// license:BSD-3-Clause // copyright-holders:Curt Coder /********************************************************************** S-100 (IEEE-696/1983) bus emulation **********************************************************************/ #include "emu.h" #include "s100.h" //************************************************************************** // DEVICE DEFINITIONS //************************************************************************** DEFINE_DEVICE_TYPE(S100_BUS, s100_bus_device, "s100_bus", "S100 bus") DEFINE_DEVICE_TYPE(S100_SLOT, s100_slot_device, "s100_slot", "S100 slot") //************************************************************************** // LIVE DEVICE //************************************************************************** //------------------------------------------------- // device_s100_card_interface - constructor //------------------------------------------------- device_s100_card_interface::device_s100_card_interface(const machine_config &mconfig, device_t &device) : device_slot_card_interface(mconfig, device), m_bus(nullptr), m_next(nullptr) { } //------------------------------------------------- // s100_slot_device - constructor //------------------------------------------------- s100_slot_device::s100_slot_device(const machine_config &mconfig, const char *tag, device_t *owner, uint32_t clock) : device_t(mconfig, S100_SLOT, tag, owner, clock), device_slot_interface(mconfig, *this), m_bus(*this, DEVICE_SELF_OWNER) { } //------------------------------------------------- // device_start - device-specific startup //------------------------------------------------- void s100_slot_device::device_start() { device_s100_card_interface *dev = dynamic_cast(get_card_device()); if (dev) m_bus->add_card(dev); } //------------------------------------------------- // s100_bus_device - constructor //------------------------------------------------- s100_bus_device::s100_bus_device(const machine_config &mconfig, const char *tag, device_t *owner, uint32_t clock) : device_t(mconfig, S100_BUS, tag, owner, clock), m_write_irq(*this), m_write_nmi(*this), m_write_vi0(*this), m_write_vi1(*this), m_write_vi2(*this), m_write_vi3(*this), m_write_vi4(*this), m_write_vi5(*this), m_write_vi6(*this), m_write_vi7(*this), m_write_dma0(*this), m_write_dma1(*this), m_write_dma2(*this), m_write_dma3(*this), m_write_rdy(*this), m_write_hold(*this), m_write_error(*this) { } //------------------------------------------------- // device_start - device-specific startup //------------------------------------------------- void s100_bus_device::device_start() { // resolve callbacks m_write_irq.resolve_safe(); m_write_nmi.resolve_safe(); m_write_vi0.resolve_safe(); m_write_vi1.resolve_safe(); m_write_vi2.resolve_safe(); m_write_vi3.resolve_safe(); m_write_vi4.resolve_safe(); m_write_vi5.resolve_safe(); m_write_vi6.resolve_safe(); m_write_vi7.resolve_safe(); m_write_dma0.resolve_safe(); m_write_dma1.resolve_safe(); m_write_dma2.resolve_safe(); m_write_dma3.resolve_safe(); m_write_rdy.resolve_safe(); m_write_hold.resolve_safe(); m_write_error.resolve_safe(); } //------------------------------------------------- // device_reset - device-specific reset //------------------------------------------------- void s100_bus_device::device_reset() { } //------------------------------------------------- // add_card - add card //------------------------------------------------- void s100_bus_device::add_card(device_s100_card_interface *card) { card->m_bus = this; m_device_list.append(*card); } //------------------------------------------------- // smemr_r - memory read //------------------------------------------------- uint8_t s100_bus_device::smemr_r(offs_t offset) { uint8_t data = 0xff; device_s100_card_interface *entry = m_device_list.first(); while (entry) { data &= entry->s100_smemr_r(offset); entry = entry->next(); } return data; } //------------------------------------------------- // mwrt_w - memory write //------------------------------------------------- void s100_bus_device::mwrt_w(offs_t offset, uint8_t data) { device_s100_card_interface *entry = m_device_list.first(); while (entry) { entry->s100_mwrt_w(offset, data); entry = entry->next(); } } //------------------------------------------------- // sinp_r - I/O read //------------------------------------------------- uint8_t s100_bus_device::sinp_r(offs_t offset) { uint8_t data = 0xff; device_s100_card_interface *entry = m_device_list.first(); while (entry) { data &= entry->s100_sinp_r(offset); entry = entry->next(); } return data; } //------------------------------------------------- // sout_w - I/O write //------------------------------------------------- void s100_bus_device::sout_w(offs_t offset, uint8_t data) { device_s100_card_interface *entry = m_device_list.first(); while (entry) { entry->s100_sout_w(offset, data); entry = entry->next(); } }