enabled scph-1110 analog joystick in the menu
[pcsx_rearmed.git] / frontend / libretro.c
index 98c0dee..7fa63cb 100644 (file)
 #define MIN(a, b) ((a) < (b) ? (a) : (b))
 #endif
 
+#ifndef MAX
+#define MAX(a, b) ((a) > (b) ? (a) : (b))
+#endif
+
 #define ISHEXDEC ((buf[cursor]>='0') && (buf[cursor]<='9')) || ((buf[cursor]>='a') && (buf[cursor]<='f')) || ((buf[cursor]>='A') && (buf[cursor]<='F'))
 
 //hack to prevent retroarch freezing when reseting in the menu but not while running with the hot key
@@ -54,6 +58,8 @@ static retro_input_state_t input_state_cb;
 static retro_environment_t environ_cb;
 static retro_audio_sample_batch_t audio_batch_cb;
 static struct retro_rumble_interface rumble;
+static struct retro_log_callback logging;
+static retro_log_printf_t log_cb;
 
 static void *vout_buf;
 static void * vout_buf_ptr;
@@ -83,6 +89,25 @@ int multitap1 = 0;
 int multitap2 = 0;
 int in_enable_vibration = 1;
 
+// NegCon adjustment parameters
+// > The NegCon 'twist' action is somewhat awkward when mapped
+//   to a standard analog stick -> user should be able to tweak
+//   response/deadzone for comfort
+// > When response is linear, 'additional' deadzone (set here)
+//   may be left at zero, since this is normally handled via in-game
+//   options menus
+// > When response is non-linear, deadzone should be set to match the
+//   controller being used (otherwise precision may be lost)
+// > negcon_linearity:
+//   - 1: Response is linear - recommended when using racing wheel
+//        peripherals, not recommended for standard gamepads
+//   - 2: Response is quadratic - optimal setting for gamepads
+//   - 3: Response is cubic - enables precise fine control, but
+//        difficult to use...
+#define NEGCON_RANGE 0x7FFF
+static int negcon_deadzone = 0;
+static int negcon_linearity = 1;
+
 /* PSX max resolution is 640x512, but with enhancement it's 1024x512 */
 #define VOUT_MAX_WIDTH 1024
 #define VOUT_MAX_HEIGHT 512
@@ -129,24 +154,26 @@ static void init_memcard(char *mcd_data)
        }
 }
 
-static void vout_set_mode(int w, int h, int raw_w, int raw_h, int bpp)
+static void set_vout_fb()
 {
-       vout_width = w;
-       vout_height = h;
-
   struct retro_framebuffer fb = {0};
 
   fb.width           = vout_width;
   fb.height          = vout_height;
   fb.access_flags    = RETRO_MEMORY_ACCESS_WRITE;
 
-  vout_buf_ptr = vout_buf;
-
   if (environ_cb(RETRO_ENVIRONMENT_GET_CURRENT_SOFTWARE_FRAMEBUFFER, &fb) && fb.format == RETRO_PIXEL_FORMAT_RGB565)
-  {
-     vout_buf_ptr  = (uint16_t*)fb.data;
-  }
+     vout_buf_ptr = (uint16_t*)fb.data;
+  else
+     vout_buf_ptr = vout_buf;
+}
 
+static void vout_set_mode(int w, int h, int raw_w, int raw_h, int bpp)
+{
+  vout_width = w;
+  vout_height = h;
+
+  set_vout_fb();
 }
 
 #ifndef FRONTEND_SUPPORTS_RGB565
@@ -435,18 +462,22 @@ void retro_set_environment(retro_environment_t cb)
 {
    static const struct retro_variable vars[] = {
       { "pcsx_rearmed_frameskip", "Frameskip; 0|1|2|3" },
-      { "pcsx_rearmed_region", "Region; Auto|NTSC|PAL" },
-      { "pcsx_rearmed_pad1type", "Pad 1 Type; default|none|standard|analog|negcon" },
-      { "pcsx_rearmed_pad2type", "Pad 2 Type; default|none|standard|analog|negcon" },
-      { "pcsx_rearmed_pad3type", "Pad 3 Type; default|none|standard|analog|negcon" },
-      { "pcsx_rearmed_pad4type", "Pad 4 Type; default|none|standard|analog|negcon" },
-      { "pcsx_rearmed_pad5type", "Pad 5 Type; default|none|standard|analog|negcon" },
-      { "pcsx_rearmed_pad6type", "Pad 6 Type; default|none|standard|analog|negcon" },
-      { "pcsx_rearmed_pad7type", "Pad 7 Type; default|none|standard|analog|negcon" },
-      { "pcsx_rearmed_pad8type", "Pad 8 Type; default|none|standard|analog|negcon" },
+      { "pcsx_rearmed_region", "Region; auto|NTSC|PAL" },
+      { "pcsx_rearmed_memcard2", "Enable second memory card; disabled|enabled" },
+      { "pcsx_rearmed_pad1type", "Pad 1 Type; default|none|standard|analog|dualshock|negcon" },
+      { "pcsx_rearmed_pad2type", "Pad 2 Type; default|none|standard|analog|dualshock|negcon" },
+      { "pcsx_rearmed_pad3type", "Pad 3 Type; default|none|standard|analog|dualshock|negcon" },
+      { "pcsx_rearmed_pad4type", "Pad 4 Type; default|none|standard|analog|dualshock|negcon" },
+      { "pcsx_rearmed_pad5type", "Pad 5 Type; default|none|standard|analog|dualshock|negcon" },
+      { "pcsx_rearmed_pad6type", "Pad 6 Type; default|none|standard|analog|dualshock|negcon" },
+      { "pcsx_rearmed_pad7type", "Pad 7 Type; default|none|standard|analog|dualshock|negcon" },
+      { "pcsx_rearmed_pad8type", "Pad 8 Type; default|none|standard|analog|dualshock|negcon" },
       { "pcsx_rearmed_multitap1", "Multitap 1; auto|disabled|enabled" },
       { "pcsx_rearmed_multitap2", "Multitap 2; auto|disabled|enabled" },
+      { "pcsx_rearmed_negcon_deadzone", "NegCon Twist Deadzone (percent); 0|5|10|15|20|25|30" },
+      { "pcsx_rearmed_negcon_response", "NegCon Twist Response; linear|quadratic|cubic" },
       { "pcsx_rearmed_vibration", "Enable Vibration; enabled|disabled" },
+      { "pcsx_rearmed_dithering", "Enable Dithering; enabled|disabled" },
 #ifndef DRC_DISABLE
       { "pcsx_rearmed_drc", "Dynamic recompiler; enabled|disabled" },
 #endif
@@ -464,6 +495,9 @@ void retro_set_environment(retro_environment_t cb)
       { NULL, NULL },
    };
 
+    if (cb(RETRO_ENVIRONMENT_GET_LOG_INTERFACE, &logging))
+        log_cb = logging.log;
+
    environ_cb = cb;
 
    cb(RETRO_ENVIRONMENT_SET_VARIABLES, (void*)vars);
@@ -531,6 +565,8 @@ static void update_controller_port_variable(unsigned port)
                if (strcmp(var.value, "standard") == 0)
                        in_type[port] = PSE_PAD_TYPE_STANDARD;
                else if (strcmp(var.value, "analog") == 0)
+                       in_type[port] = PSE_PAD_TYPE_ANALOGJOY;
+               else if (strcmp(var.value, "dualshock") == 0)
                        in_type[port] = PSE_PAD_TYPE_ANALOGPAD;
                else if (strcmp(var.value, "negcon") == 0)
                        in_type[port] = PSE_PAD_TYPE_NEGCON;
@@ -1218,7 +1254,7 @@ bool retro_load_game(const struct retro_game_info *info)
 
        if (is_m3u) {
                if (!read_m3u(info->path)) {
-                       SysPrintf("failed to read m3u file\n");
+                       log_cb(RETRO_LOG_INFO, "failed to read m3u file\n");
                        return false;
                }
        } else {
@@ -1230,7 +1266,7 @@ bool retro_load_game(const struct retro_game_info *info)
 
        /* have to reload after set_cd_image for correct cdr plugin */
        if (LoadPlugins() == -1) {
-               SysPrintf("failed to load plugins\n");
+               log_cb(RETRO_LOG_INFO, "failed to load plugins\n");
                return false;
        }
 
@@ -1238,23 +1274,22 @@ bool retro_load_game(const struct retro_game_info *info)
        NetOpened = 0;
 
        if (OpenPlugins() == -1) {
-               SysPrintf("failed to open plugins\n");
+               log_cb(RETRO_LOG_INFO, "failed to open plugins\n");
                return false;
        }
 
        plugin_call_rearmed_cbs();
        dfinput_activate();
 
-       Config.PsxAuto = 1;
        if (CheckCdrom() == -1) {
-               SysPrintf("unsupported/invalid CD image: %s\n", info->path);
+        log_cb(RETRO_LOG_INFO, "unsupported/invalid CD image: %s\n", info->path);
                return false;
        }
 
        SysReset();
 
        if (LoadCdrom() == -1) {
-               SysPrintf("could not load CD-ROM!\n");
+               log_cb(RETRO_LOG_INFO, "could not load CD\n");
                return false;
        }
        emu_on_new_cd(0);
@@ -1334,7 +1369,7 @@ static void update_variables(bool in_flight)
    if (environ_cb(RETRO_ENVIRONMENT_GET_VARIABLE, &var) || var.value)
    {
       Config.PsxAuto = 0;
-      if (strcmp(var.value, "Automatic") == 0)
+      if (strcmp(var.value, "auto") == 0)
          Config.PsxAuto = 1;
       else if (strcmp(var.value, "NTSC") == 0)
          Config.PsxType = 0;
@@ -1347,6 +1382,26 @@ static void update_variables(bool in_flight)
 
    update_multitap();
 
+   var.value = NULL;
+   var.key = "pcsx_rearmed_negcon_deadzone";
+   negcon_deadzone = 0;
+   if (environ_cb(RETRO_ENVIRONMENT_GET_VARIABLE, &var) || var.value)
+   {
+      negcon_deadzone = (int)(atoi(var.value) * 0.01f * NEGCON_RANGE);
+   }
+
+   var.value = NULL;
+   var.key = "pcsx_rearmed_negcon_response";
+   negcon_linearity = 1;
+   if (environ_cb(RETRO_ENVIRONMENT_GET_VARIABLE, &var) || var.value)
+   {
+      if (strcmp(var.value, "quadratic") == 0){
+         negcon_linearity = 2;
+      } else if (strcmp(var.value, "cubic") == 0){
+         negcon_linearity = 3;
+      }
+   }
+
    var.value = NULL;
    var.key = "pcsx_rearmed_vibration";
 
@@ -1358,6 +1413,27 @@ static void update_variables(bool in_flight)
          in_enable_vibration = 1;
    }
 
+   var.value = NULL;
+   var.key = "pcsx_rearmed_dithering";
+
+   if (environ_cb(RETRO_ENVIRONMENT_GET_VARIABLE, &var) || var.value)
+   {
+      if (strcmp(var.value, "disabled") == 0) {
+         pl_rearmed_cbs.gpu_peops.iUseDither = 0;
+         pl_rearmed_cbs.gpu_peopsgl.bDrawDither = 0;
+#ifdef __ARM_NEON__
+         pl_rearmed_cbs.gpu_neon.allow_dithering = 0;
+#endif
+      }
+      else if (strcmp(var.value, "enabled") == 0) {
+         pl_rearmed_cbs.gpu_peops.iUseDither = 1;
+         pl_rearmed_cbs.gpu_peopsgl.bDrawDither = 1;
+#ifdef __ARM_NEON__
+         pl_rearmed_cbs.gpu_neon.allow_dithering = 1;
+#endif
+      }
+   }
+
 #ifdef __ARM_NEON__
    var.value = "NULL";
    var.key = "pcsx_rearmed_neon_interlace_enable";
@@ -1506,6 +1582,38 @@ static void update_variables(bool in_flight)
    }
 }
 
+// Taken from beetle-psx-libretro
+static uint16_t get_analog_button(retro_input_state_t input_state_cb, int player_index, int id)
+{
+       uint16_t button;
+
+       // NOTE: Analog buttons were added Nov 2017. Not all front-ends support this
+       // feature (or pre-date it) so we need to handle this in a graceful way.
+
+       // First, try and get an analog value using the new libretro API constant
+       button = input_state_cb(player_index,
+                                                                       RETRO_DEVICE_ANALOG,
+                                                                       RETRO_DEVICE_INDEX_ANALOG_BUTTON,
+                                                                       id);
+       button = MIN(button / 128, 255);
+
+       if (button == 0)
+       {
+               // If we got exactly zero, we're either not pressing the button, or the front-end
+               // is not reporting analog values. We need to do a second check using the classic
+               // digital API method, to at least get some response - better than nothing.
+
+               // NOTE: If we're really just not holding the button, we're still going to get zero.
+
+               button = input_state_cb(player_index,
+                                                                               RETRO_DEVICE_JOYPAD,
+                                                                               0,
+                                                                               id) ? 255 : 0;
+       }
+
+       return button;
+}
+
 void retro_run(void)
 {
     int i;
@@ -1523,23 +1631,148 @@ void retro_run(void)
 
        // reset all keystate, query libretro for keystate
        int j;
+       int lsx;
+       int rsy;
+       float negcon_twist_amplitude;
+       int negcon_i_rs;
+       int negcon_ii_rs;
        for(i = 0; i < PORTS_NUMBER; i++) {
                in_keystate[i] = 0;
 
                if (in_type[i] == PSE_PAD_TYPE_NONE)
                        continue;
 
-               // query libretro for keystate
-               for (j = 0; j < RETRO_PSX_MAP_LEN; j++)
-                       if (input_state_cb(i, RETRO_DEVICE_JOYPAD, 0, j))
-                               in_keystate[i] |= retro_psx_map[j];
-
-               if (in_type[i] == PSE_PAD_TYPE_ANALOGPAD)
+               if (in_type[i] == PSE_PAD_TYPE_NEGCON)
+               {
+                       // Query digital inputs
+                       //
+                       // > Pad-Up
+                       if (input_state_cb(i, RETRO_DEVICE_JOYPAD, 0, RETRO_DEVICE_ID_JOYPAD_UP)){
+                               in_keystate[i] |= (1 << DKEY_UP);
+                       }
+                       // > Pad-Right
+                       if (input_state_cb(i, RETRO_DEVICE_JOYPAD, 0, RETRO_DEVICE_ID_JOYPAD_RIGHT)){
+                               in_keystate[i] |= (1 << DKEY_RIGHT);
+                       }
+                       // > Pad-Down
+                       if (input_state_cb(i, RETRO_DEVICE_JOYPAD, 0, RETRO_DEVICE_ID_JOYPAD_DOWN)){
+                               in_keystate[i] |= (1 << DKEY_DOWN);
+                       }
+                       // > Pad-Left
+                       if (input_state_cb(i, RETRO_DEVICE_JOYPAD, 0, RETRO_DEVICE_ID_JOYPAD_LEFT)){
+                               in_keystate[i] |= (1 << DKEY_LEFT);
+                       }
+                       // > Start
+                       if (input_state_cb(i, RETRO_DEVICE_JOYPAD, 0, RETRO_DEVICE_ID_JOYPAD_START)){
+                               in_keystate[i] |= (1 << DKEY_START);
+                       }
+                       // > neGcon A
+                       if (input_state_cb(i, RETRO_DEVICE_JOYPAD, 0, RETRO_DEVICE_ID_JOYPAD_A)){
+                               in_keystate[i] |= (1 << DKEY_CIRCLE);
+                       }
+                       // > neGcon B
+                       if (input_state_cb(i, RETRO_DEVICE_JOYPAD, 0, RETRO_DEVICE_ID_JOYPAD_X)){
+                               in_keystate[i] |= (1 << DKEY_TRIANGLE);
+                       }
+                       // > neGcon R shoulder (digital)
+                       if (input_state_cb(i, RETRO_DEVICE_JOYPAD, 0, RETRO_DEVICE_ID_JOYPAD_R)){
+                               in_keystate[i] |= (1 << DKEY_R1);
+                       }
+                       // Query analog inputs
+                       //
+                       // From studying 'libpcsxcore/plugins.c' and 'frontend/plugin.c':
+                       // >> pad->leftJoyX  == in_analog_left[i][0]  == NeGcon II
+                       // >> pad->leftJoyY  == in_analog_left[i][1]  == NeGcon L
+                       // >> pad->rightJoyX == in_analog_right[i][0] == NeGcon twist
+                       // >> pad->rightJoyY == in_analog_right[i][1] == NeGcon I
+                       // So we just have to map in_analog_left/right to more
+                       // appropriate inputs...
+                       //
+                       // > NeGcon twist
+                       // >> Get raw analog stick value and account for deadzone
+                       lsx = input_state_cb(i, RETRO_DEVICE_ANALOG, RETRO_DEVICE_INDEX_ANALOG_LEFT, RETRO_DEVICE_ID_ANALOG_X);
+                       if (lsx > negcon_deadzone){
+                               lsx = lsx - negcon_deadzone;
+                       } else if (lsx < -negcon_deadzone){
+                               lsx = lsx + negcon_deadzone;
+                       } else {
+                               lsx = 0;
+                       }
+                       // >> Convert to an 'amplitude' [-1.0,1.0] and adjust response
+                       negcon_twist_amplitude = (float)lsx / (float)(NEGCON_RANGE - negcon_deadzone);
+                       if (negcon_linearity == 2){
+                               if (negcon_twist_amplitude < 0.0){
+                                       negcon_twist_amplitude = -(negcon_twist_amplitude * negcon_twist_amplitude);
+                               } else {
+                                       negcon_twist_amplitude = negcon_twist_amplitude * negcon_twist_amplitude;
+                               }
+                       } else if (negcon_linearity == 3){
+                               negcon_twist_amplitude = negcon_twist_amplitude * negcon_twist_amplitude * negcon_twist_amplitude;
+                       }
+                       // >> Convert to final 'in_analog' integer value [0,255]
+                       in_analog_right[i][0] = MAX(MIN((int)(negcon_twist_amplitude * 128.0f) + 128, 255), 0);
+                       // > NeGcon I + II
+                       // >> Handle right analog stick vertical axis mapping...
+                       //    - Up (-Y) == accelerate == neGcon I
+                       //    - Down (+Y) == brake == neGcon II
+                       negcon_i_rs = 0;
+                       negcon_ii_rs = 0;
+                       rsy = input_state_cb(i, RETRO_DEVICE_ANALOG, RETRO_DEVICE_INDEX_ANALOG_RIGHT, RETRO_DEVICE_ID_ANALOG_Y);
+                       if (rsy >= 0){
+                               // Account for deadzone
+                               // (Note: have never encountered a gamepad with significant differences
+                               // in deadzone between left/right analog sticks, so use the regular 'twist'
+                               // deadzone here)
+                               if (rsy > negcon_deadzone){
+                                       rsy = rsy - negcon_deadzone;
+                               } else {
+                                       rsy = 0;
+                               }
+                               // Convert to 'in_analog' integer value [0,255]
+                               negcon_ii_rs = MIN((int)(((float)rsy / (float)(NEGCON_RANGE - negcon_deadzone)) * 255.0f), 255);
+                       } else {
+                               if (rsy < -negcon_deadzone){
+                                       rsy = -1 * (rsy + negcon_deadzone);
+                               } else {
+                                       rsy = 0;
+                               }
+                               negcon_i_rs = MIN((int)(((float)rsy / (float)(NEGCON_RANGE - negcon_deadzone)) * 255.0f), 255);
+                       }
+                       // >> NeGcon I
+                       in_analog_right[i][1] = MAX(
+                               MAX(
+                                       get_analog_button(input_state_cb, i, RETRO_DEVICE_ID_JOYPAD_R2),
+                                       get_analog_button(input_state_cb, i, RETRO_DEVICE_ID_JOYPAD_B)
+                               ),
+                               negcon_i_rs
+                       );
+                       // >> NeGcon II
+                       in_analog_left[i][0] = MAX(
+                               MAX(
+                                       get_analog_button(input_state_cb, i, RETRO_DEVICE_ID_JOYPAD_L2),
+                                       get_analog_button(input_state_cb, i, RETRO_DEVICE_ID_JOYPAD_Y)
+                               ),
+                               negcon_ii_rs
+                       );
+                       // > NeGcon L
+                       in_analog_left[i][1] = get_analog_button(input_state_cb, i, RETRO_DEVICE_ID_JOYPAD_L);
+               }
+               else
                {
-                       in_analog_left[i][0] = MIN((input_state_cb(i, RETRO_DEVICE_ANALOG, RETRO_DEVICE_INDEX_ANALOG_LEFT, RETRO_DEVICE_ID_ANALOG_X) / 255) + 128, 255);
-                       in_analog_left[i][1] = MIN((input_state_cb(i, RETRO_DEVICE_ANALOG, RETRO_DEVICE_INDEX_ANALOG_LEFT, RETRO_DEVICE_ID_ANALOG_Y) / 255) + 128, 255);
-                       in_analog_right[i][0] = MIN((input_state_cb(i, RETRO_DEVICE_ANALOG, RETRO_DEVICE_INDEX_ANALOG_RIGHT, RETRO_DEVICE_ID_ANALOG_X) / 255) + 128, 255);
-                       in_analog_right[i][1] = MIN((input_state_cb(i, RETRO_DEVICE_ANALOG, RETRO_DEVICE_INDEX_ANALOG_RIGHT, RETRO_DEVICE_ID_ANALOG_Y) / 255) + 128, 255);
+                       // Query digital inputs
+                       for (j = 0; j < RETRO_PSX_MAP_LEN; j++){
+                               if (input_state_cb(i, RETRO_DEVICE_JOYPAD, 0, j)){
+                                       in_keystate[i] |= retro_psx_map[j];
+                               }
+                       }
+                       // Query analog inputs
+                       if (in_type[i] == PSE_PAD_TYPE_ANALOGJOY || in_type[i] == PSE_PAD_TYPE_ANALOGPAD)
+                       {
+                               in_analog_left[i][0] = MIN((input_state_cb(i, RETRO_DEVICE_ANALOG, RETRO_DEVICE_INDEX_ANALOG_LEFT, RETRO_DEVICE_ID_ANALOG_X) / 255) + 128, 255);
+                               in_analog_left[i][1] = MIN((input_state_cb(i, RETRO_DEVICE_ANALOG, RETRO_DEVICE_INDEX_ANALOG_LEFT, RETRO_DEVICE_ID_ANALOG_Y) / 255) + 128, 255);
+                               in_analog_right[i][0] = MIN((input_state_cb(i, RETRO_DEVICE_ANALOG, RETRO_DEVICE_INDEX_ANALOG_RIGHT, RETRO_DEVICE_ID_ANALOG_X) / 255) + 128, 255);
+                               in_analog_right[i][1] = MIN((input_state_cb(i, RETRO_DEVICE_ANALOG, RETRO_DEVICE_INDEX_ANALOG_RIGHT, RETRO_DEVICE_ID_ANALOG_Y) / 255) + 128, 255);
+                       }
                }
        }
 
@@ -1549,6 +1782,8 @@ void retro_run(void)
        video_cb((vout_fb_dirty || !vout_can_dupe || !duping_enable) ? vout_buf_ptr : NULL,
                vout_width, vout_height, vout_width * 2);
        vout_fb_dirty = 0;
+
+    set_vout_fb();
 }
 
 static bool try_use_bios(const char *path)
@@ -1593,7 +1828,7 @@ static bool find_any_bios(const char *dirpath, char *path, size_t path_size)
                if (strncasecmp(ent->d_name, "scph", 4) != 0)
                        continue;
 
-               snprintf(path, path_size, "%s/%s", dirpath, ent->d_name);
+               snprintf(path, path_size, "%s%c%s", dirpath, SLASH, ent->d_name);
                ret = try_use_bios(path);
                if (ret)
                        break;
@@ -1611,9 +1846,47 @@ static void check_system_specs(void)
    environ_cb(RETRO_ENVIRONMENT_SET_PERFORMANCE_LEVEL, &level);
 }
 
+static int init_memcards(void)
+{
+       int ret = 0;
+       const char *dir;
+       struct retro_variable var = { .key="pcsx_rearmed_memcard2", .value=NULL };
+       static const char CARD2_FILE[] = "pcsx-card2.mcd";
+
+       McdDisable[0] = 0;
+       // Disable memcard 2 by default
+       McdDisable[1] = 1;
+       init_memcard(Mcd1Data);
+       // Memcard 2 is managed by the emulator on the filesystem,
+       // There is no need to initialize Mcd2Data like Mcd1Data.
+
+       if (environ_cb(RETRO_ENVIRONMENT_GET_VARIABLE, &var) && var.value) {
+               SysPrintf("Memcard 2: %s\n", var.value);
+               if (memcmp(var.value, "enabled", 7) == 0) {
+                       if (environ_cb(RETRO_ENVIRONMENT_GET_SAVE_DIRECTORY, &dir) && dir) {
+                               if (strlen(dir) + strlen(CARD2_FILE) + 2 > sizeof(Config.Mcd2)) {
+                                       SysPrintf("Path '%s' is too long. Cannot use memcard 2. Use a shorter path.\n", dir);
+                                       ret = -1;
+                               } else {
+                                       McdDisable[1] = 0;
+                                       snprintf(Config.Mcd2, sizeof(Config.Mcd2), "%s/%s", dir, CARD2_FILE);
+                                       SysPrintf("Use memcard 2: %s\n", Config.Mcd2);
+                               }
+                       } else {
+                               SysPrintf("Could not get save directory! Could not create memcard 2.");
+                               ret = -1;
+                       }
+               }
+       }
+       return ret;
+}
+
 void retro_init(void)
 {
-       const char *bios[] = { "scph1001", "scph5501", "scph7001" };
+       const char *bios[] = {
+               "SCPH101", "SCPH7001", "SCPH5501", "SCPH1001",
+               "scph101", "scph7001", "scph5501", "scph1001"
+       };
        const char *dir;
        char path[256];
        int i, ret;
@@ -1641,6 +1914,7 @@ void retro_init(void)
    if(!__ctr_svchax)
       Config.Cpu = CPU_INTERPRETER;
 #endif
+       ret |= init_memcards();
 
        ret |= emu_core_init();
        if (ret != 0) {
@@ -1663,7 +1937,7 @@ void retro_init(void)
                snprintf(Config.BiosDir, sizeof(Config.BiosDir), "%s", dir);
 
                for (i = 0; i < sizeof(bios) / sizeof(bios[0]); i++) {
-                       snprintf(path, sizeof(path), "%s/%s.bin", dir, bios[i]);
+                       snprintf(path, sizeof(path), "%s%c%s.bin", dir, SLASH, bios[i]);
                        found_bios = try_use_bios(path);
                        if (found_bios)
                                break;
@@ -1680,7 +1954,7 @@ void retro_init(void)
                SysPrintf("no BIOS files found.\n");
                struct retro_message msg =
                {
-                       "No BIOS file found - add for better compatibility",
+                       "No PlayStation BIOS file found - add for better compatibility",
                        180
                };
                environ_cb(RETRO_ENVIRONMENT_SET_MESSAGE, (void*)&msg);
@@ -1700,11 +1974,6 @@ void retro_init(void)
        pl_rearmed_cbs.gpu_peops.iUseDither = 1;
        spu_config.iUseFixedUpdates = 1;
 
-       McdDisable[0] = 0;
-       McdDisable[1] = 1;
-       init_memcard(Mcd1Data);
-   init_memcard(Mcd2Data);
-
        SaveFuncs.open = save_open;
        SaveFuncs.read = save_read;
        SaveFuncs.write = save_write;