// license:BSD-3-Clause // copyright-holders:Nigel Barnes /********************************************************************** Martin Allcorn's Games ROM **********************************************************************/ #include "emu.h" #include "magrom.h" //************************************************************************** // DEVICE DEFINITIONS //************************************************************************** DEFINE_DEVICE_TYPE(MTX_MAGROM, mtx_magrom_device, "mtx_magrom", "MTX MAGROM") //------------------------------------------------- // INPUT_PORTS( magrom ) //------------------------------------------------- INPUT_PORTS_START(magrom) PORT_START("JUMPERS") PORT_CONFNAME(0x03, 0x01, "System") PORT_CONFSETTING(0x00, "MTX500") PORT_CONFSETTING(0x01, "MTX512") PORT_CONFSETTING(0x03, "RS128") PORT_CONFNAME(0x04, 0x00, "ROM ID") PORT_CONFSETTING(0x00, "GROM") PORT_CONFSETTING(0x04, "ROM 6") INPUT_PORTS_END //------------------------------------------------- // input_ports - device-specific input ports //------------------------------------------------- ioport_constructor mtx_magrom_device::device_input_ports() const { return INPUT_PORTS_NAME(magrom); } //************************************************************************** // LIVE DEVICE //************************************************************************** //------------------------------------------------- // mtx_magrom_device - constructor //------------------------------------------------- mtx_magrom_device::mtx_magrom_device(const machine_config &mconfig, const char *tag, device_t *owner, uint32_t clock) : device_t(mconfig, MTX_MAGROM, tag, owner, clock) , device_mtx_exp_interface(mconfig, *this) , m_bank(*this, "bank") , m_jumpers(*this, "JUMPERS") { } //------------------------------------------------- // device_start - device-specific startup //------------------------------------------------- void mtx_magrom_device::device_start() { } //------------------------------------------------- // device_reset - device-specific reset //------------------------------------------------- void mtx_magrom_device::device_reset() { m_bank->configure_entries(0, 32, get_rom_base(), 0x4000); int rom_id = (m_jumpers->read() & 0x04) ? 6 : 7; machine().root_device().membank("rommap_bank1")->configure_entry(rom_id, get_rom_base() + 0x2000); io_space().install_write_handler(0xfb, 0xfb, write8smo_delegate(*this, FUNC(mtx_magrom_device::page_w))); } //************************************************************************** // IMPLEMENTATION //************************************************************************** void mtx_magrom_device::bankswitch(uint8_t data) { int page = m_jumpers->read() & 0x03; if (!BIT(data, 7) && BIT(data, 0, 4) == page) program_space().install_read_bank(0x4000, 0x7fff, m_bank); } void mtx_magrom_device::page_w(uint8_t data) { m_bank->set_entry(data & 0x1f); }