X-Git-Url: https://notaz.gp2x.de/cgi-bin/gitweb.cgi?a=blobdiff_plain;f=pico%2Fcarthw%2Fcarthw.c;h=41dc6bd8e8438803eefed4fdccaa94cfb0149fc5;hb=8b9dbcde387f567a154e15ca14a0c6e5b3efa3ef;hp=6424f1eb3280c389f5589d15b0562f253fb1a05d;hpb=45f2f245f51ef0c0d37df3c998595c132bfcaffa;p=picodrive.git

diff --git a/pico/carthw/carthw.c b/pico/carthw/carthw.c
index 6424f1e..41dc6bd 100644
--- a/pico/carthw/carthw.c
+++ b/pico/carthw/carthw.c
@@ -1,13 +1,97 @@
 /*
- * Support for a few cart mappers.
- *
- * (c) Copyright 2008-2009, Grazvydas "notaz" Ignotas
- * Free for non-commercial use.
+ * Support for a few cart mappers and some protection.
+ * (C) notaz, 2008-2011
  *
+ * This work is licensed under the terms of MAME license.
+ * See COPYING file in the top-level directory.
  */
 
 #include "../pico_int.h"
 #include "../memory.h"
+#include "eeprom_spi.h"
+
+
+static int have_bank(u32 base)
+{
+  // the loader allocs in 512K quantities
+  if (base >= Pico.romsize) {
+    elprintf(EL_ANOMALY|EL_STATUS, "carthw: missing bank @ %06x", base);
+    return 0;
+  }
+  return 1;
+}
+
+/* standard/ssf2 mapper */
+int carthw_ssf2_active;
+unsigned char carthw_ssf2_banks[8];
+
+static carthw_state_chunk carthw_ssf2_state[] =
+{
+  { CHUNK_CARTHW, sizeof(carthw_ssf2_banks), &carthw_ssf2_banks },
+  { 0,            0,                         NULL }
+};
+
+static void carthw_ssf2_write8(u32 a, u32 d)
+{
+  u32 target, base;
+
+  if ((a & 0xfffff0) != 0xa130f0) {
+    PicoWrite8_io(a, d);
+    return;
+  }
+
+  a &= 0x0e;
+  if (a == 0)
+    return;
+  if (carthw_ssf2_banks[a >> 1] == d)
+    return;
+
+  base = d << 19;
+  target = a << 18;
+  if (!have_bank(base))
+    return;
+  carthw_ssf2_banks[a >> 1] = d;
+
+  cpu68k_map_set(m68k_read8_map,  target, target + 0x80000 - 1, Pico.rom + base, 0);
+  cpu68k_map_set(m68k_read16_map, target, target + 0x80000 - 1, Pico.rom + base, 0);
+  if (PicoIn.AHW & PAHW_32X)
+    p32x_update_banks();
+}
+
+static void carthw_ssf2_mem_setup(void)
+{
+  cpu68k_map_set(m68k_write8_map, 0xa10000, 0xa1ffff, carthw_ssf2_write8, 1);
+}
+
+static void carthw_ssf2_statef(void)
+{
+  int i;
+  for (i = 1; i < 8; i++)
+    carthw_ssf2_write8(0xa130f0 | (i << 1), carthw_ssf2_banks[i]);
+}
+
+static void carthw_ssf2_unload(void)
+{
+  memset(carthw_ssf2_banks, 0, sizeof(carthw_ssf2_banks));
+  carthw_ssf2_active = 0;
+}
+
+void carthw_ssf2_startup(void)
+{
+  int i;
+
+  elprintf(EL_STATUS, "SSF2 mapper startup");
+
+  // default map
+  for (i = 0; i < 8; i++)
+    carthw_ssf2_banks[i] = i;
+
+  PicoCartMemSetup   = carthw_ssf2_mem_setup;
+  PicoLoadStateHook  = carthw_ssf2_statef;
+  PicoCartUnloadHook = carthw_ssf2_unload;
+  carthw_chunks      = carthw_ssf2_state;
+  carthw_ssf2_active = 1;
+}
 
 
 /* Common *-in-1 pirate mapper.
@@ -141,20 +225,17 @@ static void carthw_realtec_reset(void)
 
 void carthw_realtec_startup(void)
 {
-	void *tmp;
 	int i;
 
 	elprintf(EL_STATUS, "Realtec mapper startup");
 
 	// allocate additional bank for boot code
 	// (we know those ROMs have aligned size)
-	tmp = realloc(Pico.rom, Pico.romsize + M68K_BANK_SIZE);
-	if (tmp == NULL)
-	{
+	i = PicoCartResize(Pico.romsize + M68K_BANK_SIZE);
+	if (i != 0) {
 		elprintf(EL_STATUS, "OOM");
 		return;
 	}
-	Pico.rom = tmp;
 
 	// create bank for boot code
 	for (i = 0; i < M68K_BANK_SIZE; i += 0x2000)
@@ -202,3 +283,437 @@ void carthw_radica_startup(void)
 	carthw_chunks     = carthw_Xin1_state;
 }
 
+
+/* Pier Solar. Based on my own research */
+static unsigned char pier_regs[8];
+static unsigned char pier_dump_prot;
+
+static carthw_state_chunk carthw_pier_state[] =
+{
+  { CHUNK_CARTHW,     sizeof(pier_regs),      pier_regs },
+  { CHUNK_CARTHW + 1, sizeof(pier_dump_prot), &pier_dump_prot },
+  { CHUNK_CARTHW + 2, 0,                      NULL }, // filled later
+  { 0,                0,                      NULL }
+};
+
+static void carthw_pier_write8(u32 a, u32 d)
+{
+  u32 a8, target, base;
+
+  if ((a & 0xffff00) != 0xa13000) {
+    PicoWrite8_io(a, d);
+    return;
+  }
+
+  a8 = a & 0x0f;
+  pier_regs[a8 / 2] = d;
+
+      elprintf(EL_UIO, "pier w8  [%06x] %02x @%06x", a, d & 0xffff, SekPc);
+  switch (a8) {
+    case 0x01:
+      break;
+    case 0x03:
+      if (!(pier_regs[0] & 2))
+        goto unmapped;
+      target = 0x280000;
+      base = d << 19;
+      goto do_map;
+    case 0x05:
+      if (!(pier_regs[0] & 2))
+        goto unmapped;
+      target = 0x300000;
+      base = d << 19;
+      goto do_map;
+    case 0x07:
+      if (!(pier_regs[0] & 2))
+        goto unmapped;
+      target = 0x380000;
+      base = d << 19;
+      goto do_map;
+    case 0x09:
+      Pico.sv.changed = 1;
+      eeprom_spi_write(d);
+      break;
+    case 0x0b:
+      // eeprom read
+    default:
+    unmapped:
+      //elprintf(EL_UIO, "pier w8  [%06x] %02x @%06x", a, d & 0xffff, SekPc);
+      elprintf(EL_STATUS, "-- unmapped w8 [%06x] %02x @%06x", a, d & 0xffff, SekPc);
+      break;
+  }
+  return;
+
+do_map:
+  if (!have_bank(base))
+    return;
+
+  cpu68k_map_set(m68k_read8_map,  target, target + 0x80000 - 1, Pico.rom + base, 0);
+  cpu68k_map_set(m68k_read16_map, target, target + 0x80000 - 1, Pico.rom + base, 0);
+}
+
+static void carthw_pier_write16(u32 a, u32 d)
+{
+  if ((a & 0xffff00) != 0xa13000) {
+    PicoWrite16_io(a, d);
+    return;
+  }
+
+  elprintf(EL_UIO, "pier w16 [%06x] %04x @%06x", a, d & 0xffff, SekPc);
+  carthw_pier_write8(a + 1, d);
+}
+
+static u32 carthw_pier_read8(u32 a)
+{
+  if ((a & 0xffff00) != 0xa13000)
+    return PicoRead8_io(a);
+
+  if (a == 0xa1300b)
+    return eeprom_spi_read(a);
+
+  elprintf(EL_UIO, "pier r8  [%06x] @%06x", a, SekPc);
+  return 0;
+}
+
+static void carthw_pier_statef(void);
+
+static u32 carthw_pier_prot_read8(u32 a)
+{
+  /* it takes more than just these reads here to disable ROM protection,
+   * but for game emulation purposes this is enough. */
+  if (pier_dump_prot > 0)
+    pier_dump_prot--;
+  if (pier_dump_prot == 0) {
+    carthw_pier_statef();
+    elprintf(EL_STATUS, "prot off on r8 @%06x", SekPc);
+  }
+  elprintf(EL_UIO, "pier r8  [%06x] @%06x", a, SekPc);
+
+  return Pico.rom[(a & 0x7fff) ^ 1];
+}
+
+static void carthw_pier_mem_setup(void)
+{
+  cpu68k_map_set(m68k_write8_map,  0xa10000, 0xa1ffff, carthw_pier_write8, 1);
+  cpu68k_map_set(m68k_write16_map, 0xa10000, 0xa1ffff, carthw_pier_write16, 1);
+  cpu68k_map_set(m68k_read8_map,   0xa10000, 0xa1ffff, carthw_pier_read8, 1);
+}
+
+static void carthw_pier_prot_mem_setup(int prot_enable)
+{
+  if (prot_enable) {
+    /* the dump protection.. */
+    int a;
+    for (a = 0x000000; a < 0x400000; a += M68K_BANK_SIZE) {
+      cpu68k_map_set(m68k_read8_map,  a, a + 0xffff, Pico.rom + Pico.romsize, 0);
+      cpu68k_map_set(m68k_read16_map, a, a + 0xffff, Pico.rom + Pico.romsize, 0);
+    }
+    cpu68k_map_set(m68k_read8_map, M68K_BANK_SIZE, M68K_BANK_SIZE * 2 - 1,
+      carthw_pier_prot_read8, 1);
+  }
+  else {
+    cpu68k_map_set(m68k_read8_map,  0, 0x27ffff, Pico.rom, 0);
+    cpu68k_map_set(m68k_read16_map, 0, 0x27ffff, Pico.rom, 0);
+  }
+}
+
+static void carthw_pier_statef(void)
+{
+  carthw_pier_prot_mem_setup(pier_dump_prot);
+
+  if (!pier_dump_prot) {
+    /* setup all banks */
+    u32 r0 = pier_regs[0];
+    carthw_pier_write8(0xa13001, 3);
+    carthw_pier_write8(0xa13003, pier_regs[1]);
+    carthw_pier_write8(0xa13005, pier_regs[2]);
+    carthw_pier_write8(0xa13007, pier_regs[3]);
+    carthw_pier_write8(0xa13001, r0);
+  }
+}
+
+static void carthw_pier_reset(void)
+{
+  pier_regs[0] = 1;
+  pier_regs[1] = pier_regs[2] = pier_regs[3] = 0;
+  carthw_pier_statef();
+  eeprom_spi_init(NULL);
+}
+
+void carthw_pier_startup(void)
+{
+  void *eeprom_state;
+  int eeprom_size = 0;
+  int i;
+
+  elprintf(EL_STATUS, "Pier Solar mapper startup");
+
+  // mostly same as for realtec..
+  i = PicoCartResize(Pico.romsize + M68K_BANK_SIZE);
+  if (i != 0) {
+    elprintf(EL_STATUS, "OOM");
+    return;
+  }
+
+  pier_dump_prot = 3;
+
+  // create dump protection bank
+  for (i = 0; i < M68K_BANK_SIZE; i += 0x8000)
+    memcpy(Pico.rom + Pico.romsize + i, Pico.rom, 0x8000);
+
+  // save EEPROM
+  eeprom_state = eeprom_spi_init(&eeprom_size);
+  Pico.sv.flags = 0;
+  Pico.sv.size = 0x10000;
+  Pico.sv.data = calloc(1, Pico.sv.size);
+  if (!Pico.sv.data)
+    Pico.sv.size = 0;
+  carthw_pier_state[2].ptr = eeprom_state;
+  carthw_pier_state[2].size = eeprom_size;
+
+  PicoCartMemSetup  = carthw_pier_mem_setup;
+  PicoResetHook     = carthw_pier_reset;
+  PicoLoadStateHook = carthw_pier_statef;
+  carthw_chunks     = carthw_pier_state;
+}
+
+/* Simple unlicensed ROM protection emulation */
+static struct {
+  u32 addr;
+  u32 mask;
+  u16 val;
+  u16 readonly;
+} *sprot_items;
+static int sprot_item_alloc;
+static int sprot_item_count;
+
+static u16 *carthw_sprot_get_val(u32 a, int rw_only)
+{
+  int i;
+
+  for (i = 0; i < sprot_item_count; i++)
+    if ((a & sprot_items[i].mask) == sprot_items[i].addr)
+      if (!rw_only || !sprot_items[i].readonly)
+        return &sprot_items[i].val;
+
+  return NULL;
+}
+
+static u32 PicoRead8_sprot(u32 a)
+{
+  u16 *val;
+  u32 d;
+
+  if (0xa10000 <= a && a < 0xa12000)
+    return PicoRead8_io(a);
+
+  val = carthw_sprot_get_val(a, 0);
+  if (val != NULL) {
+    d = *val;
+    if (!(a & 1))
+      d >>= 8;
+    elprintf(EL_UIO, "prot r8  [%06x]   %02x @%06x", a, d, SekPc);
+    return d;
+  }
+  else {
+    elprintf(EL_UIO, "prot r8  [%06x] MISS @%06x", a, SekPc);
+    return 0;
+  }
+}
+
+static u32 PicoRead16_sprot(u32 a)
+{
+  u16 *val;
+
+  if (0xa10000 <= a && a < 0xa12000)
+    return PicoRead16_io(a);
+
+  val = carthw_sprot_get_val(a, 0);
+  if (val != NULL) {
+    elprintf(EL_UIO, "prot r16 [%06x] %04x @%06x", a, *val, SekPc);
+    return *val;
+  }
+  else {
+    elprintf(EL_UIO, "prot r16 [%06x] MISS @%06x", a, SekPc);
+    return 0;
+  }
+}
+
+static void PicoWrite8_sprot(u32 a, u32 d)
+{
+  u16 *val;
+
+  if (0xa10000 <= a && a < 0xa12000) {
+    PicoWrite8_io(a, d);
+    return;
+  }
+
+  val = carthw_sprot_get_val(a, 1);
+  if (val != NULL) {
+    if (a & 1)
+      *val = (*val & 0xff00) | (d | 0xff);
+    else
+      *val = (*val & 0x00ff) | (d << 8);
+    elprintf(EL_UIO, "prot w8  [%06x]   %02x @%06x", a, d & 0xff, SekPc);
+  }
+  else
+    elprintf(EL_UIO, "prot w8  [%06x]   %02x MISS @%06x", a, d & 0xff, SekPc);
+}
+
+static void PicoWrite16_sprot(u32 a, u32 d)
+{
+  u16 *val;
+
+  if (0xa10000 <= a && a < 0xa12000) {
+    PicoWrite16_io(a, d);
+    return;
+  }
+
+  val = carthw_sprot_get_val(a, 1);
+  if (val != NULL) {
+    *val = d;
+    elprintf(EL_UIO, "prot w16 [%06x] %04x @%06x", a, d & 0xffff, SekPc);
+  }
+  else
+    elprintf(EL_UIO, "prot w16 [%06x] %04x MISS @%06x", a, d & 0xffff, SekPc);
+}
+
+void carthw_sprot_new_location(unsigned int a, unsigned int mask, unsigned short val, int is_ro)
+{
+  if (sprot_items == NULL) {
+    sprot_items = calloc(8, sizeof(sprot_items[0]));
+    sprot_item_alloc = 8;
+    sprot_item_count = 0;
+  }
+
+  if (sprot_item_count == sprot_item_alloc) {
+    void *tmp;
+    sprot_item_alloc *= 2;
+    tmp = realloc(sprot_items, sprot_item_alloc);
+    if (tmp == NULL) {
+      elprintf(EL_STATUS, "OOM");
+      return;
+    }
+    sprot_items = tmp;
+  }
+
+  sprot_items[sprot_item_count].addr = a;
+  sprot_items[sprot_item_count].mask = mask;
+  sprot_items[sprot_item_count].val = val;
+  sprot_items[sprot_item_count].readonly = is_ro;
+  sprot_item_count++;
+}
+
+static void carthw_sprot_unload(void)
+{
+  free(sprot_items);
+  sprot_items = NULL;
+  sprot_item_count = sprot_item_alloc = 0;
+}
+
+static void carthw_sprot_mem_setup(void)
+{
+  int start;
+
+  // map ROM - 0x7fffff, /TIME areas (which are tipically used)
+  start = (Pico.romsize + M68K_BANK_MASK) & ~M68K_BANK_MASK;
+  cpu68k_map_set(m68k_read8_map,   start, 0x7fffff, PicoRead8_sprot, 1);
+  cpu68k_map_set(m68k_read16_map,  start, 0x7fffff, PicoRead16_sprot, 1);
+  cpu68k_map_set(m68k_write8_map,  start, 0x7fffff, PicoWrite8_sprot, 1);
+  cpu68k_map_set(m68k_write16_map, start, 0x7fffff, PicoWrite16_sprot, 1);
+
+  cpu68k_map_set(m68k_read8_map,   0xa10000, 0xa1ffff, PicoRead8_sprot, 1);
+  cpu68k_map_set(m68k_read16_map,  0xa10000, 0xa1ffff, PicoRead16_sprot, 1);
+  cpu68k_map_set(m68k_write8_map,  0xa10000, 0xa1ffff, PicoWrite8_sprot, 1);
+  cpu68k_map_set(m68k_write16_map, 0xa10000, 0xa1ffff, PicoWrite16_sprot, 1);
+}
+
+void carthw_sprot_startup(void)
+{
+  elprintf(EL_STATUS, "Prot emu startup");
+
+  PicoCartMemSetup   = carthw_sprot_mem_setup;
+  PicoCartUnloadHook = carthw_sprot_unload;
+}
+
+/* Protection emulation for Lion King 3. Credits go to Haze */
+static u8 prot_lk3_cmd, prot_lk3_data;
+
+static u32 PicoRead8_plk3(u32 a)
+{
+  u32 d = 0;
+  switch (prot_lk3_cmd) {
+    case 1: d = prot_lk3_data >> 1; break;
+    case 2: // nibble rotate
+      d = ((prot_lk3_data >> 4) | (prot_lk3_data << 4)) & 0xff;
+      break;
+    case 3: // bit rotate
+      d = prot_lk3_data;
+      d = (d >> 4) | (d << 4);
+      d = ((d & 0xcc) >> 2) | ((d & 0x33) << 2);
+      d = ((d & 0xaa) >> 1) | ((d & 0x55) << 1);
+      break;
+/* Top Fighter 2000 MK VIII (Unl)
+      case 0x98: d = 0x50; break; // prot_lk3_data == a8 here
+      case 0x67: d = 0xde; break; // prot_lk3_data == 7b here (rot!)
+      case 0xb5: d = 0x9f; break; // prot_lk3_data == 4a
+*/
+    default:
+      elprintf(EL_UIO, "unhandled prot cmd %02x @%06x", prot_lk3_cmd, SekPc);
+      break;
+  }
+
+  elprintf(EL_UIO, "prot r8  [%06x]   %02x @%06x", a, d, SekPc);
+  return d;
+}
+
+static void PicoWrite8_plk3p(u32 a, u32 d)
+{
+  elprintf(EL_UIO, "prot w8  [%06x]   %02x @%06x", a, d & 0xff, SekPc);
+  if (a & 2)
+    prot_lk3_cmd = d;
+  else
+    prot_lk3_data = d;
+}
+
+static void PicoWrite8_plk3b(u32 a, u32 d)
+{
+  int addr;
+
+  elprintf(EL_UIO, "prot w8  [%06x]   %02x @%06x", a, d & 0xff, SekPc);
+  addr = d << 15;
+  if (addr + 0x8000 > Pico.romsize) {
+    elprintf(EL_UIO|EL_ANOMALY, "prot_lk3: bank too large: %02x", d);
+    return;
+  }
+  if (addr == 0)
+    memcpy(Pico.rom, Pico.rom + Pico.romsize, 0x8000);
+  else
+    memcpy(Pico.rom, Pico.rom + addr, 0x8000);
+}
+
+static void carthw_prot_lk3_mem_setup(void)
+{
+  cpu68k_map_set(m68k_read8_map,   0x600000, 0x7fffff, PicoRead8_plk3, 1);
+  cpu68k_map_set(m68k_write8_map,  0x600000, 0x6fffff, PicoWrite8_plk3p, 1);
+  cpu68k_map_set(m68k_write8_map,  0x700000, 0x7fffff, PicoWrite8_plk3b, 1);
+}
+
+void carthw_prot_lk3_startup(void)
+{
+  int ret;
+
+  elprintf(EL_STATUS, "lk3 prot emu startup");
+
+  // allocate space for bank0 backup
+  ret = PicoCartResize(Pico.romsize + 0x8000);
+  if (ret != 0) {
+    elprintf(EL_STATUS, "OOM");
+    return;
+  }
+  memcpy(Pico.rom + Pico.romsize, Pico.rom, 0x8000);
+
+  PicoCartMemSetup = carthw_prot_lk3_mem_setup;
+}
+
+// vim:ts=2:sw=2:expandtab