X-Git-Url: https://notaz.gp2x.de/cgi-bin/gitweb.cgi?p=picodrive.git;a=blobdiff_plain;f=pico%2Fcarthw%2Fcarthw.c;h=a8b4333f434ac9644fff1ce094b488035e945392;hp=aba900ed319ba63301d0d48ab9a7183a9cfac2d3;hb=f50806540979413d06aedc47a195e3fa4ba8bde6;hpb=cff531af94bd9c9c89ae162e80f48ddc26a4e504

diff --git a/pico/carthw/carthw.c b/pico/carthw/carthw.c
index aba900e..a8b4333 100644
--- a/pico/carthw/carthw.c
+++ b/pico/carthw/carthw.c
@@ -1,6 +1,6 @@
 /*
  * Support for a few cart mappers and some protection.
- * (C) notaz, 2008,2009,2010
+ * (C) notaz, 2008-2011
  *
  * This work is licensed under the terms of MAME license.
  * See COPYING file in the top-level directory.
@@ -8,10 +8,21 @@
 
 #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;
+}
+
 /* The SSFII mapper */
-unsigned char ssf2_banks[8];
+static unsigned char ssf2_banks[8];
 
 static carthw_state_chunk carthw_ssf2_state[] =
 {
@@ -35,10 +46,8 @@ static void carthw_ssf2_write8(u32 a, u32 d)
 	ssf2_banks[a >> 1] = d;
 	base = d << 19;
 	target = a << 18;
-	if (base + 0x80000 > Pico.romsize) {
-		elprintf(EL_ANOMALY|EL_STATUS, "ssf2: missing bank @ %06x", base);
+	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);
@@ -261,25 +270,219 @@ 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:
+      SRam.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;
+  pier_dump_prot = 3;
+  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;
+  }
+
+  // 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);
+  SRam.flags = 0;
+  SRam.size = 0x10000;
+  SRam.data = calloc(1, SRam.size);
+  if (!SRam.data)
+    SRam.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;
+  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;
+  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;
 
-	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;
+  return NULL;
 }
 
 static u32 PicoRead8_sprot(u32 a)
@@ -499,3 +702,4 @@ void carthw_prot_lk3_startup(void)
   PicoCartMemSetup = carthw_prot_lk3_mem_setup;
 }
 
+// vim:ts=2:sw=2:expandtab