--- /dev/null
+/*
+ * Support for a few cart mappers.
+ *
+ * (c) Copyright 2008, Grazvydas "notaz" Ignotas
+ * Free for non-commercial use.
+ *
+ *
+ * I should better do some pointer stuff here. But as none of these bankswitch
+ * while the game runs, memcpy will suffice.
+ */
+
+#include "../pico_int.h"
+
+
+/* 12-in-1 and 4-in-1. Assuming >= 2MB ROMs here. */
+static unsigned int carthw_12in1_baddr = 0;
+
+static carthw_state_chunk carthw_12in1_state[] =
+{
+ { CHUNK_CARTHW, sizeof(carthw_12in1_baddr), &carthw_12in1_baddr },
+ { 0, 0, NULL }
+};
+
+static unsigned int carthw_12in1_read16(unsigned int a, int realsize)
+{
+ // ??
+ elprintf(EL_UIO, "12-in-1: read [%06x] @ %06x", a, SekPc);
+ return 0;
+}
+
+static void carthw_12in1_write8(unsigned int a, unsigned int d, int realsize)
+{
+ int len;
+
+ if (a < 0xA13000 || a >= 0xA13040) {
+ /* 4-in-1 has Real Deal Boxing, which uses serial eeprom,
+ * but I really doubt that pirate cart had it */
+ if (a != 0x200001)
+ elprintf(EL_ANOMALY, "12-in-1: unexpected write [%06x] %02x @ %06x", a, d, SekPc);
+ return;
+ }
+
+ carthw_12in1_baddr = a;
+ a &= 0x3f; a <<= 16;
+ len = Pico.romsize - a;
+ if (len <= 0) {
+ elprintf(EL_ANOMALY|EL_STATUS, "12-in-1: missing bank @ %06x", a);
+ return;
+ }
+
+ memcpy(Pico.rom, Pico.rom + Pico.romsize + a, len);
+}
+
+static void carthw_12in1_reset(void)
+{
+ carthw_12in1_write8(0xA13000, 0, 0);
+}
+
+static void carthw_12in1_statef(void)
+{
+ carthw_12in1_write8(carthw_12in1_baddr, 0, 0);
+}
+
+void carthw_12in1_startup(void)
+{
+ void *tmp;
+
+ elprintf(EL_STATUS, "12-in-1 mapper detected");
+
+ tmp = realloc(Pico.rom, Pico.romsize * 2);
+ if (tmp == NULL)
+ {
+ elprintf(EL_STATUS, "OOM");
+ return;
+ }
+ Pico.rom = tmp;
+ memcpy(Pico.rom + Pico.romsize, Pico.rom, Pico.romsize);
+
+ PicoRead16Hook = carthw_12in1_read16;
+ PicoWrite8Hook = carthw_12in1_write8;
+ PicoResetHook = carthw_12in1_reset;
+ PicoLoadStateHook = carthw_12in1_statef;
+ carthw_chunks = carthw_12in1_state;
+}
+
+
+/* Realtec, based on TascoDLX doc
+ * http://www.sharemation.com/TascoDLX/REALTEC%20Cart%20Mapper%20-%20description%20v1.txt
+ */
+static int realtec_bank = 0x80000000, realtec_size = 0x80000000;
+static int realtec_romsize = 0;
+
+static void carthw_realtec_write8(unsigned int a, unsigned int d, int realsize)
+{
+ int i, bank_old = realtec_bank, size_old = realtec_size;
+
+ if (a == 0x400000)
+ {
+ realtec_bank &= 0x0e0000;
+ realtec_bank |= 0x300000 & (d << 19);
+ if (realtec_bank != bank_old)
+ elprintf(EL_ANOMALY, "write [%06x] %02x @ %06x", a, d, SekPc);
+ }
+ else if (a == 0x402000)
+ {
+ realtec_size = (d << 17) & 0x3e0000;
+ if (realtec_size != size_old)
+ elprintf(EL_ANOMALY, "write [%06x] %02x @ %06x", a, d, SekPc);
+ }
+ else if (a == 0x404000)
+ {
+ realtec_bank &= 0x300000;
+ realtec_bank |= 0x0e0000 & (d << 17);
+ if (realtec_bank != bank_old)
+ elprintf(EL_ANOMALY, "write [%06x] %02x @ %06x", a, d, SekPc);
+ }
+ else
+ elprintf(EL_ANOMALY, "realtec: unexpected write [%06x] %02x @ %06x", a, d, SekPc);
+
+ if (realtec_bank >= 0 && realtec_size >= 0 &&
+ (realtec_bank != bank_old || realtec_size != size_old))
+ {
+ elprintf(EL_ANOMALY, "realtec: new bank %06x, size %06x", realtec_bank, realtec_size, SekPc);
+ if (realtec_size > realtec_romsize - realtec_bank || realtec_bank >= realtec_romsize)
+ {
+ elprintf(EL_ANOMALY, "realtec: bank too large / out of range?");
+ return;
+ }
+
+ for (i = 0; i < 0x400000; i += realtec_size)
+ memcpy(Pico.rom + i, Pico.rom + 0x400000 + realtec_bank, realtec_size);
+ }
+}
+
+static void carthw_realtec_reset(void)
+{
+ int i;
+ /* map boot code */
+ for (i = 0; i < 0x400000; i += 0x2000)
+ memcpy(Pico.rom + i, Pico.rom + 0x400000 + realtec_romsize - 0x2000, 0x2000);
+ realtec_bank = realtec_size = 0x80000000;
+}
+
+void carthw_realtec_startup(void)
+{
+ void *tmp;
+
+ elprintf(EL_STATUS, "Realtec mapper detected");
+
+ realtec_romsize = Pico.romsize;
+ Pico.romsize = 0x400000;
+ tmp = realloc(Pico.rom, 0x400000 + realtec_romsize);
+ if (tmp == NULL)
+ {
+ elprintf(EL_STATUS, "OOM");
+ return;
+ }
+ Pico.rom = tmp;
+ memcpy(Pico.rom + 0x400000, Pico.rom, realtec_romsize);
+
+ PicoWrite8Hook = carthw_realtec_write8;
+ PicoResetHook = carthw_realtec_reset;
+}
+
+/* Radica mapper, based on DevSter's info
+ * http://devster.monkeeh.com/sega/radica/
+ */
+static unsigned int carthw_radica_baddr = 0;
+
+static carthw_state_chunk carthw_radica_state[] =
+{
+ { CHUNK_CARTHW, sizeof(carthw_radica_baddr), &carthw_radica_baddr },
+ { 0, 0, NULL }
+};
+
+static unsigned int carthw_radica_read16(unsigned int a, int realsize)
+{
+ if ((a & 0xffff80) != 0xa13000) {
+ elprintf(EL_UIO, "radica: r16 %06x", a);
+ return 0;
+ }
+
+ carthw_radica_baddr = a;
+ a = (a & 0x7e) << 15;
+ if (a >= Pico.romsize) {
+ elprintf(EL_ANOMALY|EL_STATUS, "radica: missing bank @ %06x", a);
+ return 0;
+ }
+ memcpy(Pico.rom, Pico.rom + Pico.romsize + a, Pico.romsize - a);
+
+ return 0;
+}
+
+static void carthw_radica_statef(void)
+{
+ carthw_radica_read16(carthw_radica_baddr, 0);
+}
+
+static void carthw_radica_reset(void)
+{
+ memcpy(Pico.rom, Pico.rom + Pico.romsize, Pico.romsize);
+}
+
+void carthw_radica_startup(void)
+{
+ void *tmp;
+
+ elprintf(EL_STATUS, "Radica mapper detected");
+
+ tmp = realloc(Pico.rom, Pico.romsize * 2);
+ if (tmp == NULL)
+ {
+ elprintf(EL_STATUS, "OOM");
+ return;
+ }
+ Pico.rom = tmp;
+ memcpy(Pico.rom + Pico.romsize, Pico.rom, Pico.romsize);
+
+ PicoRead16Hook = carthw_radica_read16;
+ PicoResetHook = carthw_radica_reset;
+ PicoLoadStateHook = carthw_radica_statef;
+ carthw_chunks = carthw_radica_state;
+}
+
+
notaz.gp2x.de / picodrive.git / blobdiff