// license:BSD-3-Clause // copyright-holders:Barry Rodewald /* * ddi1.cpp -- Amstrad DDI-1 Floppy Disk Drive interface */ #include "emu.h" #include "ddi1.h" #include "softlist_dev.h" void cpc_exp_cards(device_slot_interface &device); //************************************************************************** // DEVICE DEFINITIONS //************************************************************************** DEFINE_DEVICE_TYPE(CPC_DDI1, cpc_ddi1_device, "cpc_ddi1", "Amstrad DDI-1") static void ddi1_floppies(device_slot_interface &device) { device.option_add("3ssdd", FLOPPY_3_SSDD); } //------------------------------------------------- // Device ROM definition //------------------------------------------------- ROM_START( cpc_ddi1 ) ROM_REGION( 0x4000, "disc_rom", 0 ) ROM_LOAD("cpcados.rom", 0x0000, 0x4000, CRC(1fe22ecd) SHA1(39102c8e9cb55fcc0b9b62098780ed4a3cb6a4bb)) ROM_END //------------------------------------------------- // rom_region - device-specific ROM region //------------------------------------------------- const tiny_rom_entry *cpc_ddi1_device::device_rom_region() const { return ROM_NAME( cpc_ddi1 ); } // device machine config void cpc_ddi1_device::device_add_mconfig(machine_config &config) { UPD765A(config, m_fdc, DERIVED_CLOCK(1, 1), true, true); // pin 50 clock multiplied to 8 MHz, then divided back down through SMC FDC9229BT FLOPPY_CONNECTOR(config, m_connector, ddi1_floppies, "3ssdd", floppy_image_device::default_mfm_floppy_formats); SOFTWARE_LIST(config, "flop_list").set_original("cpc_flop"); // pass-through cpc_expansion_slot_device &exp(CPC_EXPANSION_SLOT(config, "exp", DERIVED_CLOCK(1, 1), cpc_exp_cards, nullptr)); exp.irq_callback().set(DEVICE_SELF_OWNER, FUNC(cpc_expansion_slot_device::irq_w)); exp.nmi_callback().set(DEVICE_SELF_OWNER, FUNC(cpc_expansion_slot_device::nmi_w)); exp.romdis_callback().set(DEVICE_SELF_OWNER, FUNC(cpc_expansion_slot_device::romdis_w)); // ROMDIS } //************************************************************************** // LIVE DEVICE //************************************************************************** cpc_ddi1_device::cpc_ddi1_device(const machine_config &mconfig, const char *tag, device_t *owner, uint32_t clock) : device_t(mconfig, CPC_DDI1, tag, owner, clock), device_cpc_expansion_card_interface(mconfig, *this), m_slot(nullptr), m_fdc(*this,"upd765"), m_connector(*this,"upd765:0"), m_rom_active(false), m_romen(false) { } //------------------------------------------------- // device_start - device-specific startup //------------------------------------------------- void cpc_ddi1_device::device_start() { m_slot = dynamic_cast(owner()); address_space &space = m_slot->cpu().space(AS_IO); space.install_write_handler(0xfa7e,0xfa7f, write8sm_delegate(*this, FUNC(cpc_ddi1_device::motor_w))); space.install_readwrite_handler(0xfb7e,0xfb7f, read8sm_delegate(*this, FUNC(cpc_ddi1_device::fdc_r)), write8sm_delegate(*this, FUNC(cpc_ddi1_device::fdc_w))); space.install_write_handler(0xdf00,0xdfff, write8smo_delegate(*this, FUNC(cpc_ddi1_device::rombank_w))); } //------------------------------------------------- // device_reset - device-specific reset //------------------------------------------------- void cpc_ddi1_device::device_reset() { m_rom_active = false; } void cpc_ddi1_device::motor_w(offs_t offset, uint8_t data) { switch(offset) { case 0x00: case 0x01: { /* FDC Motor Control - Bit 0 defines the state of the FDD motor: * "1" the FDD motor will be active. * "0" the FDD motor will be in-active.*/ floppy_image_device *floppy; if(m_connector) { floppy = m_connector->get_device(); if(floppy) floppy->mon_w(!BIT(data, 0)); } break; } } } void cpc_ddi1_device::fdc_w(offs_t offset, uint8_t data) { switch(offset) { case 0x01: m_fdc->fifo_w(data); break; } } uint8_t cpc_ddi1_device::fdc_r(offs_t offset) { uint8_t data = 0xff; switch(offset) { case 0x00: data = m_fdc->msr_r(); break; case 0x01: data = m_fdc->fifo_r(); break; } return data; } void cpc_ddi1_device::rombank_w(uint8_t data) { if(data == 0x07) m_rom_active = true; else m_rom_active = false; m_slot->rom_select(data); } void cpc_ddi1_device::set_mapping(uint8_t type) { if(type != MAP_UPPER) return; if(m_rom_active) { uint8_t* ROM = memregion("disc_rom")->base(); membank(":bank7")->set_base(ROM); membank(":bank8")->set_base(ROM+0x2000); } }