added support for one EEPROM game, code cleanup

Makefile.wii

@@ -26,7 +26,7 @@ INCLUDES	:=	source source/m68k source/z80 source/sound source/sound/SRC source/n
 # options for code generation
 #---------------------------------------------------------------------------------
 
-CFLAGS	= -O3 -mrvl -Wall $(MACHDEP) -Wno-strict-aliasing $(INCLUDE) -DWORDS_BIGENDIAN -DNGC="1" -DHW_RVL
+CFLAGS	= -O3 -g -mrvl -Wall $(MACHDEP) -Wno-strict-aliasing $(INCLUDE) -DWORDS_BIGENDIAN -DNGC="1" -DHW_RVL
 CXXFLAGS	=	$(CFLAGS)
 
 LDFLAGS	=	$(MACHDEP) -Wl,-Map,$(notdir $@).map

source/cart_hw/eeprom.c

@@ -28,7 +28,7 @@ typedef struct
   T_EEPROM_TYPE type;
 } T_GAME_ENTRY;
 
-T_GAME_ENTRY database[24] = 
+T_GAME_ENTRY database[25] = 
 {
   /* ACCLAIM mappers */
   /* 24C02 (old mapper) */
@@ -57,6 +57,7 @@ T_GAME_ENTRY database[24] =
   {{"PR-1993"    }, 0,      {7,  0x7F,   0x7F,   0x200001, 0x200001, 0x200001, 0, 0, 1}},   /* Greatest Heavyweights of the Ring (E) */
   {{"G-4060"     }, 0,      {7,  0x7F,   0x7F,   0x200001, 0x200001, 0x200001, 0, 0, 1}},   /* Wonderboy in Monster World */
   {{"00001211-00"}, 0,      {7,  0x7F,   0x7F,   0x200001, 0x200001, 0x200001, 0, 0, 1}},   /* Sports Talk Baseball */
+  {{"00004076-00"}, 0,      {7,  0x7F,   0x7F,   0x200001, 0x200001, 0x200001, 0, 0, 1}},   /* Honoo no Toukyuuji Dodge Danpei */
 
   /* CODEMASTERS mapper */
   /* 24C01 */

source/cart_hw/sram.c

@@ -45,7 +45,7 @@ void sram_init()
   memset (&sram.sram[0], 0xFF, 0x10000);
   sram.crc = crc32 (0, &sram.sram[0], 0x10000);
 
-  if ((cart_rom[0x1b0] == 0x52) && (cart_rom[0x1b1] == 0x41))
+  if ((READ_BYTE(cart_rom,0x1b0) == 0x52) && (READ_BYTE(cart_rom,0x1b1) == 0x41))
   {
     /* retrieve informations from headezr */
     sram.detected = 1;

source/ngc/gui/menu.c

@@ -1136,7 +1136,8 @@ void MainMenu ()
 
   /* Switch to menu default rendering mode (60hz or 50hz, but always 480 lines) */
   VIDEO_Configure (vmode);
-  VIDEO_ClearFrameBuffer(vmode, xfb[whichfb], COLOR_BLACK);
+  VIDEO_ClearFrameBuffer(vmode, xfb[0], COLOR_BLACK);
+  VIDEO_ClearFrameBuffer(vmode, xfb[1], COLOR_BLACK);
   VIDEO_Flush();
   VIDEO_WaitVSync();
   VIDEO_WaitVSync();
@@ -1221,11 +1222,11 @@ void MainMenu ()
   while (WPAD_ButtonsHeld(0)) WPAD_ScanPads();
 #endif
 
-  /*** Reinitialize GX ***/
-  VIDEO_ClearFrameBuffer(vmode, xfb[whichfb], COLOR_BLACK);
+  /*** Reinitialize VIDEO ***/
+  VIDEO_ClearFrameBuffer(vmode, xfb[0], COLOR_BLACK);
+  VIDEO_ClearFrameBuffer(vmode, xfb[1], COLOR_BLACK);
   VIDEO_Flush();
   VIDEO_WaitVSync();
-  VIDEO_WaitVSync();
   ogc_video__reset();
   odd_frame = 1;
 

source/ngc/ogc_audio.c

@@ -35,6 +35,9 @@ u8 soundbuffer[2][3840] ATTRIBUTE_ALIGN(32);
 /* Current work soundbuffer */
 int mixbuffer;
 
+/* Status of Audio playback */
+static int AudioStarted = 0;
+
 /* Current DMA length (required to be a factor of 32-bytes)
    length is calculated regarding current emulation timings:
     PAL timings : 50 frames/sec, 48000 samples/sec = 960 samples per frame = 3840 bytes (16 bits stereo samples)
@@ -97,10 +100,10 @@ void ogc_audio__update(void)
 void ogc_audio__start(void)
 {
   dma_len = vdp_pal ? 3840 : 3200;
-  memset(soundbuffer[0], 0, dma_len);
   AUDIO_InitDMA((u32) soundbuffer[0], dma_len);
   DCFlushRange(soundbuffer[0], dma_len);
   AUDIO_StartDMA();
+  AudioStarted = 1;
   mixbuffer = 1;
 }
 
@@ -113,5 +116,10 @@ void ogc_audio__start(void)
  ***/
 void ogc_audio__stop(void)
 {
+  if (AudioStarted)
+  {
     AUDIO_StopDMA ();
+    AudioStarted = 0;
+    memset(soundbuffer, 0, 2 * 3840);
+  }
 }

source/ngc/ogc_video.c

@@ -676,8 +676,8 @@ void ogc_video__init(void)
     ARAMPut ((char *) 0x80700000 + 0x20, (char *) 0x8000, genromsize);
   }
 
-  /* Get the current video mode then :
-      - set menu video mode (480p, 480i or 576i)
+  /* Get the current VIDEO mode then :
+      - set menu VIDEO mode (480p, 480i or 576i)
       - set emulator rendering TV modes (PAL/MPAL/NTSC/EURGB60)
    */
   vmode = VIDEO_GetPreferredMode(NULL);
@@ -729,7 +729,7 @@ void ogc_video__init(void)
   }
 #endif
 
-  /* Configure video mode */
+  /* Configure VIDEO mode */
   VIDEO_Configure (vmode);
 
   /* Configure the framebuffers (double-buffering) */
@@ -746,13 +746,14 @@ void ogc_video__init(void)
   /* Set the framebuffer to be displayed at next VBlank */
   VIDEO_SetNextFramebuffer (xfb[0]);
 
+  /* Set Vertical Interrupt callbacks for VIDEO synchronization */
   VIDEO_SetPreRetraceCallback(xfb_switch);
   VIDEO_SetPostRetraceCallback(xfb_copy);
 
   /* Enable Video Interface */
   VIDEO_SetBlack (FALSE);
 
-  /* Update video settings for next VBlank */
+  /* Update VIDEO settings for next VBlank */
   VIDEO_Flush ();
 
   /* Wait for VBlank */

source/system.c

@@ -28,18 +28,12 @@
 /* Global variables */
 t_bitmap bitmap;
 t_snd snd;
-uint8  vdp_rate;
-uint16 lines_per_frame;
-uint32 aim_m68k;
 uint32 count_m68k;
 uint32 line_m68k;
 uint32 hint_m68k;
-uint32 aim_z80;
 uint32 count_z80;
 uint32 line_z80;
 int32 current_z80;
-uint8 odd_frame;
-uint8 interlaced;
 uint8 system_hw;
 
 static inline void audio_update (void);
@@ -49,10 +43,6 @@ static inline void audio_update (void);
  ****************************************************************/
 void system_init (void)
 {
-  /* PAL/NTSC timings */
-  vdp_rate        = vdp_pal ? 50 : 60;
-  lines_per_frame = vdp_pal ? 313 : 262;
-
   gen_init ();
   vdp_init ();
   render_init ();
@@ -60,31 +50,21 @@ void system_init (void)
 }
 
 /****************************************************************
- * Virtual Genesis Restart
+ * Virtual Genesis Hard Reset
  ****************************************************************/
 void system_reset (void)
 {
-  aim_m68k    = 0;
-  count_m68k  = 0;
-  line_m68k   = 0;
-  aim_z80     = 0;
-  count_z80   = 0;
-  line_z80    = 0;
-  current_z80 = 0;
-  odd_frame   = 0;
-  interlaced  = 0;
-
-  /* Cart Hardware reset */
+  /* Cartridge Hardware */
   cart_hw_reset();
 
-  /* Hard reset */
+  /* Genesis Hardware */
   gen_reset (1); 
   vdp_reset ();
   render_reset ();
   io_reset();
   SN76489_Reset(0);
 
-  /* Sound buffers reset */
+  /* Sound Buffers */
   memset (snd.psg.buffer, 0, SND_SIZE);
   memset (snd.fm.buffer[0], 0, SND_SIZE*2);
   memset (snd.fm.buffer[1], 0, SND_SIZE*2);
@@ -111,10 +91,11 @@ int system_frame (int do_skip)
     return 0;
   }
 
+  int aim_m68k    = 0;
+  int aim_z80     = 0;
+
   /* reset cycles counts */
   count_m68k      = 0;
-  aim_m68k        = 0;
-  aim_z80         = 0;
   count_z80       = 0;
   fifo_write_cnt  = 0;
   fifo_lastwrite  = 0;

source/system.h

@@ -79,18 +79,12 @@ typedef struct
 /* Global variables */
 extern t_bitmap bitmap;
 extern t_snd snd;
-extern uint16 lines_per_frame;
-extern uint8 vdp_rate;
-extern uint32 aim_m68k;
 extern uint32 count_m68k;
 extern uint32 line_m68k;
 extern uint32 hint_m68k;
-extern uint32 aim_z80;
 extern uint32 count_z80;
 extern uint32 line_z80;
 extern int32 current_z80;
-extern uint8 interlaced;
-extern uint8 odd_frame;
 extern uint8 system_hw;
 
 /* Function prototypes */

source/vdp.c

@@ -69,13 +69,16 @@ uint16 playfield_row_mask;        /* Horizontal scroll mask */
 uint32 y_mask;                    /* Name table Y-index bits mask */
 uint16 hc_latch;                  /* latched HCounter (INT2) */
 uint16 v_counter;                 /* VDP scanline counter */
-uint8 im2_flag;                   /* 1= Interlace mode 2 is being used */
 uint32 dma_length;                /* Current DMA remaining bytes */
 int32 fifo_write_cnt;             /* VDP writes fifo count */
 uint32 fifo_lastwrite;            /* last VDP write cycle */
 uint8 fifo_latency;               /* VDP write cycles latency */
-uint8 vdp_pal  = 0;               /* 1: PAL , 0: NTSC (default) */
-
+uint8 odd_frame;                  /* 1: odd field , 0: even field */
+uint8 interlaced;                 /* 1: Interlace mode 1 or 2 */
+uint8 im2_flag;                   /* 1= Interlace mode 2 is being used */
+uint8 vdp_pal;                    /* 0: NTSC, 1: PAL */
+uint8 vdp_rate;                   /* NTSC: 60hz, PAL: 50hz */
+uint16 lines_per_frame;           /* NTSC: 262 lines, PAL: 313 lines */
 
 /* Tables that define the playfield layout */
 static const uint8 shift_table[] = { 6, 7, 0, 8 };
@@ -133,9 +136,8 @@ static inline void data_write(unsigned int data);
 /*--------------------------------------------------------------------------*/
 void vdp_init(void)
 {
+  /* DMA timings */
   int i;
-
-  /* reinitialize DMA timings table */
   for (i=0; i<4; i++)
   {
     vdp_timings[0][i] = ((double)m68cycles_per_line) / ((double) dma_rates[i]);
@@ -143,6 +145,10 @@ void vdp_init(void)
     vdp_timings[2][i] = ((double)m68cycles_per_line) / ((double) dma_rates[i +  8]);
     vdp_timings[3][i] = ((double)m68cycles_per_line) / ((double) dma_rates[i + 12]);
   }
+
+  /* PAL/NTSC timings */
+  vdp_rate        = vdp_pal ? 50 : 60;
+  lines_per_frame = vdp_pal ? 313 : 262;
 }
 
 void vdp_reset(void)
@@ -223,6 +229,10 @@ void vdp_reset(void)
     window_clip(1,0);
   }
 
+  /* non-interlaced display */
+  odd_frame   = 0;
+  interlaced  = 0;
+
   /* default latency */
   fifo_latency = 27;
 }
@@ -281,7 +291,7 @@ void dma_update()
   index += (reg[12] & 1);               /* 32 or 40 Horizontal Cells    */
 
   /* calculate transfer quantity for the remaining 68k cycles */
-  left_cycles = aim_m68k - count_m68k;
+  left_cycles = line_m68k + m68cycles_per_line - count_m68k;
   if (left_cycles < 0) left_cycles = 0;
   dma_bytes = (uint32)(((double)left_cycles / vdp_timings[dma_type][index]) + 0.5);
 
@@ -906,7 +916,6 @@ void vdp_test_w(unsigned int value)
 
 int vdp_int_ack_callback(int int_level)
 {
-
   /* VINT triggered ? */
   if (irq_status&0x20)
   {

source/vdp.h

@@ -57,12 +57,16 @@ extern uint16 playfield_row_mask;
 extern uint32 y_mask;
 extern uint16 hc_latch;
 extern uint16 v_counter;
-extern uint8 im2_flag;
 extern uint32 dma_length;
 extern int32 fifo_write_cnt;
 extern uint32 fifo_lastwrite;
 extern uint8 fifo_latency;
+extern uint8 im2_flag;
+extern uint8 interlaced;
+extern uint8 odd_frame;
 extern uint8 vdp_pal;
+extern uint8 vdp_rate;
+extern uint16 lines_per_frame;
 
 extern uint8 *vctab;
 extern uint8 *hctab;