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libretro.c
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libretro.c
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#include <stdio.h>
#include <stdint.h>
#include <stdlib.h>
#include <ctype.h>
#include <string.h>
#include <math.h>
#include <strings.h>
#include <libretro.h>
#include <libretro_core_options.h>
#include <string/stdstring.h>
#ifdef USE_LIBRETRO_VFS
#include <streams/file_stream_transforms.h>
#endif
#include "libretro/winx68k.h"
#include "libretro/dosio.h"
#include "libretro/dswin.h"
#include "libretro/windraw.h"
#include "libretro/joystick.h"
#include "libretro/keyboard.h"
#include "libretro/prop.h"
#include "libretro/status.h"
#include "libretro/timer.h"
#include "libretro/mouse.h"
#include "libretro/winui.h"
#include "fmgen/fmg_wrap.h"
#include "m68000/m68000.h"
#include "x68k/adpcm.h"
#include "x68k/fdd.h"
#include "x68k/sram.h"
#include "x68k/sysport.h"
#include "x68k/x68kmemory.h"
#ifndef NO_MERCURY
#include "x68k/mercury.h"
#endif
#include "x68k/mfp.h"
#include "x68k/gvram.h"
#include "x68k/tvram.h"
#include "x68k/crtc.h"
#include "x68k/dmac.h"
#include "x68k/irqh.h"
#include "x68k/palette.h"
#include "x68k/bg.h"
#include "x68k/pia.h"
#include "x68k/ioc.h"
#include "x68k/scsi.h"
#include "x68k/sasi.h"
#include "x68k/fdc.h"
#include "x68k/rtc.h"
#include "x68k/scc.h"
#ifdef _WIN32
#define SLASH '\\'
#else
#define SLASH '/'
#endif
#define MODE_HIGH_ACTUAL 55.46 /* floor((10*100*1000^2 / VSYNC_HIGH)) / 100 */
#define MODE_NORM_ACTUAL 61.46 /* floor((10*100*1000^2 / VSYNC_NORM)) / 100 */
#define MODE_HIGH_COMPAT 55.5 /* 31.50 kHz - commonly used */
#define MODE_NORM_COMPAT 59.94 /* 15.98 kHz - actual value should be ~61.46 fps. this is lowered to
* reduced the chances of audio stutters due to mismatch
* fps when vsync is used since most monitors are only capable
* of upto 60Hz refresh rate. */
enum
{
MODES_ACTUAL,
MODES_COMPAT,
MODE_NORM = 0,
MODE_HIGH,
MODES
};
const float framerates[2][2] = {
{ MODE_NORM_ACTUAL, MODE_HIGH_ACTUAL },
{ MODE_NORM_COMPAT, MODE_HIGH_COMPAT }
};
char winx68k_dir[2048];
char winx68k_ini[2048];
uint16_t VLINE_TOTAL = 567;
uint32_t VLINE = 0;
uint32_t vline = 0;
#define SOUNDRATE 44100.0
#define SNDSZ round(SOUNDRATE / FRAMERATE)
static int firstcall = 1;
static uint32_t old_ram_size = 0;
static int old_clkdiv = 0;
static int oldrw=0,oldrh = 0;
static char RPATH[512];
static char RETRO_DIR[512];
static const char *retro_save_directory;
static const char *retro_system_directory;
static const char *retro_browse_directory;
const char *retro_content_directory;
char retro_system_conf[512]; /* system directory path */
char retro_browse_conf[512]; /* file browser default path */
char base_dir[MAX_PATH];
static uint8_t Core_Key_State[512];
static uint8_t Core_old_Key_State[512];
static bool joypad1, joypad2;
static bool opt_analog;
static char CMDFILE[512];
/* Args for experimental_cmdline */
static char ARGUV[64][1024];
static unsigned char ARGUC = 0;
/* Args for Core */
static char XARGV[64][1024];
static const char* xargv_cmd[64];
static int PARAMCOUNT = 0;
static uint8_t DispFrame = 0;
static int FrameSkipCount = 0;
static int FrameSkipQueue = 0;
static int ClkUsed = 0;
uint32_t retrow = 800;
uint32_t retroh = 600;
int CHANGEAV = 0;
int CHANGEAV_TIMING = 0; /* Separate change of geometry from change of refresh rate */
int VID_MODE = MODE_NORM; /* what framerate we start in */
static float FRAMERATE;
uint32_t libretro_supports_input_bitmasks = 0;
unsigned int total_usec = (unsigned int) -1;
static int16_t soundbuf[1024 * 2];
static int soundbuf_size;
uint16_t *videoBuffer;
enum {
menu_out,
menu_enter,
menu_in
};
static int menu_mode = menu_out;
static retro_video_refresh_t video_cb;
static retro_environment_t environ_cb;
static retro_input_poll_t input_poll_cb;
static retro_set_rumble_state_t rumble_cb;
retro_input_state_t input_state_cb;
retro_audio_sample_t audio_cb;
retro_audio_sample_batch_t audio_batch_cb;
retro_log_printf_t log_cb;
#ifdef USE_LIBRETRO_VFS
struct retro_vfs_interface_info vfs_iface_info;
#endif
static unsigned no_content;
static bool opt_rumble_enabled = false;
#define MAX_DISKS 10
typedef enum
{
FDD0 = 0,
FDD1 = 1
} disk_drive;
/* .dsk swap support */
struct disk_control_interface_t
{
unsigned dci_version; /* disk control interface version, 0 = use old interface */
unsigned total_images; /* total number if disk images */
unsigned index; /* currect disk index */
disk_drive cur_drive; /* current active drive */
bool inserted[2]; /* tray state for FDD0/FDD1, 0 = disk ejected, 1 = disk inserted */
char path[MAX_DISKS][MAX_PATH]; /* disk image paths */
char label[MAX_DISKS][MAX_PATH]; /* disk image base name w/o extension */
unsigned g_initial_disc; /* initial disk index */
char g_initial_disc_path[MAX_PATH]; /* initial disk path */
};
static struct disk_control_interface_t disk;
static struct retro_disk_control_callback dskcb;
static struct retro_disk_control_ext_callback dskcb_ext;
static struct retro_input_descriptor input_descs[64];
static struct retro_input_descriptor input_descs_p1[] = {
{ 0, RETRO_DEVICE_JOYPAD, 0, RETRO_DEVICE_ID_JOYPAD_A, "A" },
{ 0, RETRO_DEVICE_JOYPAD, 0, RETRO_DEVICE_ID_JOYPAD_B, "B" },
{ 0, RETRO_DEVICE_JOYPAD, 0, RETRO_DEVICE_ID_JOYPAD_X, "X" },
{ 0, RETRO_DEVICE_JOYPAD, 0, RETRO_DEVICE_ID_JOYPAD_Y, "Y" },
{ 0, RETRO_DEVICE_JOYPAD, 0, RETRO_DEVICE_ID_JOYPAD_SELECT, "Select" },
{ 0, RETRO_DEVICE_JOYPAD, 0, RETRO_DEVICE_ID_JOYPAD_START, "Start" },
{ 0, RETRO_DEVICE_JOYPAD, 0, RETRO_DEVICE_ID_JOYPAD_RIGHT, "Right" },
{ 0, RETRO_DEVICE_JOYPAD, 0, RETRO_DEVICE_ID_JOYPAD_LEFT, "Left" },
{ 0, RETRO_DEVICE_JOYPAD, 0, RETRO_DEVICE_ID_JOYPAD_UP, "Up" },
{ 0, RETRO_DEVICE_JOYPAD, 0, RETRO_DEVICE_ID_JOYPAD_DOWN, "Down" },
{ 0, RETRO_DEVICE_JOYPAD, 0, RETRO_DEVICE_ID_JOYPAD_R, "R" },
{ 0, RETRO_DEVICE_JOYPAD, 0, RETRO_DEVICE_ID_JOYPAD_L, "L" },
{ 0, RETRO_DEVICE_JOYPAD, 0, RETRO_DEVICE_ID_JOYPAD_R2, "R2 - Touroku" },
{ 0, RETRO_DEVICE_JOYPAD, 0, RETRO_DEVICE_ID_JOYPAD_L2, "L2 - Menu" },
{ 0, RETRO_DEVICE_JOYPAD, 0, RETRO_DEVICE_ID_JOYPAD_R3, "R3" },
{ 0, RETRO_DEVICE_JOYPAD, 0, RETRO_DEVICE_ID_JOYPAD_L3, "L3" },
};
static struct retro_input_descriptor input_descs_p2[] = {
{ 1, RETRO_DEVICE_JOYPAD, 0, RETRO_DEVICE_ID_JOYPAD_A, "A" },
{ 1, RETRO_DEVICE_JOYPAD, 0, RETRO_DEVICE_ID_JOYPAD_B, "B" },
{ 1, RETRO_DEVICE_JOYPAD, 0, RETRO_DEVICE_ID_JOYPAD_X, "X" },
{ 1, RETRO_DEVICE_JOYPAD, 0, RETRO_DEVICE_ID_JOYPAD_Y, "Y" },
{ 1, RETRO_DEVICE_JOYPAD, 0, RETRO_DEVICE_ID_JOYPAD_SELECT, "Select" },
{ 1, RETRO_DEVICE_JOYPAD, 0, RETRO_DEVICE_ID_JOYPAD_START, "Start" },
{ 1, RETRO_DEVICE_JOYPAD, 0, RETRO_DEVICE_ID_JOYPAD_RIGHT, "Right" },
{ 1, RETRO_DEVICE_JOYPAD, 0, RETRO_DEVICE_ID_JOYPAD_LEFT, "Left" },
{ 1, RETRO_DEVICE_JOYPAD, 0, RETRO_DEVICE_ID_JOYPAD_UP, "Up" },
{ 1, RETRO_DEVICE_JOYPAD, 0, RETRO_DEVICE_ID_JOYPAD_DOWN, "Down" },
{ 1, RETRO_DEVICE_JOYPAD, 0, RETRO_DEVICE_ID_JOYPAD_R, "R" },
{ 1, RETRO_DEVICE_JOYPAD, 0, RETRO_DEVICE_ID_JOYPAD_L, "L" },
{ 1, RETRO_DEVICE_JOYPAD, 0, RETRO_DEVICE_ID_JOYPAD_R2, "R2" },
{ 1, RETRO_DEVICE_JOYPAD, 0, RETRO_DEVICE_ID_JOYPAD_L2, "L2" },
{ 1, RETRO_DEVICE_JOYPAD, 0, RETRO_DEVICE_ID_JOYPAD_R3, "R3" },
{ 1, RETRO_DEVICE_JOYPAD, 0, RETRO_DEVICE_ID_JOYPAD_L3, "L3" },
};
static struct retro_input_descriptor input_descs_null[] = {
{ 0, 0, 0, 0, NULL }
};
static bool is_path_absolute(const char* path)
{
if (path[0] == SLASH)
return true;
#ifdef _WIN32
if ((path[0] >= 'a' && path[0] <= 'z') ||
(path[0] >= 'A' && path[0] <= 'Z'))
{
if (path[1] == ':')
return true;
}
#endif
return false;
}
static void extract_basename(char *buf, const char *path, size_t size)
{
const char *base = strrchr(path, '/');
if (!base)
base = strrchr(path, '\\');
if (!base)
base = path;
if (*base == '\\' || *base == '/')
base++;
strncpy(buf, base, size - 1);
buf[size - 1] = '\0';
char *ext = strrchr(buf, '.');
if (ext)
*ext = '\0';
}
static void extract_directory(char *buf, const char *path, size_t size)
{
char *base = NULL;
strncpy(buf, path, size - 1);
buf[size - 1] = '\0';
base = strrchr(buf, '/');
if (!base)
base = strrchr(buf, '\\');
if (base)
*base = '\0';
else
buf[0] = '\0';
}
/* BEGIN MIDI INTERFACE */
#include "x68k/midi.h"
#include "libretro/mmsystem.h"
static int libretro_supports_midi_output = 0;
static struct retro_midi_interface midi_cb = { 0 };
static bool libretro_supports_option_categories = 0;
void midi_out_short_msg(size_t msg)
{
if (libretro_supports_midi_output && midi_cb.output_enabled())
{
midi_cb.write(msg & 0xFF, 0); /* status byte */
midi_cb.write((msg >> 8) & 0xFF, 0); /* note no. */
midi_cb.write((msg >> 16) & 0xFF, 0); /* velocity */
}
}
void midi_out_long_msg(uint8_t *s, size_t len)
{
if (libretro_supports_midi_output && midi_cb.output_enabled())
{
int i;
for (i = 0; i < len; i++)
midi_cb.write(s[i], 0);
}
}
int midi_out_open(void **phmo)
{
if (libretro_supports_midi_output && midi_cb.output_enabled())
{
*phmo = &midi_cb;
return 0;
}
return 1;
}
static void update_variable_midi_interface(int running)
{
struct retro_variable var;
var.key = "px68k_midi_output";
var.value = NULL;
if (!running && environ_cb(RETRO_ENVIRONMENT_GET_VARIABLE, &var) && var.value)
{
if (!strcmp(var.value, "disabled"))
Config.MIDI_SW = 0;
else if (!strcmp(var.value, "enabled"))
Config.MIDI_SW = 1;
}
var.key = "px68k_midi_output_type";
var.value = NULL;
if (environ_cb(RETRO_ENVIRONMENT_GET_VARIABLE, &var) && var.value)
{
if (!strcmp(var.value, "LA"))
Config.MIDI_Type = 0;
else if (!strcmp(var.value, "GM"))
Config.MIDI_Type = 1;
else if (!strcmp(var.value, "GS"))
Config.MIDI_Type = 2;
else if (!strcmp(var.value, "XG"))
Config.MIDI_Type = 3;
}
}
static void midi_interface_init(void)
{
libretro_supports_midi_output = 0;
if (environ_cb(RETRO_ENVIRONMENT_GET_MIDI_INTERFACE, &midi_cb))
libretro_supports_midi_output = 1;
}
/* END OF MIDI INTERFACE */
static void update_variable_disk_drive_swap(void)
{
struct retro_variable var =
{
"px68k_disk_drive",
NULL
};
if (environ_cb(RETRO_ENVIRONMENT_GET_VARIABLE, &var) && var.value)
{
if (strcmp(var.value, "FDD0") == 0)
disk.cur_drive = FDD0;
else
disk.cur_drive = FDD1;
}
}
static bool set_eject_state(bool ejected)
{
if (disk.index == disk.total_images)
return true; /* Frontend is trying to set "no disk in tray" */
if (ejected)
{
FDD_EjectFD(disk.cur_drive);
Config.FDDImage[disk.cur_drive][0] = '\0';
}
else
{
strcpy(Config.FDDImage[disk.cur_drive], disk.path[disk.index]);
FDD_SetFD(disk.cur_drive, Config.FDDImage[disk.cur_drive], 0);
}
disk.inserted[disk.cur_drive] = !ejected;
return true;
}
static bool get_eject_state(void)
{
update_variable_disk_drive_swap();
return !disk.inserted[disk.cur_drive];
}
static unsigned get_image_index(void)
{
return disk.index;
}
static bool set_image_index(unsigned index)
{
disk.index = index;
return true;
}
static unsigned get_num_images(void)
{
return disk.total_images;
}
static bool add_image_index(void)
{
if (disk.total_images >= MAX_DISKS)
return false;
disk.total_images++;
return true;
}
static bool replace_image_index(unsigned index, const struct retro_game_info *info)
{
char image[MAX_PATH];
strcpy(disk.path[index], info->path);
extract_basename(image, info->path, sizeof(image));
snprintf(disk.label[index], sizeof(disk.label), "%s", image);
return true;
}
static bool disk_set_initial_image(unsigned index, const char *path)
{
if (string_is_empty(path))
return false;
disk.g_initial_disc = index;
strncpy(disk.g_initial_disc_path, path, sizeof(disk.g_initial_disc_path));
return true;
}
static bool disk_get_image_path(unsigned index, char *path, size_t len)
{
if (len < 1)
return false;
if (index < disk.total_images)
{
if (!string_is_empty(disk.path[index]))
{
strncpy(path, disk.path[index], len);
return true;
}
}
return false;
}
static bool disk_get_image_label(unsigned index, char *label, size_t len)
{
if (len < 1)
return false;
if (index < disk.total_images)
{
if (!string_is_empty(disk.label[index]))
{
strncpy(label, disk.label[index], len);
return true;
}
}
return false;
}
static void attach_disk_swap_interface(void)
{
dskcb.set_eject_state = set_eject_state;
dskcb.get_eject_state = get_eject_state;
dskcb.set_image_index = set_image_index;
dskcb.get_image_index = get_image_index;
dskcb.get_num_images = get_num_images;
dskcb.add_image_index = add_image_index;
dskcb.replace_image_index = replace_image_index;
environ_cb(RETRO_ENVIRONMENT_SET_DISK_CONTROL_INTERFACE, &dskcb);
}
void attach_disk_swap_interface_ext(void)
{
dskcb_ext.set_eject_state = set_eject_state;
dskcb_ext.get_eject_state = get_eject_state;
dskcb_ext.set_image_index = set_image_index;
dskcb_ext.get_image_index = get_image_index;
dskcb_ext.get_num_images = get_num_images;
dskcb_ext.add_image_index = add_image_index;
dskcb_ext.replace_image_index = replace_image_index;
dskcb_ext.set_initial_image = NULL;
dskcb_ext.get_image_path = disk_get_image_path;
dskcb_ext.get_image_label = disk_get_image_label;
environ_cb(RETRO_ENVIRONMENT_SET_DISK_CONTROL_EXT_INTERFACE, &dskcb_ext);
}
static void disk_swap_interface_init(void)
{
unsigned i;
disk.dci_version = 0;
disk.total_images = 0;
disk.index = 0;
disk.cur_drive = FDD1;
disk.inserted[0] = false;
disk.inserted[1] = false;
disk.g_initial_disc = 0;
disk.g_initial_disc_path[0] = '\0';
for (i = 0; i < MAX_DISKS; i++)
{
disk.path[i][0] = '\0';
disk.label[i][0] = '\0';
}
if (environ_cb(RETRO_ENVIRONMENT_GET_DISK_CONTROL_INTERFACE_VERSION, &disk.dci_version) && (disk.dci_version >= 1))
attach_disk_swap_interface_ext();
else
attach_disk_swap_interface();
}
/* end .dsk swap support */
void retro_set_video_refresh(retro_video_refresh_t cb) { video_cb = cb; }
void retro_set_audio_sample(retro_audio_sample_t cb) { audio_cb = cb; }
void retro_set_audio_sample_batch(retro_audio_sample_batch_t cb) { audio_batch_cb = cb; }
void retro_set_input_poll(retro_input_poll_t cb) { input_poll_cb = cb; }
void retro_set_input_state(retro_input_state_t cb) { input_state_cb = cb; }
static int loadcmdfile(char *argv)
{
int res = 0;
FILE *fp = fopen(argv, "r");
if (fp)
{
if (fgets(CMDFILE, 512, fp) != NULL)
res = 1;
fclose(fp);
}
return res;
}
static size_t handle_extension(char *path, char *ext)
{
size_t len = strlen(path);
if (len >= 4 &&
path[len - 4] == '.' &&
path[len - 3] == ext[0] &&
path[len - 2] == ext[1] &&
path[len - 1] == ext[2])
return 1;
return 0;
}
static void parse_cmdline(const char *argv)
{
char *p, *p2, *start_of_word;
int c, c2;
static char buffer[512 * 4];
enum states { DULL, IN_WORD, IN_STRING } state = DULL;
strcpy(buffer, argv);
strcat(buffer, " \0");
for (p = buffer; *p != '\0'; p++)
{
c = (unsigned char) *p; /* convert to unsigned char for is* functions */
switch (state)
{
case DULL: /* not in a word, not in a double quoted string */
if (isspace(c)) /* still not in a word, so ignore this char */
continue;
/* not a space -- if it's a double quote we go to IN_STRING, else to IN_WORD */
if (c == '"')
{
state = IN_STRING;
start_of_word = p + 1; /* word starts at *next* char, not this one */
continue;
}
state = IN_WORD;
start_of_word = p; /* word starts here */
continue;
case IN_STRING:
/* we're in a double quoted string, so keep going until we hit a close " */
if (c == '"')
{
/* word goes from start_of_word to p-1
*... do something with the word ... */
for (c2 = 0, p2 = start_of_word; p2 < p; p2++, c2++)
ARGUV[ARGUC][c2] = (unsigned char) *p2;
ARGUC++;
state = DULL; /* back to "not in word, not in string" state */
}
continue; /* either still IN_STRING or we handled the end above */
case IN_WORD:
/* we're in a word, so keep going until we get to a space */
if (isspace(c))
{
/* word goes from start_of_word to p-1
*... do something with the word ... */
for (c2 = 0, p2 = start_of_word; p2 <p; p2++, c2++)
ARGUV[ARGUC][c2] = (unsigned char) *p2;
ARGUC++;
state = DULL; /* back to "not in word, not in string" state */
}
continue; /* either still IN_WORD or we handled the end above */
}
}
}
static bool read_m3u(const char *file)
{
unsigned index = 0;
char line[MAX_PATH];
char name[MAX_PATH];
FILE *f = fopen(file, "r");
if (!f)
return false;
while (fgets(line, sizeof(line), f) && index < sizeof(disk.path) / sizeof(disk.path[0]))
{
if (line[0] == '#')
continue;
char *carriage_return = strchr(line, '\r');
if (carriage_return)
*carriage_return = '\0';
char *newline = strchr(line, '\n');
if (newline)
*newline = '\0';
/* Remove any beginning and ending quotes as these can cause issues when feeding the paths into command line later */
if (line[0] == '"')
memmove(line, line + 1, strlen(line));
if (line[strlen(line) - 1] == '"')
line[strlen(line) - 1] = '\0';
if (line[0] != '\0')
{
char image_label[4096];
char *custom_label;
size_t len = 0;
if (is_path_absolute(line))
strncpy(name, line, sizeof(name));
else
snprintf(name, sizeof(name), "%s%c%s", base_dir, SLASH, line);
custom_label = strchr(name, '|');
if (custom_label)
{
/* get disk path */
len = custom_label + 1 - name;
strncpy(disk.path[index], name, len - 1);
/* get custom label */
custom_label++;
strncpy(disk.label[index], custom_label, sizeof(disk.label[index]));
}
else
{
/* copy path */
strncpy(disk.path[index], name, sizeof(disk.path[index]));
/* extract base name from path for labels */
extract_basename(image_label, name, sizeof(image_label));
strncpy(disk.label[index], image_label, sizeof(disk.label[index]));
}
index++;
}
}
disk.total_images = index;
fclose(f);
return (disk.total_images != 0);
}
static void Add_Option(const char* option)
{
static int first = 0;
if(first == 0)
{
PARAMCOUNT = 0;
first++;
}
strcpy(XARGV[PARAMCOUNT++], option);
}
static int retro_load_game_internal(const char *argv)
{
if (strlen(argv) > strlen("cmd"))
{
int res = 0;
if (handle_extension((char*)argv, "cmd") || handle_extension((char*)argv, "CMD"))
{
int i;
if (!(res = loadcmdfile((char*)argv)))
{
if (log_cb)
log_cb(RETRO_LOG_ERROR, "%s\n", "[libretro]: failed to read cmd file ...");
return 0;
}
parse_cmdline(CMDFILE);
/* handle relative paths, append content dir if needed */
for (i = 1; i < ARGUC; i++)
{
if (!is_path_absolute(ARGUV[i]))
{
char tmp[2048] = { 0 };
strcpy(tmp, ARGUV[i]);
ARGUV[i][0] = '\0';
sprintf(ARGUV[i], "%s%c%s", base_dir, SLASH, tmp);
}
}
}
else if (handle_extension((char*)argv, "m3u") || handle_extension((char*)argv, "M3U"))
{
if (!read_m3u((char*)argv))
{
if (log_cb)
log_cb(RETRO_LOG_ERROR, "%s\n", "[libretro]: failed to read m3u file ...");
return 0;
}
if(disk.total_images > 1)
{
sprintf((char*)argv, "%s \"%s\" \"%s\"", "px68k", disk.path[0], disk.path[1]);
disk.inserted[1] = true;
}
else
sprintf((char*)argv, "%s \"%s\"", "px68k", disk.path[0]);
disk.inserted[0] = true;
parse_cmdline(argv);
}
}
return 1;
}
#define MEM_SIZE 0xc00000
static int WinX68k_Init(void)
{
IPL = (uint8_t*)malloc(0x40000);
MEM = (uint8_t*)malloc(MEM_SIZE);
FONT = (uint8_t*)malloc(0xc0000);
if (MEM)
memset(MEM, 0, MEM_SIZE);
if (MEM && FONT && IPL)
{
/* m68000_init(); */
return 1;
}
return 0;
}
static void WinX68k_SCSICheck(void)
{
static const uint8_t SCSIIMG[] = {
0x00, 0xfc, 0x00, 0x14, /* $fc0000 SCSI boot entry address */
0x00, 0xfc, 0x00, 0x16, /* $fc0004 IOCS vector setting entry
address (always before "Human" 8 bytes) */
0x00, 0x00, 0x00, 0x00, /* $fc0008 ? */
0x48, 0x75, 0x6d, 0x61, /* $fc000c ↓ */
0x6e, 0x36, 0x38, 0x6b, /* $fc0010 ID "Human68k" (always just
before start-up entry point) */
0x4e, 0x75, /* $fc0014 "rts" (start-up entry point)
*/
0x23, 0xfc, 0x00, 0xfc, 0x00, 0x2a, /* $fc0016 ↓ (IOCS vector setting
entry point) */
0x00, 0x00, 0x07, 0xd4, /* $fc001c "move.l #$fc002a, $7d4.l" */
0x74, 0xff, /* $fc0020 "moveq #-1, d2" */
0x4e, 0x75, /* $fc0022 "rts" */
0x44, 0x55, 0x4d, 0x4d, 0x59, 0x20, /* $fc0024 ID "DUMMY " */
0x70, 0xff, /* $fc002a "moveq #-1, d0" (SCSI IOCS call
entry point) */
0x4e, 0x75, /* $fc002c "rts" */
};
int i;
uint16_t *p1, *p2;
int scsi = 0;
for (i = 0x30600; i < 0x30c00; i += 2)
{
p1 = (uint16_t *)(&IPL[i]);
p2 = p1 + 1;
/* xxx: works only for little endian guys */
if (*p1 == 0xfc00 && *p2 == 0x0000)
{
scsi = 1;
break;
}
}
/* SCSI model time */
if (scsi)
{
memset(IPL, 0, 0x2000); /* main is 8kb */
memset(&IPL[0x2000], 0xff, 0x1e000); /* remaining is 0xff */
memcpy(IPL, SCSIIMG, sizeof(SCSIIMG)); /* fakeSCSI BIOS */
}
else /* SASI model sees the IPL as it is */
memcpy(IPL, &IPL[0x20000], 0x20000);
}
#define NELEMENTS(array) ((int)(sizeof(array) / sizeof(array[0])))
static int WinX68k_LoadROMs(void)
{
static const char *BIOSFILE[] = {
"iplrom.dat", "iplrom30.dat", "iplromco.dat", "iplromxv.dat"
};
static const char FONTFILE[] = "cgrom.dat";
static const char FONTFILETMP[] = "cgrom.tmp";
void *fp;
int i;
uint8_t tmp;
for (fp = 0, i = 0; fp == 0 && i < NELEMENTS(BIOSFILE); ++i)
fp = file_open_c((char *)BIOSFILE[i]);
if (fp == 0)
{
if (log_cb)
log_cb(RETRO_LOG_ERROR, "[PX68K] Error: BIOS ROM image can't be found.\n");
return 0;
}
file_lread(fp, &IPL[0x20000], 0x20000);
file_close(fp);
/* if SCSI IPL, SCSI BIOS is established around $fc0000 */
WinX68k_SCSICheck();
for (i = 0; i < 0x40000; i += 2) {
tmp = IPL[i];
IPL[i] = IPL[i + 1];
IPL[i + 1] = tmp;
}
fp = file_open_c((char *)FONTFILE);
if (fp == 0)
{
/* cgrom.tmp present? */
fp = file_open_c((char *)FONTFILETMP);
/* font creation XXX - Font ROM image can't be found */
if (fp == 0)
return 0;
}
file_lread(fp, FONT, 0xc0000);
file_close(fp);
return 1;
}
static void WinX68k_Cleanup(void)
{
if (IPL)
free(IPL);
if (MEM)
free(MEM);
if (FONT)
free(FONT);
IPL = NULL;
MEM = NULL;
FONT = NULL;
}
void WinX68k_Reset(void)
{
OPM_Reset();
#if defined (HAVE_CYCLONE)
m68000_reset();
m68000_set_reg(M68K_A7, (IPL[0x30001]<<24)|(IPL[0x30000]<<16)|(IPL[0x30003]<<8)|IPL[0x30002]);
m68000_set_reg(M68K_PC, (IPL[0x30005]<<24)|(IPL[0x30004]<<16)|(IPL[0x30007]<<8)|IPL[0x30006]);
#elif defined (HAVE_C68K)
C68k_Reset(&C68K);
#if 0
C68k_Set_Reg(&C68K, C68K_A7, (IPL[0x30001]<<24)|(IPL[0x30000]<<16)|(IPL[0x30003]<<8)|IPL[0x30002]);
C68k_Set_Reg(&C68K, C68K_PC, (IPL[0x30005]<<24)|(IPL[0x30004]<<16)|(IPL[0x30007]<<8)|IPL[0x30006]);
#endif
C68k_Set_AReg(&C68K, 7, (IPL[0x30001]<<24)|(IPL[0x30000]<<16)|(IPL[0x30003]<<8)|IPL[0x30002]);
C68k_Set_PC(&C68K, (IPL[0x30005]<<24)|(IPL[0x30004]<<16)|(IPL[0x30007]<<8)|IPL[0x30006]);
#elif defined (HAVE_MUSASHI)
m68k_pulse_reset();
m68k_set_reg(M68K_REG_A7, (IPL[0x30001]<<24)|(IPL[0x30000]<<16)|(IPL[0x30003]<<8)|IPL[0x30002]);
m68k_set_reg(M68K_REG_PC, (IPL[0x30005]<<24)|(IPL[0x30004]<<16)|(IPL[0x30007]<<8)|IPL[0x30006]);
#endif /* HAVE_C68K */ /* HAVE_MUSASHI */
Memory_Init();
CRTC_Init();
DMA_Init();
MFP_Init();
FDC_Init();
FDD_Reset();
SASI_Init();
SCSI_Init();
IOC_Init();
SCC_Init();
PIA_Init();
RTC_Init();
TVRAM_Init();
GVRAM_Init();
BG_Init();
Pal_Init();
IRQH_Init();
MIDI_Init();
Keyboard_Init();
m68000_ICountBk = 0;
ICount = 0;
DSound_Stop();
SRAM_VirusCheck();
#if 0
CDROM_Init();
#endif
DSound_Play();
}
extern char filepath[MAX_PATH];
static int pmain(int argc, char *argv[])
{
strcpy(winx68k_dir, retro_system_conf);
sprintf(winx68k_ini, "%s%cconfig", retro_system_conf, SLASH);
file_setcd(winx68k_dir);
LoadConfig();
/* if available, use retro_browse_conf to set StartDir config */
if (retro_browse_conf[0] != 0)
strcpy(filepath, retro_browse_conf);
if (!WinDraw_MenuInit())
{
WinX68k_Cleanup();
WinDraw_Cleanup();
return 1;
}
StatBar_Show(Config.WindowFDDStat);
WinUI_Init();
#if 0
/* TODO: CLean this up */
if (!WinX68k_Init())
{
WinX68k_Cleanup();
WinDraw_Cleanup();
return 1;
}
#endif
m68000_init();
if (!WinX68k_LoadROMs())
{