// license:BSD-3-Clause // copyright-holders:Nigel Barnes /********************************************************************** Tangerine TANDOS (MT0078) http://www.microtan.ukpc.net/pageProducts.html#DOS **********************************************************************/ #include "emu.h" #include "tandos.h" //************************************************************************** // DEVICE DEFINITIONS //************************************************************************** DEFINE_DEVICE_TYPE(TANBUS_TANDOS, tanbus_tandos_device, "tanbus_tandos", "Tangerine Tandos Board") //------------------------------------------------- // SLOT_INTERFACE( tandos_floppies ) //------------------------------------------------- static void tandos_floppies(device_slot_interface &device) { device.option_add("525sssd", FLOPPY_525_SSSD); device.option_add("525sd", FLOPPY_525_SD); device.option_add("525qd", FLOPPY_525_QD); } //------------------------------------------------- // ROM( tandos ) //------------------------------------------------- ROM_START(tandos) ROM_REGION(0x1000, "dos_rom", 0) ROM_DEFAULT_BIOS("step30") ROM_SYSTEM_BIOS(0, "step30", "30ms Stepping Rate") ROMX_LOAD("tandos_sr30.f2", 0x0000, 0x1000, CRC(54f55771) SHA1(5a801039fa8c05cd9227e9138469959524516c9e), ROM_BIOS(0)) ROM_SYSTEM_BIOS(1, "step6", "6ms Stepping Rate") ROMX_LOAD("tandos_sr6.f2", 0x0000, 0x1000, CRC(10ef90fa) SHA1(b1e42cbf7197e693073d2578561803ea4c8efa8c), ROM_BIOS(1)) ROM_END //------------------------------------------------- // device_add_mconfig - add device configuration //------------------------------------------------- void tanbus_tandos_device::device_add_mconfig(machine_config &config) { FD1793(config, m_fdc, 8_MHz_XTAL / 8); m_fdc->intrq_wr_callback().set(FUNC(tanbus_tandos_device::fdc_irq_w)); m_fdc->drq_wr_callback().set(FUNC(tanbus_tandos_device::fdc_drq_w)); m_fdc->hld_wr_callback().set(FUNC(tanbus_tandos_device::fdc_hld_w)); m_fdc->set_force_ready(true); FLOPPY_CONNECTOR(config, m_floppies[0], tandos_floppies, "525qd", floppy_image_device::default_mfm_floppy_formats).enable_sound(true); FLOPPY_CONNECTOR(config, m_floppies[1], tandos_floppies, "525qd", floppy_image_device::default_mfm_floppy_formats).enable_sound(true); FLOPPY_CONNECTOR(config, m_floppies[2], tandos_floppies, nullptr, floppy_image_device::default_mfm_floppy_formats).enable_sound(true); FLOPPY_CONNECTOR(config, m_floppies[3], tandos_floppies, nullptr, floppy_image_device::default_mfm_floppy_formats).enable_sound(true); } const tiny_rom_entry *tanbus_tandos_device::device_rom_region() const { return ROM_NAME(tandos); } //************************************************************************** // LIVE DEVICE //************************************************************************** //------------------------------------------------- // tanbus_tandos_device - constructor //------------------------------------------------- tanbus_tandos_device::tanbus_tandos_device(const machine_config &mconfig, const char *tag, device_t *owner, const XTAL &clock) : device_t(mconfig, TANBUS_TANDOS, tag, owner, clock) , device_tanbus_interface(mconfig, *this) , m_dos_rom(*this, "dos_rom") , m_fdc(*this, "fdc") , m_floppies(*this, "fdc:%u", 0) , m_floppy(nullptr) , m_drive_control(0) { } //------------------------------------------------- // device_start - device-specific startup //------------------------------------------------- void tanbus_tandos_device::device_start() { m_ram = std::make_unique(0x0400); save_pointer(NAME(m_ram), 0x0400); } //------------------------------------------------- // device_reset - device-specific reset //------------------------------------------------- void tanbus_tandos_device::device_reset() { // reset floppy control register control_w(0); } //------------------------------------------------- // read - card read //------------------------------------------------- uint8_t tanbus_tandos_device::read(offs_t offset, int inhrom, int inhram, int be) { uint8_t data = 0xff; switch (offset & 0xfc00) { case 0xa800: case 0xac00: case 0xb000: case 0xb400: data = m_dos_rom->base()[offset & 0x0fff]; break; case 0xb800: data = m_ram[offset & 0x03ff]; break; default: switch (offset) { case 0xbf90: case 0xbf91: case 0xbf92: case 0xbf93: data = m_fdc->read(offset & 0x03); break; case 0xbf94: case 0xbf96: data = status_r(); break; case 0xbf95: case 0xbf97: // GPIB PCB Switches break; case 0xbf98: case 0xbf99: case 0xbf9a: case 0xbf9b: case 0xbf9c: case 0xbf9d: case 0xbf9e: case 0xbf9f: // GPIB (9914) break; } break; } return data; } //------------------------------------------------- // write - card write //------------------------------------------------- void tanbus_tandos_device::write(offs_t offset, uint8_t data, int inhrom, int inhram, int be) { switch (offset & 0xfc00) { case 0xb800: m_ram[offset & 0x03ff] = data; break; default: switch (offset) { case 0xbf90: case 0xbf91: case 0xbf92: case 0xbf93: m_fdc->write(offset & 0x03, data); break; case 0xbf94: case 0xbf96: control_w(data); break; case 0xbf98: case 0xbf99: case 0xbf9a: case 0xbf9b: case 0xbf9c: case 0xbf9d: case 0xbf9e: case 0xbf9f: // GPIB (9914) break; } break; } } //------------------------------------------------- // set_inhibit_lines //------------------------------------------------- void tanbus_tandos_device::set_inhibit_lines(offs_t offset, int &inhram, int &inhrom) { if (offset >= 0xa800 && offset < 0xbc00) { inhram = 1; inhrom = 1; } }; //************************************************************************** // IMPLEMENTATION //************************************************************************** void tanbus_tandos_device::control_w(uint8_t data) { logerror("control_w %02x\n", data); m_drive_control = data; // bit 0: irq enable m_irq_enable = BIT(data, 0); // bit 1: data select (data stream controller) // bit 2, 3: drive select m_floppy = m_floppies[(data >> 2) & 0x03]->get_device(); m_fdc->set_floppy(m_floppy); // bit 4: side select if (m_floppy) m_floppy->ss_w(BIT(data, 4)); // bit 5: density m_fdc->dden_w(BIT(data, 5)); // bit 6: head load timing m_fdc->hlt_w(BIT(data, 6)); if (m_floppy) m_floppy->mon_w(!BIT(data, 6)); // bit 7: drq enable m_drq_enable = BIT(data, 7); } uint8_t tanbus_tandos_device::status_r() { uint8_t data = 0x00; data |= m_drive_control & 0x3c; data |= m_fdc->intrq_r() << 0; data |= m_fdc->hld_r() << 6; data |= m_fdc->drq_r() << 7; return data; } WRITE_LINE_MEMBER(tanbus_tandos_device::fdc_drq_w) { m_tanbus->so_w((m_drq_enable && state) ? ASSERT_LINE : CLEAR_LINE); } WRITE_LINE_MEMBER(tanbus_tandos_device::fdc_irq_w) { m_tanbus->irq_w((m_irq_enable && state) ? ASSERT_LINE : CLEAR_LINE); } WRITE_LINE_MEMBER(tanbus_tandos_device::fdc_hld_w) { logerror("fdc_hld_w %d\n", state); if (m_floppy) m_floppy->mon_w(state); }