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[GCW0] added GCW Zero port (made by Shin-NiL & David Knight)

This commit is contained in:
EkeEke 2015-04-26 22:10:42 +02:00
parent d57d03e222
commit 8910b0c955
30 changed files with 5812 additions and 0 deletions
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181
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# Makefile for genplus SDL GCW0
#
# (c) 1999, 2000, 2001, 2002, 2003 Charles MacDonald
# modified by Eke-Eke <eke_eke31@yahoo.fr>
#
# Defines :
# -DLSB_FIRST : for little endian systems.
# -DLOGERROR : enable message logging
# -DLOGVDP : enable VDP debug messages
# -DLOGSOUND : enable AUDIO debug messages
# -DLOG_SCD : enable SCD debug messages
# -DLOG_CDD : enable CDD debug messages
# -DLOG_CDC : enable CDC debug messages
# -DLOG_PCM : enable PCM debug messages
# -DLOGSOUND : enable AUDIO debug messages
# -D8BPP_RENDERING - configure for 8-bit pixels (RGB332)
# -D15BPP_RENDERING - configure for 15-bit pixels (RGB555)
# -D16BPP_RENDERING - configure for 16-bit pixels (RGB565)
# -D32BPP_RENDERING - configure for 32-bit pixels (RGB888)
NAME = gen_gcw0
SDL-CONFIG = /opt/gcw0-toolchain/usr/mipsel-gcw0-linux-uclibc/sysroot/usr/bin/sdl-config
CC = /opt/gcw0-toolchain/usr/bin/mipsel-gcw0-linux-uclibc-gcc
#CFLAGS = `$(SDL-CONFIG) --cflags` -03 -fomit-frame-pointer -Wall -ansi -std=c99
#CFLAGS = `sdl-config --cflags` -O6 -fomit-frame-pointer -Wall -Wno-strict-aliasing -ansi -std=c99
CFLAGS = `$(SDL-CONFIG) --cflags` -O3 -fomit-frame-pointer -Wall -ansi -std=c99 -march=mips32 -mtune=mips32r2 -mhard-float
#-fomit-frame-pointer
#LDFLAGS = -g
DEFINES = -DLSB_FIRST -DUSE_16BPP_RENDERING -DUSE_LIBVORBIS -DGCWZERO -DALIGN_LONG -DALT_RENDERER
SRCDIR = ../core
INCLUDES = -I$(SRCDIR) -I$(SRCDIR)/z80 -I$(SRCDIR)/m68k \
-I$(SRCDIR)/sound -I$(SRCDIR)/input_hw -I$(SRCDIR)/cart_hw -I$(SRCDIR)/cart_hw/svp \
-I$(SRCDIR)/cd_hw -I$(SRCDIR)/ntsc \
-I$(SRCDIR)/../gcw0 \
-I/opt/gcw0-toolchain/usr/mipsel-gcw0-linux-uclibc/sysroot/usr/include/
# -I$(SRCDIR)/tremor
LIBS = `$(SDL-CONFIG) --libs --libs` -lz -lm -lSDL_ttf -lSDL_image \
-L/opt/gcw0-toolchain/usr/mipsel-gcw0-linux-uclibc/sysroot/usr/lib -lvorbisfile
OBJDIR = ./build_gcw0
OBJECTS = $(OBJDIR)/z80.o
OBJECTS += $(OBJDIR)/m68kcpu.o \
$(OBJDIR)/s68kcpu.o
OBJECTS += $(OBJDIR)/genesis.o \
$(OBJDIR)/vdp_ctrl.o \
$(OBJDIR)/vdp_render.o \
$(OBJDIR)/system.o \
$(OBJDIR)/io_ctrl.o \
$(OBJDIR)/mem68k.o \
$(OBJDIR)/memz80.o \
$(OBJDIR)/membnk.o \
$(OBJDIR)/state.o \
$(OBJDIR)/loadrom.o
OBJECTS += $(OBJDIR)/input.o \
$(OBJDIR)/gamepad.o \
$(OBJDIR)/lightgun.o \
$(OBJDIR)/mouse.o \
$(OBJDIR)/activator.o \
$(OBJDIR)/xe_1ap.o \
$(OBJDIR)/teamplayer.o \
$(OBJDIR)/paddle.o \
$(OBJDIR)/sportspad.o \
$(OBJDIR)/terebi_oekaki.o \
$(OBJDIR)/graphic_board.o
OBJECTS += $(OBJDIR)/sound.o \
$(OBJDIR)/sn76489.o \
$(OBJDIR)/ym2413.o \
$(OBJDIR)/ym2612.o
OBJECTS += $(OBJDIR)/blip_buf.o
OBJECTS += $(OBJDIR)/eq.o
OBJECTS += $(OBJDIR)/sram.o \
$(OBJDIR)/svp.o \
$(OBJDIR)/ssp16.o \
$(OBJDIR)/ggenie.o \
$(OBJDIR)/areplay.o \
$(OBJDIR)/eeprom_93c.o \
$(OBJDIR)/eeprom_i2c.o \
$(OBJDIR)/eeprom_spi.o \
$(OBJDIR)/md_cart.o \
$(OBJDIR)/sms_cart.o
OBJECTS += $(OBJDIR)/scd.o \
$(OBJDIR)/cdd.o \
$(OBJDIR)/cdc.o \
$(OBJDIR)/gfx.o \
$(OBJDIR)/pcm.o \
$(OBJDIR)/cd_cart.o
OBJECTS += $(OBJDIR)/sms_ntsc.o \
$(OBJDIR)/md_ntsc.o
OBJECTS += $(OBJDIR)/main.o \
$(OBJDIR)/config.o \
$(OBJDIR)/error.o \
$(OBJDIR)/unzip.o \
$(OBJDIR)/fileio.o \
$(OBJDIR)/utils.o #\
# $(OBJDIR)/menu.o
#OBJECTS += $(OBJDIR)/block.o \
# $(OBJDIR)/codebook.o \
# $(OBJDIR)/floor0.o \
# $(OBJDIR)/floor1.o \
# $(OBJDIR)/framing.o \
# $(OBJDIR)/info.o \
# $(OBJDIR)/mapping0.o \
# $(OBJDIR)/mdct.o \
# $(OBJDIR)/registry.o \
# $(OBJDIR)/res012.o \
# $(OBJDIR)/sharedbook.o \
# $(OBJDIR)/synthesis.o \
# $(OBJDIR)/vorbisfile.o \
# $(OBJDIR)/window.o
## 1st $(OBJDIR)/bitwise.o \
all: $(NAME)
$(NAME): $(OBJDIR) $(OBJECTS)
$(CC) $(LDFLAGS) $(OBJECTS) $(LIBS) -o $@
$(OBJDIR) :
@[ -d $@ ] || mkdir -p $@
$(OBJDIR)/%.o : $(SRCDIR)/%.c $(SRCDIR)/%.h
$(CC) -c $(CFLAGS) $(INCLUDES) $(DEFINES) $< -o $@
$(OBJDIR)/%.o : $(SRCDIR)/sound/%.c $(SRCDIR)/sound/%.h
$(CC) -c $(CFLAGS) $(INCLUDES) $(DEFINES) $< -o $@
$(OBJDIR)/%.o : $(SRCDIR)/input_hw/%.c $(SRCDIR)/input_hw/%.h
$(CC) -c $(CFLAGS) $(INCLUDES) $(DEFINES) $< -o $@
$(OBJDIR)/%.o : $(SRCDIR)/cart_hw/%.c $(SRCDIR)/cart_hw/%.h
$(CC) -c $(CFLAGS) $(INCLUDES) $(DEFINES) $< -o $@
$(OBJDIR)/%.o : $(SRCDIR)/cart_hw/svp/%.c
$(CC) -c $(CFLAGS) $(INCLUDES) $(DEFINES) $< -o $@
$(OBJDIR)/%.o : $(SRCDIR)/cart_hw/svp/%.c $(SRCDIR)/cart_hw/svp/%.h
$(CC) -c $(CFLAGS) $(INCLUDES) $(DEFINES) $< -o $@
$(OBJDIR)/%.o : $(SRCDIR)/cd_hw/%.c $(SRCDIR)/cd_hw/%.h
$(CC) -c $(CFLAGS) $(INCLUDES) $(DEFINES) $< -o $@
$(OBJDIR)/%.o : $(SRCDIR)/z80/%.c $(SRCDIR)/z80/%.h
$(CC) -c $(CFLAGS) $(INCLUDES) $(DEFINES) $< -o $@
$(OBJDIR)/%.o : $(SRCDIR)/m68k/%.c
$(CC) -c $(CFLAGS) $(INCLUDES) $(DEFINES) $< -o $@
$(OBJDIR)/%.o : $(SRCDIR)/ntsc/%.c $(SRCDIR)/ntsc/%.h
$(CC) -c $(CFLAGS) $(INCLUDES) $(DEFINES) $< -o $@
#$(OBJDIR)/%.o : $(SRCDIR)/tremor/%.c $(SRCDIR)/tremor/%.h
# $(CC) -c $(CFLAGS) $(INCLUDES) $(DEFINES) $< -o $@
#$(OBJDIR)/%.o : $(SRCDIR)/tremor/%.c
# $(CC) -c $(CFLAGS) $(INCLUDES) $(DEFINES) $< -o $@
$(OBJDIR)/%.o : $(SRCDIR)/../gcw0/%.c $(SRCDIR)/../gcw0/%.h
$(CC) -c $(CFLAGS) $(INCLUDES) $(DEFINES) $< -o $@
pack :
strip $(NAME)
upx -9 $(NAME)
clean:
rm -f $(OBJECTS) $(NAME)

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#include "osd.h"
t_config config;
static int config_load(void)
{
//TODO: extract to function
const char *homedir;
if ((homedir = getenv("HOME")) == NULL) {
homedir = getpwuid(getuid())->pw_dir;
}
/* open configuration file */
char fname[MAXPATHLEN];
sprintf (fname, "%s%s/config.ini", homedir, DEFAULT_PATH);
FILE *fp = fopen(fname, "rb");
if (fp)
{
/* check file size */
fseek(fp, 0, SEEK_END);
if (ftell(fp) != sizeof(config))
{
fclose(fp);
return 0;
}
/* read file */
fseek(fp, 0, SEEK_SET);
fread(&config, sizeof(config), 1, fp);
fclose(fp);
return 1;
}
return 0;
}
void set_config_defaults(void)
{
int i;
/* sound options */
config.psg_preamp = 150;
config.fm_preamp = 100;
config.hq_fm = 1;
config.psgBoostNoise = 1;
config.filter = 1;
config.low_freq = 200;
config.high_freq = 8000;
config.lg = 1.0;
config.mg = 1.0;
config.hg = 1.0;
config.lp_range = 0x9999; /* 0.6 in 16.16 fixed point */
config.dac_bits = 14;
config.ym2413 = 1; /* = AUTO (0 = always OFF, 1 = always ON) */
config.mono = 0;
/* system options */
config.system = 0; /* = AUTO (or SYSTEM_SG, SYSTEM_MARKIII, SYSTEM_SMS, SYSTEM_SMS2, SYSTEM_GG, SYSTEM_MD) */
config.region_detect = 0; /* = AUTO (1 = USA, 2 = EUROPE, 3 = JAPAN/NTSC, 4 = JAPAN/PAL) */
config.vdp_mode = 0; /* = AUTO (1 = NTSC, 2 = PAL) */
config.master_clock = 0; /* = AUTO (1 = NTSC, 2 = PAL) */
config.force_dtack = 0;
config.addr_error = 1;
config.bios = 0;
config.lock_on = 0; /* = OFF (can be TYPE_SK, TYPE_GG & TYPE_AR) */
config.ntsc = 0;
config.lcd = 0; /* 0.8 fixed point */
/* display options */
config.overscan = 0; /* 3 = all borders (0 = no borders , 1 = vertical borders only, 2 = horizontal borders only) */
config.gg_extra = 0; /* 1 = show extended Game Gear screen (256x192) */
config.render = 0; /* 1 = double resolution output (only when interlaced mode 2 is enabled) */
config.gcw0_fullscreen = 1; /* 1 = use IPU scaling */
config.keepaspectratio = 1; /* 1 = aspect ratio correct with black bars, 0 = fullscreen without correct aspect ratio */
config.gg_scanlines = 1; /* 1 = use scanlines on Game Gear */
config.smsmaskleftbar = 1; /* 1 = Mask left bar on SMS (better for horizontal scrolling) */
config.sl_autoresume = 1; /* 1 = Automatically resume when saving and loading snapshots */
config.a_stick = 1; /* 1 = A-Stick on */
config.lightgun_speed = 1; /* 1 = simple speed multiplier for lightgun */
config.gcw0_frameskip = 0; /* 0 = off, 1 = skip alternate frames, 2 = skip 2 in 3 frames, etc. Useful for FMV in MCD. */
/* controllers options */
config.cursor = 0; /* different cursor designs */
input.system[0] = SYSTEM_GAMEPAD;
input.system[1] = SYSTEM_GAMEPAD;
config.gun_cursor[0] = 1;
config.gun_cursor[1] = 1;
config.invert_mouse = 0;
for (i=0; i<MAX_INPUTS; i++)
{
/* autodetected control pad type */
config.input[i].padtype = DEVICE_PAD2B | DEVICE_PAD3B | DEVICE_PAD6B;
}
config.buttons[A] = SDLK_LSHIFT;//x
config.buttons[B] = SDLK_LALT;//b
config.buttons[C] = SDLK_LCTRL;//a
config.buttons[X] = SDLK_TAB;//l
config.buttons[Y] = SDLK_SPACE;//y
config.buttons[Z] = SDLK_BACKSPACE;//r
config.buttons[START] = SDLK_RETURN;//start
config.buttons[MODE] = SDLK_ESCAPE;//select
/* try to restore user config */
int loaded = config_load();
if (!loaded) {
printf("Default Settings restored\n");
}
}
void config_save(void)
{
//TODO: extract to function
const char *homedir;
if ((homedir = getenv("HOME")) == NULL) {
homedir = getpwuid(getuid())->pw_dir;
}
/* open configuration file */
char fname[MAXPATHLEN];
sprintf (fname, "%s%s/config.ini", homedir, DEFAULT_PATH);
//printf(fname);
FILE *fp = fopen(fname, "wb");
if (fp)
{
/* write file */
fwrite(&config, sizeof(config), 1, fp);
fclose(fp);
}
}

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#ifndef _CONFIG_H_
#define _CONFIG_H_
#include <pwd.h>
/****************************************************************************
* Config Option
*
****************************************************************************/
enum {A = 0, B, C, X, Y, Z, START, MODE};
typedef struct
{
uint8 padtype;
} t_input_config;
typedef struct
{
uint8 hq_fm;
uint8 filter;
uint8 psgBoostNoise;
uint8 dac_bits;
uint8 ym2413;
int16 psg_preamp;
int16 fm_preamp;
uint32 lp_range;
int16 low_freq;
int16 high_freq;
int16 lg;
int16 mg;
int16 hg;
uint8 mono;
uint8 system;
uint8 region_detect;
uint8 vdp_mode;
uint8 master_clock;
uint8 force_dtack;
uint8 addr_error;
uint8 bios;
uint8 lock_on;
uint8 hot_swap;
uint8 invert_mouse;
uint8 gun_cursor[2];
uint8 overscan;
uint8 gg_extra;
uint8 ntsc;
uint8 lcd;
uint8 render;
t_input_config input[MAX_INPUTS];
uint8 gcw0_fullscreen;
uint8 gcw0_frameskip;
uint8 keepaspectratio;
uint8 gg_scanlines;
uint8 smsmaskleftbar;
uint8 sl_autoresume;
uint8 lightgun_speed;
uint8 a_stick;
uint8 cursor;
SDLKey buttons[8];
//SDLKey button_a;
//SDLKey button_b;
//SDLKey button_c;
//SDLKey button_x;
//SDLKey button_y;
//SDLKey button_z;
//SDLKey button_start;
//SDLKey button_mode;
} t_config;
/* Global variables */
extern t_config config;
extern void config_save(void);
extern void set_config_defaults(void);
#endif /* _CONFIG_H_ */

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/*
error.c --
Error logging
*/
#include "osd.h"
static FILE *error_log;
void error_init(void)
{
#ifdef LOGERROR
error_log = fopen("error.log","w");
#endif
}
void error_shutdown(void)
{
#ifdef LOGERROR
if(error_log) fclose(error_log);
#endif
}
void error(char *format, ...)
{
#ifdef LOGERROR
if (log_error)
{
va_list ap;
va_start(ap, format);
if(error_log) vfprintf(error_log, format, ap);
va_end(ap);
}
#endif
}

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#ifndef _ERROR_H_
#define _ERROR_H_
/* Function prototypes */
void error_init(void);
void error_shutdown(void);
void error(char *format, ...);
#endif /* _ERROR_H_ */

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/*
* fileio.c
*
* Load a normal file, or ZIP/GZ archive into ROM buffer.
* Returns loaded ROM size (zero if an error occured)
*
*
* Copyright (C) 1998, 1999, 2000, 2001, 2002, 2003 Charles Mac Donald
* modified by Eke-Eke (Genesis Plus GX)
*
* Redistribution and use of this code or any derivative works are permitted
* provided that the following conditions are met:
*
* - Redistributions may not be sold, nor may they be used in a commercial
* product or activity.
*
* - Redistributions that are modified from the original source must include the
* complete source code, including the source code for all components used by a
* binary built from the modified sources. However, as a special exception, the
* source code distributed need not include anything that is normally distributed
* (in either source or binary form) with the major components (compiler, kernel,
* and so on) of the operating system on which the executable runs, unless that
* component itself accompanies the executable.
*
* - Redistributions must reproduce the above copyright notice, this list of
* conditions and the following disclaimer in the documentation and/or other
* materials provided with the distribution.
*
* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
* AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
* ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE
* LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
* CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
* SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
* INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
* CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
* ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
* POSSIBILITY OF SUCH DAMAGE.
*
****************************************************************************************/
#include "shared.h"
#include <zlib.h>
static int check_zip(char *filename);
int load_archive(char *filename, unsigned char *buffer, int maxsize, char *extension)
{
int size = 0;
if(check_zip(filename))
{
unz_file_info info;
int ret = 0;
char fname[256];
/* Attempt to open the archive */
unzFile *fd = unzOpen(filename);
if (!fd) return 0;
/* Go to first file in archive */
ret = unzGoToFirstFile(fd);
if(ret != UNZ_OK)
{
unzClose(fd);
return 0;
}
/* Get file informations and update filename */
ret = unzGetCurrentFileInfo(fd, &info, fname, 256, NULL, 0, NULL, 0);
if(ret != UNZ_OK)
{
unzClose(fd);
return 0;
}
/* Compressed filename extension */
if (extension)
{
strncpy(extension, &fname[strlen(fname) - 3], 3);
extension[3] = 0;
}
/* Open the file for reading */
ret = unzOpenCurrentFile(fd);
if(ret != UNZ_OK)
{
unzClose(fd);
return 0;
}
/* Retrieve uncompressed file size */
size = info.uncompressed_size;
if(size > maxsize)
{
size = maxsize;
}
/* Read (decompress) the file */
ret = unzReadCurrentFile(fd, buffer, size);
if(ret != size)
{
unzCloseCurrentFile(fd);
unzClose(fd);
return 0;
}
/* Close the current file */
ret = unzCloseCurrentFile(fd);
if(ret != UNZ_OK)
{
unzClose(fd);
return 0;
}
/* Close the archive */
ret = unzClose(fd);
if(ret != UNZ_OK) return 0;
}
else
{
/* Open file */
gzFile *gd = gzopen(filename, "rb");
if (!gd) return 0;
/* Read file data */
size = gzread(gd, buffer, maxsize);
/* filename extension */
if (extension)
{
strncpy(extension, &filename[strlen(filename) - 3], 3);
extension[3] = 0;
}
/* Close file */
gzclose(gd);
}
/* Return loaded ROM size */
return size;
}
/*
Verifies if a file is a ZIP archive or not.
Returns: 1= ZIP archive, 0= not a ZIP archive
*/
static int check_zip(char *filename)
{
uint8 buf[2];
FILE *fd = fopen(filename, "rb");
if(!fd) return (0);
fread(buf, 2, 1, fd);
fclose(fd);
if(memcmp(buf, "PK", 2) == 0) return (1);
return (0);
}

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/*
* fileio.c
*
* Load a normal file, or ZIP/GZ archive.
* Returns loaded ROM size (zero if an error occured)
*
* Copyright (C) 1998, 1999, 2000, 2001, 2002, 2003 Charles Mac Donald
* modified by Eke-Eke (Genesis Plus GX)
*
* Redistribution and use of this code or any derivative works are permitted
* provided that the following conditions are met:
*
* - Redistributions may not be sold, nor may they be used in a commercial
* product or activity.
*
* - Redistributions that are modified from the original source must include the
* complete source code, including the source code for all components used by a
* binary built from the modified sources. However, as a special exception, the
* source code distributed need not include anything that is normally distributed
* (in either source or binary form) with the major components (compiler, kernel,
* and so on) of the operating system on which the executable runs, unless that
* component itself accompanies the executable.
*
* - Redistributions must reproduce the above copyright notice, this list of
* conditions and the following disclaimer in the documentation and/or other
* materials provided with the distribution.
*
* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
* AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
* ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE
* LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
* CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
* SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
* INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
* CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
* ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
* POSSIBILITY OF SUCH DAMAGE.
*
****************************************************************************************/
#ifndef _FILEIO_H_
#define _FILEIO_H_
/* Function prototypes */
extern int load_archive(char *filename, unsigned char *buffer, int maxsize, char *extension);
#endif /* _FILEIO_H_ */

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#ifndef _MAIN_H_
#define _MAIN_H_
#define MAX_INPUTS 8
extern int debug_on;
extern int log_error;
extern int sdl_input_update(void);
#endif /* _MAIN_H_ */

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Unless otherwise explicitly stated, all code in Genesis Plus GX is released
under the following license:
Copyright (c) 1998-2003 Charles MacDonald
Some portions copyright Nicola Salmoria and the MAME team
All rights reserved.
Copyright (c) 2007-2015 Eke-Eke
All rights reserved.
Redistribution and use of this code or any derivative works are permitted
provided that the following conditions are met:
* Redistributions may not be sold, nor may they be used in a commercial
product or activity.
* Redistributions that are modified from the original source must include the
complete source code, including the source code for all components used by a
binary built from the modified sources. However, as a special exception, the
source code distributed need not include anything that is normally distributed
(in either source or binary form) with the major components (compiler, kernel,
and so on) of the operating system on which the executable runs, unless that
component itself accompanies the executable.
* Redistributions must reproduce the above copyright notice, this list of
conditions and the following disclaimer in the documentation and/or other
materials provided with the distribution.
THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE
LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
POSSIBILITY OF SUCH DAMAGE.
----------------------------------------------------------------------------------------
TREMOR library is distributed under the following license:
Copyright (c) 2002, Xiph.org Foundation
Redistribution and use in source and binary forms, with or without
modification, are permitted provided that the following conditions
are met:
- Redistributions of source code must retain the above copyright
notice, this list of conditions and the following disclaimer.
- Redistributions in binary form must reproduce the above copyright
notice, this list of conditions and the following disclaimer in the
documentation and/or other materials provided with the distribution.
- Neither the name of the Xiph.org Foundation nor the names of its
contributors may be used to endorse or promote products derived from
this software without specific prior written permission.
THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE FOUNDATION
OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
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----------------------------------------------------------------------------------------
NTSC Filter and Blip Buffer libraries are distributed under the
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Gamecube & Wii ports are linked with LIBASND library and includes code distributed under
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----------------------------------------------------------------------------------------

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[Desktop Entry]
Name=Genesis Plus GX
Comment=Genesis Plus GX for GCW-Zero
MimeType=application/zip;application/x-genesis-rom;application/x-megadrive-rom;application/x-sms-rom;application/x-cd-image;
Exec=gen_gcw0 %f
Terminal=false
Type=Application
StartupNotify=true
Icon=md
Categories=emulators;
X-OD-Manual=gcw0readme.txt

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Genesis Plus GX port for the GCW0 Handheld Console
GCW0 port by:
Shin-NiL
David Knight
Source code available at:
https://bitbucket.org/shin_nil/genesis-plus-gx-gcw0/
Genesis Plus GX is an open-source emulator focused on accuracy and portability, now emulating SG-1000, Master System, Game Gear, Mega Drive / Genesis and Sega / Mega CD hardware. Initially ported and designed to be running on Gamecube / Wii consoles through libogc / devkitPPC, it is also available for many other platforms through various frontends.
The source code is based on Genesis Plus 1.3, originally developped by Charles MacDonald (http://cgfm2.emuviews.com). It has been heavily modified, with respect to initial goals and design, in order to improve accuracy of emulation, implementing new features and adding support for extra peripherals, cartridge & systems hardware.
The result is that Genesis Plus GX is now more a continuation of the original project than a simple port, providing very accurate emulation and 100% compatibility with Genesis / Mega Drive, Sega / Mega CD, Master System, Game Gear & SG-1000 software (including all unlicensed or pirate known dumps), also emulating backwards compatibility modes when available.
Multi-platform sourcecode is available through SVN and GIT so that other Genesis Plus ports can take advantage of it. The sourcecode is released under a specific non-commercial license, see LICENSE.txt for more informations.
INSTRUCTIONS
For SG-1000, Game Gear (GG), Master System (SMS) and Mega Drive (Genesis, MD) you don't need to do anything. Just locate the rom file you wish to use (zip files are supported) and run it through the gMenu.
For Sega CD games you will need the correct bios files. These are not included with this distribution for copyright reasons. Once you have located the correct bios you will need to rename them according to the correct region:
"/usr/local/home/.genplus/bios/bios_CD_U.bin"
"/usr/local/home/.genplus/bios/bios_CD_E.bin"
"/usr/local/home/.genplus/bios/bios_CD_J.bin"
If everything is setup correctly you will then need to locate your image files and run them. .bin/.cue and .iso files are supported, .ogg compressed tracks are supported, .mp3 is NOT supported for legal reasons. (ogg is better anyway :P)
To access the menu press SELECT+START. Controls can be reconfigured from there. In the menu A selects option, B will go back to the last menu.
Default controls are:
D-Pad/A-Stick: Directions
X: A
B: B
A: C
L: X
Y: Y
R: Z
START: Start
SELECT: Mode
SELECT + START: Menu
SELECT + L: Quicksave to Savestate 1
SELECT + R: Quickload savestate 1
In lightgun games for the Master system and Genesis/MD A-stick controls the cursor and A/B/C work as normal. Player 2 controls are mapped to the D-pad and X/Y/Z buttons.
This allows (in theory at least!) two player games. It also allows you to select which control method you prefer. Some games (eg Spacegun) require two controllers.
CONFIGURATION OPTIONS (Default setting)
Scaling (On)
The gcw0 has hardware bilinear scaling which when turned on will enlarge the image to fill the screen. By default this keeps aspect ration so you will still see small bars unless the scaled resolution is exactly 320x240. This is particularly useful for SMS and GG games.
Keep aspect ratio (On)
This does nothing unless Scaling is turned on. If aspect ratio is turned off the hardware scaler will fill the whole screen and there will be no black bars visible.
Scanlines (GG) (On)
This emulates the vertical scanlines visible on the LCD screen. It is only used when running Game Gear games.
Mask left bar (SMS) (On)
The Master System often displays a vertical bar on the left of the screen. Setting this to 'On' will remove it.
Frameskip (0)
In all games except Mega CD this is of no use as the emulation is near perfect speed (with the exception of Virtual Racing). Setting this value will render fewer frames allowing a little speed increase. This improves the performance of FMV scenes in Mega CD games.
Resume on Save/Load (On)
When saving from the menu, the menu will automatically exit and the game will continue. If turned off it will return you to the menu.
A-stick (On)
Some users have issues with their analog controls causing erratic movements. Turning off the A-stick will stop this.
Lock-on (Off)
If enabled, when loading a rom the selected file will be loaded first.
Rename each binary file as follows:
Game Genie: "/usr/local/home/.genplus/lock-on/ggenie.bin"
Action Replay: "/usr/local/home/.genplus/lock-on/areplay.bin"
Sonic & Knuckles: "/usr/local/home/.genplus/lock-on/sk.bin" and /usr/local/home/.genplus/lock-on/sk2chip.bin additional info
After changing the lock-on option, you must reload the game rom.
FM sound (SMS) (On)
Select whether to use enhanced sound on a few Master System titles. A list of compatible titles is at the foot of this readme.
Lightgun Speed (1)
Higher values will speed up the lightgun cursor for player 1.
Lightgun Cursor
Change the lightgun cursor. The cursor is only visible in compatible lightgun games.
FM (enhanced music) Compatible Master system titles (taken from http://segaretro.org/FM_Sound_Unit)
(Note in most cases, only the Japanese variants are compatible)
After Burner
Alex Kidd BMX Trial
Alex Kidd: The Lost Stars
Alien Syndrome
Aztec Adventure
Blade Eagle 3-D
Bomber Raid
Captain Silver
Cyborg Hunter
Double Dragon
Fantasy Zone II
Fantasy Zone: The Maze
Galactic Protector
Global Defense
Golvellius - Valley of Doom
Great Golf
Hoshi Wo Sagashite...
Kenseiden
Lord of The Sword
Maze Hunter 3-D
Megumi Rescue
Miracle Warriors - Seal of The Dark Lord
Nekkyuu Koushien
OutRun
Parlour Games
Penguin Land
Phantasy Star
Power Strike
R-Type
Shinobi
Solomon no Kagi - Oujo Rihita no Namida
Space Harrier 3-D
SpellCaster
Super Racing
Tensai Bakabon
Thunder Blade
Wonder Boy in Monster Land
Ys: The Vanished Omens
Zaxxon 3-D
Zillion II: The Tri Formation
The following games have FM soundtracks but were not released in Japan:
Altered Beast
California Games
Casino Games
Cloud Master
Galaxy Force
Golfamania
OutRun 3-D
Poseidon Wars 3-D
Rampage
Rastan
Rescue Mission
Scramble Spirits
Shanghai
Tennis Ace
Time Soldiers
Ultima IV
Vigilante
Wonder Boy III: The Dragon's Trap
2015/03/22

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#!/bin/sh
rm -rf genplus.opk
mksquashfs gen_gcw0 opk-data/* genplus.opk -all-root -noappend -no-exports -no-xattrs

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#ifndef _OSD_H_
#define _OSD_H_
#include <stdio.h>
#include <string.h>
#include <stdarg.h>
#include <time.h>
#include <SDL.h>
#include <stdlib.h>
#include "shared.h"
#include "main.h"
#include "config.h"
#include "error.h"
#include "unzip.h"
#include "fileio.h"
#define MAXPATHLEN 1024
#define DEFAULT_PATH "/.genplus"
#define osd_input_update sdl_input_update
#define GG_ROM "/usr/local/home/.genplus/lock-on/ggenie.bin"
#define AR_ROM "/usr/local/home/.genplus/lock-on/areplay.bin"
#define SK_ROM "/usr/local/home/.genplus/lock-on/sk.bin"
#define SK_UPMEM "/usr/local/home/.genplus/lock-on/sk2chip.bin"
#define CD_BIOS_US "/usr/local/home/.genplus/bios/bios_CD_U.bin"
#define CD_BIOS_EU "/usr/local/home/.genplus/bios/bios_CD_E.bin"
#define CD_BIOS_JP "/usr/local/home/.genplus/bios/bios_CD_J.bin"
#define MD_BIOS "/usr/local/home/.genplus/bios/bios_MD.bin"
#define MS_BIOS_US "/usr/local/home/.genplus/bios/bios_U.sms"
#define MS_BIOS_EU "/usr/local/home/.genplus/bios/bios_E.sms"
#define MS_BIOS_JP "/usr/local/home/.genplus/bios/bios_J.sms"
#define GG_BIOS "/usr/local/home/.genplus/bios/bios.gg"
#endif /* _OSD_H_ */

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/* unzip.h -- IO for uncompress .zip files using zlib
Version 0.15 beta, Mar 19th, 1998,
Copyright (C) 1998 Gilles Vollant
This unzip package allow extract file from .ZIP file, compatible with PKZip 2.04g
WinZip, InfoZip tools and compatible.
Encryption and multi volume ZipFile (span) are not supported.
Old compressions used by old PKZip 1.x are not supported
THIS IS AN ALPHA VERSION. AT THIS STAGE OF DEVELOPPEMENT, SOMES API OR STRUCTURE
CAN CHANGE IN FUTURE VERSION !!
I WAIT FEEDBACK at mail info@winimage.com
Visit also http://www.winimage.com/zLibDll/unzip.htm for evolution
Condition of use and distribution are the same than zlib :
This software is provided 'as-is', without any express or implied
warranty. In no event will the authors be held liable for any damages
arising from the use of this software.
Permission is granted to anyone to use this software for any purpose,
including commercial applications, and to alter it and redistribute it
freely, subject to the following restrictions:
1. The origin of this software must not be misrepresented; you must not
claim that you wrote the original software. If you use this software
in a product, an acknowledgment in the product documentation would be
appreciated but is not required.
2. Altered source versions must be plainly marked as such, and must not be
misrepresented as being the original software.
3. This notice may not be removed or altered from any source distribution.
*/
/* for more info about .ZIP format, see
ftp://ftp.cdrom.com/pub/infozip/doc/appnote-970311-iz.zip
PkWare has also a specification at :
ftp://ftp.pkware.com/probdesc.zip */
#ifndef _unz_H
#define _unz_H
#ifdef __cplusplus
extern "C" {
#endif
#ifndef _ZLIB_H
#include "zlib.h"
#endif
#if defined(STRICTUNZIP) || defined(STRICTZIPUNZIP)
/* like the STRICT of WIN32, we define a pointer that cannot be converted
from (void*) without cast */
typedef struct TagunzFile__ { int unused; } unzFile__;
typedef unzFile__ *unzFile;
#else
typedef voidp unzFile;
#endif
#define UNZ_OK (0)
#define UNZ_END_OF_LIST_OF_FILE (-100)
#define UNZ_ERRNO (Z_ERRNO)
#define UNZ_EOF (0)
#define UNZ_PARAMERROR (-102)
#define UNZ_BADZIPFILE (-103)
#define UNZ_INTERNALERROR (-104)
#define UNZ_CRCERROR (-105)
/* tm_unz contain date/time info */
typedef struct tm_unz_s
{
uInt tm_sec; /* seconds after the minute - [0,59] */
uInt tm_min; /* minutes after the hour - [0,59] */
uInt tm_hour; /* hours since midnight - [0,23] */
uInt tm_mday; /* day of the month - [1,31] */
uInt tm_mon; /* months since January - [0,11] */
uInt tm_year; /* years - [1980..2044] */
} tm_unz;
/* unz_global_info structure contain global data about the ZIPfile
These data comes from the end of central dir */
typedef struct unz_global_info_s
{
uLong number_entry; /* total number of entries in
the central dir on this disk */
uLong size_comment; /* size of the global comment of the zipfile */
} unz_global_info;
/* unz_file_info contain information about a file in the zipfile */
typedef struct unz_file_info_s
{
uLong version; /* version made by 2 bytes */
uLong version_needed; /* version needed to extract 2 bytes */
uLong flag; /* general purpose bit flag 2 bytes */
uLong compression_method; /* compression method 2 bytes */
uLong dosDate; /* last mod file date in Dos fmt 4 bytes */
uLong crc; /* crc-32 4 bytes */
uLong compressed_size; /* compressed size 4 bytes */
uLong uncompressed_size; /* uncompressed size 4 bytes */
uLong size_filename; /* filename length 2 bytes */
uLong size_file_extra; /* extra field length 2 bytes */
uLong size_file_comment; /* file comment length 2 bytes */
uLong disk_num_start; /* disk number start 2 bytes */
uLong internal_fa; /* internal file attributes 2 bytes */
uLong external_fa; /* external file attributes 4 bytes */
tm_unz tmu_date;
} unz_file_info;
extern int ZEXPORT unzStringFileNameCompare OF ((const char* fileName1,
const char* fileName2,
int iCaseSensitivity));
/*
Compare two filename (fileName1,fileName2).
If iCaseSenisivity = 1, comparision is case sensitivity (like strcmp)
If iCaseSenisivity = 2, comparision is not case sensitivity (like strcmpi
or strcasecmp)
If iCaseSenisivity = 0, case sensitivity is defaut of your operating system
(like 1 on Unix, 2 on Windows)
*/
extern unzFile ZEXPORT unzOpen OF((const char *path));
/*
Open a Zip file. path contain the full pathname (by example,
on a Windows NT computer "c:\\zlib\\zlib111.zip" or on an Unix computer
"zlib/zlib111.zip".
If the zipfile cannot be opened (file don't exist or in not valid), the
return value is NULL.
Else, the return value is a unzFile Handle, usable with other function
of this unzip package.
*/
extern int ZEXPORT unzClose OF((unzFile file));
/*
Close a ZipFile opened with unzipOpen.
If there is files inside the .Zip opened with unzOpenCurrentFile (see later),
these files MUST be closed with unzipCloseCurrentFile before call unzipClose.
return UNZ_OK if there is no problem. */
extern int ZEXPORT unzGetGlobalInfo OF((unzFile file,
unz_global_info *pglobal_info));
/*
Write info about the ZipFile in the *pglobal_info structure.
No preparation of the structure is needed
return UNZ_OK if there is no problem. */
extern int ZEXPORT unzGetGlobalComment OF((unzFile file,
char *szComment,
uLong uSizeBuf));
/*
Get the global comment string of the ZipFile, in the szComment buffer.
uSizeBuf is the size of the szComment buffer.
return the number of byte copied or an error code <0
*/
/***************************************************************************/
/* Unzip package allow you browse the directory of the zipfile */
extern int ZEXPORT unzGoToFirstFile OF((unzFile file));
/*
Set the current file of the zipfile to the first file.
return UNZ_OK if there is no problem
*/
extern int ZEXPORT unzGoToNextFile OF((unzFile file));
/*
Set the current file of the zipfile to the next file.
return UNZ_OK if there is no problem
return UNZ_END_OF_LIST_OF_FILE if the actual file was the latest.
*/
extern int ZEXPORT unzLocateFile OF((unzFile file,
const char *szFileName,
int iCaseSensitivity));
/*
Try locate the file szFileName in the zipfile.
For the iCaseSensitivity signification, see unzStringFileNameCompare
return value :
UNZ_OK if the file is found. It becomes the current file.
UNZ_END_OF_LIST_OF_FILE if the file is not found
*/
extern int ZEXPORT unzGetCurrentFileInfo OF((unzFile file,
unz_file_info *pfile_info,
char *szFileName,
uLong fileNameBufferSize,
void *extraField,
uLong extraFieldBufferSize,
char *szComment,
uLong commentBufferSize));
/*
Get Info about the current file
if pfile_info!=NULL, the *pfile_info structure will contain somes info about
the current file
if szFileName!=NULL, the filemane string will be copied in szFileName
(fileNameBufferSize is the size of the buffer)
if extraField!=NULL, the extra field information will be copied in extraField
(extraFieldBufferSize is the size of the buffer).
This is the Central-header version of the extra field
if szComment!=NULL, the comment string of the file will be copied in szComment
(commentBufferSize is the size of the buffer)
*/
/***************************************************************************/
/* for reading the content of the current zipfile, you can open it, read data
from it, and close it (you can close it before reading all the file)
*/
extern int ZEXPORT unzOpenCurrentFile OF((unzFile file));
/*
Open for reading data the current file in the zipfile.
If there is no error, the return value is UNZ_OK.
*/
extern int ZEXPORT unzCloseCurrentFile OF((unzFile file));
/*
Close the file in zip opened with unzOpenCurrentFile
Return UNZ_CRCERROR if all the file was read but the CRC is not good
*/
extern int ZEXPORT unzReadCurrentFile OF((unzFile file,
voidp buf,
unsigned len));
/*
Read bytes from the current file (opened by unzOpenCurrentFile)
buf contain buffer where data must be copied
len the size of buf.
return the number of byte copied if somes bytes are copied
return 0 if the end of file was reached
return <0 with error code if there is an error
(UNZ_ERRNO for IO error, or zLib error for uncompress error)
*/
extern z_off_t ZEXPORT unztell OF((unzFile file));
/*
Give the current position in uncompressed data
*/
extern int ZEXPORT unzeof OF((unzFile file));
/*
return 1 if the end of file was reached, 0 elsewhere
*/
extern int ZEXPORT unzGetLocalExtrafield OF((unzFile file,
voidp buf,
unsigned len));
/*
Read extra field from the current file (opened by unzOpenCurrentFile)
This is the local-header version of the extra field (sometimes, there is
more info in the local-header version than in the central-header)
if buf==NULL, it return the size of the local extra field
if buf!=NULL, len is the size of the buffer, the extra header is copied in
buf.
the return value is the number of bytes copied in buf, or (if <0)
the error code
*/
#ifdef __cplusplus
}
#endif
#endif /* _unz_H */

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#include <sys/stat.h>
#include <dirent.h>
#include "utils.h"
#include "osd.h"
void create_default_directories(void) {
const char *homedir;
if ((homedir = getenv("HOME")) == NULL) {
homedir = getpwuid(getuid())->pw_dir;
}
char pathname[MAXPATHLEN];
/* base directory */
sprintf (pathname, "%s%s", homedir, DEFAULT_PATH);
DIR *dir = opendir(pathname);
if (dir) closedir(dir);
else mkdir(pathname,S_IRWXU);
/* default SRAM & Savestate files directories */
sprintf (pathname, "%s%s/saves", homedir, DEFAULT_PATH);
dir = opendir(pathname);
if (dir) closedir(dir);
else mkdir(pathname,S_IRWXU);
sprintf (pathname, "%s%s/saves/md", homedir, DEFAULT_PATH);
dir = opendir(pathname);
if (dir) closedir(dir);
else mkdir(pathname,S_IRWXU);
sprintf (pathname, "%s%s/saves/ms", homedir, DEFAULT_PATH);
dir = opendir(pathname);
if (dir) closedir(dir);
else mkdir(pathname,S_IRWXU);
sprintf (pathname, "%s%s/saves/gg", homedir, DEFAULT_PATH);
dir = opendir(pathname);
if (dir) closedir(dir);
else mkdir(pathname,S_IRWXU);
sprintf (pathname, "%s%s/saves/sg", homedir, DEFAULT_PATH);
dir = opendir(pathname);
if (dir) closedir(dir);
else mkdir(pathname,S_IRWXU);
sprintf (pathname, "%s%s/saves/cd", homedir, DEFAULT_PATH);
dir = opendir(pathname);
if (dir) closedir(dir);
else mkdir(pathname,S_IRWXU);
/* default Snapshot files directories */
sprintf (pathname, "%s%s/snaps", homedir, DEFAULT_PATH);
dir = opendir(pathname);
if (dir) closedir(dir);
else mkdir(pathname,S_IRWXU);
sprintf (pathname, "%s%s/snaps/md", homedir, DEFAULT_PATH);
dir = opendir(pathname);
if (dir) closedir(dir);
else mkdir(pathname,S_IRWXU);
sprintf (pathname, "%s%s/snaps/ms", homedir, DEFAULT_PATH);
dir = opendir(pathname);
if (dir) closedir(dir);
else mkdir(pathname,S_IRWXU);
sprintf (pathname, "%s%s/snaps/gg", homedir, DEFAULT_PATH);
dir = opendir(pathname);
if (dir) closedir(dir);
else mkdir(pathname,S_IRWXU);
sprintf (pathname, "%s%s/snaps/sg", homedir, DEFAULT_PATH);
dir = opendir(pathname);
if (dir) closedir(dir);
else mkdir(pathname,S_IRWXU);
sprintf (pathname, "%s%s/snaps/cd", homedir, DEFAULT_PATH);
dir = opendir(pathname);
if (dir) closedir(dir);
else mkdir(pathname,S_IRWXU);
/* default Cheat files directories */
sprintf (pathname, "%s%s/cheats", homedir, DEFAULT_PATH);
dir = opendir(pathname);
if (dir) closedir(dir);
else mkdir(pathname,S_IRWXU);
sprintf (pathname, "%s%s/cheats/md", homedir, DEFAULT_PATH);
dir = opendir(pathname);
if (dir) closedir(dir);
else mkdir(pathname,S_IRWXU);
sprintf (pathname, "%s%s/cheats/ms", homedir, DEFAULT_PATH);
dir = opendir(pathname);
if (dir) closedir(dir);
else mkdir(pathname,S_IRWXU);
sprintf (pathname, "%s%s/cheats/gg", homedir, DEFAULT_PATH);
dir = opendir(pathname);
if (dir) closedir(dir);
else mkdir(pathname,S_IRWXU);
sprintf (pathname, "%s%s/cheats/sg", homedir, DEFAULT_PATH);
dir = opendir(pathname);
if (dir) closedir(dir);
else mkdir(pathname,S_IRWXU);
sprintf (pathname, "%s%s/cheats/cd", homedir, DEFAULT_PATH);
dir = opendir(pathname);
if (dir) closedir(dir);
else mkdir(pathname,S_IRWXU);
/* default BIOS ROM files directories */
sprintf (pathname, "%s%s/bios", homedir, DEFAULT_PATH);
dir = opendir(pathname);
if (dir) closedir(dir);
else mkdir(pathname,S_IRWXU);
/* default LOCK-ON ROM files directories */
sprintf (pathname, "%s%s/lock-on", homedir, DEFAULT_PATH);
dir = opendir(pathname);
if (dir) closedir(dir);
else mkdir(pathname,S_IRWXU);
}
char* get_save_directory(void) {
const char *homedir;
const char *system_dir;
if ((homedir = getenv("HOME")) == NULL) {
homedir = getpwuid(getuid())->pw_dir;
}
char pathname[MAXPATHLEN];
if(system_hw <= SYSTEM_MARKIII){
system_dir = "/saves/sg";
} else if (system_hw > SYSTEM_MARKIII && system_hw <= SYSTEM_SMS2) {
system_dir = "/saves/ms";
} else if (system_hw > SYSTEM_SMS2 && system_hw <= SYSTEM_GGMS) {
system_dir = "/saves/gg";
} else if (system_hw == SYSTEM_MD) {
system_dir = "/saves/md";
} else if (system_hw == SYSTEM_MCD) {
system_dir = "/saves/cd";
} else {
system_dir = "/saves/";
}
sprintf (pathname, "%s%s%s", homedir, DEFAULT_PATH, system_dir);
return pathname;
}
char* gcw0_get_key_name(int keycode)
{
if (keycode == SDLK_UP) return "Up";
else if (keycode == SDLK_DOWN) return "Down";
else if (keycode == SDLK_LEFT) return "Left";
else if (keycode == SDLK_RIGHT) return "Right";
else if (keycode == SDLK_LCTRL) return "A";
else if (keycode == SDLK_LALT) return "B";
else if (keycode == SDLK_LSHIFT) return "X";
else if (keycode == SDLK_SPACE) return "Y";
else if (keycode == SDLK_TAB) return "L";
else if (keycode == SDLK_BACKSPACE) return "R";
else if (keycode == SDLK_RETURN) return "Start";
else if (keycode == SDLK_ESCAPE) return "Select";
else return "...";
}
char *get_file_name(char *full_path) {
char file_name[256];
sprintf(file_name, "%s", basename(full_path));
/* remove file extension */
int i = strlen(file_name) - 1;
while ((i > 0) && (file_name[i] != '.')) i--;
if (i > 0) file_name[i] = 0;
return file_name;
}

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#ifndef _UTILS_H_
#define _UTILS_H_
/* Function prototypes */
void create_default_directories(void);
char* get_save_directory(void);
char* gcw0_get_key_name(int keycode);
char *get_file_name(char *full_path);
#endif /* _UTILS_H_ */