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mame/src/mess/machine/nes.c
Nathan Woods 42b6aa8507 [NES MESS] Minor cleanups
2012-11-25 14:40:31 +00:00

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/*****************************************************************************
nes.c
Nintendo Entertainment System (Famicom)
****************************************************************************/
#include "emu.h"
#include "crsshair.h"
#include "cpu/m6502/m6502.h"
#include "video/ppu2c0x.h"
#include "includes/nes.h"
//#include "includes/nes_mmc.h"
#include "imagedev/cartslot.h"
#include "imagedev/flopdrv.h"
#include "hashfile.h"
/***************************************************************************
CONSTANTS
***************************************************************************/
/* Set to dump info about the inputs to the errorlog */
#define LOG_JOY 0
/* Set to generate prg & chr files when the cart is loaded */
#define SPLIT_PRG 0
#define SPLIT_CHR 0
/***************************************************************************
FUNCTION PROTOTYPES
***************************************************************************/
static void fds_irq(device_t *device, int scanline, int vblank, int blanked);
/***************************************************************************
FUNCTIONS
***************************************************************************/
void nes_state::init_nes_core()
{
address_space &space = machine().device("maincpu")->memory().space(AS_PROGRAM);
static const char *const bank_names[] = { "bank1", "bank2", "bank3", "bank4" };
int prg_banks = (m_prg_chunks == 1) ? (2 * 2) : (m_prg_chunks * 2);
int i;
m_rom = machine().root_device().memregion("maincpu")->base();
m_ciram = machine().root_device().memregion("ciram")->base();
// other pointers got set in the loading routine
/* Brutal hack put in as a consequence of the new memory system; we really need to fix the NES code */
space.install_readwrite_bank(0x0000, 0x07ff, 0, 0x1800, "bank10");
machine().device("ppu")->memory().space(AS_PROGRAM).install_readwrite_handler(0, 0x1fff, read8_delegate(FUNC(nes_state::nes_chr_r),this), write8_delegate(FUNC(nes_state::nes_chr_w),this));
machine().device("ppu")->memory().space(AS_PROGRAM).install_readwrite_handler(0x2000, 0x3eff, read8_delegate(FUNC(nes_state::nes_nt_r),this), write8_delegate(FUNC(nes_state::nes_nt_w),this));
membank("bank10")->set_base(m_rom);
/* If there is Disk Expansion and no cart has been loaded, setup memory accordingly */
if (m_disk_expansion && m_pcb_id == NO_BOARD)
{
/* If we are loading a disk we have already filled m_fds_data and we don't want to overwrite it,
if we are loading a cart image identified as mapper 20 (probably wrong mapper...) we need to alloc
memory for use in nes_fds_r/nes_fds_w. Same goes for allocation of fds_ram (used for bank2) */
if (m_fds_data == NULL)
{
UINT32 size = (m_prg_chunks == 1) ? 2 * 0x4000 : m_prg_chunks * 0x4000;
m_fds_data = auto_alloc_array_clear(machine(), UINT8, size);
memcpy(m_fds_data, m_prg, size); // copy in fds_data the cart PRG
}
if (m_fds_ram == NULL)
m_fds_ram = auto_alloc_array(machine(), UINT8, 0x8000);
space.install_read_handler(0x4030, 0x403f, read8_delegate(FUNC(nes_state::nes_fds_r),this));
space.install_read_bank(0x6000, 0xdfff, "bank2");
space.install_read_bank(0xe000, 0xffff, "bank1");
space.install_write_handler(0x4020, 0x402f, write8_delegate(FUNC(nes_state::nes_fds_w),this));
space.install_write_bank(0x6000, 0xdfff, "bank2");
membank("bank1")->set_base(&m_rom[0xe000]);
membank("bank2")->set_base(m_fds_ram);
return;
}
/* Set up the mapper callbacks */
pcb_handlers_setup();
/* Set up the memory handlers for the mapper */
space.install_read_bank(0x8000, 0x9fff, "bank1");
space.install_read_bank(0xa000, 0xbfff, "bank2");
space.install_read_bank(0xc000, 0xdfff, "bank3");
space.install_read_bank(0xe000, 0xffff, "bank4");
space.install_readwrite_bank(0x6000, 0x7fff, "bank5");
/* configure banks 1-4 */
for (i = 0; i < 4; i++)
{
membank(bank_names[i])->configure_entries(0, prg_banks, m_prg, 0x2000);
// some mappers (e.g. MMC5) can map PRG RAM in 0x8000-0xffff as well
if (m_prg_ram)
membank(bank_names[i])->configure_entries(prg_banks, m_wram_size / 0x2000, m_wram, 0x2000);
// however, at start we point to PRG ROM
membank(bank_names[i])->set_entry(i);
m_prg_bank[i] = i;
}
/* bank 5 configuration is more delicate, since it can have PRG RAM, PRG ROM or SRAM mapped to it */
/* we first map PRG ROM banks, then the battery bank (if a battery is present), and finally PRG RAM (m_wram) */
membank("bank5")->configure_entries(0, prg_banks, m_prg, 0x2000);
m_battery_bank5_start = prg_banks;
m_prgram_bank5_start = prg_banks;
m_empty_bank5_start = prg_banks;
/* add battery ram, but only if there's no trainer since they share overlapping memory. */
if (m_battery && !m_trainer)
{
UINT32 bank_size = (m_battery_size > 0x2000) ? 0x2000 : m_battery_size;
int bank_num = (m_battery_size > 0x2000) ? m_battery_size / 0x2000 : 1;
membank("bank5")->configure_entries(prg_banks, bank_num, m_battery_ram, bank_size);
m_prgram_bank5_start += bank_num;
m_empty_bank5_start += bank_num;
}
/* add prg ram. */
if (m_prg_ram)
{
membank("bank5")->configure_entries(m_prgram_bank5_start, m_wram_size / 0x2000, m_wram, 0x2000);
m_empty_bank5_start += m_wram_size / 0x2000;
}
membank("bank5")->configure_entry(m_empty_bank5_start, m_rom + 0x6000);
/* if we have any additional PRG RAM, point bank5 to its first bank */
if (m_battery || m_prg_ram)
m_prg_bank[4] = m_battery_bank5_start;
else
m_prg_bank[4] = m_empty_bank5_start; // or shall we point to "maincpu" region at 0x6000? point is that we should never access this region if no sram or wram is present!
membank("bank5")->set_entry(m_prg_bank[4]);
if (m_four_screen_vram)
{
m_extended_ntram = auto_alloc_array_clear(machine(), UINT8, 0x2000);
save_pointer(NAME(m_extended_ntram), 0x2000);
}
if (m_four_screen_vram)
set_nt_mirroring(PPU_MIRROR_4SCREEN);
else
{
switch (m_hard_mirroring)
{
case PPU_MIRROR_HORZ:
case PPU_MIRROR_VERT:
case PPU_MIRROR_HIGH:
case PPU_MIRROR_LOW:
set_nt_mirroring(m_hard_mirroring);
break;
default:
set_nt_mirroring(PPU_MIRROR_NONE);
break;
}
}
// there are still some quirk about writes to bank5... I hope to fix them soon. (mappers 34,45,52,246 have both mid_w and WRAM-->check)
if (!m_mmc_write_mid.isnull())
space.install_write_handler(0x6000, 0x7fff, m_mmc_write_mid);
if (!m_mmc_write.isnull())
space.install_write_handler(0x8000, 0xffff, m_mmc_write);
// In fact, we also allow single pcbs to overwrite the bank read handlers defined above,
// because some pcbs (mainly pirate ones) require protection values to be read instead of
// the expected ROM banks: these handlers, though, must take care of the ROM access as well
if (!m_mmc_read_mid.isnull())
space.install_read_handler(0x6000, 0x7fff, m_mmc_read_mid);
if (!m_mmc_read.isnull())
space.install_read_handler(0x8000, 0xffff, m_mmc_read);
// install additional handlers
if (m_pcb_id == BTL_SMB2B || m_mapper == 50)
{
space.install_write_handler(0x4020, 0x403f, write8_delegate(FUNC(nes_state::smb2jb_extra_w),this));
space.install_write_handler(0x40a0, 0x40bf, write8_delegate(FUNC(nes_state::smb2jb_extra_w),this));
}
if (m_pcb_id == KAISER_KS7017)
{
space.install_read_handler(0x4030, 0x4030, read8_delegate(FUNC(nes_state::ks7017_extra_r),this));
space.install_write_handler(0x4020, 0x40ff, write8_delegate(FUNC(nes_state::ks7017_extra_w),this));
}
if (m_pcb_id == UNL_603_5052)
{
space.install_read_handler(0x4020, 0x40ff, read8_delegate(FUNC(nes_state::unl_6035052_extra_r),this));
space.install_write_handler(0x4020, 0x40ff, write8_delegate(FUNC(nes_state::unl_6035052_extra_w),this));
}
if (m_pcb_id == WAIXING_SH2)
machine().device("ppu")->memory().space(AS_PROGRAM).install_read_handler(0, 0x1fff, read8_delegate(FUNC(nes_state::waixing_sh2_chr_r),this));
}
// to be probably removed (it does nothing since a long time)
int nes_ppu_vidaccess( device_t *device, int address, int data )
{
return data;
}
void nes_state::machine_reset()
{
/* Reset the mapper variables. Will also mark the char-gen ram as dirty */
if (m_disk_expansion && m_pcb_id == NO_BOARD)
m_ppu->set_hblank_callback(fds_irq);
else
nes_pcb_reset();
/* Reset the serial input ports */
m_in_0.shift = 0;
m_in_1.shift = 0;
machine().device("maincpu")->reset();
}
TIMER_CALLBACK_MEMBER(nes_state::nes_irq_callback)
{
m_maincpu->set_input_line(M6502_IRQ_LINE, HOLD_LINE);
m_irq_timer->adjust(attotime::never);
}
static void nes_banks_restore(nes_state *state)
{
state->membank("bank1")->set_entry(state->m_prg_bank[0]);
state->membank("bank2")->set_entry(state->m_prg_bank[1]);
state->membank("bank3")->set_entry(state->m_prg_bank[2]);
state->membank("bank4")->set_entry(state->m_prg_bank[3]);
state->membank("bank5")->set_entry(state->m_prg_bank[4]);
}
static void nes_state_register( running_machine &machine )
{
nes_state *state = machine.driver_data<nes_state>();
state->save_item(NAME(state->m_prg_bank));
state->save_item(NAME(state->m_MMC5_floodtile));
state->save_item(NAME(state->m_MMC5_floodattr));
state->save_item(NAME(state->m_mmc5_vram_control));
state->save_item(NAME(state->m_nes_vram_sprite));
state->save_item(NAME(state->m_last_frame_flip));
// shared mapper variables
state->save_item(NAME(state->m_IRQ_enable));
state->save_item(NAME(state->m_IRQ_enable_latch));
state->save_item(NAME(state->m_IRQ_count));
state->save_item(NAME(state->m_IRQ_count_latch));
state->save_item(NAME(state->m_IRQ_toggle));
state->save_item(NAME(state->m_IRQ_reset));
state->save_item(NAME(state->m_IRQ_status));
state->save_item(NAME(state->m_IRQ_mode));
state->save_item(NAME(state->m_mult1));
state->save_item(NAME(state->m_mult2));
state->save_item(NAME(state->m_mmc_chr_source));
state->save_item(NAME(state->m_mmc_cmd1));
state->save_item(NAME(state->m_mmc_cmd2));
state->save_item(NAME(state->m_mmc_count));
state->save_item(NAME(state->m_mmc_prg_base));
state->save_item(NAME(state->m_mmc_prg_mask));
state->save_item(NAME(state->m_mmc_chr_base));
state->save_item(NAME(state->m_mmc_chr_mask));
state->save_item(NAME(state->m_mmc_prg_bank));
state->save_item(NAME(state->m_mmc_vrom_bank));
state->save_item(NAME(state->m_mmc_extra_bank));
state->save_item(NAME(state->m_fds_motor_on));
state->save_item(NAME(state->m_fds_door_closed));
state->save_item(NAME(state->m_fds_current_side));
state->save_item(NAME(state->m_fds_head_position));
state->save_item(NAME(state->m_fds_status0));
state->save_item(NAME(state->m_fds_read_mode));
state->save_item(NAME(state->m_fds_write_reg));
state->save_item(NAME(state->m_fds_last_side));
state->save_item(NAME(state->m_fds_count));
state->save_pointer(NAME(state->m_wram), state->m_wram_size);
if (state->m_battery)
state->save_pointer(NAME(state->m_battery_ram), state->m_battery_size);
machine.save().register_postload(save_prepost_delegate(FUNC(nes_banks_restore), state));
}
//-------------------------------------------------
// machine_start
//-------------------------------------------------
void nes_state::machine_start()
{
m_ppu = machine().device<ppu2c0x_device>("ppu");
init_nes_core();
m_maincpu = machine().device<cpu_device>("maincpu");
m_sound = machine().device("nessound");
m_cart = machine().device("cart");
m_io_ctrlsel = ioport("CTRLSEL");
m_prg_bank_mem[0] = membank("bank1");
m_prg_bank_mem[1] = membank("bank2");
m_prg_bank_mem[2] = membank("bank3");
m_prg_bank_mem[3] = membank("bank4");
m_prg_bank_mem[4] = membank("bank5");
// If we're starting famicom with no disk inserted, we still haven't initialized the VRAM needed for
// video emulation, so we need to take care of it now
if (!m_vram)
{
m_vram = auto_alloc_array(machine(), UINT8, 0x4000);
for (int i = 0; i < 8; i++)
{
m_chr_map[i].source = CHRRAM;
m_chr_map[i].origin = i * 0x400; // for save state uses!
m_chr_map[i].access = &m_vram[m_chr_map[i].origin];
}
}
m_irq_timer = machine().scheduler().timer_alloc(timer_expired_delegate(FUNC(nes_state::nes_irq_callback),this));
nes_state_register(machine());
}
//-------------------------------------------------
// machine_stop
//-------------------------------------------------
void nes_state::machine_stop()
{
device_image_interface *image = dynamic_cast<device_image_interface *>(m_cart);
/* Write out the battery file if necessary */
if (m_battery)
image->battery_save(m_battery_ram, m_battery_size);
if (m_mapper_bram_size)
image->battery_save(m_mapper_bram, m_mapper_bram_size);
}
//-------------------------------------------------
// update_prg_banks
//-------------------------------------------------
void nes_state::update_prg_banks(int prg_bank_start, int prg_bank_end)
{
for (int prg_bank = prg_bank_start; prg_bank <= prg_bank_end; prg_bank++)
{
assert(prg_bank >= 0);
assert(prg_bank < ARRAY_LENGTH(m_prg_bank));
assert(prg_bank < ARRAY_LENGTH(m_prg_bank_mem));
m_prg_bank_mem[prg_bank]->set_entry(m_prg_bank[prg_bank]);
}
}
READ8_MEMBER(nes_state::nes_IN0_r)
{
int cfg = m_io_ctrlsel->read();
int ret;
if ((cfg & 0x000f) >= 0x08) // for now we treat the FC keyboard separately from other inputs!
{
// here we should have the tape input
ret = 0;
}
else
{
/* Some games expect bit 6 to be set because the last entry on the data bus shows up */
/* in the unused upper 3 bits, so typically a read from $4016 leaves 0x40 there. */
ret = 0x40;
ret |= ((m_in_0.i0 >> m_in_0.shift) & 0x01);
/* zapper */
if ((cfg & 0x000f) == 0x0002)
{
int x = m_in_0.i1; /* read Zapper x-position */
int y = m_in_0.i2; /* read Zapper y-position */
UINT32 pix, color_base;
/* get the pixel at the gun position */
pix = m_ppu->get_pixel(x, y);
/* get the color base from the ppu */
color_base = m_ppu->get_colorbase();
/* look at the screen and see if the cursor is over a bright pixel */
if ((pix == color_base + 0x20) || (pix == color_base + 0x30) ||
(pix == color_base + 0x33) || (pix == color_base + 0x34))
{
ret &= ~0x08; /* sprite hit */
}
else
ret |= 0x08; /* no sprite hit */
/* If button 1 is pressed, indicate the light gun trigger is pressed */
ret |= ((m_in_0.i0 & 0x01) << 4);
}
if (LOG_JOY)
logerror("joy 0 read, val: %02x, pc: %04x, bits read: %d, chan0: %08x\n", ret, space.device().safe_pc(), m_in_0.shift, m_in_0.i0);
m_in_0.shift++;
}
return ret;
}
// row of the keyboard matrix are read 4-bits at time, and gets returned as bit1->bit4
static UINT8 nes_read_fc_keyboard_line( running_machine &machine, UINT8 scan, UINT8 mode )
{
static const char *const fc_keyport_names[] = { "FCKEY0", "FCKEY1", "FCKEY2", "FCKEY3", "FCKEY4", "FCKEY5", "FCKEY6", "FCKEY7", "FCKEY8" };
nes_state *state = machine.driver_data<nes_state>();
return ((state->ioport(fc_keyport_names[scan])->read() >> (mode * 4)) & 0x0f) << 1;
}
static UINT8 nes_read_subor_keyboard_line( running_machine &machine, UINT8 scan, UINT8 mode )
{
static const char *const sub_keyport_names[] = { "SUBKEY0", "SUBKEY1", "SUBKEY2", "SUBKEY3", "SUBKEY4",
"SUBKEY5", "SUBKEY6", "SUBKEY7", "SUBKEY8", "SUBKEY9", "SUBKEY10", "SUBKEY11", "SUBKEY12" };
nes_state *state = machine.driver_data<nes_state>();
return ((state->ioport(sub_keyport_names[scan])->read() >> (mode * 4)) & 0x0f) << 1;
}
READ8_MEMBER(nes_state::nes_IN1_r)
{
int cfg = m_io_ctrlsel->read();
int ret;
if ((cfg & 0x000f) == 0x08) // for now we treat the FC keyboard separately from other inputs!
{
if (m_fck_scan < 9)
ret = ~nes_read_fc_keyboard_line(machine(), m_fck_scan, m_fck_mode) & 0x1e;
else
ret = 0x1e;
}
else if ((cfg & 0x000f) == 0x09) // for now we treat the Subor keyboard separately from other inputs!
{
if (m_fck_scan < 12)
ret = ~nes_read_subor_keyboard_line(machine(), m_fck_scan, m_fck_mode) & 0x1e;
else
ret = 0x1e;
}
else
{
/* Some games expect bit 6 to be set because the last entry on the data bus shows up */
/* in the unused upper 3 bits, so typically a read from $4017 leaves 0x40 there. */
ret = 0x40;
/* Handle data line 0's serial output */
ret |= ((m_in_1.i0 >> m_in_1.shift) & 0x01);
/* zapper */
if ((cfg & 0x00f0) == 0x0030)
{
int x = m_in_1.i1; /* read Zapper x-position */
int y = m_in_1.i2; /* read Zapper y-position */
UINT32 pix, color_base;
/* get the pixel at the gun position */
pix = m_ppu->get_pixel(x, y);
/* get the color base from the ppu */
color_base = m_ppu->get_colorbase();
/* look at the screen and see if the cursor is over a bright pixel */
if ((pix == color_base + 0x20) || (pix == color_base + 0x30) ||
(pix == color_base + 0x33) || (pix == color_base + 0x34))
{
ret &= ~0x08; /* sprite hit */
}
else
ret |= 0x08; /* no sprite hit */
/* If button 1 is pressed, indicate the light gun trigger is pressed */
ret |= ((m_in_1.i0 & 0x01) << 4);
}
/* arkanoid dial */
else if ((cfg & 0x00f0) == 0x0040)
{
/* Handle data line 2's serial output */
ret |= ((m_in_1.i2 >> m_in_1.shift) & 0x01) << 3;
/* Handle data line 3's serial output - bits are reversed */
/* NPW 27-Nov-2007 - there is no third subscript! commenting out */
/* ret |= ((m_in_1[3] >> m_in_1.shift) & 0x01) << 4; */
/* ret |= ((m_in_1[3] << m_in_1.shift) & 0x80) >> 3; */
}
if (LOG_JOY)
logerror("joy 1 read, val: %02x, pc: %04x, bits read: %d, chan0: %08x\n", ret, space.device().safe_pc(), m_in_1.shift, m_in_1.i0);
m_in_1.shift++;
}
return ret;
}
// FIXME: this is getting messier and messier (no pun intended). inputs reading should be simplified and port_categories cleaned up
// to also emulate the fact that nothing should be in Port 2 if there is a Crazy Climber pad, etc.
static void nes_read_input_device( running_machine &machine, int cfg, nes_input *vals, int pad_port, int supports_zapper )
{
nes_state *state = machine.driver_data<nes_state>();
static const char *const padnames[] = { "PAD1", "PAD2", "PAD3", "PAD4", "CC_LEFT", "CC_RIGHT" };
vals->i0 = 0;
vals->i1 = 0;
vals->i2 = 0;
switch (cfg & 0x0f)
{
case 0x01: /* gamepad */
if (pad_port >= 0)
vals->i0 = machine.root_device().ioport(padnames[pad_port])->read();
break;
case 0x02: /* zapper 1 */
if (supports_zapper)
{
vals->i0 = machine.root_device().ioport("ZAPPER1_T")->read();
vals->i1 = machine.root_device().ioport("ZAPPER1_X")->read();
vals->i2 = machine.root_device().ioport("ZAPPER1_Y")->read();
}
break;
case 0x03: /* zapper 2 */
if (supports_zapper)
{
vals->i0 = machine.root_device().ioport("ZAPPER2_T")->read();
vals->i1 = machine.root_device().ioport("ZAPPER2_X")->read();
vals->i2 = machine.root_device().ioport("ZAPPER2_Y")->read();
}
break;
case 0x04: /* arkanoid paddle */
if (pad_port == 1)
vals->i0 = (UINT8) ((UINT8) machine.root_device().ioport("PADDLE")->read() + (UINT8)0x52) ^ 0xff;
break;
case 0x06: /* crazy climber controller */
if (pad_port == 0)
{
state->m_in_0.i0 = machine.root_device().ioport(padnames[4])->read();
state->m_in_1.i0 = machine.root_device().ioport(padnames[5])->read();
}
break;
}
}
TIMER_CALLBACK_MEMBER(nes_state::lightgun_tick)
{
if ((m_io_ctrlsel->read() & 0x000f) == 0x0002)
{
/* enable lightpen crosshair */
crosshair_set_screen(machine(), 0, CROSSHAIR_SCREEN_ALL);
}
else
{
/* disable lightpen crosshair */
crosshair_set_screen(machine(), 0, CROSSHAIR_SCREEN_NONE);
}
if ((m_io_ctrlsel->read() & 0x00f0) == 0x0030)
{
/* enable lightpen crosshair */
crosshair_set_screen(machine(), 1, CROSSHAIR_SCREEN_ALL);
}
else
{
/* disable lightpen crosshair */
crosshair_set_screen(machine(), 1, CROSSHAIR_SCREEN_NONE);
}
}
WRITE8_MEMBER(nes_state::nes_IN0_w)
{
int cfg = m_io_ctrlsel->read();
/* Check if lightgun has been chosen as input: if so, enable crosshair */
machine().scheduler().timer_set(attotime::zero, timer_expired_delegate(FUNC(nes_state::lightgun_tick),this));
if ((cfg & 0x000f) >= 0x08) // for now we treat the FC keyboard separately from other inputs!
{
// here we should also have the tape output
if (BIT(data, 2)) // keyboard active
{
int lines = ((cfg & 0x000f) == 0x04) ? 9 : 12;
UINT8 out = BIT(data, 1); // scan
if (m_fck_mode && !out && ++m_fck_scan > lines)
m_fck_scan = 0;
m_fck_mode = out; // access lower or upper 4 bits
if (BIT(data, 0)) // reset
m_fck_scan = 0;
}
}
else
{
if (data & 0x01)
return;
if (LOG_JOY)
logerror("joy 0 bits read: %d\n", m_in_0.shift);
/* Toggling bit 0 high then low resets both controllers */
m_in_0.shift = 0;
m_in_1.shift = 0;
/* Read the input devices */
if ((cfg & 0x000f) != 0x06)
{
nes_read_input_device(machine(), cfg >> 0, &m_in_0, 0, TRUE);
nes_read_input_device(machine(), cfg >> 4, &m_in_1, 1, TRUE);
nes_read_input_device(machine(), cfg >> 8, &m_in_2, 2, FALSE);
nes_read_input_device(machine(), cfg >> 12, &m_in_3, 3, FALSE);
}
else // crazy climber pad
{
nes_read_input_device(machine(), 0, &m_in_1, 1, TRUE);
nes_read_input_device(machine(), 0, &m_in_2, 2, FALSE);
nes_read_input_device(machine(), 0, &m_in_3, 3, FALSE);
nes_read_input_device(machine(), cfg >> 0, &m_in_0, 0, TRUE);
}
if (cfg & 0x0f00)
m_in_0.i0 |= (m_in_2.i0 << 8) | (0x08 << 16);
if (cfg & 0xf000)
m_in_1.i0 |= (m_in_3.i0 << 8) | (0x04 << 16);
}
}
WRITE8_MEMBER(nes_state::nes_IN1_w)
{
}
struct nes_cart_lines
{
const char *tag;
int line;
};
static const struct nes_cart_lines nes_cart_lines_table[] =
{
{ "PRG A0", 0 },
{ "PRG A1", 1 },
{ "PRG A2", 2 },
{ "PRG A3", 3 },
{ "PRG A4", 4 },
{ "PRG A5", 5 },
{ "PRG A6", 6 },
{ "PRG A7", 7 },
{ "CHR A10", 10 },
{ "CHR A11", 11 },
{ "CHR A12", 12 },
{ "CHR A13", 13 },
{ "CHR A14", 14 },
{ "CHR A15", 15 },
{ "CHR A16", 16 },
{ "CHR A17", 17 },
{ "NC", 127 },
{ 0 }
};
static int nes_cart_get_line( const char *feature )
{
const struct nes_cart_lines *nes_line = &nes_cart_lines_table[0];
if (feature == NULL)
return 128;
while (nes_line->tag)
{
if (strcmp(nes_line->tag, feature) == 0)
break;
nes_line++;
}
return nes_line->line;
}
DEVICE_IMAGE_LOAD( nes_cart )
{
nes_state *state = image.device().machine().driver_data<nes_state>();
state->m_pcb_id = NO_BOARD; // initialization
if (image.software_entry() == NULL)
{
const char *mapinfo = NULL;
int mapint1 = 0, mapint2 = 0, mapint3 = 0, mapint4 = 0; //, goodcrcinfo = 0;
char magic[4], extend[5];
int local_options = 0;
char m;
/* Check first 4 bytes of the image to decide if it is UNIF or iNES */
/* Unfortunately, many .unf files have been released as .nes, so we cannot rely on extensions only */
memset(magic, '\0', sizeof(magic));
image.fread(magic, 4);
if ((magic[0] == 'N') && (magic[1] == 'E') && (magic[2] == 'S')) /* If header starts with 'NES' it is iNES */
{
UINT32 prg_size;
state->m_ines20 = 0;
state->m_battery_size = NES_BATTERY_SIZE; // with iNES we can only support 8K WRAM battery (iNES 2.0 might fix this)
state->m_prg_ram = 1; // always map state->m_wram in bank5 (eventually, this should be enabled only for some mappers)
// check if the image is recognized by nes.hsi
mapinfo = hashfile_extrainfo(image);
// image_extrainfo() resets the file position back to start.
// Let's skip past the magic header once again.
image.fseek(4, SEEK_SET);
image.fread(&state->m_prg_chunks, 1);
image.fread(&state->m_chr_chunks, 1);
/* Read the first ROM option byte (offset 6) */
image.fread(&m, 1);
/* Interpret the iNES header flags */
state->m_mapper = (m & 0xf0) >> 4;
local_options = m & 0x0f;
/* Read the second ROM option byte (offset 7) */
image.fread(&m, 1);
switch (m & 0xc)
{
case 0x4:
case 0xc:
// probably the header got corrupted: don't trust upper bits for mapper
break;
case 0x8: // it's iNES 2.0 format
state->m_ines20 = 1;
case 0x0:
default:
state->m_mapper = state->m_mapper | (m & 0xf0);
break;
}
if (mapinfo /* && !state->m_ines20 */)
{
if (4 == sscanf(mapinfo,"%d %d %d %d", &mapint1, &mapint2, &mapint3, &mapint4))
{
/* image is present in nes.hsi: overwrite the header settings with these */
state->m_mapper = mapint1;
local_options = mapint2 & 0x0f;
state->m_crc_hack = (mapint2 & 0xf0) >> 4; // this is used to differentiate among variants of the same Mapper (see below)
state->m_prg_chunks = mapint3;
state->m_chr_chunks = mapint4;
logerror("NES.HSI info: %d %d %d %d\n", mapint1, mapint2, mapint3, mapint4);
// mame_printf_error("NES.HSI info: %d %d %d %d\n", mapint1, mapint2, mapint3, mapint4);
// goodcrcinfo = 1;
state->m_ines20 = 0;
}
else
{
logerror("NES: [%s], Invalid mapinfo found\n", mapinfo);
}
}
else
{
logerror("NES: No extrainfo found\n");
}
state->m_hard_mirroring = (local_options & 0x01) ? PPU_MIRROR_VERT : PPU_MIRROR_HORZ;
// mame_printf_error("%s\n", state->m_hard_mirroring & 0x01 ? "Vertical" : "Horizontal");
state->m_battery = local_options & 0x02;
state->m_trainer = local_options & 0x04;
state->m_four_screen_vram = local_options & 0x08;
if (state->m_battery)
logerror("-- Battery found\n");
if (state->m_trainer)
logerror("-- Trainer found\n");
if (state->m_four_screen_vram)
logerror("-- 4-screen VRAM\n");
if (state->m_ines20)
{
logerror("Extended iNES format:\n");
image.fread(&extend, 5);
state->m_mapper |= (extend[0] & 0x0f) << 8;
logerror("-- mapper: %d\n", state->m_mapper);
logerror("-- submapper: %d\n", (extend[0] & 0xf0) >> 4);
state->m_prg_chunks |= ((extend[1] & 0x0f) << 8);
state->m_chr_chunks |= ((extend[1] & 0xf0) << 4);
logerror("-- PRG chunks: %d\n", state->m_prg_chunks);
logerror("-- CHR chunks: %d\n", state->m_chr_chunks);
logerror("-- PRG NVWRAM: %d\n", extend[2] & 0x0f);
logerror("-- PRG WRAM: %d\n", (extend[2] & 0xf0) >> 4);
logerror("-- CHR NVWRAM: %d\n", extend[3] & 0x0f);
logerror("-- CHR WRAM: %d\n", (extend[3] & 0xf0) >> 4);
logerror("-- TV System: %d\n", extend[4] & 3);
}
// Allocate class pointers for PRG/VROM/VRAM/WRAM
prg_size = (state->m_prg_chunks == 1) ? 2 * 0x4000 : state->m_prg_chunks * 0x4000;
state->m_prg = auto_alloc_array(image.device().machine(), UINT8, prg_size);
if (state->m_chr_chunks)
state->m_vrom = auto_alloc_array(image.device().machine(), UINT8, state->m_chr_chunks * 0x2000);
state->m_vram_chunks = 2;
state->m_vram = auto_alloc_array(image.device().machine(), UINT8, 0x4000);
// FIXME: this should only be allocated if there is actual wram in the cart (i.e. if state->m_prg_ram = 1)!
// or if there is a trainer, I think
state->m_wram_size = 0x10000;
state->m_wram = auto_alloc_array(image.device().machine(), UINT8, state->m_wram_size);
/* Setup PCB type (needed to add proper handlers later) */
state->m_pcb_id = nes_get_mmc_id(image.device().machine(), state->m_mapper);
// a few mappers correspond to multiple PCBs, so we need a few additional checks
switch (state->m_pcb_id)
{
case STD_CNROM:
if (state->m_mapper == 185)
{
switch (state->m_crc_hack)
{
case 0x0: // pin26: CE, pin27: CE (B-Wings, Bird Week)
state->m_ce_mask = 0x03;
state->m_ce_state = 0x03;
break;
case 0x4: // pin26: CE, pin27: /CE (Mighty Bomb Jack, Spy Vs. Spy)
state->m_ce_mask = 0x03;
state->m_ce_state = 0x01;
break;
case 0x8: // pin26: /CE, pin27: CE (Sansu 1, 2, 3 Nen)
state->m_ce_mask = 0x03;
state->m_ce_state = 0x02;
break;
case 0xc: // pin26: /CE, pin27: /CE (Seicross v2.0)
state->m_ce_mask = 0x03;
state->m_ce_state = 0x00;
break;
}
}
break;
case KONAMI_VRC2:
if (state->m_mapper == 22)
{
state->m_vrc_ls_prg_a = 0;
state->m_vrc_ls_prg_b = 1;
state->m_vrc_ls_chr = 1;
}
if (state->m_mapper == 23 && !state->m_crc_hack)
{
state->m_vrc_ls_prg_a = 1;
state->m_vrc_ls_prg_b = 0;
state->m_vrc_ls_chr = 0;
}
if (state->m_mapper == 23 && state->m_crc_hack)
{
// here there are also Akumajou Special, Crisis Force, Parodius da!, Tiny Toons which are VRC-4
state->m_vrc_ls_prg_a = 3;
state->m_vrc_ls_prg_b = 2;
state->m_pcb_id = KONAMI_VRC4; // this allows for konami_irq to be installed at reset
}
break;
case KONAMI_VRC4:
if (state->m_mapper == 21)
{
// Wai Wai World 2 & Ganbare Goemon Gaiden 2 (the latter with crc_hack)
state->m_vrc_ls_prg_a = state->m_crc_hack ? 7 : 2;
state->m_vrc_ls_prg_b = state->m_crc_hack ? 6 : 1;
}
if (state->m_mapper == 25) // here there is also Ganbare Goemon Gaiden which is VRC-2
{
state->m_vrc_ls_prg_a = state->m_crc_hack ? 2 : 0;
state->m_vrc_ls_prg_b = state->m_crc_hack ? 3 : 1;
}
break;
case KONAMI_VRC6:
if (state->m_mapper == 24)
{
state->m_vrc_ls_prg_a = 1;
state->m_vrc_ls_prg_b = 0;
}
if (state->m_mapper == 26)
{
state->m_vrc_ls_prg_a = 0;
state->m_vrc_ls_prg_b = 1;
}
break;
case IREM_G101:
if (state->m_crc_hack)
state->m_hard_mirroring = PPU_MIRROR_HIGH; // Major League has hardwired mirroring
break;
case DIS_74X161X161X32:
if (state->m_mapper == 70)
state->m_hard_mirroring = PPU_MIRROR_VERT; // only hardwired mirroring makes different mappers 70 & 152
break;
case SUNSOFT_2:
if (state->m_mapper == 93)
state->m_hard_mirroring = PPU_MIRROR_VERT; // only hardwired mirroring makes different mappers 89 & 93
break;
case STD_BXROM:
if (state->m_crc_hack)
state->m_pcb_id = AVE_NINA01; // Mapper 34 is used for 2 diff boards
break;
case BANDAI_LZ93:
if (state->m_crc_hack)
state->m_pcb_id = BANDAI_JUMP2; // Mapper 153 is used for 2 diff boards
break;
case IREM_HOLYDIV:
if (state->m_crc_hack)
state->m_pcb_id = JALECO_JF16; // Mapper 78 is used for 2 diff boards
break;
case CAMERICA_BF9093:
if (state->m_crc_hack)
state->m_pcb_id = CAMERICA_BF9097; // Mapper 71 is used for 2 diff boards
break;
case HES_BOARD:
if (state->m_crc_hack)
state->m_pcb_id = HES6IN1_BOARD; // Mapper 113 is used for 2 diff boards
break;
case WAIXING_ZS:
if (state->m_crc_hack)
state->m_pcb_id = WAIXING_DQ8; // Mapper 242 is used for 2 diff boards
break;
case BMC_GOLD_7IN1:
if (state->m_crc_hack)
state->m_pcb_id = BMC_MARIOPARTY_7IN1; // Mapper 52 is used for 2 diff boards
break;
//FIXME: we also have to fix Action 52 PRG loading somewhere...
}
/* Allocate internal Mapper RAM for boards which require it */
if (state->m_pcb_id == STD_EXROM)
state->m_mapper_ram = auto_alloc_array(image.device().machine(), UINT8, 0x400);
if (state->m_pcb_id == TAITO_X1_005 || state->m_pcb_id == TAITO_X1_005_A)
state->m_mapper_bram = auto_alloc_array(image.device().machine(), UINT8, 0x80);
if (state->m_pcb_id == TAITO_X1_017)
state->m_mapper_bram = auto_alloc_array(image.device().machine(), UINT8, 0x1400);
if (state->m_pcb_id == NAMCOT_163)
state->m_mapper_ram = auto_alloc_array(image.device().machine(), UINT8, 0x2000);
if (state->m_pcb_id == FUKUTAKE_BOARD)
state->m_mapper_ram = auto_alloc_array(image.device().machine(), UINT8, 2816);
/* Position past the header */
image.fseek(16, SEEK_SET);
/* Load the 0x200 byte trainer at 0x7000 if it exists */
if (state->m_trainer)
image.fread(&state->m_wram[0x1000], 0x200);
/* Read in the program chunks */
image.fread(&state->m_prg[0], 0x4000 * state->m_prg_chunks);
if (state->m_prg_chunks == 1)
memcpy(&state->m_prg[0x4000], &state->m_prg[0], 0x4000);
#if SPLIT_PRG
{
FILE *prgout;
char outname[255];
sprintf(outname, "%s.prg", image.filename());
prgout = fopen(outname, "wb");
if (prgout)
{
fwrite(&state->m_prg[0], 1, 0x4000 * state->m_prg_chunks, prgout);
mame_printf_error("Created PRG chunk\n");
}
fclose(prgout);
}
#endif
logerror("**\n");
logerror("Mapper: %d\n", state->m_mapper);
logerror("PRG chunks: %02x, size: %06x\n", state->m_prg_chunks, 0x4000 * state->m_prg_chunks);
// mame_printf_error("Mapper: %d\n", state->m_mapper);
// mame_printf_error("PRG chunks: %02x, size: %06x\n", state->m_prg_chunks, 0x4000 * state->m_prg_chunks);
/* Read in any chr chunks */
if (state->m_chr_chunks > 0)
{
image.fread(state->m_vrom, state->m_chr_chunks * 0x2000);
if (state->m_mapper == 2)
logerror("Warning: VROM has been found in VRAM-based mapper. Either the mapper is set wrong or the ROM image is incorrect.\n");
}
#if SPLIT_CHR
if (state->m_chr_chunks > 0)
{
FILE *chrout;
char outname[255];
sprintf(outname, "%s.chr", image.filename());
chrout= fopen(outname, "wb");
if (chrout)
{
fwrite(state->m_vrom, 1, 0x2000 * state->m_chr_chunks, chrout);
mame_printf_error("Created CHR chunk\n");
}
fclose(chrout);
}
#endif
logerror("CHR chunks: %02x, size: %06x\n", state->m_chr_chunks, 0x2000 * state->m_chr_chunks);
logerror("**\n");
// mame_printf_error("CHR chunks: %02x, size: %06x\n", state->m_chr_chunks, 0x2000 * state->m_chr_chunks);
// mame_printf_error("**\n");
}
else if ((magic[0] == 'U') && (magic[1] == 'N') && (magic[2] == 'I') && (magic[3] == 'F')) /* If header starts with 'UNIF' it is UNIF */
{
UINT32 unif_ver = 0;
char magic2[4];
UINT8 buffer[4];
UINT32 chunk_length = 0, read_length = 0x20;
UINT32 prg_start = 0, chr_start = 0, prg_size;
char unif_mapr[32]; // here we should store MAPR chunks
UINT32 size = image.length();
int mapr_chunk_found = 0;
// allocate space to temporarily store PRG & CHR banks
UINT8 *temp_prg = auto_alloc_array(image.device().machine(), UINT8, 256 * 0x4000);
UINT8 *temp_chr = auto_alloc_array(image.device().machine(), UINT8, 256 * 0x2000);
UINT8 temp_byte = 0;
/* init prg/chr chunks to 0: the exact number of chunks will be determined while reading the file */
state->m_prg_chunks = 0;
state->m_chr_chunks = 0;
image.fread(&buffer, 4);
unif_ver = buffer[0] | (buffer[1] << 8) | (buffer[2] << 16) | (buffer[3] << 24);
logerror("UNIF file found, version %d\n", unif_ver);
if (size <= 0x20)
{
logerror("%s only contains the UNIF header and no data.\n", image.filename());
return IMAGE_INIT_FAIL;
}
do
{
image.fseek(read_length, SEEK_SET);
memset(magic2, '\0', sizeof(magic2));
image.fread(&magic2, 4);
/* We first run through the whole image to find a [MAPR] chunk. This is needed
because, unfortunately, the MAPR chunk is not always the first chunk (see
Super 24-in-1). When such a chunk is found, we set mapr_chunk_found=1 and
we go back to load other chunks! */
if (!mapr_chunk_found)
{
if ((magic2[0] == 'M') && (magic2[1] == 'A') && (magic2[2] == 'P') && (magic2[3] == 'R'))
{
mapr_chunk_found = 1;
logerror("[MAPR] chunk found: ");
image.fread(&buffer, 4);
chunk_length = buffer[0] | (buffer[1] << 8) | (buffer[2] << 16) | (buffer[3] << 24);
if (chunk_length <= 0x20)
image.fread(&unif_mapr, chunk_length);
// find out prg/chr size, battery, wram, etc.
unif_mapr_setup(image.device().machine(), unif_mapr);
/* now that we found the MAPR chunk, we can go back to load other chunks */
image.fseek(0x20, SEEK_SET);
read_length = 0x20;
}
else
{
logerror("Skip this chunk. We need a [MAPR] chunk before anything else.\n");
image.fread(&buffer, 4);
chunk_length = buffer[0] | (buffer[1] << 8) | (buffer[2] << 16) | (buffer[3] << 24);
read_length += (chunk_length + 8);
}
}
else
{
/* What kind of chunk do we have here? */
if ((magic2[0] == 'M') && (magic2[1] == 'A') && (magic2[2] == 'P') && (magic2[3] == 'R'))
{
/* The [MAPR] chunk has already been read, so we skip it */
/* TO DO: it would be nice to check if more than one MAPR chunk is present */
logerror("[MAPR] chunk found (in the 2nd run). Already loaded.\n");
image.fread(&buffer, 4);
chunk_length = buffer[0] | (buffer[1] << 8) | (buffer[2] << 16) | (buffer[3] << 24);
read_length += (chunk_length + 8);
}
else if ((magic2[0] == 'R') && (magic2[1] == 'E') && (magic2[2] == 'A') && (magic2[3] == 'D'))
{
logerror("[READ] chunk found. No support yet.\n");
image.fread(&buffer, 4);
chunk_length = buffer[0] | (buffer[1] << 8) | (buffer[2] << 16) | (buffer[3] << 24);
read_length += (chunk_length + 8);
}
else if ((magic2[0] == 'N') && (magic2[1] == 'A') && (magic2[2] == 'M') && (magic2[3] == 'E'))
{
logerror("[NAME] chunk found. No support yet.\n");
image.fread(&buffer, 4);
chunk_length = buffer[0] | (buffer[1] << 8) | (buffer[2] << 16) | (buffer[3] << 24);
read_length += (chunk_length + 8);
}
else if ((magic2[0] == 'W') && (magic2[1] == 'R') && (magic2[2] == 'T') && (magic2[3] == 'R'))
{
logerror("[WRTR] chunk found. No support yet.\n");
image.fread(&buffer, 4);
chunk_length = buffer[0] | (buffer[1] << 8) | (buffer[2] << 16) | (buffer[3] << 24);
read_length += (chunk_length + 8);
}
else if ((magic2[0] == 'T') && (magic2[1] == 'V') && (magic2[2] == 'C') && (magic2[3] == 'I'))
{
logerror("[TVCI] chunk found.\n");
image.fread(&buffer, 4);
chunk_length = buffer[0] | (buffer[1] << 8) | (buffer[2] << 16) | (buffer[3] << 24);
image.fread(&temp_byte, 1);
logerror("Television Standard : %s\n", (temp_byte == 0) ? "NTSC" : (temp_byte == 1) ? "PAL" : "Does not matter");
read_length += (chunk_length + 8);
}
else if ((magic2[0] == 'T') && (magic2[1] == 'V') && (magic2[2] == 'S') && (magic2[3] == 'C')) // is this the same as TVCI??
{
logerror("[TVSC] chunk found. No support yet.\n");
image.fread(&buffer, 4);
chunk_length = buffer[0] | (buffer[1] << 8) | (buffer[2] << 16) | (buffer[3] << 24);
read_length += (chunk_length + 8);
}
else if ((magic2[0] == 'D') && (magic2[1] == 'I') && (magic2[2] == 'N') && (magic2[3] == 'F'))
{
logerror("[DINF] chunk found. No support yet.\n");
image.fread(&buffer, 4);
chunk_length = buffer[0] | (buffer[1] << 8) | (buffer[2] << 16) | (buffer[3] << 24);
read_length += (chunk_length + 8);
}
else if ((magic2[0] == 'C') && (magic2[1] == 'T') && (magic2[2] == 'R') && (magic2[3] == 'L'))
{
logerror("[CTRL] chunk found. No support yet.\n");
image.fread(&buffer, 4);
chunk_length = buffer[0] | (buffer[1] << 8) | (buffer[2] << 16) | (buffer[3] << 24);
read_length += (chunk_length + 8);
}
else if ((magic2[0] == 'B') && (magic2[1] == 'A') && (magic2[2] == 'T') && (magic2[3] == 'R'))
{
logerror("[BATR] chunk found. No support yet.\n");
image.fread(&buffer, 4);
chunk_length = buffer[0] | (buffer[1] << 8) | (buffer[2] << 16) | (buffer[3] << 24);
read_length += (chunk_length + 8);
}
else if ((magic2[0] == 'V') && (magic2[1] == 'R') && (magic2[2] == 'O') && (magic2[3] == 'R'))
{
logerror("[VROR] chunk found. No support yet.\n");
image.fread(&buffer, 4);
chunk_length = buffer[0] | (buffer[1] << 8) | (buffer[2] << 16) | (buffer[3] << 24);
read_length += (chunk_length + 8);
}
else if ((magic2[0] == 'M') && (magic2[1] == 'I') && (magic2[2] == 'R') && (magic2[3] == 'R'))
{
logerror("[MIRR] chunk found.\n");
image.fread(&buffer, 4);
chunk_length = buffer[0] | (buffer[1] << 8) | (buffer[2] << 16) | (buffer[3] << 24);
image.fread(&temp_byte, 1);
switch (temp_byte)
{
case 0: // Horizontal Mirroring (Hard Wired)
state->m_hard_mirroring = PPU_MIRROR_HORZ;
break;
case 1: // Vertical Mirroring (Hard Wired)
state->m_hard_mirroring = PPU_MIRROR_VERT;
break;
case 2: // Mirror All Pages From $2000 (Hard Wired)
state->m_hard_mirroring = PPU_MIRROR_LOW;
break;
case 3: // Mirror All Pages From $2400 (Hard Wired)
state->m_hard_mirroring = PPU_MIRROR_HIGH;
break;
case 4: // Four Screens of VRAM (Hard Wired)
state->m_four_screen_vram = 1;
break;
case 5: // Mirroring Controlled By Mapper Hardware
logerror("Mirroring handled by the board hardware.\n");
// default to horizontal at start
state->m_hard_mirroring = PPU_MIRROR_HORZ;
break;
default:
logerror("Undocumented mirroring value.\n");
// default to horizontal
state->m_hard_mirroring = PPU_MIRROR_HORZ;
break;
}
read_length += (chunk_length + 8);
}
else if ((magic2[0] == 'P') && (magic2[1] == 'C') && (magic2[2] == 'K'))
{
logerror("[PCK%c] chunk found. No support yet.\n", magic2[3]);
image.fread(&buffer, 4);
chunk_length = buffer[0] | (buffer[1] << 8) | (buffer[2] << 16) | (buffer[3] << 24);
read_length += (chunk_length + 8);
}
else if ((magic2[0] == 'C') && (magic2[1] == 'C') && (magic2[2] == 'K'))
{
logerror("[CCK%c] chunk found. No support yet.\n", magic2[3]);
image.fread(&buffer, 4);
chunk_length = buffer[0] | (buffer[1] << 8) | (buffer[2] << 16) | (buffer[3] << 24);
read_length += (chunk_length + 8);
}
else if ((magic2[0] == 'P') && (magic2[1] == 'R') && (magic2[2] == 'G'))
{
logerror("[PRG%c] chunk found. ", magic2[3]);
image.fread(&buffer, 4);
chunk_length = buffer[0] | (buffer[1] << 8) | (buffer[2] << 16) | (buffer[3] << 24);
// FIXME: we currently don't support PRG chunks smaller than 16K!
state->m_prg_chunks += (chunk_length / 0x4000);
if (chunk_length / 0x4000)
logerror("It consists of %d 16K-blocks.\n", chunk_length / 0x4000);
else
logerror("This chunk is smaller than 16K: the emulation might have issues. Please report this file to the MESS forums.\n");
/* Read in the program chunks */
image.fread(&temp_prg[prg_start], chunk_length);
prg_start += chunk_length;
read_length += (chunk_length + 8);
}
else if ((magic2[0] == 'C') && (magic2[1] == 'H') && (magic2[2] == 'R'))
{
logerror("[CHR%c] chunk found. ", magic2[3]);
image.fread(&buffer, 4);
chunk_length = buffer[0] | (buffer[1] << 8) | (buffer[2] << 16) | (buffer[3] << 24);
state->m_chr_chunks += (chunk_length / 0x2000);
logerror("It consists of %d 8K-blocks.\n", chunk_length / 0x2000);
/* Read in the vrom chunks */
image.fread(&temp_chr[chr_start], chunk_length);
chr_start += chunk_length;
read_length += (chunk_length + 8);
}
else
{
logerror("Unsupported UNIF chunk or corrupted header. Please report the problem at MESS Board.\n");
read_length = size;
}
}
} while (size > read_length);
if (!mapr_chunk_found)
{
auto_free(image.device().machine(), temp_prg);
auto_free(image.device().machine(), temp_chr);
fatalerror("UNIF should have a [MAPR] chunk to work. Check if your image has been corrupted\n");
}
if (!prg_start)
{
auto_free(image.device().machine(), temp_prg);
auto_free(image.device().machine(), temp_chr);
fatalerror("Unsupported UNIF chunk or corrupted header. Please report the problem at MESS Board.\n");
}
// Allocate class pointers for PRG/VROM/VRAM/WRAM and copy data there from the temp copies
/* Take care of PRG */
prg_size = (state->m_prg_chunks == 1) ? 2 * 0x4000 : state->m_prg_chunks * 0x4000;
state->m_prg = auto_alloc_array(image.device().machine(), UINT8, prg_size);
memcpy(&state->m_prg[0], &temp_prg[0], state->m_prg_chunks * 0x4000);
/* If only a single 16K PRG chunk is present, mirror it! */
if (state->m_prg_chunks == 1)
memcpy(&state->m_prg[0x4000], &state->m_prg[0], 0x4000);
/* Take care of CHR ROM */
if (state->m_chr_chunks)
{
state->m_vrom = auto_alloc_array(image.device().machine(), UINT8, state->m_chr_chunks * 0x2000);
memcpy(&state->m_vrom[0x00000], &temp_chr[0x00000], state->m_chr_chunks * 0x2000);
}
/* Take care of CHR RAM */
if (state->m_vram_chunks)
state->m_vram = auto_alloc_array(image.device().machine(), UINT8, state->m_vram_chunks * 0x2000);
// FIXME: this should only be allocated if there is actual wram in the cart (i.e. if state->m_prg_ram = 1)!
state->m_wram_size = 0x10000;
state->m_wram = auto_alloc_array(image.device().machine(), UINT8, state->m_wram_size);
#if SPLIT_PRG
{
FILE *prgout;
char outname[255];
sprintf(outname, "%s.prg", image.filename());
prgout = fopen(outname, "wb");
if (prgout)
{
fwrite(&state->m_prg[0], 1, 0x4000 * state->m_prg_chunks, prgout);
mame_printf_error("Created PRG chunk\n");
}
fclose(prgout);
}
#endif
#if SPLIT_CHR
if (state->m_chr_chunks > 0)
{
FILE *chrout;
char outname[255];
sprintf(outname, "%s.chr", image.filename());
chrout= fopen(outname, "wb");
if (chrout)
{
fwrite(state->m_vrom, 1, 0x2000 * state->m_chr_chunks, chrout);
mame_printf_error("Created CHR chunk\n");
}
fclose(chrout);
}
#endif
// free the temporary copy of PRG/CHR
auto_free(image.device().machine(), temp_prg);
auto_free(image.device().machine(), temp_chr);
logerror("UNIF support is only very preliminary.\n");
}
else
{
logerror("%s is NOT a file in either iNES or UNIF format.\n", image.filename());
return IMAGE_INIT_FAIL;
}
}
else
{
UINT32 prg_size = image.get_software_region_length("prg");
UINT32 chr_size = image.get_software_region_length("chr");
UINT32 vram_size = image.get_software_region_length("vram");
vram_size += image.get_software_region_length("vram2");
// validate the xml fields
if (!prg_size)
fatalerror("No PRG entry for this software! Please check if the xml list got corrupted\n");
if (prg_size < 0x8000)
fatalerror("PRG entry is too small! Please check if the xml list got corrupted\n");
// Allocate class pointers for PRG/VROM/VRAM/WRAM and copy data there from the temp copies
state->m_prg = auto_alloc_array(image.device().machine(), UINT8, prg_size);
if (chr_size)
state->m_vrom = auto_alloc_array(image.device().machine(), UINT8, chr_size);
if (vram_size)
state->m_vram = auto_alloc_array(image.device().machine(), UINT8, vram_size);
memcpy(state->m_prg, image.get_software_region("prg"), prg_size);
if (chr_size)
memcpy(state->m_vrom, image.get_software_region("chr"), chr_size);
state->m_prg_chunks = prg_size / 0x4000;
state->m_chr_chunks = chr_size / 0x2000;
state->m_vram_chunks = vram_size / 0x2000;
state->m_pcb_id = nes_get_pcb_id(image.device().machine(), image.get_feature("pcb"));
if (state->m_pcb_id == STD_TVROM || state->m_pcb_id == STD_DRROM || state->m_pcb_id == IREM_LROG017)
state->m_four_screen_vram = 1;
else
state->m_four_screen_vram = 0;
state->m_battery = (image.get_software_region("bwram") != NULL) ? 1 : 0;
state->m_battery_size = image.get_software_region_length("bwram");
if (state->m_pcb_id == BANDAI_LZ93EX)
{
// allocate the 24C01 or 24C02 EEPROM
state->m_battery = 1;
state->m_battery_size += 0x2000;
}
if (state->m_pcb_id == BANDAI_DATACH)
{
// allocate the 24C01 and 24C02 EEPROM
state->m_battery = 1;
state->m_battery_size += 0x4000;
}
state->m_prg_ram = (image.get_software_region("wram") != NULL) ? 1 : 0;
state->m_wram_size = image.get_software_region_length("wram");
state->m_mapper_ram_size = image.get_software_region_length("mapper_ram");
state->m_mapper_bram_size = image.get_software_region_length("mapper_bram");
if (state->m_prg_ram)
state->m_wram = auto_alloc_array(image.device().machine(), UINT8, state->m_wram_size);
if (state->m_mapper_ram_size)
state->m_mapper_ram = auto_alloc_array(image.device().machine(), UINT8, state->m_mapper_ram_size);
if (state->m_mapper_bram_size)
state->m_mapper_bram = auto_alloc_array(image.device().machine(), UINT8, state->m_mapper_bram_size);
/* Check for mirroring */
if (image.get_feature("mirroring") != NULL)
{
const char *mirroring = image.get_feature("mirroring");
if (!strcmp(mirroring, "horizontal"))
state->m_hard_mirroring = PPU_MIRROR_HORZ;
if (!strcmp(mirroring, "vertical"))
state->m_hard_mirroring = PPU_MIRROR_VERT;
if (!strcmp(mirroring, "high"))
state->m_hard_mirroring = PPU_MIRROR_HIGH;
if (!strcmp(mirroring, "low"))
state->m_hard_mirroring = PPU_MIRROR_LOW;
}
state->m_chr_open_bus = 0;
state->m_ce_mask = 0;
state->m_ce_state = 0;
state->m_vrc_ls_prg_a = 0;
state->m_vrc_ls_prg_b = 0;
state->m_vrc_ls_chr = 0;
/* Check for pins in specific boards which require them */
if (state->m_pcb_id == STD_CNROM)
{
if (image.get_feature("chr-pin26") != NULL)
{
state->m_ce_mask |= 0x01;
state->m_ce_state |= !strcmp(image.get_feature("chr-pin26"), "CE") ? 0x01 : 0;
}
if (image.get_feature("chr-pin27") != NULL)
{
state->m_ce_mask |= 0x02;
state->m_ce_state |= !strcmp(image.get_feature("chr-pin27"), "CE") ? 0x02 : 0;
}
}
if (state->m_pcb_id == TAITO_X1_005 && image.get_feature("x1-pin17") != NULL && image.get_feature("x1-pin31") != NULL)
{
if (!strcmp(image.get_feature("x1-pin17"), "CIRAM A10") && !strcmp(image.get_feature("x1-pin31"), "NC"))
state->m_pcb_id = TAITO_X1_005_A;
}
if (state->m_pcb_id == KONAMI_VRC2)
{
state->m_vrc_ls_prg_a = nes_cart_get_line(image.get_feature("vrc2-pin3"));
state->m_vrc_ls_prg_b = nes_cart_get_line(image.get_feature("vrc2-pin4"));
state->m_vrc_ls_chr = (nes_cart_get_line(image.get_feature("vrc2-pin21")) != 10) ? 1 : 0;
// mame_printf_error("VRC-2, pin3: A%d, pin4: A%d, pin21: %s\n", state->m_vrc_ls_prg_a, state->m_vrc_ls_prg_b, state->m_vrc_ls_chr ? "NC" : "A10");
}
if (state->m_pcb_id == KONAMI_VRC4)
{
state->m_vrc_ls_prg_a = nes_cart_get_line(image.get_feature("vrc4-pin3"));
state->m_vrc_ls_prg_b = nes_cart_get_line(image.get_feature("vrc4-pin4"));
// mame_printf_error("VRC-4, pin3: A%d, pin4: A%d\n", state->m_vrc_ls_prg_a, state->m_vrc_ls_prg_b);
}
if (state->m_pcb_id == KONAMI_VRC6)
{
state->m_vrc_ls_prg_a = nes_cart_get_line(image.get_feature("vrc6-pin9"));
state->m_vrc_ls_prg_b = nes_cart_get_line(image.get_feature("vrc6-pin10"));
// mame_printf_error("VRC-6, pin9: A%d, pin10: A%d\n", state->m_vrc_ls_prg_a, state->m_vrc_ls_prg_b);
}
/* Check for other misc board variants */
if (state->m_pcb_id == STD_SOROM)
{
if (image.get_feature("mmc1_type") != NULL && !strcmp(image.get_feature("mmc1_type"), "MMC1A"))
state->m_pcb_id = STD_SOROM_A; // in MMC1-A PRG RAM is always enabled
}
if (state->m_pcb_id == STD_SXROM)
{
if (image.get_feature("mmc1_type") != NULL && !strcmp(image.get_feature("mmc1_type"), "MMC1A"))
state->m_pcb_id = STD_SXROM_A; // in MMC1-A PRG RAM is always enabled
}
if (state->m_pcb_id == STD_NXROM || state->m_pcb_id == SUNSOFT_DCS)
{
if (image.get_software_region("minicart") != NULL) // check for dual minicart
{
state->m_pcb_id = SUNSOFT_DCS;
// we shall load somewhere the minicart, but we still do not support this
}
}
#if 0
if (state->m_pcb_id == UNSUPPORTED_BOARD)
mame_printf_error("This board (%s) is currently not supported by MESS\n", image.get_feature("pcb"));
mame_printf_error("PCB Feature: %s\n", image.get_feature("pcb"));
mame_printf_error("PRG chunks: %d\n", state->m_prg_chunks);
mame_printf_error("CHR chunks: %d\n", state->m_chr_chunks);
mame_printf_error("VRAM: Present %s, size: %d\n", state->m_vram_chunks ? "Yes" : "No", vram_size);
mame_printf_error("NVWRAM: Present %s, size: %d\n", state->m_battery ? "Yes" : "No", state->m_battery_size);
mame_printf_error("WRAM: Present %s, size: %d\n", state->m_prg_ram ? "Yes" : "No", state->m_wram_size);
#endif
}
// Attempt to load a battery file for this ROM
// A few boards have internal RAM with a battery (MMC6, Taito X1-005 & X1-017, etc.)
if (state->m_battery || state->m_mapper_bram_size)
{
UINT8 *temp_nvram = auto_alloc_array(image.device().machine(), UINT8, state->m_battery_size + state->m_mapper_bram_size);
image.battery_load(temp_nvram, state->m_battery_size + state->m_mapper_bram_size, 0x00);
if (state->m_battery)
{
state->m_battery_ram = auto_alloc_array(image.device().machine(), UINT8, state->m_battery_size);
memcpy(state->m_battery_ram, temp_nvram, state->m_battery_size);
}
if (state->m_mapper_bram_size)
memcpy(state->m_mapper_bram, temp_nvram + state->m_battery_size, state->m_mapper_bram_size);
auto_free(image.device().machine(), temp_nvram);
}
return IMAGE_INIT_PASS;
}
void nes_partialhash(hash_collection &dest, const unsigned char *data,
unsigned long length, const char *functions)
{
if (length <= 16)
return;
dest.compute(&data[16], length - 16, functions);
}
/**************************
Disk System emulation
**************************/
static void fds_irq( device_t *device, int scanline, int vblank, int blanked )
{
nes_state *state = device->machine().driver_data<nes_state>();
if (state->m_IRQ_enable_latch)
state->m_maincpu->set_input_line(M6502_IRQ_LINE, HOLD_LINE);
if (state->m_IRQ_enable)
{
if (state->m_IRQ_count <= 114)
{
state->m_maincpu->set_input_line(M6502_IRQ_LINE, HOLD_LINE);
state->m_IRQ_enable = 0;
state->m_fds_status0 |= 0x01;
}
else
state->m_IRQ_count -= 114;
}
}
READ8_MEMBER(nes_state::nes_fds_r)
{
UINT8 ret = 0x00;
switch (offset)
{
case 0x00: /* $4030 - disk status 0 */
ret = m_fds_status0;
/* clear the disk IRQ detect flag */
m_fds_status0 &= ~0x01;
break;
case 0x01: /* $4031 - data latch */
/* don't read data if disk is unloaded */
if (m_fds_data == NULL)
ret = 0;
else if (m_fds_current_side)
{
// a bunch of games (e.g. bshashsc and fairypin) keep reading beyond the last track
// what is the expected behavior?
if (m_fds_head_position > 65500)
m_fds_head_position = 0;
ret = m_fds_data[(m_fds_current_side - 1) * 65500 + m_fds_head_position++];
}
else
ret = 0;
break;
case 0x02: /* $4032 - disk status 1 */
/* return "no disk" status if disk is unloaded */
if (m_fds_data == NULL)
ret = 1;
else if (m_fds_last_side != m_fds_current_side)
{
/* If we've switched disks, report "no disk" for a few reads */
ret = 1;
m_fds_count++;
if (m_fds_count == 50)
{
m_fds_last_side = m_fds_current_side;
m_fds_count = 0;
}
}
else
ret = (m_fds_current_side == 0); /* 0 if a disk is inserted */
break;
case 0x03: /* $4033 */
ret = 0x80;
break;
default:
ret = 0x00;
break;
}
return ret;
}
WRITE8_MEMBER(nes_state::nes_fds_w)
{
switch (offset)
{
case 0x00:
m_IRQ_count_latch = (m_IRQ_count_latch & 0xff00) | data;
break;
case 0x01:
m_IRQ_count_latch = (m_IRQ_count_latch & 0x00ff) | (data << 8);
break;
case 0x02:
m_IRQ_count = m_IRQ_count_latch;
m_IRQ_enable = data;
break;
case 0x03:
// d0 = sound io (1 = enable)
// d1 = disk io (1 = enable)
break;
case 0x04:
/* write data out to disk */
break;
case 0x05:
m_fds_motor_on = BIT(data, 0);
if (BIT(data, 1))
m_fds_head_position = 0;
m_fds_read_mode = BIT(data, 2);
set_nt_mirroring(BIT(data, 3) ? PPU_MIRROR_HORZ : PPU_MIRROR_VERT);
if ((!(data & 0x40)) && (m_fds_write_reg & 0x40))
m_fds_head_position -= 2; // ???
m_IRQ_enable_latch = BIT(data, 7);
m_fds_write_reg = data;
break;
}
}
static void nes_load_proc( device_image_interface &image )
{
nes_state *state = image.device().machine().driver_data<nes_state>();
int header = 0;
state->m_fds_sides = 0;
if (image.length() % 65500)
header = 0x10;
state->m_fds_sides = (image.length() - header) / 65500;
if (state->m_fds_data == NULL)
state->m_fds_data = auto_alloc_array(image.device().machine(),UINT8,state->m_fds_sides * 65500); // I don't think we can arrive here ever, probably it can be removed...
/* if there is an header, skip it */
image.fseek(header, SEEK_SET);
image.fread(state->m_fds_data, 65500 * state->m_fds_sides);
return;
}
static void nes_unload_proc( device_image_interface &image )
{
nes_state *state = image.device().machine().driver_data<nes_state>();
/* TODO: should write out changes here as well */
state->m_fds_sides = 0;
}
DRIVER_INIT_MEMBER(nes_state,famicom)
{
/* clear some of the variables we don't use */
m_trainer = 0;
m_battery = 0;
m_prg_ram = 0;
m_four_screen_vram = 0;
m_hard_mirroring = 0;
m_prg_chunks = m_chr_chunks = 0;
/* initialize the disk system */
m_disk_expansion = 1;
m_pcb_id = NO_BOARD;
m_fds_sides = 0;
m_fds_last_side = 0;
m_fds_count = 0;
m_fds_motor_on = 0;
m_fds_door_closed = 0;
m_fds_current_side = 1;
m_fds_head_position = 0;
m_fds_status0 = 0;
m_fds_read_mode = m_fds_write_reg = 0;
m_fds_data = auto_alloc_array_clear(machine(), UINT8, 65500 * 2);
m_fds_ram = auto_alloc_array_clear(machine(), UINT8, 0x8000);
save_pointer(NAME(m_fds_ram), 0x8000);
floppy_install_load_proc(floppy_get_device(machine(), 0), nes_load_proc);
floppy_install_unload_proc(floppy_get_device(machine(), 0), nes_unload_proc);
}
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