#include "emu.h" #include "msxdos2.h" const device_type MSX_CART_MSXDOS2 = &device_creator; msx_cart_msxdos2::msx_cart_msxdos2(const machine_config &mconfig, const char *tag, device_t *owner, UINT32 clock) : device_t(mconfig, MSX_CART_MSXDOS2, "MSX Cartridge - MSXDOS2", tag, owner, clock, "msx_cart_msxdos2", __FILE__) , msx_cart_interface(mconfig, *this) , m_selected_bank(0) , m_bank_base(NULL) { } void msx_cart_msxdos2::device_start() { save_item(NAME(m_selected_bank)); machine().save().register_postload(save_prepost_delegate(FUNC(msx_cart_msxdos2::restore_banks), this)); } void msx_cart_msxdos2::restore_banks() { m_bank_base = get_rom_base() + ( m_selected_bank & 0x03 ) * 0x4000; } void msx_cart_msxdos2::device_reset() { m_selected_bank = 0; } void msx_cart_msxdos2::initialize_cartridge() { if (get_rom_size() != 0x10000) { fatalerror("msxdos2: Invalid ROM size\n"); } restore_banks(); } READ8_MEMBER(msx_cart_msxdos2::read_cart) { if (offset >= 0x4000 && offset < 0x8000) { return m_bank_base[offset & 0x3fff]; } return 0xff; } WRITE8_MEMBER(msx_cart_msxdos2::write_cart) { if (offset == 0x6000) { m_selected_bank = data; restore_banks(); } }