// license:BSD-3-Clause // copyright-holders:Nigel Barnes /********************************************************************** Currah MicroSlot **********************************************************************/ #include "emu.h" #include "uslot.h" //************************************************************************** // DEVICE DEFINITIONS //************************************************************************** DEFINE_DEVICE_TYPE(SPECTRUM_USLOT, spectrum_uslot_device, "spectrum_uslot", "Spectrum Currah \xC2\xB5Slot") //------------------------------------------------- // device_add_mconfig - add device configuration //------------------------------------------------- void spectrum_uslot_device::device_add_mconfig(machine_config &config) { /* passthru */ SPECTRUM_EXPANSION_SLOT(config, m_exp1, spectrum_expansion_devices, nullptr); m_exp1->irq_handler().set(DEVICE_SELF_OWNER, FUNC(spectrum_expansion_slot_device::irq_w)); m_exp1->nmi_handler().set(DEVICE_SELF_OWNER, FUNC(spectrum_expansion_slot_device::nmi_w)); SPECTRUM_EXPANSION_SLOT(config, m_exp2, spectrum_expansion_devices, nullptr); m_exp2->irq_handler().set(DEVICE_SELF_OWNER, FUNC(spectrum_expansion_slot_device::irq_w)); m_exp2->nmi_handler().set(DEVICE_SELF_OWNER, FUNC(spectrum_expansion_slot_device::nmi_w)); } //************************************************************************** // LIVE DEVICE //************************************************************************** //------------------------------------------------- // spectrum_uslot_device - constructor //------------------------------------------------- spectrum_uslot_device::spectrum_uslot_device(const machine_config &mconfig, const char *tag, device_t *owner, uint32_t clock) : device_t(mconfig, SPECTRUM_USLOT, tag, owner, clock) , device_spectrum_expansion_interface(mconfig, *this) , m_exp1(*this, "exp1") , m_exp2(*this, "exp2") { } //------------------------------------------------- // device_start - device-specific startup //------------------------------------------------- void spectrum_uslot_device::device_start() { } //------------------------------------------------- // device_reset - device-specific reset //------------------------------------------------- void spectrum_uslot_device::device_reset() { m_exp1->set_io_space(&io_space()); m_exp2->set_io_space(&io_space()); } //************************************************************************** // IMPLEMENTATION //************************************************************************** READ_LINE_MEMBER(spectrum_uslot_device::romcs) { return m_exp1->romcs() | m_exp2->romcs(); } READ8_MEMBER(spectrum_uslot_device::mreq_r) { uint8_t temp; uint8_t data = 0xff; temp = m_exp1->mreq_r(space, offset); if (m_exp1->romcs()) data &= temp; temp = m_exp2->mreq_r(space, offset); if (m_exp2->romcs()) data &= temp; return data; } WRITE8_MEMBER(spectrum_uslot_device::mreq_w) { if (m_exp1->romcs()) m_exp1->mreq_w(space, offset, data); if (m_exp2->romcs()) m_exp2->mreq_w(space, offset, data); } READ8_MEMBER(spectrum_uslot_device::port_fe_r) { uint8_t data = 0xff; if (m_exp1->romcs()) data &= m_exp1->port_fe_r(space, offset); if (m_exp2->romcs()) data &= m_exp2->port_fe_r(space, offset); return data; }