updated EEPROM code, gmv fixed

[picodrive.git] / Pico / Cart.c

diff --git a/Pico/Cart.c b/Pico/Cart.c
index 1cf8dec..cf33580 100644 (file)
--- a/Pico/Cart.c
+++ b/Pico/Cart.c
@@ -310,10 +310,18 @@ int PicoCartInsert(unsigned char *rom,unsigned int romsize)
   if(rom != NULL)\r
     *(unsigned long *)(rom+romsize) = 0xFFFE4EFA; // 4EFA FFFE byteswapped\r
 \r
-  SRam.resize=1;\r
   Pico.rom=rom;\r
   Pico.romsize=romsize;\r
 \r
+  // setup correct memory map for loaded ROM\r
+  if (PicoMCD & 1)\r
+       PicoMemSetupCD();\r
+  else PicoMemSetup();\r
+  PicoMemReset();\r
+\r
+  if (!(PicoMCD & 1))\r
+    PicoCartDetect();\r
+\r
   return PicoReset(1);\r
 }\r
 \r
@@ -323,3 +331,115 @@ int PicoUnloadCart(unsigned char* romdata)
   return 0;\r
 }\r
 \r
+static int name_cmp(const char *name)\r
+{\r
+  int i, len = strlen(name);\r
+  const char *name_rom = (const char *)Pico.rom+0x150;\r
+  for (i = 0; i < len; i++)\r
+    if (name[i] != name_rom[i^1])\r
+      return 1;\r
+  return 0;\r
+}\r
+\r
+/* various cart-specific things, which can't be handled by generic code */\r
+void PicoCartDetect(void)\r
+{\r
+  int sram_size = 0, csum;\r
+  if(SRam.data) free(SRam.data); SRam.data=0;\r
+  Pico.m.sram_reg = 0;\r
+\r
+  csum = PicoRead32(0x18c) & 0xffff;\r
+\r
+  if (Pico.rom[0x1B1] == 'R' && Pico.rom[0x1B0] == 'A')\r
+  {\r
+    if (Pico.rom[0x1B2] & 0x40)\r
+    {\r
+      // EEPROM\r
+      SRam.start = PicoRead32(0x1B4) & ~1; // zero address is used for clock by some games\r
+      SRam.end   = PicoRead32(0x1B8);\r
+      sram_size  = 0x2000;\r
+      Pico.m.sram_reg |= 4;\r
+    } else {\r
+      // normal SRAM\r
+      SRam.start = PicoRead32(0x1B4) & 0xFFFF00;\r
+      SRam.end   = PicoRead32(0x1B8) | 1;\r
+      sram_size  = SRam.end - SRam.start + 1;\r
+    }\r
+    Pico.m.sram_reg |= 0x10; // SRAM was detected\r
+  }\r
+  if (sram_size <= 0)\r
+  {\r
+    // some games may have bad headers, like S&K and Sonic3\r
+    // note: majority games use 0x200000 as starting address, but there are some which\r
+    // use something else (0x300000 by HardBall '95). Luckily they have good headers.\r
+    SRam.start = 0x200000;\r
+    SRam.end   = 0x203FFF;\r
+    sram_size  = 0x004000;\r
+  }\r
+\r
+  if (sram_size)\r
+  {\r
+    SRam.data = (unsigned char *) calloc(sram_size, 1);\r
+    if(!SRam.data) return;\r
+  }\r
+  SRam.changed = 0;\r
+\r
+  // set EEPROM defaults, in case it gets detected\r
+  SRam.eeprom_type   = 0; // 7bit (24C01)\r
+  SRam.eeprom_abits  = 3; // eeprom access must be odd addr for: bit0 ~ cl, bit1 ~ in\r
+  SRam.eeprom_bit_cl = 1;\r
+  SRam.eeprom_bit_in = 0;\r
+  SRam.eeprom_bit_out= 0;\r
+\r
+  // some known EEPROM data (thanks to EkeEke)\r
+  if (name_cmp("COLLEGE SLAM") == 0 ||\r
+      name_cmp("FRANK THOMAS BIGHURT BASEBAL") == 0)\r
+  {\r
+    SRam.eeprom_type = 3;\r
+    SRam.eeprom_abits = 2;\r
+    SRam.eeprom_bit_cl = 0;\r
+  }\r
+  else if (name_cmp("NBA JAM TOURNAMENT EDITION") == 0 ||\r
+           name_cmp("NFL QUARTERBACK CLUB") == 0)\r
+  {\r
+    SRam.eeprom_type = 2;\r
+    SRam.eeprom_abits = 2;\r
+    SRam.eeprom_bit_cl = 0;\r
+  }\r
+  else if (name_cmp("NBA JAM") == 0)\r
+  {\r
+    SRam.eeprom_type = 2;\r
+    SRam.eeprom_bit_out = 1;\r
+    SRam.eeprom_abits = 0;\r
+  }\r
+  else if (name_cmp("NHLPA HOCKEY '93") == 0 ||\r
+           name_cmp("NHLPA Hockey '93") == 0 ||\r
+           name_cmp("RINGS OF POWER") == 0)\r
+  {\r
+    SRam.start = SRam.end = 0x200000;\r
+    Pico.m.sram_reg = 0x14;\r
+    SRam.eeprom_abits = 0;\r
+    SRam.eeprom_bit_cl = 6;\r
+    SRam.eeprom_bit_in = 7;\r
+    SRam.eeprom_bit_out= 7;\r
+  }\r
+  else if ( name_cmp("MICRO MACHINES II") == 0 ||\r
+           (name_cmp("        ") == 0 && // Micro Machines {Turbo Tournament '96, Military - It's a Blast!}\r
+           (csum == 0x165e || csum == 0x168b || csum == 0xCEE0 || csum == 0x2C41)))\r
+  {\r
+    SRam.start = 0x300000;\r
+    SRam.end   = 0x380001;\r
+    Pico.m.sram_reg = 0x14;\r
+    SRam.eeprom_type = 2;\r
+    SRam.eeprom_abits = 0;\r
+    SRam.eeprom_bit_cl = 1;\r
+    SRam.eeprom_bit_in = 0;\r
+    SRam.eeprom_bit_out= 7;\r
+  }\r
+\r
+  // Some games malfunction if SRAM is not filled with 0xff\r
+  if (name_cmp("DINO DINI'S SOCCER") == 0 ||\r
+      name_cmp("MICRO MACHINES II") == 0)\r
+    memset(SRam.data, 0xff, sram_size);\r
+}\r
+\r