void segaic16_memory_mapper_set_decrypted(running_machine *machine, UINT8 *decrypted)
{
struct memory_mapper_chip *chip = &memory_mapper;
offs_t romsize = chip->cpu->region()->bytes();
int rgnum;
/* loop over the regions */
for (rgnum = 0; chip->map[rgnum].regbase != 0; rgnum++)
{
static const offs_t region_size_map[4] = { 0x00ffff, 0x01ffff, 0x07ffff, 0x1fffff };
const segaic16_memory_map_entry *rgn = &chip->map[rgnum];
offs_t region_size = region_size_map[chip->regs[rgn->regbase] & 3];
offs_t region_base = (chip->regs[rgn->regbase + 1] << 16) & ~region_size;
offs_t region_start = region_base + (rgn->regoffs & region_size);
const char *readbank = rgn->readbank;
/* skip non-ROM regions */
if (readbank == NULL || rgn->romoffset == ~0)
continue;
/* skip any mappings beyond the ROM size */
if (region_start >= romsize)
continue;
memory_configure_bank_decrypted(machine, readbank, 0, 1, decrypted + region_start, 0);
memory_set_bank(machine, readbank, 0);
}
}
void seibu_sound_decrypt(int cpu_region,int length)
{
UINT8 *decrypt = auto_malloc(length);
UINT8 *rom = memory_region(cpu_region);
int i;
memory_set_decrypted_region(cpu_region - REGION_CPU1, 0x0000, (length < 0x10000) ? (length - 1) : 0x1fff, decrypt);
for (i = 0;i < length;i++)
{
UINT8 src = rom[i];
rom[i] = decrypt_data(i,src);
decrypt[i] = decrypt_opcode(i,src);
}
if (length > 0x10000)
memory_configure_bank_decrypted(1, 0, (length - 0x10000) / 0x8000, decrypt + 0x10000, 0x8000);
}
void seibu_sound_decrypt(running_machine *machine,const char *cpu,int length)
{
address_space *space = cputag_get_address_space(machine, cpu, ADDRESS_SPACE_PROGRAM);
UINT8 *decrypt = auto_alloc_array(machine, UINT8, length);
UINT8 *rom = machine->region(cpu)->base();
int i;
space->set_decrypted_region(0x0000, (length < 0x10000) ? (length - 1) : 0x1fff, decrypt);
for (i = 0;i < length;i++)
{
UINT8 src = rom[i];
rom[i] = decrypt_data(i,src);
decrypt[i] = decrypt_opcode(i,src);
}
if (length > 0x10000)
memory_configure_bank_decrypted(machine, "bank1", 0, (length - 0x10000) / 0x8000, decrypt + 0x10000, 0x8000);
}
static void update_memory_mapping(running_machine *machine, struct memory_mapper_chip *chip, int decrypt)
{
int rgnum;
if (LOG_MEMORY_MAP) mame_printf_debug("----\nRemapping:\n");
/* first reset everything back to the beginning */
memory_install_readwrite16_handler(cpu_get_address_space(chip->cpu, ADDRESS_SPACE_PROGRAM), 0x000000, 0xffffff, 0, 0, segaic16_memory_mapper_lsb_r, segaic16_memory_mapper_lsb_w);
/* loop over the regions */
for (rgnum = 0; chip->map[rgnum].regbase != 0; rgnum++)
{
static const offs_t region_size_map[4] = { 0x00ffff, 0x01ffff, 0x07ffff, 0x1fffff };
const segaic16_memory_map_entry *rgn = &chip->map[rgnum];
offs_t region_size = region_size_map[chip->regs[rgn->regbase] & 3];
offs_t region_base = (chip->regs[rgn->regbase + 1] << 16) & ~region_size;
offs_t region_mirror = rgn->mirror & region_size;
offs_t region_start = region_base + (rgn->regoffs & region_size);
offs_t region_end = region_start + ((rgn->length - 1 < region_size) ? rgn->length - 1 : region_size);
const char *writebank = rgn->writebank;
write16_space_func write = rgn->write;
const char *readbank = rgn->readbank;
read16_space_func read = rgn->read;
/* ROM areas need extra clamping */
if (rgn->romoffset != ~0)
{
offs_t romsize = chip->cpu->region()->bytes();
if (region_start >= romsize)
read = NULL;
else if (region_start + rgn->length > romsize)
region_end = romsize - 1;
}
/* map it */
if (read != NULL)
memory_install_read16_handler(cpu_get_address_space(chip->cpu, ADDRESS_SPACE_PROGRAM), region_start, region_end, 0, region_mirror, read);
else if (readbank != NULL)
memory_install_read_bank(cpu_get_address_space(chip->cpu, ADDRESS_SPACE_PROGRAM), region_start, region_end, 0, region_mirror, readbank);
if (write != NULL)
memory_install_write16_handler(cpu_get_address_space(chip->cpu, ADDRESS_SPACE_PROGRAM), region_start, region_end, 0, region_mirror, write);
else if (writebank != NULL)
memory_install_write_bank(cpu_get_address_space(chip->cpu, ADDRESS_SPACE_PROGRAM), region_start, region_end, 0, region_mirror, writebank);
/* set the bank pointer */
if (readbank != NULL)
{
if (rgn->base != NULL)
{
memory_configure_bank(machine, readbank, 0, 1, *rgn->base, 0);
memory_set_bank(machine, readbank, 0);
}
else if (rgn->romoffset != ~0)
{
UINT8 *decrypted = NULL;
if (decrypt)
{
decrypted = (UINT8 *)fd1094_get_decrypted_base();
if (!decrypted)
decrypted = (UINT8 *)fd1089_get_decrypted_base();
}
memory_configure_bank(machine, readbank, 0, 1, chip->cpu->region()->base() + region_start, 0);
if (decrypted)
memory_configure_bank_decrypted(machine, readbank, 0, 1, decrypted + region_start, 0);
memory_set_bank(machine, readbank, 0);
}
}
if (LOG_MEMORY_MAP) mame_printf_debug(" %06X-%06X (%06X) = %s\n", region_start, region_end, region_mirror, rgn->name);
}
}
