#include "emu.h" #include "ascii.h" const device_type MSX_CART_ASCII8 = &device_creator; const device_type MSX_CART_ASCII16 = &device_creator; const device_type MSX_CART_ASCII8_SRAM = &device_creator; const device_type MSX_CART_ASCII16_SRAM = &device_creator; msx_cart_ascii8::msx_cart_ascii8(const machine_config &mconfig, const char *tag, device_t *owner, UINT32 clock) : device_t(mconfig, MSX_CART_ASCII8, "MSX Cartridge - ASCII8", tag, owner, clock, "msx_cart_ascii8", __FILE__) , msx_cart_interface(mconfig, *this) , m_bank_mask(0) { for (int i = 0; i < 4; i++) { m_selected_bank[i] = 0; m_bank_base[i] = NULL; } } void msx_cart_ascii8::device_start() { save_item(NAME(m_selected_bank)); machine().save().register_postload(save_prepost_delegate(FUNC(msx_cart_ascii8::restore_banks), this)); } void msx_cart_ascii8::restore_banks() { for (int i = 0; i < 4; i++) { m_bank_base[i] = get_rom_base() + (m_selected_bank[i] & m_bank_mask ) * 0x2000; } } void msx_cart_ascii8::device_reset() { for (int i = 0; i < 4; i++) { m_selected_bank[i] = 0; } } void msx_cart_ascii8::initialize_cartridge() { UINT32 size = get_rom_size(); if ( size > 256 * 0x2000 ) { fatalerror("ascii8: ROM is too big\n"); } UINT16 banks = size / 0x2000; if (size != banks * 0x2000 || (~(banks - 1) % banks)) { fatalerror("ascii8: Invalid ROM size\n"); } m_bank_mask = banks - 1; restore_banks(); } READ8_MEMBER(msx_cart_ascii8::read_cart) { if ( offset >= 0x4000 && offset < 0xC000 ) { return m_bank_base[(offset - 0x4000) >> 13][offset & 0x1fff]; } return 0xff; } WRITE8_MEMBER(msx_cart_ascii8::write_cart) { if (offset >= 0x6000 && offset < 0x8000) { UINT8 bank = (offset / 0x800) & 0x03; m_selected_bank[bank] = data; m_bank_base[bank] = get_rom_base() + (m_selected_bank[bank] & m_bank_mask ) * 0x2000; } } msx_cart_ascii16::msx_cart_ascii16(const machine_config &mconfig, const char *tag, device_t *owner, UINT32 clock) : device_t(mconfig, MSX_CART_ASCII16, "MSX Cartridge - ASCII16", tag, owner, clock, "msx_cart_ascii16", __FILE__) , msx_cart_interface(mconfig, *this) , m_bank_mask(0) { for (int i = 0; i < 2; i++) { m_selected_bank[i] = 0; m_bank_base[i] = NULL; } } void msx_cart_ascii16::device_start() { save_item(NAME(m_selected_bank)); machine().save().register_postload(save_prepost_delegate(FUNC(msx_cart_ascii16::restore_banks), this)); } void msx_cart_ascii16::restore_banks() { for (int i = 0; i < 2; i++) { m_bank_base[i] = get_rom_base() + (m_selected_bank[i] & m_bank_mask) * 0x4000; } } void msx_cart_ascii16::device_reset() { for (int i = 0; i < 2; i++) { m_selected_bank[i] = 0; } } void msx_cart_ascii16::initialize_cartridge() { UINT32 size = get_rom_size(); if ( size > 256 * 0x4000 ) { fatalerror("ascii16: ROM is too big\n"); } UINT16 banks = size / 0x4000; if (size != banks * 0x4000 || (~(banks - 1) % banks)) { fatalerror("ascii16: Invalid ROM size\n"); } m_bank_mask = banks - 1; restore_banks(); } READ8_MEMBER(msx_cart_ascii16::read_cart) { if ( offset >= 0x4000 && offset < 0xC000 ) { return m_bank_base[offset >> 15][offset & 0x3fff]; } return 0xff; } WRITE8_MEMBER(msx_cart_ascii16::write_cart) { if (offset >= 0x6000 && offset < 0x6800) { m_selected_bank[0] = data; m_bank_base[0] = get_rom_base() + (m_selected_bank[0] & m_bank_mask) * 0x4000; } if (offset >= 0x7000 && offset < 0x7800) { m_selected_bank[1] = data; m_bank_base[1] = get_rom_base() + (m_selected_bank[1] & m_bank_mask) * 0x4000; } } msx_cart_ascii8_sram::msx_cart_ascii8_sram(const machine_config &mconfig, const char *tag, device_t *owner, UINT32 clock) : device_t(mconfig, MSX_CART_ASCII8_SRAM, "MSX Cartridge - ASCII8 w/SRAM", tag, owner, clock, "msx_cart_ascii8_sram", __FILE__) , msx_cart_interface(mconfig, *this) , m_bank_mask(0) , m_sram_select_mask(0) { for (int i = 0; i < 4; i++) { m_selected_bank[i] = 0; m_bank_base[i] = NULL; } } void msx_cart_ascii8_sram::device_start() { save_item(NAME(m_selected_bank)); machine().save().register_postload(save_prepost_delegate(FUNC(msx_cart_ascii8_sram::restore_banks), this)); } void msx_cart_ascii8_sram::setup_bank(UINT8 bank) { if (m_selected_bank[bank] & ~(m_sram_select_mask | m_bank_mask)) { // Nothing is mapped m_bank_base[bank] = NULL; } else if (m_selected_bank[bank] & m_sram_select_mask) { // SRAM is selected m_bank_base[bank] = get_sram_base(); } else { m_bank_base[bank] = get_rom_base() + (m_selected_bank[bank] & m_bank_mask ) * 0x2000; } } void msx_cart_ascii8_sram::restore_banks() { for (int i = 0; i < 4; i++) { setup_bank(i); } } void msx_cart_ascii8_sram::device_reset() { for (int i = 0; i < 4; i++) { m_selected_bank[i] = 0; } } void msx_cart_ascii8_sram::initialize_cartridge() { UINT32 size = get_rom_size(); if ( size > 128 * 0x2000 ) { fatalerror("ascii8_sram: ROM is too big\n"); } UINT16 banks = size / 0x2000; if (size != banks * 0x2000 || (~(banks - 1) % banks)) { fatalerror("ascii8_sram: Invalid ROM size\n"); } if (get_sram_size() != 0x2000) { fatalerror("ascii8_sram: Unsupported SRAM size\n"); } m_bank_mask = banks - 1; m_sram_select_mask = banks; restore_banks(); } READ8_MEMBER(msx_cart_ascii8_sram::read_cart) { if ( offset >= 0x4000 && offset < 0xC000 ) { UINT8 *bank_base = m_bank_base[(offset - 0x4000) >> 13]; if (bank_base != NULL) { return bank_base[offset & 0x1fff]; } } return 0xff; } WRITE8_MEMBER(msx_cart_ascii8_sram::write_cart) { if (offset >= 0x6000 && offset < 0x8000) { UINT8 bank = (offset / 0x800) & 0x03; m_selected_bank[bank] = data; setup_bank(bank); } else if (offset >= 0x8000 && offset < 0xc000) { UINT8 bank = (offset & 0x2000) ? 3 : 2; if ((m_selected_bank[bank] & m_sram_select_mask) && !(m_selected_bank[bank] & ~(m_sram_select_mask | m_bank_mask))) { // Write to SRAM m_bank_base[bank][offset & 0x1fff] = data; } } } msx_cart_ascii16_sram::msx_cart_ascii16_sram(const machine_config &mconfig, const char *tag, device_t *owner, UINT32 clock) : device_t(mconfig, MSX_CART_ASCII16_SRAM, "MSX Cartridge - ASCII16 w/SRAM", tag, owner, clock, "msx_cart_ascii16_sram", __FILE__) , msx_cart_interface(mconfig, *this) , m_bank_mask(0) , m_sram_select_mask(0) { for (int i = 0; i < 2; i++) { m_selected_bank[i] = 0; m_bank_base[i] = NULL; } } void msx_cart_ascii16_sram::device_start() { save_item(NAME(m_selected_bank)); machine().save().register_postload(save_prepost_delegate(FUNC(msx_cart_ascii16_sram::restore_banks), this)); } void msx_cart_ascii16_sram::setup_bank(UINT8 bank) { if (m_selected_bank[bank] & ~(m_sram_select_mask | m_bank_mask)) { // Nothing is mapped m_bank_base[bank] = NULL; } else if (m_selected_bank[bank] & m_sram_select_mask) { // SRAM is selected m_bank_base[bank] = get_sram_base(); } else { m_bank_base[bank] = get_rom_base() + (m_selected_bank[bank] & m_bank_mask) * 0x4000; } } void msx_cart_ascii16_sram::restore_banks() { for (int i = 0; i < 2; i++) { setup_bank(i); } } void msx_cart_ascii16_sram::device_reset() { for (int i = 0; i < 2; i++) { m_selected_bank[i] = 0; } } void msx_cart_ascii16_sram::initialize_cartridge() { UINT32 size = get_rom_size(); if ( size > 128 * 0x4000 ) { fatalerror("ascii16_sram: ROM is too big\n"); } UINT16 banks = size / 0x4000; if (size != banks * 0x4000 || (~(banks - 1) % banks)) { fatalerror("ascii16_sram: Invalid ROM size\n"); } if (get_sram_size() != 0x800) { fatalerror("ascii16_sram: Unsupported SRAM size\n"); } m_bank_mask = banks - 1; m_sram_select_mask = banks; restore_banks(); } READ8_MEMBER(msx_cart_ascii16_sram::read_cart) { if ( offset >= 0x4000 && offset < 0xC000 ) { UINT8 bank = offset >> 15; if (m_bank_base[bank] != NULL) { if (m_selected_bank[bank] & m_sram_select_mask) { return m_bank_base[bank][offset & 0x7ff]; } else { return m_bank_base[bank][offset & 0x3fff]; } } } return 0xff; } WRITE8_MEMBER(msx_cart_ascii16_sram::write_cart) { if (offset >= 0x6000 && offset < 0x6800) { m_selected_bank[0] = data; setup_bank(0); } if (offset >= 0x7000 && offset < 0x7800) { m_selected_bank[1] = data; setup_bank(1); } if (offset >= 0x8000 && offset < 0xc000) { if ((m_selected_bank[1] & m_sram_select_mask) && !(m_selected_bank[1] & ~(m_sram_select_mask | m_bank_mask))) { // Write to SRAM m_bank_base[1][offset & 0x7ff] = data; } } }