// license:BSD-3-Clause // copyright-holders:Nigel Barnes /********************************************************************** Ralph Allen Disc Controller Card http://www.microtan.ukpc.net/6809/DOS_RTC.pdf **********************************************************************/ #include "emu.h" #include "radisc.h" #include "speaker.h" //************************************************************************** // DEVICE DEFINITIONS //************************************************************************** DEFINE_DEVICE_TYPE(TANBUS_RADISC, tanbus_radisc_device, "tanbus_radisc", "Ralph Allen Disc Controller Card") //------------------------------------------------- // MACHINE_DRIVER( radisc ) //------------------------------------------------- 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); } //------------------------------------------------- // device_add_mconfig - add device configuration //------------------------------------------------- void tanbus_radisc_device::device_add_mconfig(machine_config &config) { INPUT_MERGER_ANY_HIGH(config, m_irq_line).output_handler().set(FUNC(tanbus_radisc_device::fdc_irq_w)); FD1793(config, m_fdc, 4_MHz_XTAL / 4); m_fdc->intrq_wr_callback().set(m_irq_line, FUNC(input_merger_device::in_w)); m_fdc->drq_wr_callback().set(FUNC(tanbus_radisc_device::fdc_drq_w)); m_fdc->hld_wr_callback().set(FUNC(tanbus_radisc_device::fdc_hld_w)); m_fdc->set_force_ready(true); FLOPPY_CONNECTOR(config, m_floppies[0], tandos_floppies, "525qd", floppy_image_device::default_floppy_formats).enable_sound(true); FLOPPY_CONNECTOR(config, m_floppies[1], tandos_floppies, "525qd", floppy_image_device::default_floppy_formats).enable_sound(true); FLOPPY_CONNECTOR(config, m_floppies[2], tandos_floppies, nullptr, floppy_image_device::default_floppy_formats).enable_sound(true); FLOPPY_CONNECTOR(config, m_floppies[3], tandos_floppies, nullptr, floppy_image_device::default_floppy_formats).enable_sound(true); MC146818(config, m_rtc, 32.768_kHz_XTAL); m_rtc->irq().set(m_irq_line, FUNC(input_merger_device::in_w)); VIA6522(config, m_via, 4_MHz_XTAL / 4); m_via->irq_handler().set(m_irq_line, FUNC(input_merger_device::in_w)); /* audio hardware */ SPEAKER(config, "mono").front_center(); BEEP(config, m_beeper, 1000); // TODO: unknown frequency m_beeper->add_route(ALL_OUTPUTS, "mono", 1.0); } //************************************************************************** // LIVE DEVICE //************************************************************************** //------------------------------------------------- // tanbus_radisc_device - constructor //------------------------------------------------- tanbus_radisc_device::tanbus_radisc_device(const machine_config &mconfig, const char *tag, device_t *owner, uint32_t clock) : device_t(mconfig, TANBUS_RADISC, tag, owner, clock) , device_tanbus_interface(mconfig, *this) , m_fdc(*this, "fdc") , m_floppies(*this, "fdc:%u", 0) , m_floppy(nullptr) , m_rtc(*this, "rtc") , m_via(*this, "via") , m_irq_line(*this, "irq_line") , m_beeper(*this, "beeper") , m_beeper_state(0) , m_drive_control(0) { } //------------------------------------------------- // device_start - device-specific startup //------------------------------------------------- void tanbus_radisc_device::device_start() { } //------------------------------------------------- // device_reset - device-specific reset //------------------------------------------------- void tanbus_radisc_device::device_reset() { } //------------------------------------------------- // read - card read //------------------------------------------------- uint8_t tanbus_radisc_device::read(offs_t offset, int inhrom, int inhram, int be) { uint8_t data = 0xff; switch (offset) { case 0xbf80: case 0xbf81: case 0xbf82: case 0xbf83: case 0xbf84: case 0xbf85: case 0xbf86: case 0xbf87: case 0xbf88: case 0xbf89: case 0xbf8a: case 0xbf8b: case 0xbf8c: case 0xbf8d: case 0xbf8e: case 0xbf8f: data = m_via->read(offset & 0x0f); break; case 0xbf90: case 0xbf91: case 0xbf92: case 0xbf93: data = m_fdc->read(offset & 0x03); break; case 0xbf94: data = control_r(); break; case 0xbf98: case 0xbf99: data = m_rtc->read(offset & 0x01); break; } return data; } //------------------------------------------------- // write - card write //------------------------------------------------- void tanbus_radisc_device::write(offs_t offset, uint8_t data, int inhrom, int inhram, int be) { switch (offset) { case 0xbf80: case 0xbf81: case 0xbf82: case 0xbf83: case 0xbf84: case 0xbf85: case 0xbf86: case 0xbf87: case 0xbf88: case 0xbf89: case 0xbf8a: case 0xbf8b: case 0xbf8c: case 0xbf8d: case 0xbf8e: case 0xbf8f: m_via->write(offset & 0x0f, data); break; case 0xbf90: case 0xbf91: case 0xbf92: case 0xbf93: m_fdc->write(offset & 0x03, data); break; case 0xbf94: control_w(data); break; case 0xbf95: m_beeper_state ^= 1; m_beeper->set_state(m_beeper_state); break; case 0xbf98: case 0xbf99: m_rtc->write(offset & 0x01, data); break; } } //************************************************************************** // IMPLEMENTATION //************************************************************************** void tanbus_radisc_device::control_w(uint8_t val) { logerror("control_w %02x\n", val); m_drive_control = val; // bit 0: irq enable m_irq_enable = BIT(val, 0); // bit 1: data select (data stream controller) // bit 2, 3: drive select m_floppy = m_floppies[(val >> 2) & 0x03]->get_device(); m_fdc->set_floppy(m_floppy); // bit 4: side select if (m_floppy) m_floppy->ss_w(BIT(val, 4)); // bit 5: density m_fdc->dden_w(BIT(val, 5)); // bit 6: head load if (m_floppy) m_floppy->mon_w(BIT(val, 6)); // bit 7: drq enable m_drq_enable = BIT(val, 7); } uint8_t tanbus_radisc_device::control_r() { logerror("control_r %02x\n", m_drive_control); return m_drive_control; } WRITE_LINE_MEMBER(tanbus_radisc_device::fdc_drq_w) { m_tanbus->so_w((m_drq_enable && state) ? ASSERT_LINE : CLEAR_LINE); } WRITE_LINE_MEMBER(tanbus_radisc_device::fdc_irq_w) { m_tanbus->irq_w((m_irq_enable && state) ? ASSERT_LINE : CLEAR_LINE); } WRITE_LINE_MEMBER(tanbus_radisc_device::fdc_hld_w) { logerror("fdc_hld_w %d\n", state); if (m_floppy) m_floppy->mon_w(state); }