mirror of
https://github.com/RaySollium99/picodrive.git
synced 2025-10-27 21:48:50 +01:00
000f53350c
git-svn-id: file:///home/notaz/opt/svn/PicoDrive@771 be3aeb3a-fb24-0410-a615-afba39da0efa
506 lines
12 KiB
C
506 lines
12 KiB
C
/*
|
|
* Support for a few cart mappers and some protection.
|
|
*
|
|
* (c) Copyright 2008-2009, Grazvydas "notaz" Ignotas
|
|
* Free for non-commercial use.
|
|
*
|
|
*/
|
|
|
|
#include "../pico_int.h"
|
|
#include "../memory.h"
|
|
|
|
|
|
/* The SSFII mapper */
|
|
unsigned char ssf2_banks[8];
|
|
|
|
static carthw_state_chunk carthw_ssf2_state[] =
|
|
{
|
|
{ CHUNK_CARTHW, sizeof(ssf2_banks), &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;
|
|
|
|
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);
|
|
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_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), ssf2_banks[i]);
|
|
}
|
|
|
|
void carthw_ssf2_startup(void)
|
|
{
|
|
int i;
|
|
|
|
elprintf(EL_STATUS, "SSF2 mapper startup");
|
|
|
|
// default map
|
|
for (i = 0; i < 8; i++)
|
|
ssf2_banks[i] = i;
|
|
|
|
PicoCartMemSetup = carthw_ssf2_mem_setup;
|
|
PicoLoadStateHook = carthw_ssf2_statef;
|
|
carthw_chunks = carthw_ssf2_state;
|
|
}
|
|
|
|
|
|
/* Common *-in-1 pirate mapper.
|
|
* Switches banks based on addr lines when /TIME is set.
|
|
* TODO: verify
|
|
*/
|
|
static unsigned int carthw_Xin1_baddr = 0;
|
|
|
|
static void carthw_Xin1_do(u32 a, int mask, int shift)
|
|
{
|
|
int len;
|
|
|
|
carthw_Xin1_baddr = a;
|
|
a &= mask;
|
|
a <<= shift;
|
|
len = Pico.romsize - a;
|
|
if (len <= 0) {
|
|
elprintf(EL_ANOMALY|EL_STATUS, "X-in-1: missing bank @ %06x", a);
|
|
return;
|
|
}
|
|
|
|
len = (len + M68K_BANK_MASK) & ~M68K_BANK_MASK;
|
|
cpu68k_map_set(m68k_read8_map, 0x000000, len - 1, Pico.rom + a, 0);
|
|
cpu68k_map_set(m68k_read16_map, 0x000000, len - 1, Pico.rom + a, 0);
|
|
}
|
|
|
|
static carthw_state_chunk carthw_Xin1_state[] =
|
|
{
|
|
{ CHUNK_CARTHW, sizeof(carthw_Xin1_baddr), &carthw_Xin1_baddr },
|
|
{ 0, 0, NULL }
|
|
};
|
|
|
|
// TODO: test a0, reads, w16
|
|
static void carthw_Xin1_write8(u32 a, u32 d)
|
|
{
|
|
if ((a & 0xffff00) != 0xa13000) {
|
|
PicoWrite8_io(a, d);
|
|
return;
|
|
}
|
|
|
|
carthw_Xin1_do(a, 0x3f, 16);
|
|
}
|
|
|
|
static void carthw_Xin1_mem_setup(void)
|
|
{
|
|
cpu68k_map_set(m68k_write8_map, 0xa10000, 0xa1ffff, carthw_Xin1_write8, 1);
|
|
}
|
|
|
|
static void carthw_Xin1_reset(void)
|
|
{
|
|
carthw_Xin1_write8(0xa13000, 0);
|
|
}
|
|
|
|
static void carthw_Xin1_statef(void)
|
|
{
|
|
carthw_Xin1_write8(carthw_Xin1_baddr, 0);
|
|
}
|
|
|
|
void carthw_Xin1_startup(void)
|
|
{
|
|
elprintf(EL_STATUS, "X-in-1 mapper startup");
|
|
|
|
PicoCartMemSetup = carthw_Xin1_mem_setup;
|
|
PicoResetHook = carthw_Xin1_reset;
|
|
PicoLoadStateHook = carthw_Xin1_statef;
|
|
carthw_chunks = carthw_Xin1_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 void carthw_realtec_write8(u32 a, u32 d)
|
|
{
|
|
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 > Pico.romsize - realtec_bank)
|
|
{
|
|
elprintf(EL_ANOMALY, "realtec: bank too large / out of range?");
|
|
return;
|
|
}
|
|
|
|
for (i = 0; i < 0x400000; i += realtec_size) {
|
|
cpu68k_map_set(m68k_read8_map, i, realtec_size - 1, Pico.rom + realtec_bank, 0);
|
|
cpu68k_map_set(m68k_read16_map, i, realtec_size - 1, Pico.rom + realtec_bank, 0);
|
|
}
|
|
}
|
|
}
|
|
|
|
static void carthw_realtec_reset(void)
|
|
{
|
|
int i;
|
|
|
|
/* map boot code */
|
|
for (i = 0; i < 0x400000; i += M68K_BANK_SIZE) {
|
|
cpu68k_map_set(m68k_read8_map, i, i + M68K_BANK_SIZE - 1, Pico.rom + Pico.romsize, 0);
|
|
cpu68k_map_set(m68k_read16_map, i, i + M68K_BANK_SIZE - 1, Pico.rom + Pico.romsize, 0);
|
|
}
|
|
cpu68k_map_set(m68k_write8_map, 0x400000, 0x400000 + M68K_BANK_SIZE - 1, carthw_realtec_write8, 1);
|
|
realtec_bank = realtec_size = 0x80000000;
|
|
}
|
|
|
|
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)
|
|
{
|
|
elprintf(EL_STATUS, "OOM");
|
|
return;
|
|
}
|
|
Pico.rom = tmp;
|
|
|
|
// create bank for boot code
|
|
for (i = 0; i < M68K_BANK_SIZE; i += 0x2000)
|
|
memcpy(Pico.rom + Pico.romsize + i, Pico.rom + Pico.romsize - 0x2000, 0x2000);
|
|
|
|
PicoResetHook = carthw_realtec_reset;
|
|
}
|
|
|
|
/* Radica mapper, based on DevSter's info
|
|
* http://devster.monkeeh.com/sega/radica/
|
|
* XXX: mostly the same as X-in-1, merge?
|
|
*/
|
|
static u32 carthw_radica_read16(u32 a)
|
|
{
|
|
if ((a & 0xffff00) != 0xa13000)
|
|
return PicoRead16_io(a);
|
|
|
|
carthw_Xin1_do(a, 0x7e, 15);
|
|
|
|
return 0;
|
|
}
|
|
|
|
static void carthw_radica_mem_setup(void)
|
|
{
|
|
cpu68k_map_set(m68k_read16_map, 0xa10000, 0xa1ffff, carthw_radica_read16, 1);
|
|
}
|
|
|
|
static void carthw_radica_statef(void)
|
|
{
|
|
carthw_radica_read16(carthw_Xin1_baddr);
|
|
}
|
|
|
|
static void carthw_radica_reset(void)
|
|
{
|
|
carthw_radica_read16(0xa13000);
|
|
}
|
|
|
|
void carthw_radica_startup(void)
|
|
{
|
|
elprintf(EL_STATUS, "Radica mapper startup");
|
|
|
|
PicoCartMemSetup = carthw_radica_mem_setup;
|
|
PicoResetHook = carthw_radica_reset;
|
|
PicoLoadStateHook = carthw_radica_statef;
|
|
carthw_chunks = carthw_Xin1_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)
|
|
{
|
|
void *tmp;
|
|
|
|
elprintf(EL_STATUS, "lk3 prot emu startup");
|
|
|
|
// allocate space for bank0 backup
|
|
tmp = realloc(Pico.rom, Pico.romsize + 0x8000);
|
|
if (tmp == NULL)
|
|
{
|
|
elprintf(EL_STATUS, "OOM");
|
|
return;
|
|
}
|
|
Pico.rom = tmp;
|
|
memcpy(Pico.rom + Pico.romsize, Pico.rom, 0x8000);
|
|
|
|
PicoCartMemSetup = carthw_prot_lk3_mem_setup;
|
|
}
|
|
|