void ines_mapr_setup( int mapper, int *pcb_id )
{
const nes_mmc *mmc = nes_mapper_lookup(mapper);
if (mmc == NULL)
fatalerror("Unimplemented Mapper %d\n", mapper);
*pcb_id = mmc->pcb_id;
}
int nes_get_mmc_id( running_machine &machine, int mapper )
{
const nes_mmc *mmc = nes_mapper_lookup(mapper);
if (mmc == NULL)
fatalerror("Unimplemented Mapper %d\n", mapper);
return mmc->pcb_id;
}
static void init_nes_core (void)
{
/* We set these here in case they weren't set in the cart loader */
nes.rom = memory_region(REGION_CPU1);
nes.vrom = memory_region(REGION_GFX1);
nes.vram = memory_region(REGION_GFX2);
nes.wram = memory_region(REGION_USER1);
/* Brutal hack put in as a consequence of the new memory system; we really
* need to fix the NES code */
memory_install_read8_handler(0, ADDRESS_SPACE_PROGRAM, 0x0000, 0x07ff, 0, 0x1800, MRA8_BANK10);
memory_install_write8_handler(0, ADDRESS_SPACE_PROGRAM, 0x0000, 0x07ff, 0, 0x1800, MWA8_BANK10);
memory_set_bankptr(10, nes.rom);
battery_ram = nes.wram;
/* Set up the memory handlers for the mapper */
switch (nes.mapper)
{
case 20:
nes.slow_banking = 0;
memory_install_read8_handler(0, ADDRESS_SPACE_PROGRAM, 0x4030, 0x403f, 0, 0, fds_r);
memory_install_read8_handler(0, ADDRESS_SPACE_PROGRAM, 0x6000, 0xdfff, 0, 0, MRA8_RAM);
memory_install_read8_handler(0, ADDRESS_SPACE_PROGRAM, 0xe000, 0xffff, 0, 0, MRA8_ROM);
memory_install_write8_handler(0, ADDRESS_SPACE_PROGRAM, 0x4020, 0x402f, 0, 0, fds_w);
memory_install_write8_handler(0, ADDRESS_SPACE_PROGRAM, 0x6000, 0xdfff, 0, 0, MWA8_RAM);
memory_install_write8_handler(0, ADDRESS_SPACE_PROGRAM, 0xe000, 0xffff, 0, 0, MWA8_ROM);
break;
case 40:
nes.slow_banking = 1;
/* Game runs code in between banks, so we do things different */
memory_install_read8_handler(0, ADDRESS_SPACE_PROGRAM, 0x6000, 0x7fff, 0, 0, MRA8_RAM);
memory_install_read8_handler(0, ADDRESS_SPACE_PROGRAM, 0x8000, 0xffff, 0, 0, MRA8_ROM);
memory_install_write8_handler(0, ADDRESS_SPACE_PROGRAM, 0x6000, 0x7fff, 0, 0, nes_mid_mapper_w);
memory_install_write8_handler(0, ADDRESS_SPACE_PROGRAM, 0x8000, 0xffff, 0, 0, nes_mapper_w);
break;
default:
nes.slow_banking = 0;
memory_install_read8_handler(0, ADDRESS_SPACE_PROGRAM, 0x6000, 0x7fff, 0, 0, MRA8_BANK5);
memory_install_read8_handler(0, ADDRESS_SPACE_PROGRAM, 0x8000, 0x9fff, 0, 0, MRA8_BANK1);
memory_install_read8_handler(0, ADDRESS_SPACE_PROGRAM, 0xa000, 0xbfff, 0, 0, MRA8_BANK2);
memory_install_read8_handler(0, ADDRESS_SPACE_PROGRAM, 0xc000, 0xdfff, 0, 0, MRA8_BANK3);
memory_install_read8_handler(0, ADDRESS_SPACE_PROGRAM, 0xe000, 0xffff, 0, 0, MRA8_BANK4);
memory_install_write8_handler(0, ADDRESS_SPACE_PROGRAM, 0x6000, 0x7fff, 0, 0, nes_mid_mapper_w);
memory_install_write8_handler(0, ADDRESS_SPACE_PROGRAM, 0x8000, 0xffff, 0, 0, nes_mapper_w);
break;
}
/* Set up the mapper callbacks */
{
const mmc *mapper;
mapper = nes_mapper_lookup(nes.mapper);
if (mapper)
{
mmc_write_low = mapper->mmc_write_low;
mmc_read_low = mapper->mmc_read_low;
mmc_write_mid = mapper->mmc_write_mid;
mmc_write = mapper->mmc_write;
ppu_latch = mapper->ppu_latch;
// mmc_irq = mmc_list[i].mmc_irq;
}
else
{
logerror ("Mapper %d is not yet supported, defaulting to no mapper.\n",nes.mapper);
mmc_write_low = mmc_write_mid = mmc_write = NULL;
mmc_read_low = NULL;
}
}
/* Load a battery file, but only if there's no trainer since they share */
/* overlapping memory. */
if (nes.trainer) return;
/* We need this because battery ram is loaded before the */
/* memory subsystem is set up. When this routine is called */
/* everything is ready, so we can just copy over the data */
/* we loaded before. */
memcpy (battery_ram, battery_data, BATTERY_SIZE);
}
