+		return CD_PAUSED;
+	case CD_STATUS_STANDBY:
+		return CD_STOPPED;
+	case CD_STATUS_PLAYING:
+		return CD_PLAYING;
+//	case CD_STATUS_SEEKING:
+//	case CD_STATUS_SCANING:
+	case CD_STATUS_OPEN:
+	case CD_STATUS_NO_DISC:
+		return CD_TRAYEMPTY;
+	default:
+		return	CD_ERROR;
+	}
+}
+
+/* Start play */
+static int SDL_SYS_CDPlay(SDL_CD *cdrom, int start, int length)
+{
+	int ret = cdrom_cdda_play(start-150,start-150+length,1,CDDA_SECTORS);
+	return ret==ERR_OK?0:-1;
+}
+
+/* Pause play */
+static int SDL_SYS_CDPause(SDL_CD *cdrom)
+{
+	int ret=cdrom_cdda_pause();
+	return ret==ERR_OK?0:-1;
+}
+
+/* Resume play */
+static int SDL_SYS_CDResume(SDL_CD *cdrom)
+{
+	int ret=cdrom_cdda_resume();
+	return ret==ERR_OK?0:-1;
+}
+
+/* Stop play */
+static int SDL_SYS_CDStop(SDL_CD *cdrom)
+{
+	int ret=cdrom_spin_down();
+	return ret==ERR_OK?0:-1;
+}
+
+/* Eject the CD-ROM */
+static int SDL_SYS_CDEject(SDL_CD *cdrom)
+{
+	return -1;
+}
+
+/* Close the CD-ROM handle */
+static void SDL_SYS_CDClose(SDL_CD *cdrom)
+{
+}
+
+void SDL_SYS_CDQuit(void)
+{
+
+}
diff --git a/src/joystick/Makefile.am b/src/joystick/Makefile.am
index b88f107d8..0e0decd6e 100644
--- a/src/joystick/Makefile.am
+++ b/src/joystick/Makefile.am
@@ -5,7 +5,7 @@ noinst_LTLIBRARIES = libjoystick.la
 
 # Define which subdirectories need to be built
 SUBDIRS = @JOYSTICK_SUBDIRS@
-DIST_SUBDIRS = dummy amigaos beos bsd darwin linux macos mint win32
+DIST_SUBDIRS = dummy amigaos beos bsd darwin dc linux macos mint win32
 
 DRIVERS = @JOYSTICK_DRIVERS@
 
diff --git a/src/joystick/dc/.cvsignore b/src/joystick/dc/.cvsignore
new file mode 100644
index 000000000..899d53557
--- /dev/null
+++ b/src/joystick/dc/.cvsignore
@@ -0,0 +1,6 @@
+Makefile.in
+Makefile
+.libs
+*.o
+*.lo
+*.la
diff --git a/src/joystick/dc/Makefile.am b/src/joystick/dc/Makefile.am
new file mode 100644
index 000000000..da51e95ca
--- /dev/null
+++ b/src/joystick/dc/Makefile.am
@@ -0,0 +1,8 @@
+
+## Makefile.am for the Dreamcast joystick driver for SDL
+
+noinst_LTLIBRARIES = libjoystick_dc.la
+libjoystick_dc_la_SOURCES = $(SRCS)
+
+# The SDL joystick driver sources
+SRCS =  SDL_sysjoystick.c
diff --git a/src/joystick/dc/SDL_sysjoystick.c b/src/joystick/dc/SDL_sysjoystick.c
new file mode 100644
index 000000000..ab5a4d177
--- /dev/null
+++ b/src/joystick/dc/SDL_sysjoystick.c
@@ -0,0 +1,203 @@
+/*
+    SDL - Simple DirectMedia Layer
+    Copyright (C) 1997, 1998, 1999, 2000, 2001, 2002  Sam Lantinga
+
+    This library is free software; you can redistribute it and/or
+    modify it under the terms of the GNU Library General Public
+    License as published by the Free Software Foundation; either
+    version 2 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
+    Library General Public License for more details.
+
+    You should have received a copy of the GNU Library General Public
+    License along with this library; if not, write to the Free
+    Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
+
+    BERO
+    bero@geocities.co.jp
+
+    based on win32/SDL_mmjoystick.c
+
+    Sam Lantinga
+    slouken@libsdl.org
+*/
+
+#ifdef SAVE_RCSID
+static char rcsid =
+ "@(#) $Id$";
+#endif
+
+/* Win32 MultiMedia Joystick driver, contributed by Andrei de A. Formiga */
+
+#include <stdlib.h>
+#include <stdio.h>		/* For the definition of NULL */
+
+#include "SDL_error.h"
+#include "SDL_joystick.h"
+#include "SDL_sysjoystick.h"
+#include "SDL_joystick_c.h"
+
+#include <dc/maple.h>
+#include <dc/maple/controller.h>
+
+#define MAX_JOYSTICKS	8	/* only 2 are supported in the multimedia API */
+#define MAX_AXES	6	/* each joystick can have up to 6 axes */
+#define MAX_BUTTONS	8	/* and 8 buttons                      */
+#define	MAX_HATS	2
+
+#define	JOYNAMELEN	8
+
+/* array to hold joystick ID values */
+static uint8	SYS_Joystick_addr[MAX_JOYSTICKS];
+
+/* The private structure used to keep track of a joystick */
+struct joystick_hwdata
+{
+	cont_cond_t prev_cond;
+	int prev_buttons;
+};
+
+/* Function to scan the system for joysticks.
+ * This function should set SDL_numjoysticks to the number of available
+ * joysticks.  Joystick 0 should be the system default joystick.
+ * It should return 0, or -1 on an unrecoverable fatal error.
+ */
+int SDL_SYS_JoystickInit(void)
+{
+	int numdevs;
+
+	int p,u;
+
+	numdevs = 0;
+	for(p=0;p<MAPLE_PORT_COUNT;p++) {
+		for(u=0;u<MAPLE_UNIT_COUNT;u++) {
+			if (maple_device_func(p,u)&MAPLE_FUNC_CONTROLLER) {
+				SYS_Joystick_addr[numdevs] = maple_addr(p,u);
+				numdevs++;
+			}
+		}
+	}
+
+	return(numdevs);
+}
+
+/* Function to get the device-dependent name of a joystick */
+const char *SDL_SYS_JoystickName(int index)
+{
+	maple_device_t *dev;
+	if (maple_compat_resolve(SYS_Joystick_addr[index],&dev,MAPLE_FUNC_CONTROLLER)!=0) return NULL;
+	return dev->info.product_name;
+}
+
+/* Function to open a joystick for use.
+   The joystick to open is specified by the index field of the joystick.
+   This should fill the nbuttons and naxes fields of the joystick structure.
+   It returns 0, or -1 if there is an error.
+ */
+int SDL_SYS_JoystickOpen(SDL_Joystick *joystick)
+{
+	/* allocate memory for system specific hardware data */
+	joystick->hwdata = (struct joystick_hwdata *) malloc(sizeof(*joystick->hwdata));
+	if (joystick->hwdata == NULL)
+	{
+		SDL_OutOfMemory();
+		return(-1);
+	}
+	memset(joystick->hwdata, 0, sizeof(*joystick->hwdata));
+
+	/* fill nbuttons, naxes, and nhats fields */
+	joystick->nbuttons = MAX_BUTTONS;
+	joystick->naxes = MAX_AXES;
+	joystick->nhats = MAX_HATS;
+	return(0);
+}
+
+
+/* Function to update the state of a joystick - called as a device poll.
+ * This function shouldn't update the joystick structure directly,
+ * but instead should call SDL_PrivateJoystick*() to deliver events
+ * and update joystick device state.
+ */
+
+void SDL_SYS_JoystickUpdate(SDL_Joystick *joystick)
+{
+const	int sdl_buttons[] = {
+	CONT_C,
+	CONT_B,
+	CONT_A,
+	CONT_START,
+	CONT_Z,
+	CONT_Y,
+	CONT_X,
+	CONT_D
+};
+
+	uint8 addr;
+	cont_cond_t cond,*prev_cond;
+	int buttons,prev_buttons,i,changed;
+
+	addr = SYS_Joystick_addr[joystick->index];
+	if (cont_get_cond(addr,&cond)<0) return;
+
+	buttons = cond.buttons;
+	prev_buttons = joystick->hwdata->prev_buttons;
+	changed = buttons^prev_buttons;
+
+	if ((changed)&(CONT_DPAD_UP|CONT_DPAD_DOWN|CONT_DPAD_LEFT|CONT_DPAD_RIGHT)) {
+		int hat = SDL_HAT_CENTERED;
+		if (buttons&CONT_DPAD_UP) hat|=SDL_HAT_UP;
+		if (buttons&CONT_DPAD_DOWN) hat|=SDL_HAT_DOWN;
+		if (buttons&CONT_DPAD_LEFT) hat|=SDL_HAT_LEFT;
+		if (buttons&CONT_DPAD_RIGHT) hat|=SDL_HAT_RIGHT;
+		SDL_PrivateJoystickHat(joystick, 0, hat);
+	}
+	if ((changed)&(CONT_DPAD2_UP|CONT_DPAD2_DOWN|CONT_DPAD2_LEFT|CONT_DPAD2_RIGHT)) {
+		int hat = SDL_HAT_CENTERED;
+		if (buttons&CONT_DPAD2_UP) hat|=SDL_HAT_UP;
+		if (buttons&CONT_DPAD2_DOWN) hat|=SDL_HAT_DOWN;
+		if (buttons&CONT_DPAD2_LEFT) hat|=SDL_HAT_LEFT;
+		if (buttons&CONT_DPAD2_RIGHT) hat|=SDL_HAT_RIGHT;
+		SDL_PrivateJoystickHat(joystick, 1, hat);
+	}
+
+	for(i=0;i<sizeof(sdl_buttons)/sizeof(sdl_buttons[0]);i++) {
+		if (changed & sdl_buttons[i]) {
+			SDL_PrivateJoystickButton(joystick, i, (buttons & sdl_buttons[i])?SDL_PRESSED:SDL_RELEASED);
+		}
+	}
+
+	prev_cond = &joystick->hwdata->prev_cond;
+	if (cond.joyx!=prev_cond->joyx)
+		SDL_PrivateJoystickAxis(joystick, 0, cond.joyx-128);
+	if (cond.joyy!=prev_cond->joyy)
+		SDL_PrivateJoystickAxis(joystick, 1, cond.joyy-128);
+	if (cond.rtrig!=prev_cond->rtrig)
+		SDL_PrivateJoystickAxis(joystick, 2, cond.rtrig);
+	if (cond.ltrig!=prev_cond->ltrig)
+		SDL_PrivateJoystickAxis(joystick, 3, cond.ltrig);
+	if (cond.joy2x!=prev_cond->joy2x)
+		SDL_PrivateJoystickAxis(joystick, 4, cond.joy2x-128);
+	if (cond.joy2y!=prev_cond->joy2y)
+		SDL_PrivateJoystickAxis(joystick, 5, cond.joy2y-128);
+
+	joystick->hwdata->prev_buttons = buttons;
+	joystick->hwdata->prev_cond = cond;
+}
+
+/* Function to close a joystick after use */
+void SDL_SYS_JoystickClose(SDL_Joystick *joystick)
+{
+	if (joystick->hwdata != NULL) {
+		/* free system specific hardware data */
+		free(joystick->hwdata);
+	}
+}
+
+/* Function to perform any system-specific joystick related cleanup */
+void SDL_SYS_JoystickQuit(void)
+{
+	return;
+}
diff --git a/src/thread/Makefile.am b/src/thread/Makefile.am
index 98194a502..c53b2f457 100644
--- a/src/thread/Makefile.am
+++ b/src/thread/Makefile.am
@@ -7,6 +7,7 @@ ARCH_SUBDIRS = $(srcdir)/generic	\
                $(srcdir)/amigaos	\
                $(srcdir)/beos		\
                $(srcdir)/bsdi		\
+               $(srcdir)/dc		\
                $(srcdir)/epoc		\
                $(srcdir)/irix		\
                $(srcdir)/linux		\
diff --git a/src/thread/dc/SDL_syscond.c b/src/thread/dc/SDL_syscond.c
new file mode 100644
index 000000000..8b888d5a0
--- /dev/null
+++ b/src/thread/dc/SDL_syscond.c
@@ -0,0 +1,223 @@
+/*
+    SDL - Simple DirectMedia Layer
+    Copyright (C) 1997, 1998, 1999, 2000, 2001, 2002  Sam Lantinga
+
+    This library is free software; you can redistribute it and/or
+    modify it under the terms of the GNU Library General Public
+    License as published by the Free Software Foundation; either
+    version 2 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
+    Library General Public License for more details.
+
+    You should have received a copy of the GNU Library General Public
+    License along with this library; if not, write to the Free
+    Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
+
+    Sam Lantinga
+    slouken@libsdl.org
+*/
+
+#ifdef SAVE_RCSID
+static char rcsid =
+ "@(#) $Id$";
+#endif
+
+/* An implementation of condition variables using semaphores and mutexes */
+/*
+   This implementation borrows heavily from the BeOS condition variable
+   implementation, written by Christopher Tate and Owen Smith.  Thanks!
+ */
+
+#include <stdio.h>
+#include <stdlib.h>
+
+#include "SDL_error.h"
+#include "SDL_thread.h"
+
+struct SDL_cond
+{
+	SDL_mutex *lock;
+	int waiting;
+	int signals;
+	SDL_sem *wait_sem;
+	SDL_sem *wait_done;
+};
+
+/* Create a condition variable */
+SDL_cond * SDL_CreateCond(void)
+{
+	SDL_cond *cond;
+
+	cond = (SDL_cond *) malloc(sizeof(SDL_cond));
+	if ( cond ) {
+		cond->lock = SDL_CreateMutex();
+		cond->wait_sem = SDL_CreateSemaphore(0);
+		cond->wait_done = SDL_CreateSemaphore(0);
+		cond->waiting = cond->signals = 0;
+		if ( ! cond->lock || ! cond->wait_sem || ! cond->wait_done ) {
+			SDL_DestroyCond(cond);
+			cond = NULL;
+		}
+	} else {
+		SDL_OutOfMemory();
+	}
+	return(cond);
+}
+
+/* Destroy a condition variable */
+void SDL_DestroyCond(SDL_cond *cond)
+{
+	if ( cond ) {
+		if ( cond->wait_sem ) {
+			SDL_DestroySemaphore(cond->wait_sem);
+		}
+		if ( cond->wait_done ) {
+			SDL_DestroySemaphore(cond->wait_done);
+		}
+		if ( cond->lock ) {
+			SDL_DestroyMutex(cond->lock);
+		}
+		free(cond);
+	}
+}
+
+/* Restart one of the threads that are waiting on the condition variable */
+int SDL_CondSignal(SDL_cond *cond)
+{
+	if ( ! cond ) {
+		SDL_SetError("Passed a NULL condition variable");
+		return -1;
+	}
+
+	/* If there are waiting threads not already signalled, then
+	   signal the condition and wait for the thread to respond.
+	*/
+	SDL_LockMutex(cond->lock);
+	if ( cond->waiting > cond->signals ) {
+		++cond->signals;
+		SDL_SemPost(cond->wait_sem);
+		SDL_UnlockMutex(cond->lock);
+		SDL_SemWait(cond->wait_done);
+	} else {
+		SDL_UnlockMutex(cond->lock);
+	}
+
+	return 0;
+}
+
+/* Restart all threads that are waiting on the condition variable */
+int SDL_CondBroadcast(SDL_cond *cond)
+{
+	if ( ! cond ) {
+		SDL_SetError("Passed a NULL condition variable");
+		return -1;
+	}
+
+	/* If there are waiting threads not already signalled, then
+	   signal the condition and wait for the thread to respond.
+	*/
+	SDL_LockMutex(cond->lock);
+	if ( cond->waiting > cond->signals ) {
+		int i, num_waiting;
+
+		num_waiting = (cond->waiting - cond->signals);
+		cond->signals = cond->waiting;
+		for ( i=0; i<num_waiting; ++i ) {
+			SDL_SemPost(cond->wait_sem);
+		}
+		/* Now all released threads are blocked here, waiting for us.
+		   Collect them all (and win fabulous prizes!) :-)
+		 */
+		SDL_UnlockMutex(cond->lock);
+		for ( i=0; i<num_waiting; ++i ) {
+			SDL_SemWait(cond->wait_done);
+		}
+	} else {
+		SDL_UnlockMutex(cond->lock);
+	}
+
+	return 0;
+}
+
+/* Wait on the condition variable for at most 'ms' milliseconds.
+   The mutex must be locked before entering this function!
+   The mutex is unlocked during the wait, and locked again after the wait.
+
+Typical use:
+
+Thread A:
+	SDL_LockMutex(lock);
+	while ( ! condition ) {
+		SDL_CondWait(cond);
+	}
+	SDL_UnlockMutex(lock);
+
+Thread B:
+	SDL_LockMutex(lock);
+	...
+	condition = true;
+	...
+	SDL_UnlockMutex(lock);
+ */
+int SDL_CondWaitTimeout(SDL_cond *cond, SDL_mutex *mutex, Uint32 ms)
+{
+	int retval;
+
+	if ( ! cond ) {
+		SDL_SetError("Passed a NULL condition variable");
+		return -1;
+	}
+
+	/* Obtain the protection mutex, and increment the number of waiters.
+	   This allows the signal mechanism to only perform a signal if there
+	   are waiting threads.
+	 */
+	SDL_LockMutex(cond->lock);
+	++cond->waiting;
+	SDL_UnlockMutex(cond->lock);
+
+	/* Unlock the mutex, as is required by condition variable semantics */
+	SDL_UnlockMutex(mutex);
+
+	/* Wait for a signal */
+	if ( ms == SDL_MUTEX_MAXWAIT ) {
+		retval = SDL_SemWait(cond->wait_sem);
+	} else {
+		retval = SDL_SemWaitTimeout(cond->wait_sem, ms);
+	}
+
+	/* Let the signaler know we have completed the wait, otherwise
+           the signaler can race ahead and get the condition semaphore
+           if we are stopped between the mutex unlock and semaphore wait,
+           giving a deadlock.  See the following URL for details:
+        http://www-classic.be.com/aboutbe/benewsletter/volume_III/Issue40.html
+	*/
+	SDL_LockMutex(cond->lock);
+	if ( cond->signals > 0 ) {
+		/* If we timed out, we need to eat a condition signal */
+		if ( retval > 0 ) {
+			SDL_SemWait(cond->wait_sem);
+		}
+		/* We always notify the signal thread that we are done */
+		SDL_SemPost(cond->wait_done);
+
+		/* Signal handshake complete */
+		--cond->signals;
+	}
+	--cond->waiting;
+	SDL_UnlockMutex(cond->lock);
+
+	/* Lock the mutex, as is required by condition variable semantics */
+	SDL_LockMutex(mutex);
+
+	return retval;
+}
+
+/* Wait on the condition variable forever */
+int SDL_CondWait(SDL_cond *cond, SDL_mutex *mutex)
+{
+	return SDL_CondWaitTimeout(cond, mutex, SDL_MUTEX_MAXWAIT);
+}
diff --git a/src/thread/dc/SDL_syscond_c.h b/src/thread/dc/SDL_syscond_c.h
new file mode 100644
index 000000000..33585baf2
--- /dev/null
+++ b/src/thread/dc/SDL_syscond_c.h
@@ -0,0 +1,27 @@
+/*
+    SDL - Simple DirectMedia Layer
+    Copyright (C) 1997, 1998, 1999, 2000, 2001, 2002  Sam Lantinga
+
+    This library is free software; you can redistribute it and/or
+    modify it under the terms of the GNU Library General Public
+    License as published by the Free Software Foundation; either
+    version 2 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
+    Library General Public License for more details.
+
+    You should have received a copy of the GNU Library General Public
+    License along with this library; if not, write to the Free
+    Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
+
+    Sam Lantinga
+    slouken@libsdl.org
+*/
+
+#ifdef SAVE_RCSID
+static char rcsid =
+ "@(#) $Id$";
+#endif
+
diff --git a/src/thread/dc/SDL_sysmutex.c b/src/thread/dc/SDL_sysmutex.c
new file mode 100644
index 000000000..6ffec6c61
--- /dev/null
+++ b/src/thread/dc/SDL_sysmutex.c
@@ -0,0 +1,135 @@
+/*
+    SDL - Simple DirectMedia Layer
+    Copyright (C) 1997, 1998, 1999, 2000, 2001, 2002  Sam Lantinga
+
+    This library is free software; you can redistribute it and/or
+    modify it under the terms of the GNU Library General Public
+    License as published by the Free Software Foundation; either
+    version 2 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
+    Library General Public License for more details.
+
+    You should have received a copy of the GNU Library General Public
+    License along with this library; if not, write to the Free
+    Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
+
+    BERO
+    bero@geocities.co.jp
+
+    based on generic/SDL_sysmutex.c
+
+    Sam Lantinga
+    slouken@libsdl.org
+*/
+
+#ifdef SAVE_RCSID
+static char rcsid =
+ "@(#) $Id$";
+#endif
+
+/* An implementation of mutexes using semaphores */
+
+#include <stdio.h>
+#include <stdlib.h>
+
+#include "SDL_error.h"
+#include "SDL_thread.h"
+#include "SDL_systhread_c.h"
+
+#include <arch/spinlock.h>
+
+struct SDL_mutex {
+	int recursive;
+	Uint32 owner;
+	spinlock_t mutex;
+};
+
+/* Create a mutex */
+SDL_mutex *SDL_CreateMutex(void)
+{
+	SDL_mutex *mutex;
+
+	/* Allocate mutex memory */
+	mutex = (SDL_mutex *)malloc(sizeof(*mutex));
+	if ( mutex ) {
+		spinlock_init(&mutex->mutex);
+		mutex->recursive = 0;
+		mutex->owner = 0;
+	} else {
+		SDL_OutOfMemory();
+	}
+	return mutex;
+}
+
+/* Free the mutex */
+void SDL_DestroyMutex(SDL_mutex *mutex)
+{
+	if ( mutex ) {
+		free(mutex);
+	}
+}
+
+/* Lock the semaphore */
+int SDL_mutexP(SDL_mutex *mutex)
+{
+#ifdef DISABLE_THREADS
+	return 0;
+#else
+	Uint32 this_thread;
+
+	if ( mutex == NULL ) {
+		SDL_SetError("Passed a NULL mutex");
+		return -1;
+	}
+
+	this_thread = SDL_ThreadID();
+	if ( mutex->owner == this_thread ) {
+		++mutex->recursive;
+	} else {
+		/* The order of operations is important.
+		   We set the locking thread id after we obtain the lock
+		   so unlocks from other threads will fail.
+		*/
+		spinlock_lock(&mutex->mutex);
+		mutex->owner = this_thread;
+		mutex->recursive = 0;
+	}
+
+	return 0;
+#endif /* DISABLE_THREADS */
+}
+
+/* Unlock the mutex */
+int SDL_mutexV(SDL_mutex *mutex)
+{
+#ifdef DISABLE_THREADS
+	return 0;
+#else
+	if ( mutex == NULL ) {
+		SDL_SetError("Passed a NULL mutex");
+		return -1;
+	}
+
+	/* If we don't own the mutex, we can't unlock it */
+	if ( SDL_ThreadID() != mutex->owner ) {
+		SDL_SetError("mutex not owned by this thread");
+		return -1;
+	}
+
+	if ( mutex->recursive ) {
+		--mutex->recursive;
+	} else {
+		/* The order of operations is important.
+		   First reset the owner so another thread doesn't lock
+		   the mutex and set the ownership before we reset it,
+		   then release the lock semaphore.
+		 */
+		mutex->owner = 0;
+		spinlock_unlock(&mutex->mutex);
+	}
+	return 0;
+#endif /* DISABLE_THREADS */
+}
diff --git a/src/thread/dc/SDL_sysmutex_c.h b/src/thread/dc/SDL_sysmutex_c.h
new file mode 100644
index 000000000..33585baf2
--- /dev/null
+++ b/src/thread/dc/SDL_sysmutex_c.h
@@ -0,0 +1,27 @@
+/*
+    SDL - Simple DirectMedia Layer
+    Copyright (C) 1997, 1998, 1999, 2000, 2001, 2002  Sam Lantinga
+
+    This library is free software; you can redistribute it and/or
+    modify it under the terms of the GNU Library General Public
+    License as published by the Free Software Foundation; either
+    version 2 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
+    Library General Public License for more details.
+
+    You should have received a copy of the GNU Library General Public
+    License along with this library; if not, write to the Free
+    Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
+
+    Sam Lantinga
+    slouken@libsdl.org
+*/
+
+#ifdef SAVE_RCSID
+static char rcsid =
+ "@(#) $Id$";
+#endif
+
diff --git a/src/thread/dc/SDL_syssem.c b/src/thread/dc/SDL_syssem.c
new file mode 100644
index 000000000..bd9f97b18
--- /dev/null
+++ b/src/thread/dc/SDL_syssem.c
@@ -0,0 +1,180 @@
+/*
+    SDL - Simple DirectMedia Layer
+    Copyright (C) 1997, 1998, 1999, 2000, 2001, 2002  Sam Lantinga
+
+    This library is free software; you can redistribute it and/or
+    modify it under the terms of the GNU Library General Public
+    License as published by the Free Software Foundation; either
+    version 2 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
+    Library General Public License for more details.
+
+    You should have received a copy of the GNU Library General Public
+    License along with this library; if not, write to the Free
+    Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
+
+    BERO
+    bero@geocities.co.jp
+
+    based on generic/SDL_syssem.c
+
+    Sam Lantinga
+    slouken@libsdl.org
+*/
+
+#ifdef SAVE_RCSID
+static char rcsid =
+ "@(#) $Id$";
+#endif
+
+/* An implementation of semaphores using mutexes and condition variables */
+
+#include <stdlib.h>
+
+#include "SDL_error.h"
+#include "SDL_timer.h"
+#include "SDL_thread.h"
+#include "SDL_systhread_c.h"
+
+
+#ifdef DISABLE_THREADS
+
+SDL_sem *SDL_CreateSemaphore(Uint32 initial_value)
+{
+	SDL_SetError("SDL not configured with thread support");
+	return (SDL_sem *)0;
+}
+
+void SDL_DestroySemaphore(SDL_sem *sem)
+{
+	return;
+}
+
+int SDL_SemTryWait(SDL_sem *sem)
+{
+	SDL_SetError("SDL not configured with thread support");
+	return -1;
+}
+
+int SDL_SemWaitTimeout(SDL_sem *sem, Uint32 timeout)
+{
+	SDL_SetError("SDL not configured with thread support");
+	return -1;
+}
+
+int SDL_SemWait(SDL_sem *sem)
+{
+	SDL_SetError("SDL not configured with thread support");
+	return -1;
+}
+
+Uint32 SDL_SemValue(SDL_sem *sem)
+{
+	return 0;
+}
+
+int SDL_SemPost(SDL_sem *sem)
+{
+	SDL_SetError("SDL not configured with thread support");
+	return -1;
+}
+
+#else
+
+#include <kos/sem.h>
+
+struct SDL_semaphore
+{
+	semaphore_t sem;
+};
+
+SDL_sem *SDL_CreateSemaphore(Uint32 initial_value)
+{
+	return (SDL_sem *)sem_create(initial_value);
+}
+
+/* WARNING:
+   You cannot call this function when another thread is using the semaphore.
+*/
+void SDL_DestroySemaphore(SDL_sem *sem)
+{
+	if ( ! sem ) {
+		SDL_SetError("Passed a NULL semaphore");
+		return;
+	}
+
+	sem_destroy(&sem->sem);
+}
+
+int SDL_SemTryWait(SDL_sem *sem)
+{
+	int retval;
+
+	if ( ! sem ) {
+		SDL_SetError("Passed a NULL semaphore");
+		return -1;
+	}
+
+	retval = sem_trywait(&sem->sem);
+	if (retval==0) return 0;
+	else return SDL_MUTEX_TIMEDOUT;
+
+	return retval;
+}
+
+int SDL_SemWaitTimeout(SDL_sem *sem, Uint32 timeout)
+{
+	int retval;
+
+	if ( ! sem ) {
+		SDL_SetError("Passed a NULL semaphore");
+		return -1;
+	}
+
+	/* A timeout of 0 is an easy case */
+	if ( timeout == 0 ) {
+		return SDL_SemTryWait(sem);
+	}
+
+	retval = sem_wait_timed(&sem->sem,timeout);
+	if (retval==-1) retval= SDL_MUTEX_TIMEDOUT;
+
+	return retval;
+}
+
+int SDL_SemWait(SDL_sem *sem)
+{
+	if ( ! sem ) {
+		SDL_SetError("Passed a NULL semaphore");
+		return -1;
+	}
+
+	sem_wait(&sem->sem);
+	return 0;
+}
+
+Uint32 SDL_SemValue(SDL_sem *sem)
+{
+	if ( ! sem ) {
+		SDL_SetError("Passed a NULL semaphore");
+		return -1;
+	}
+
+	return sem_count(&sem->sem);
+}
+
+int SDL_SemPost(SDL_sem *sem)
+{
+	if ( ! sem ) {
+		SDL_SetError("Passed a NULL semaphore");
+		return -1;
+	}
+
+	sem_signal(&sem->sem);
+	return 0;
+}
+
+#endif /* DISABLE_THREADS */
diff --git a/src/thread/dc/SDL_syssem_c.h b/src/thread/dc/SDL_syssem_c.h
new file mode 100644
index 000000000..33585baf2
--- /dev/null
+++ b/src/thread/dc/SDL_syssem_c.h
@@ -0,0 +1,27 @@
+/*
+    SDL - Simple DirectMedia Layer
+    Copyright (C) 1997, 1998, 1999, 2000, 2001, 2002  Sam Lantinga
+
+    This library is free software; you can redistribute it and/or
+    modify it under the terms of the GNU Library General Public
+    License as published by the Free Software Foundation; either
+    version 2 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
+    Library General Public License for more details.
+
+    You should have received a copy of the GNU Library General Public
+    License along with this library; if not, write to the Free
+    Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
+
+    Sam Lantinga
+    slouken@libsdl.org
+*/
+
+#ifdef SAVE_RCSID
+static char rcsid =
+ "@(#) $Id$";
+#endif
+
diff --git a/src/thread/dc/SDL_systhread.c b/src/thread/dc/SDL_systhread.c
new file mode 100644
index 000000000..4395f799e
--- /dev/null
+++ b/src/thread/dc/SDL_systhread.c
@@ -0,0 +1,98 @@
+/*
+    SDL - Simple DirectMedia Layer
+    Copyright (C) 1997, 1998, 1999, 2000, 2001, 2002  Sam Lantinga
+
+    This library is free software; you can redistribute it and/or
+    modify it under the terms of the GNU Library General Public
+    License as published by the Free Software Foundation; either
+    version 2 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
+    Library General Public License for more details.
+
+    You should have received a copy of the GNU Library General Public
+    License along with this library; if not, write to the Free
+    Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
+
+    BERO
+    bero@geocities.co.jp
+
+    based on generic/SDL_thread.c
+
+    Sam Lantinga
+    slouken@libsdl.org
+*/
+
+#ifdef SAVE_RCSID
+static char rcsid =
+ "@(#) $Id$";
+#endif
+
+/* Thread management routines for SDL */
+
+#include "SDL_error.h"
+#include "SDL_thread.h"
+#include "SDL_systhread.h"
+
+#include <kos/thread.h>
+
+#ifdef	DISABLE_THREADS
+int SDL_SYS_CreateThread(SDL_Thread *thread, void *args)
+{
+	SDL_SetError("Threads are not supported on this platform");
+	return(-1);
+}
+
+void SDL_SYS_SetupThread(void)
+{
+	return;
+}
+
+Uint32 SDL_ThreadID(void)
+{
+	return(0);
+}
+
+void SDL_SYS_WaitThread(SDL_Thread *thread)
+{
+	return;
+}
+
+void SDL_SYS_KillThread(SDL_Thread *thread)
+{
+	return;
+}
+
+#else
+int SDL_SYS_CreateThread(SDL_Thread *thread, void *args)
+{
+	thread->handle = thd_create(SDL_RunThread,args);
+	if (thread->handle == NULL) {
+		SDL_SetError("Not enough resources to create thread");
+		return(-1);
+	}
+	return(0);
+}
+
+void SDL_SYS_SetupThread(void)
+{
+	return;
+}
+
+Uint32 SDL_ThreadID(void)
+{
+	return (Uint32)thd_get_current();
+}
+
+void SDL_SYS_WaitThread(SDL_Thread *thread)
+{
+	thd_wait(thread->handle);
+}
+
+void SDL_SYS_KillThread(SDL_Thread *thread)
+{
+	thd_destroy(thread->handle);
+}
+#endif
diff --git a/src/thread/dc/SDL_systhread_c.h b/src/thread/dc/SDL_systhread_c.h
new file mode 100644
index 000000000..30576399a
--- /dev/null
+++ b/src/thread/dc/SDL_systhread_c.h
@@ -0,0 +1,29 @@
+/*
+    SDL - Simple DirectMedia Layer
+    Copyright (C) 1997, 1998, 1999, 2000, 2001, 2002  Sam Lantinga
+
+    This library is free software; you can redistribute it and/or
+    modify it under the terms of the GNU Library General Public
+    License as published by the Free Software Foundation; either
+    version 2 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
+    Library General Public License for more details.
+
+    You should have received a copy of the GNU Library General Public
+    License along with this library; if not, write to the Free
+    Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
+
+    Sam Lantinga
+    slouken@libsdl.org
+*/
+
+/* Stub until we implement threads on this platform */
+typedef struct kthread* SYS_ThreadHandle;
+/*
+#ifndef DISABLE_THREADS
+#define DISABLE_THREADS
+#endif
+*/
diff --git a/src/timer/Makefile.am b/src/timer/Makefile.am
index 473710cb7..01cab757a 100644
--- a/src/timer/Makefile.am
+++ b/src/timer/Makefile.am
@@ -5,6 +5,7 @@ noinst_LTLIBRARIES = libtimer.la
 
 ARCH_SUBDIRS = $(srcdir)/amigaos \
                $(srcdir)/beos \
+               $(srcdir)/dc \
                $(srcdir)/epoc \
                $(srcdir)/linux \
                $(srcdir)/macos \
diff --git a/src/timer/dc/SDL_systimer.c b/src/timer/dc/SDL_systimer.c
new file mode 100644
index 000000000..69b3321bf
--- /dev/null
+++ b/src/timer/dc/SDL_systimer.c
@@ -0,0 +1,106 @@
+/*
+    SDL - Simple DirectMedia Layer
+    Copyright (C) 1997, 1998, 1999, 2000, 2001, 2002  Sam Lantinga
+
+    This library is free software; you can redistribute it and/or
+    modify it under the terms of the GNU Library General Public
+    License as published by the Free Software Foundation; either
+    version 2 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
+    Library General Public License for more details.
+
+    You should have received a copy of the GNU Library General Public
+    License along with this library; if not, write to the Free
+    Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
+
+    BERO
+    bero@geocities.co.jp
+
+    based on win32/SDL_systimer.c
+
+    Sam Lantinga
+    slouken@libsdl.org
+*/
+
+#ifdef SAVE_RCSID
+static char rcsid =
+ "@(#) $Id$";
+#endif
+
+#include <kos.h>
+
+#include "SDL_thread.h"
+#include "SDL_timer.h"
+#include "SDL_error.h"
+#include "SDL_timer_c.h"
+
+static unsigned start;
+
+/* 
+	jif =  ms * HZ /1000
+	ms  = jif * 1000/HZ
+*/
+
+void SDL_StartTicks(void)
+{
+	/* Set first ticks value */
+	start = jiffies;
+}
+
+Uint32 SDL_GetTicks(void)
+{
+	return((jiffies-start)*1000/HZ);
+}
+
+void SDL_Delay(Uint32 ms)
+{
+	thd_sleep(ms);
+}
+
+/* Data to handle a single periodic alarm */
+static int timer_alive = 0;
+static SDL_Thread *timer = NULL;
+
+static int RunTimer(void *unused)
+{
+	while ( timer_alive ) {
+		if ( SDL_timer_running ) {
+			SDL_ThreadedTimerCheck();
+		}
+		SDL_Delay(10);
+	}
+	return(0);
+}
+
+/* This is only called if the event thread is not running */
+int SDL_SYS_TimerInit(void)
+{
+	timer_alive = 1;
+	timer = SDL_CreateThread(RunTimer, NULL);
+	if ( timer == NULL )
+		return(-1);
+	return(SDL_SetTimerThreaded(1));
+}
+
+void SDL_SYS_TimerQuit(void)
+{
+	timer_alive = 0;
+	if ( timer ) {
+		SDL_WaitThread(timer, NULL);
+		timer = NULL;
+	}
+}
+
+int SDL_SYS_StartTimer(void)
+{
+	SDL_SetError("Internal logic error: DC uses threaded timer");
+	return(-1);
+}
+
+void SDL_SYS_StopTimer(void)
+{
+	return;
+}
diff --git a/src/video/Makefile.am b/src/video/Makefile.am
index 72528fb2c..73f3b27c3 100644
--- a/src/video/Makefile.am
+++ b/src/video/Makefile.am
@@ -9,7 +9,7 @@ DIST_SUBDIRS = dummy x11 dga nanox fbcon directfb vgl svga ggi aalib \
                wincommon windib windx5 \
                maccommon macdsp macrom quartz \
                bwindow ps2gs photon cybergfx epoc picogui \
-               ataricommon xbios gem XFree86
+               ataricommon xbios gem dc XFree86
 
 DRIVERS = @VIDEO_DRIVERS@
 
diff --git a/src/video/SDL_sysvideo.h b/src/video/SDL_sysvideo.h
index a325ae5d5..566341614 100644
--- a/src/video/SDL_sysvideo.h
+++ b/src/video/SDL_sysvideo.h
@@ -406,6 +406,9 @@ extern VideoBootStrap Qtopia_bootstrap;
 #ifdef ENABLE_PICOGUI
 extern VideoBootStrap PG_bootstrap;
 #endif
+#ifdef ENABLE_DC
+extern VideoBootStrap DC_bootstrap;
+#endif
 /* This is the current video device */
 extern SDL_VideoDevice *current_video;
 
diff --git a/src/video/SDL_video.c b/src/video/SDL_video.c
index c09d84cb4..5aa327e85 100644
--- a/src/video/SDL_video.c
+++ b/src/video/SDL_video.c
@@ -116,6 +116,9 @@ static VideoBootStrap *bootstrap[] = {
 #endif
 #ifdef ENABLE_PICOGUI
 	&PG_bootstrap,
+#endif
+#ifdef ENABLE_DC
+	&DC_bootstrap,
 #endif
 	NULL
 };
diff --git a/src/video/dc/.cvsignore b/src/video/dc/.cvsignore
new file mode 100644
index 000000000..899d53557
--- /dev/null
+++ b/src/video/dc/.cvsignore
@@ -0,0 +1,6 @@
+Makefile.in
+Makefile
+.libs
+*.o
+*.lo
+*.la
diff --git a/src/video/dc/Makefile.am b/src/video/dc/Makefile.am
new file mode 100644
index 000000000..040a67a63
--- /dev/null
+++ b/src/video/dc/Makefile.am
@@ -0,0 +1,14 @@
+
+## Makefile.am for SDL using the Dreamcast video driver
+
+noinst_LTLIBRARIES = libvideo_dc.la
+libvideo_dc_la_SOURCES = $(SRCS)
+
+# The SDL Dreamcast video driver sources
+SRCS = 				\
+	SDL_dcevents.c		\
+	SDL_dcevents_c.h	\
+	SDL_dcmouse.c		\
+	SDL_dcmouse_c.h		\
+	SDL_dcvideo.c		\
+	SDL_dcvideo.h
diff --git a/src/video/dc/SDL_dcevents.c b/src/video/dc/SDL_dcevents.c
new file mode 100644
index 000000000..125d06e5d
--- /dev/null
+++ b/src/video/dc/SDL_dcevents.c
@@ -0,0 +1,164 @@
+/*
+    SDL - Simple DirectMedia Layer
+    Copyright (C) 1997, 1998, 1999, 2000, 2001, 2002  Sam Lantinga
+
+    This library is free software; you can redistribute it and/or
+    modify it under the terms of the GNU Library General Public
+    License as published by the Free Software Foundation; either
+    version 2 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
+    Library General Public License for more details.
+
+    You should have received a copy of the GNU Library General Public
+    License along with this library; if not, write to the Free
+    Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
+
+    BERO
+    bero@geocities.co.jp
+
+    based on SDL_nullevents.c by
+
+    Sam Lantinga
+    slouken@libsdl.org
+*/
+
+#ifdef SAVE_RCSID
+static char rcsid =
+ "@(#) $Id$";
+#endif
+
+/* Being a null driver, there's no event stream. We just define stubs for
+   most of the API. */
+
+#include "SDL.h"
+#include "SDL_sysevents.h"
+#include "SDL_events_c.h"
+#include "SDL_dcvideo.h"
+#include "SDL_dcevents_c.h"
+
+#include <dc/maple.h>
+#include <dc/maple/mouse.h>
+#include <dc/maple/keyboard.h>
+
+const static unsigned short sdl_key[]= {
+	/*0*/	0, 0, 0, 0, 'a', 'b', 'c', 'd', 'e', 'f', 'g', 'h', 'i',
+		'j', 'k', 'l', 'm', 'n', 'o', 'p', 'q', 'r', 's', 't',
+		'u', 'v', 'w', 'x', 'y', 'z',
+	/*1e*/	'1', '2', '3', '4', '5', '6', '7', '8', '9', '0',
+	/*28*/	SDLK_RETURN, SDLK_ESCAPE, SDLK_BACKSPACE, SDLK_TAB, SDLK_SPACE, SDLK_MINUS, SDLK_PLUS, SDLK_LEFTBRACKET, 
+	SDLK_RIGHTBRACKET, SDLK_BACKSLASH , 0, SDLK_SEMICOLON, SDLK_QUOTE,
+	/*35*/	'~', SDLK_COMMA, SDLK_PERIOD, SDLK_SLASH, SDLK_CAPSLOCK, 
+	SDLK_F1, SDLK_F2, SDLK_F3, SDLK_F4, SDLK_F5, SDLK_F6, SDLK_F7, SDLK_F8, SDLK_F9, SDLK_F10, SDLK_F11, SDLK_F12,
+	/*46*/	SDLK_PRINT, SDLK_SCROLLOCK, SDLK_PAUSE, SDLK_INSERT, SDLK_HOME, SDLK_PAGEUP, SDLK_DELETE, SDLK_END, SDLK_PAGEDOWN, SDLK_RIGHT, SDLK_LEFT, SDLK_DOWN, SDLK_UP,
+	/*53*/	SDLK_NUMLOCK, SDLK_KP_DIVIDE, SDLK_KP_MULTIPLY, SDLK_KP_MINUS, SDLK_KP_PLUS, SDLK_KP_ENTER, 
+	SDLK_KP1, SDLK_KP2, SDLK_KP3, SDLK_KP4, SDLK_KP5, SDLK_KP6,
+	/*5f*/	SDLK_KP7, SDLK_KP8, SDLK_KP9, SDLK_KP0, SDLK_KP_PERIOD, 0 /* S3 */
+};
+
+const static unsigned short sdl_shift[] = {
+	SDLK_LCTRL,SDLK_LSHIFT,SDLK_LALT,0 /* S1 */,
+	SDLK_RCTRL,SDLK_RSHIFT,SDLK_RALT,0 /* S2 */,
+};
+
+#define	MOUSE_WHEELUP 	(1<<4)
+#define	MOUSE_WHEELDOWN	(1<<5)
+
+static void mouse_update(void)
+{
+const	static char sdl_mousebtn[] = {
+	MOUSE_LEFTBUTTON,
+	MOUSE_RIGHTBUTTON,
+	MOUSE_SIDEBUTTON,
+	MOUSE_WHEELUP,
+	MOUSE_WHEELDOWN
+};
+
+	uint8 addr;
+	mouse_cond_t	cond;
+
+	static int prev_buttons;
+	int buttons,changed;
+	int i;
+
+	if ((addr = maple_first_mouse())==0 || mouse_get_cond(addr, &cond)<0) return;
+
+	buttons = cond.buttons^0xff;
+	if (cond.dz<0) buttons|=MOUSE_WHEELUP;
+	if (cond.dz>0) buttons|=MOUSE_WHEELDOWN;
+
+	if (cond.dx||cond.dy) SDL_PrivateMouseMotion(0,1,cond.dx,cond.dy);
+
+	changed = buttons^prev_buttons;
+	for(i=0;i<sizeof(sdl_mousebtn);i++) {
+		if (changed & sdl_mousebtn[i]) {
+			SDL_PrivateMouseButton((buttons & sdl_mousebtn[i])?SDL_PRESSED:SDL_RELEASED,i,0,0);
+		}
+	}
+	prev_buttons = buttons;
+}
+
+static void keyboard_update(void)
+{
+	static kbd_state_t	old_state;
+	static uint8 old_addr;
+
+	kbd_state_t	*state;
+	uint8	addr;
+	int	port,unit;
+
+	int shiftkeys;
+	SDL_keysym keysym;
+
+	int i;
+
+	addr = maple_first_kb();
+
+	if (addr==0) return;
+
+	if (addr!=old_addr) {
+		old_addr = addr;
+		memset(&old_state,0,sizeof(old_state));
+	}
+
+	maple_raddr(addr,&port,&unit);
+
+	state = kbd_get_state(port,unit);
+	if (!state) return;
+
+	shiftkeys = state->shift_keys ^ old_state.shift_keys;
+	for(i=0;i<sizeof(sdl_shift);i++) {
+		if ((shiftkeys>>i)&1) {
+			keysym.sym = sdl_shift[i];
+			SDL_PrivateKeyboard(((state->shift_keys>>i)&1)?SDL_PRESSED:SDL_RELEASED,&keysym);
+		}
+	}
+
+	for(i=0;i<sizeof(sdl_key);i++) {
+		if (state->matrix[i]!=old_state.matrix[i]) {
+			int key = sdl_key[i];
+			if (key) {
+				keysym.sym = key;
+				SDL_PrivateKeyboard(state->matrix[i]?SDL_PRESSED:SDL_RELEASED,&keysym);
+			}
+		}
+	}
+
+	old_state = *state;
+}
+
+void DC_PumpEvents(_THIS)
+{
+	keyboard_update();
+	mouse_update();
+}
+
+void DC_InitOSKeymap(_THIS)
+{
+	/* do nothing. */
+}
+
+/* end of SDL_dcevents.c ... */
+
diff --git a/src/video/dc/SDL_dcevents_c.h b/src/video/dc/SDL_dcevents_c.h
new file mode 100644
index 000000000..ea91fcb41
--- /dev/null
+++ b/src/video/dc/SDL_dcevents_c.h
@@ -0,0 +1,42 @@
+/*
+    SDL - Simple DirectMedia Layer
+    Copyright (C) 1997, 1998, 1999, 2000, 2001, 2002  Sam Lantinga
+
+    This library is free software; you can redistribute it and/or
+    modify it under the terms of the GNU Library General Public
+    License as published by the Free Software Foundation; either
+    version 2 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
+    Library General Public License for more details.
+
+    You should have received a copy of the GNU Library General Public
+    License along with this library; if not, write to the Free
+    Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
+
+    BERO
+    bero@geocities.co.jp
+
+    based on SDL_nullevents.h by
+
+    Sam Lantinga
+    slouken@libsdl.org
+*/
+
+#ifdef SAVE_RCSID
+static char rcsid =
+ "@(#) $Id$";
+#endif
+
+#include "SDL_dcvideo.h"
+
+/* Variables and functions exported by SDL_sysevents.c to other parts 
+   of the native video subsystem (SDL_sysvideo.c)
+*/
+extern void DC_InitOSKeymap(_THIS);
+extern void DC_PumpEvents(_THIS);
+
+/* end of SDL_dcevents_c.h ... */
+
diff --git a/src/video/dc/SDL_dcmouse.c b/src/video/dc/SDL_dcmouse.c
new file mode 100644
index 000000000..728384a40
--- /dev/null
+++ b/src/video/dc/SDL_dcmouse.c
@@ -0,0 +1,45 @@
+/*
+    SDL - Simple DirectMedia Layer
+    Copyright (C) 1997, 1998, 1999, 2000, 2001, 2002  Sam Lantinga
+
+    This library is free software; you can redistribute it and/or
+    modify it under the terms of the GNU Library General Public
+    License as published by the Free Software Foundation; either
+    version 2 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
+    Library General Public License for more details.
+
+    You should have received a copy of the GNU Library General Public
+    License along with this library; if not, write to the Free
+    Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
+
+    BERO
+    bero@geocities.co.jp
+
+    based on SDL_nullvideo.h by
+
+    Sam Lantinga
+    slouken@libsdl.org
+*/
+
+#ifdef SAVE_RCSID
+static char rcsid =
+ "@(#) $Id$";
+#endif
+
+#include <stdio.h>
+
+#include "SDL_error.h"
+#include "SDL_mouse.h"
+#include "SDL_events_c.h"
+
+#include "SDL_dcmouse_c.h"
+
+
+/* The implementation dependent data for the window manager cursor */
+struct WMcursor {
+	int unused;
+};
diff --git a/src/video/dc/SDL_dcmouse_c.h b/src/video/dc/SDL_dcmouse_c.h
new file mode 100644
index 000000000..72c31275b
--- /dev/null
+++ b/src/video/dc/SDL_dcmouse_c.h
@@ -0,0 +1,35 @@
+/*
+    SDL - Simple DirectMedia Layer
+    Copyright (C) 1997, 1998, 1999, 2000, 2001, 2002  Sam Lantinga
+
+    This library is free software; you can redistribute it and/or
+    modify it under the terms of the GNU Library General Public
+    License as published by the Free Software Foundation; either
+    version 2 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
+    Library General Public License for more details.
+
+    You should have received a copy of the GNU Library General Public
+    License along with this library; if not, write to the Free
+    Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
+
+    BERO
+    bero@geocities.co.jp
+
+    based on SDL_nullmouse.h by
+
+    Sam Lantinga
+    slouken@libsdl.org
+*/
+
+#ifdef SAVE_RCSID
+static char rcsid =
+ "@(#) $Id$";
+#endif
+
+#include "SDL_dcvideo.h"
+
+/* Functions to be exported */
diff --git a/src/video/dc/SDL_dcvideo.c b/src/video/dc/SDL_dcvideo.c
new file mode 100644
index 000000000..d26d744ba
--- /dev/null
+++ b/src/video/dc/SDL_dcvideo.c
@@ -0,0 +1,477 @@
+/*
+    SDL - Simple DirectMedia Layer
+    Copyright (C) 1997, 1998, 1999, 2000, 2001, 2002  Sam Lantinga
+
+    This library is free software; you can redistribute it and/or
+    modify it under the terms of the GNU Library General Public
+    License as published by the Free Software Foundation; either
+    version 2 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
+    Library General Public License for more details.
+
+    You should have received a copy of the GNU Library General Public
+    License along with this library; if not, write to the Free
+    Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
+
+    BERO
+    bero@geocities.co.jp
+
+    based on SDL_nullvideo.c by
+
+    Sam Lantinga
+    slouken@libsdl.org
+*/
+
+#ifdef SAVE_RCSID
+static char rcsid =
+ "@(#) $Id$";
+#endif
+
+/* 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.
+ *
+ * Initial work by Ryan C. Gordon (icculus@linuxgames.com). A good portion
+ *  of this was cut-and-pasted from Stephane Peter's work in the AAlib
+ *  SDL video driver.  Renamed to "DC" by Sam Lantinga.
+ */
+
+#include <stdio.h>
+#include <stdlib.h>
+#include <string.h>
+
+#include "SDL.h"
+#include "SDL_error.h"
+#include "SDL_video.h"
+#include "SDL_mouse.h"
+#include "SDL_sysvideo.h"
+#include "SDL_pixels_c.h"
+#include "SDL_events_c.h"
+
+#include "SDL_dcvideo.h"
+#include "SDL_dcevents_c.h"
+#include "SDL_dcmouse_c.h"
+
+#include <dc/video.h>
+#include <dc/pvr.h>
+
+#ifdef HAVE_OPENGL
+#include <GL/gl.h>
+#endif
+
+
+/* Initialization/Query functions */
+static int DC_VideoInit(_THIS, SDL_PixelFormat *vformat);
+static SDL_Rect **DC_ListModes(_THIS, SDL_PixelFormat *format, Uint32 flags);
+static SDL_Surface *DC_SetVideoMode(_THIS, SDL_Surface *current, int width, int height, int bpp, Uint32 flags);
+static int DC_SetColors(_THIS, int firstcolor, int ncolors, SDL_Color *colors);
+static void DC_VideoQuit(_THIS);
+
+/* Hardware surface functions */
+static int DC_AllocHWSurface(_THIS, SDL_Surface *surface);
+static int DC_LockHWSurface(_THIS, SDL_Surface *surface);
+static void DC_UnlockHWSurface(_THIS, SDL_Surface *surface);
+static void DC_FreeHWSurface(_THIS, SDL_Surface *surface);
+static int DC_FlipHWSurface(_THIS, SDL_Surface *surface);
+
+/* etc. */
+static void DC_UpdateRects(_THIS, int numrects, SDL_Rect *rects);
+
+/* OpenGL */
+static void *DC_GL_GetProcAddress(_THIS, const char *proc);
+static int DC_GL_LoadLibrary(_THIS, const char *path);
+static int DC_GL_GetAttribute(_THIS, SDL_GLattr attrib, int* value);
+static void DC_GL_SwapBuffers(_THIS);
+
+/* DC driver bootstrap functions */
+
+static int DC_Available(void)
+{
+	return 1;
+}
+
+static void DC_DeleteDevice(SDL_VideoDevice *device)
+{
+	free(device->hidden);
+	free(device);
+}
+
+static SDL_VideoDevice *DC_CreateDevice(int devindex)
+{
+	SDL_VideoDevice *device;
+
+	/* Initialize all variables that we clean on shutdown */
+	device = (SDL_VideoDevice *)malloc(sizeof(SDL_VideoDevice));
+	if ( device ) {
+		memset(device, 0, (sizeof *device));
+		device->hidden = (struct SDL_PrivateVideoData *)
+				malloc((sizeof *device->hidden));
+	}
+	if ( (device == NULL) || (device->hidden == NULL) ) {
+		SDL_OutOfMemory();
+		if ( device ) {
+			free(device);
+		}
+		return(0);
+	}
+	memset(device->hidden, 0, (sizeof *device->hidden));
+
+	/* Set the function pointers */
+	device->VideoInit = DC_VideoInit;
+	device->ListModes = DC_ListModes;
+	device->SetVideoMode = DC_SetVideoMode;
+	device->CreateYUVOverlay = NULL;
+	device->SetColors = DC_SetColors;
+	device->UpdateRects = DC_UpdateRects;
+	device->VideoQuit = DC_VideoQuit;
+	device->AllocHWSurface = DC_AllocHWSurface;
+	device->CheckHWBlit = NULL;
+	device->FillHWRect = NULL;
+	device->SetHWColorKey = NULL;
+	device->SetHWAlpha = NULL;
+	device->LockHWSurface = DC_LockHWSurface;
+	device->UnlockHWSurface = DC_UnlockHWSurface;
+	device->FlipHWSurface = DC_FlipHWSurface;
+	device->FreeHWSurface = DC_FreeHWSurface;
+#ifdef	HAVE_OPENGL
+	device->GL_LoadLibrary = DC_GL_LoadLibrary;
+	device->GL_GetProcAddress = DC_GL_GetProcAddress;
+	device->GL_GetAttribute = DC_GL_GetAttribute;
+	device->GL_MakeCurrent = NULL;
+	device->GL_SwapBuffers = DC_GL_SwapBuffers;
+#endif
+	device->SetCaption = NULL;
+	device->SetIcon = NULL;
+	device->IconifyWindow = NULL;
+	device->GrabInput = NULL;
+	device->GetWMInfo = NULL;
+	device->InitOSKeymap = DC_InitOSKeymap;
+	device->PumpEvents = DC_PumpEvents;
+
+	device->free = DC_DeleteDevice;
+
+	return device;
+}
+
+VideoBootStrap DC_bootstrap = {
+	"dcvideo", "Dreamcast Video",
+	DC_Available, DC_CreateDevice
+};
+
+
+int DC_VideoInit(_THIS, SDL_PixelFormat *vformat)
+{
+	/* Determine the screen depth (use default 8-bit depth) */
+	/* we change this during the SDL_SetVideoMode implementation... */
+	vformat->BitsPerPixel = 16;
+	vformat->Rmask = 0x0000f800;
+	vformat->Gmask = 0x000007e0;
+	vformat->Bmask = 0x0000001f;
+
+	/* We're done! */
+	return(0);
+}
+
+const static SDL_Rect
+	RECT_800x600 = {0,0,800,600},
+	RECT_640x480 = {0,0,640,480},
+	RECT_320x240 = {0,0,320,240};
+const static SDL_Rect *vid_modes[] = {
+	&RECT_800x600,
+	&RECT_640x480,
+	&RECT_320x240,
+	NULL
+};
+
+SDL_Rect **DC_ListModes(_THIS, SDL_PixelFormat *format, Uint32 flags)
+{
+	switch(format->BitsPerPixel) {
+	case 15:
+	case 16:
+		return &vid_modes;
+	case 32:
+		if (!(flags & SDL_OPENGL))
+		return &vid_modes;
+	default:
+		return NULL;
+	}
+//	return (SDL_Rect **) -1;
+}
+
+pvr_init_params_t params = {
+        /* Enable opaque and translucent polygons with size 16 */
+        { PVR_BINSIZE_16, PVR_BINSIZE_0, PVR_BINSIZE_16, PVR_BINSIZE_0, PVR_BINSIZE_16 },
+
+        /* Vertex buffer size */
+        512*1024
+};
+
+#ifdef HAVE_OPENGL
+static int pvr_inited;
+#endif
+
+SDL_Surface *DC_SetVideoMode(_THIS, SDL_Surface *current,
+				int width, int height, int bpp, Uint32 flags)
+{
+	int disp_mode,pixel_mode,pitch;
+	Uint32 Rmask, Gmask, Bmask;
+
+	if (width==320 && height==240) disp_mode=DM_320x240;
+	else if (width==640 && height==480) disp_mode=DM_640x480;
+	else if (width==800 && height==600) disp_mode=DM_800x608;
+	else {
+		SDL_SetError("Couldn't find requested mode in list");
+		return(NULL);
+	}
+
+	switch(bpp) {
+	case 15: pixel_mode = PM_RGB555; pitch = width*2;
+		/* 5-5-5 */
+		Rmask = 0x00007c00;
+		Gmask = 0x000003e0;
+		Bmask = 0x0000001f;
+		break;
+	case 16: pixel_mode = PM_RGB565; pitch = width*2;
+		/* 5-6-5 */
+		Rmask = 0x0000f800;
+		Gmask = 0x000007e0;
+		Bmask = 0x0000001f;
+		break;
+	case 24: bpp = 32;
+	case 32: pixel_mode = PM_RGB888; pitch = width*4;
+		Rmask = 0x00ff0000;
+		Gmask = 0x0000ff00;
+		Bmask = 0x000000ff;
+#ifdef	HAVE_OPENGL
+		if (!(flags & SDL_OPENGL))
+#endif
+		break;
+	default:
+		SDL_SetError("Couldn't find requested mode in list");
+		return(NULL);
+	}
+
+//  if ( bpp != current->format->BitsPerPixel ) {
+	if ( ! SDL_ReallocFormat(current, bpp, Rmask, Gmask, Bmask, 0) ) {
+		return(NULL);
+	}
+//  }
+
+	/* Set up the new mode framebuffer */
+	current->flags = (SDL_FULLSCREEN|SDL_HWSURFACE);
+	current->w = width;
+	current->h = height;
+	current->pitch = pitch;
+
+#ifdef HAVE_OPENGL
+	if (pvr_inited) {
+		pvr_inited = 0;
+		pvr_shutdown();
+	}
+#endif
+
+	vid_set_mode(disp_mode,pixel_mode);
+
+	current->pixels = vram_s;
+
+#ifdef	HAVE_OPENGL
+	if (flags & SDL_OPENGL) {
+		this->gl_config.driver_loaded = 1;
+		current->flags = SDL_FULLSCREEN | SDL_OPENGL;
+		current->pixels = NULL;
+		pvr_inited = 1;
+		pvr_init(&params);
+		glKosInit();
+		glKosBeginFrame();
+	} else
+#endif
+	if (flags | SDL_DOUBLEBUF) {
+		current->flags |= SDL_DOUBLEBUF;
+		current->pixels = (void*)((int)current->pixels | 0x400000);
+	}
+
+	/* We're done */
+	return(current);
+}
+
+/* We don't actually allow hardware surfaces other than the main one */
+static int DC_AllocHWSurface(_THIS, SDL_Surface *surface)
+{
+	return(-1);
+}
+static void DC_FreeHWSurface(_THIS, SDL_Surface *surface)
+{
+	return;
+}
+
+/* We need to wait for vertical retrace on page flipped displays */
+static int DC_LockHWSurface(_THIS, SDL_Surface *surface)
+{
+	return(0);
+}
+
+static void DC_UnlockHWSurface(_THIS, SDL_Surface *surface)
+{
+	return;
+}
+
+static int DC_FlipHWSurface(_THIS, SDL_Surface *surface)
+{
+	if (surface->flags & SDL_DOUBLEBUF) {
+		vid_set_start((int)surface->pixels & 0xffffff);
+		surface->pixels = (void*)((int)surface->pixels ^ 0x400000);
+	}
+	return(0);
+}
+
+static void DC_UpdateRects(_THIS, int numrects, SDL_Rect *rects)
+{
+	/* do nothing. */
+}
+
+static int DC_SetColors(_THIS, int firstcolor, int ncolors, SDL_Color *colors)
+{
+	/* do nothing of note. */
+	return(1);
+}
+
+/* Note:  If we are terminated, this could be called in the middle of
+   another SDL video routine -- notably UpdateRects.
+*/
+static void DC_VideoQuit(_THIS)
+{
+#ifdef HAVE_OPENGL
+	if (pvr_inited) {
+		pvr_inited = 0;
+		pvr_shutdown();
+	}
+#endif
+}
+
+#ifdef HAVE_OPENGL
+
+void dmyfunc(void) {}
+
+typedef void (*funcptr)();
+const static struct {
+	char *name;
+	funcptr addr;
+} glfuncs[] = {
+#define	DEF(func)	{#func,&func}
+	DEF(glBegin),
+	DEF(glBindTexture),
+	DEF(glBlendFunc),
+	DEF(glColor4f),
+//	DEF(glCopyImageID),
+	DEF(glDisable),
+	DEF(glEnable),
+	DEF(glEnd),
+	DEF(glFlush),
+	DEF(glGenTextures),
+	DEF(glGetString),
+	DEF(glLoadIdentity),
+	DEF(glMatrixMode),
+	DEF(glOrtho),
+	DEF(glPixelStorei),
+//	DEF(glPopAttrib),
+//	DEF(glPopClientAttrib),
+	{"glPopAttrib",&dmyfunc},
+	{"glPopClientAttrib",&dmyfunc},
+	DEF(glPopMatrix),
+//	DEF(glPushAttrib),
+//	DEF(glPushClientAttrib),
+	{"glPushAttrib",&dmyfunc},
+	{"glPushClientAttrib",&dmyfunc},
+	DEF(glPushMatrix),
+	DEF(glTexCoord2f),
+	DEF(glTexEnvf),
+	DEF(glTexImage2D),
+	DEF(glTexParameteri),
+	DEF(glTexSubImage2D),
+	DEF(glVertex2i),
+	DEF(glViewport),
+#undef	DEF
+};
+
+static void *DC_GL_GetProcAddress(_THIS, const char *proc)
+{
+	void *ret;
+	int i;
+
+	ret = glKosGetProcAddress(proc);
+	if (ret) return ret;
+
+	for(i=0;i<sizeof(glfuncs)/sizeof(glfuncs[0]);i++) {
+		if (strcmp(proc,glfuncs[i].name)==0) return glfuncs[i].addr;
+	}
+
+	return NULL;
+}
+
+static int DC_GL_LoadLibrary(_THIS, const char *path)
+{
+	this->gl_config.driver_loaded = 1;
+
+	return 0;
+}
+
+static int DC_GL_GetAttribute(_THIS, SDL_GLattr attrib, int* value)
+{
+	GLenum mesa_attrib;
+	int val;
+
+	switch(attrib) {
+	case SDL_GL_RED_SIZE:
+		val = 5;
+		break;
+	case SDL_GL_GREEN_SIZE:
+		val = 6;
+		break;
+	case SDL_GL_BLUE_SIZE:
+		val = 5;
+		break;
+	case SDL_GL_ALPHA_SIZE:
+		val = 0;
+		break;
+	case SDL_GL_DOUBLEBUFFER:
+		val = 1;
+		break;
+	case SDL_GL_DEPTH_SIZE:
+		val = 16; /* or 32? */
+		break;
+	case SDL_GL_STENCIL_SIZE:
+		val = 0;
+		break;
+	case SDL_GL_ACCUM_RED_SIZE:
+		val = 0;
+		break;
+	case SDL_GL_ACCUM_GREEN_SIZE:
+		val = 0;
+	case SDL_GL_ACCUM_BLUE_SIZE:
+		val = 0;
+		break;
+	case SDL_GL_ACCUM_ALPHA_SIZE:
+		val = 0;
+		break;
+	default :
+		return -1;
+	}
+	*value = val;
+	return 0;
+}
+
+static void DC_GL_SwapBuffers(_THIS)
+{
+	glKosFinishFrame();
+	glKosBeginFrame();
+}
+#endif
diff --git a/src/video/dc/SDL_dcvideo.h b/src/video/dc/SDL_dcvideo.h
new file mode 100644
index 000000000..79c940920
--- /dev/null
+++ b/src/video/dc/SDL_dcvideo.h
@@ -0,0 +1,51 @@
+/*
+    SDL - Simple DirectMedia Layer
+    Copyright (C) 1997, 1998, 1999, 2000, 2001, 2002  Sam Lantinga
+
+    This library is free software; you can redistribute it and/or
+    modify it under the terms of the GNU Library General Public
+    License as published by the Free Software Foundation; either
+    version 2 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
+    Library General Public License for more details.
+
+    You should have received a copy of the GNU Library General Public
+    License along with this library; if not, write to the Free
+    Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
+
+    BERO
+    bero@geocities.co.jp
+
+    based on SDL_nullvideo.h by
+
+    Sam Lantinga
+    slouken@libsdl.org
+*/
+
+#ifdef SAVE_RCSID
+static char rcsid =
+ "@(#) $Id$";
+#endif
+
+#ifndef _SDL_dcvideo_h
+#define _SDL_dcvideo_h
+
+#include "SDL_mouse.h"
+#include "SDL_sysvideo.h"
+#include "SDL_mutex.h"
+
+/* Hidden "this" pointer for the video functions */
+#define _THIS	SDL_VideoDevice *this
+
+
+/* Private display data */
+
+struct SDL_PrivateVideoData {
+    int w, h;
+    void *buffer;
+};
+
+#endif /* _SDL_dcvideo_h */