core, add some superfighter mappers

pico/cart.c

@@ -1133,6 +1133,10 @@ static void parse_carthw(const char *carthw_cfg, int *fill_sram,
         carthw_radica_startup();
       else if (strcmp(p, "piersolar_mapper") == 0)
         carthw_pier_startup();
+      else if (strcmp(p, "sf001_mapper") == 0)
+        carthw_sf001_startup();
+      else if (strcmp(p, "sf002_mapper") == 0)
+        carthw_sf002_startup();
       else if (strcmp(p, "prot_lk3") == 0)
         carthw_prot_lk3_startup();
       else {

pico/carthw.cfg

@@ -16,6 +16,8 @@
 #  realtec_mapper
 #  radica_mapper    - similar to x_in_1_mapper
 #  piersolar_mapper - used in Pier Solar
+#  sf001_mapper
+#  sf002_mapper
 #
 # save storage memory range (inclusive, overrides ROM header):
 #  sram_range = <start, end>
@@ -90,6 +92,17 @@ check_str = 0x150, "PIER"
 check_str = 0x610, "Respect"
 hw = piersolar_mapper
 
+# Beggar Prince, unusual SRAM location
+[Beggar Prince]
+check_str = 0x150, "BEGGAR PRINCE"
+hw = sf001_mapper
+sram_range = 0x400000,0x40ffff
+prop = filled_sram
+
+[Legend of Wukong]
+check_str = 0x150, "LEGEND OF WUKONG"
+hw = sf002_mapper
+
 # detect *_in_1 based on first game and if it's larger than it should be,
 # as some dumps look like to be incomplete.
 # This will also pick overdumps, but those should still work with the mapper applied.

pico/carthw/carthw.c

@@ -483,6 +483,139 @@ void carthw_pier_startup(void)
   carthw_chunks     = carthw_pier_state;
 }
 
+/* superfighter mappers */
+unsigned int carthw_sf00x_reg;
+
+static carthw_state_chunk carthw_sf00x_state[] =
+{
+	{ CHUNK_CARTHW, sizeof(carthw_sf00x_reg), &carthw_sf00x_reg },
+	{ 0,            0,                         NULL }
+};
+
+// hack to remap SRAM from 0x400000 to 0x3c0000 (there are 2 versions of sf001)
+u32 carthw_sf001_read8_sram(u32 a)
+{
+  return m68k_read8((a & 0xffff) + 0x400000);
+}
+
+u32 carthw_sf001_read16_sram(u32 a)
+{
+  return m68k_read16((a & 0xffff) + 0x400000);
+}
+
+void carthw_sf001_write8_sram(u32 a, u32 d)
+{
+  m68k_write8((a & 0xffff) + 0x400000, d);
+}
+
+void carthw_sf001_write16_sram(u32 a, u32 d)
+{
+  m68k_write16((a & 0xffff) + 0x400000, d);
+}
+
+void carthw_sf001_write8(u32 a, u32 d)
+{
+  if ((a & 0xf00) != 0x0e00)
+    return;
+
+  if (d & 0x80) {
+    // bank 0xe at addr 0x000000
+    cpu68k_map_set(m68k_read8_map,  0x000000, 0x040000-1, Pico.rom+0x380000, 0);
+    cpu68k_map_set(m68k_read16_map, 0x000000, 0x040000-1, Pico.rom+0x380000, 0);
+    // SRAM at 0x3c0000; hack to map SRAM from old to new location
+    cpu68k_map_set(m68k_read8_map,  0x3c0000, 0x400000-1, carthw_sf001_read8_sram, 1);
+    cpu68k_map_set(m68k_read16_map, 0x3c0000, 0x400000-1, carthw_sf001_read16_sram, 1);
+    cpu68k_map_set(m68k_write8_map, 0x3c0000, 0x400000-1, carthw_sf001_write8_sram, 1);
+    cpu68k_map_set(m68k_write16_map,0x3c0000, 0x400000-1, carthw_sf001_write16_sram, 1);
+  } else {
+    // bank 0x0 at addr 0x000000
+    cpu68k_map_set(m68k_read8_map,  0x000000, 0x040000-1, Pico.rom, 0);
+    cpu68k_map_set(m68k_read16_map, 0x000000, 0x040000-1, Pico.rom, 0);
+    // SRAM off, bank 0xf at addr 0x3c0000
+    cpu68k_map_set(m68k_read8_map,  0x3c0000, 0x400000-1, Pico.rom+0x3c0000, 0);
+    cpu68k_map_set(m68k_read16_map, 0x3c0000, 0x400000-1, Pico.rom+0x3c0000, 0);
+    cpu68k_map_set(m68k_write8_map, 0x3c0000, 0x400000-1, Pico.rom+0x3c0000, 0);
+    cpu68k_map_set(m68k_write16_map,0x3c0000, 0x400000-1, Pico.rom+0x3c0000, 0);
+  }
+  carthw_sf00x_reg = d;
+}
+
+void carthw_sf001_write16(u32 a, u32 d)
+{
+  carthw_sf001_write8(a + 1, d);
+}
+
+static void carthw_sf001_mem_setup(void)
+{
+  cpu68k_map_set(m68k_write8_map,  0x000000, 0x00ffff, carthw_sf001_write8, 1);
+  cpu68k_map_set(m68k_write16_map, 0x000000, 0x00ffff, carthw_sf001_write16, 1);
+}
+
+static void carthw_sf001_reset(void)
+{
+  carthw_sf001_write8(0x0e01, 0);
+}
+
+static void carthw_sf001_statef(void)
+{
+  carthw_sf001_write8(0x0e01, carthw_sf00x_reg);
+}
+
+void carthw_sf001_startup(void)
+{
+  PicoCartMemSetup  = carthw_sf001_mem_setup;
+  PicoResetHook     = carthw_sf001_reset;
+  PicoLoadStateHook = carthw_sf001_statef;
+  carthw_chunks     = carthw_sf00x_state;
+}
+
+
+void carthw_sf002_write8(u32 a, u32 d)
+{
+  if ((a & 0xf00) != 0x0e00)
+    return;
+
+  if (d & 0x80) {
+    // bank 0x00-0x0e on addr 0x20000
+    cpu68k_map_set(m68k_read8_map,  0x200000, 0x3c0000-1, Pico.rom, 0);
+    cpu68k_map_set(m68k_read16_map, 0x200000, 0x3c0000-1, Pico.rom, 0);
+  } else {
+    // bank 0x10-0x1e on addr 0x20000
+    cpu68k_map_set(m68k_read8_map,  0x200000, 0x3c0000-1, Pico.rom+0x200000, 0);
+    cpu68k_map_set(m68k_read16_map, 0x200000, 0x3c0000-1, Pico.rom+0x200000, 0);
+  }
+  carthw_sf00x_reg = d;
+}
+
+void carthw_sf002_write16(u32 a, u32 d)
+{
+  carthw_sf002_write8(a + 1, d);
+}
+
+static void carthw_sf002_mem_setup(void)
+{
+  cpu68k_map_set(m68k_write8_map,  0x000000, 0x00ffff, carthw_sf002_write8, 1);
+  cpu68k_map_set(m68k_write16_map, 0x000000, 0x00ffff, carthw_sf002_write16, 1);
+}
+
+static void carthw_sf002_reset(void)
+{
+  carthw_sf002_write8(0x0e01, 0);
+}
+
+static void carthw_sf002_statef(void)
+{
+  carthw_sf002_write8(0x0e01, carthw_sf00x_reg);
+}
+
+void carthw_sf002_startup(void)
+{
+  PicoCartMemSetup  = carthw_sf002_mem_setup;
+  PicoResetHook     = carthw_sf002_reset;
+  PicoLoadStateHook = carthw_sf002_statef;
+  carthw_chunks     = carthw_sf00x_state;
+}
+
 /* Simple unlicensed ROM protection emulation */
 static struct {
   u32 addr;

pico/carthw_cfg.c

@@ -42,6 +42,13 @@ static const char builtin_carthw_cfg[] =
   "check_str=0x610,\"Respect\"\n"
   "hw=piersolar_mapper\n"
   "[]\n"
+  "check_str=0x150,\"BEGGAR PRINCE\"\n"
+  "hw=sf001_mapper\n"
+  "sram_range=0x400000,0x40ffff\n"
+  "[]\n"
+  "check_str=0x150,\"LEGEND OF WUKONG\"\n"
+  "hw=sf002_mapper\n"
+  "[]\n"
   "check_str=0x120,\"FLICKY\"\n"
   "check_size_gt=0x020000\n"
   "hw=x_in_1_mapper\n"

pico/memory.c

@@ -777,7 +777,7 @@ PICO_INTERNAL void PicoMemSetup(void)
 
   // Common case of on-cart (save) RAM, usually at 0x200000-...
   if ((Pico.sv.flags & SRF_ENABLED) && Pico.sv.data != NULL) {
-    sstart = Pico.sv.start;
+    sstart = Pico.sv.start & ~mask;
     rs = Pico.sv.end - sstart;
     rs = (rs + mask) & ~mask;
     if (sstart + rs >= 0x1000000)