2 * Support for a few cart mappers.
4 * (c) Copyright 2008, Grazvydas "notaz" Ignotas
5 * Free for non-commercial use.
8 * I should better do some pointer stuff here. But as none of these bankswitch
9 * while the game runs, memcpy will suffice.
12 #include "../PicoInt.h"
15 /* 12-in-1 and 4-in-1. Assuming >= 2MB ROMs here. */
16 static unsigned int carthw_12in1_baddr = 0;
18 static carthw_state_chunk carthw_12in1_state[] =
20 { CHUNK_CARTHW, sizeof(carthw_12in1_baddr), &carthw_12in1_baddr },
24 static unsigned int carthw_12in1_read16(unsigned int a, int realsize)
27 elprintf(EL_UIO, "12-in-1: read [%06x] @ %06x", a, SekPc);
31 static void carthw_12in1_write8(unsigned int a, unsigned int d, int realsize)
35 if (a < 0xA13000 || a >= 0xA13040) {
36 /* 4-in-1 has Real Deal Boxing, which uses serial eeprom,
37 * but I really doubt that pirate cart had it */
39 elprintf(EL_ANOMALY, "12-in-1: unexpected write [%06x] %02x @ %06x", a, d, SekPc);
43 carthw_12in1_baddr = a;
45 len = Pico.romsize - a;
47 elprintf(EL_ANOMALY|EL_STATUS, "12-in-1: missing bank @ %06x", a);
51 memcpy(Pico.rom, Pico.rom + Pico.romsize + a, len);
54 static void carthw_12in1_reset(void)
56 carthw_12in1_write8(0xA13000, 0, 0);
59 static void carthw_12in1_statef(void)
61 carthw_12in1_write8(carthw_12in1_baddr, 0, 0);
64 void carthw_12in1_startup(void)
68 elprintf(EL_STATUS, "12-in-1 mapper detected");
70 tmp = realloc(Pico.rom, Pico.romsize * 2);
73 elprintf(EL_STATUS, "OOM");
77 memcpy(Pico.rom + Pico.romsize, Pico.rom, Pico.romsize);
79 PicoRead16Hook = carthw_12in1_read16;
80 PicoWrite8Hook = carthw_12in1_write8;
81 PicoResetHook = carthw_12in1_reset;
82 PicoLoadStateHook = carthw_12in1_statef;
83 carthw_chunks = carthw_12in1_state;
87 /* Realtec, based on TascoDLX doc
88 * http://www.sharemation.com/TascoDLX/REALTEC%20Cart%20Mapper%20-%20description%20v1.txt
90 static int realtec_bank = 0x80000000, realtec_size = 0x80000000;
91 static int realtec_romsize = 0;
93 static void carthw_realtec_write8(unsigned int a, unsigned int d, int realsize)
95 int i, bank_old = realtec_bank, size_old = realtec_size;
99 realtec_bank &= 0x0e0000;
100 realtec_bank |= 0x300000 & (d << 19);
101 if (realtec_bank != bank_old)
102 elprintf(EL_ANOMALY, "write [%06x] %02x @ %06x", a, d, SekPc);
104 else if (a == 0x402000)
106 realtec_size = (d << 17) & 0x3e0000;
107 if (realtec_size != size_old)
108 elprintf(EL_ANOMALY, "write [%06x] %02x @ %06x", a, d, SekPc);
110 else if (a == 0x404000)
112 realtec_bank &= 0x300000;
113 realtec_bank |= 0x0e0000 & (d << 17);
114 if (realtec_bank != bank_old)
115 elprintf(EL_ANOMALY, "write [%06x] %02x @ %06x", a, d, SekPc);
118 elprintf(EL_ANOMALY, "realtec: unexpected write [%06x] %02x @ %06x", a, d, SekPc);
120 if (realtec_bank >= 0 && realtec_size >= 0 &&
121 (realtec_bank != bank_old || realtec_size != size_old))
123 elprintf(EL_ANOMALY, "realtec: new bank %06x, size %06x", realtec_bank, realtec_size, SekPc);
124 if (realtec_size > realtec_romsize - realtec_bank || realtec_bank >= realtec_romsize)
126 elprintf(EL_ANOMALY, "realtec: bank too large / out of range?");
130 for (i = 0; i < 0x400000; i += realtec_size)
131 memcpy(Pico.rom + i, Pico.rom + 0x400000 + realtec_bank, realtec_size);
135 static void carthw_realtec_reset(void)
139 for (i = 0; i < 0x400000; i += 0x2000)
140 memcpy(Pico.rom + i, Pico.rom + 0x400000 + realtec_romsize - 0x2000, 0x2000);
141 realtec_bank = realtec_size = 0x80000000;
144 void carthw_realtec_startup(void)
148 elprintf(EL_STATUS, "Realtec mapper detected");
150 realtec_romsize = Pico.romsize;
151 Pico.romsize = 0x400000;
152 tmp = realloc(Pico.rom, 0x400000 + realtec_romsize);
155 elprintf(EL_STATUS, "OOM");
159 memcpy(Pico.rom + 0x400000, Pico.rom, realtec_romsize);
161 PicoWrite8Hook = carthw_realtec_write8;
162 PicoResetHook = carthw_realtec_reset;
165 /* Radica mapper, based on DevSter's info
166 * http://devster.monkeeh.com/sega/radica/
168 static unsigned int carthw_radica_baddr = 0;
170 static carthw_state_chunk carthw_radica_state[] =
172 { CHUNK_CARTHW, sizeof(carthw_radica_baddr), &carthw_radica_baddr },
176 static unsigned int carthw_radica_read16(unsigned int a, int realsize)
178 if ((a & 0xffff80) != 0xa13000) {
179 elprintf(EL_UIO, "radica: r16 %06x", a);
183 carthw_radica_baddr = a;
184 a = (a & 0x7e) << 15;
185 if (a >= Pico.romsize) {
186 elprintf(EL_ANOMALY|EL_STATUS, "radica: missing bank @ %06x", a);
189 memcpy(Pico.rom, Pico.rom + Pico.romsize + a, Pico.romsize - a);
194 static void carthw_radica_statef(void)
196 carthw_radica_read16(carthw_radica_baddr, 0);
199 static void carthw_radica_reset(void)
201 memcpy(Pico.rom, Pico.rom + Pico.romsize, Pico.romsize);
204 void carthw_radica_startup(void)
208 elprintf(EL_STATUS, "Radica mapper detected");
210 tmp = realloc(Pico.rom, Pico.romsize * 2);
213 elprintf(EL_STATUS, "OOM");
217 memcpy(Pico.rom + Pico.romsize, Pico.rom, Pico.romsize);
219 PicoRead16Hook = carthw_radica_read16;
220 PicoResetHook = carthw_radica_reset;
221 PicoLoadStateHook = carthw_radica_statef;
222 carthw_chunks = carthw_radica_state;