// license:GPL-2.0+ // copyright-holders:Dirk Best /*************************************************************************** SVI 318/328 Expansion Slot 50-pin slot ***************************************************************************/ #include "emu.h" #include "expander.h" //************************************************************************** // DEVICE DEFINITIONS //************************************************************************** DEFINE_DEVICE_TYPE(SVI_EXPANDER, svi_expander_device, "svi_expander", "SVI 318/328 Expander Bus") //************************************************************************** // SLOT DEVICE //************************************************************************** //------------------------------------------------- // svi_expander_device - constructor //------------------------------------------------- svi_expander_device::svi_expander_device(const machine_config &mconfig, const char *tag, device_t *owner, uint32_t clock) : device_t(mconfig, SVI_EXPANDER, tag, owner, clock), device_single_card_slot_interface(mconfig, *this), m_module(nullptr), m_int_handler(*this), m_romdis_handler(*this), m_ramdis_handler(*this), m_ctrl1_handler(*this), m_ctrl2_handler(*this), m_excsr_handler(*this), m_excsw_handler(*this) { } //------------------------------------------------- // svi_expander_device - destructor //------------------------------------------------- svi_expander_device::~svi_expander_device() { } //------------------------------------------------- // device_start - device-specific startup //------------------------------------------------- void svi_expander_device::device_start() { // get inserted module m_module = get_card_device(); // resolve callbacks m_int_handler.resolve_safe(); m_romdis_handler.resolve_safe(); m_ramdis_handler.resolve_safe(); m_ctrl1_handler.resolve_safe(); m_ctrl2_handler.resolve_safe(); m_excsr_handler.resolve_safe(0xff); m_excsw_handler.resolve_safe(); } //------------------------------------------------- // host to module interface //------------------------------------------------- uint8_t svi_expander_device::mreq_r(offs_t offset) { romdis_w(1); ramdis_w(1); if (m_module) return m_module->mreq_r(offset); return 0xff; } void svi_expander_device::mreq_w(offs_t offset, uint8_t data) { romdis_w(1); ramdis_w(1); if (m_module) m_module->mreq_w(offset, data); } uint8_t svi_expander_device::iorq_r(offs_t offset) { if (m_module) return m_module->iorq_r(offset); return 0xff; } void svi_expander_device::iorq_w(offs_t offset, uint8_t data) { if (m_module) m_module->iorq_w(offset, data); } WRITE_LINE_MEMBER( svi_expander_device::bk21_w ) { if (m_module) m_module->bk21_w(state); } WRITE_LINE_MEMBER( svi_expander_device::bk22_w ) { if (m_module) m_module->bk22_w(state); } WRITE_LINE_MEMBER( svi_expander_device::bk31_w ) { if (m_module) m_module->bk31_w(state); } WRITE_LINE_MEMBER( svi_expander_device::bk32_w ) { if (m_module) m_module->bk32_w(state); } //************************************************************************** // CARTRIDGE INTERFACE //************************************************************************** //------------------------------------------------- // device_svi_expander_interface - constructor //------------------------------------------------- device_svi_expander_interface::device_svi_expander_interface(const machine_config &mconfig, device_t &device) : device_interface(device, "svi3x8exp") { m_expander = dynamic_cast(device.owner()); } //------------------------------------------------- // ~device_expansion_interface - destructor //------------------------------------------------- device_svi_expander_interface::~device_svi_expander_interface() { }