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spectrum: Added the Technology Research Beta 128 Disk Interface.
This commit is contained in:
Nigel Barnes
parent
cb60e245dc
commit
596c68e755
@ -3287,6 +3287,8 @@ if (BUSES["SPECTRUM"]~=null) then
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files {
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MAME_DIR .. "src/devices/bus/spectrum/exp.cpp",
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MAME_DIR .. "src/devices/bus/spectrum/exp.h",
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MAME_DIR .. "src/devices/bus/spectrum/beta.cpp",
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MAME_DIR .. "src/devices/bus/spectrum/beta.h",
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MAME_DIR .. "src/devices/bus/spectrum/intf1.cpp",
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MAME_DIR .. "src/devices/bus/spectrum/intf1.h",
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MAME_DIR .. "src/devices/bus/spectrum/intf2.cpp",
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256
src/devices/bus/spectrum/beta.cpp
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256
src/devices/bus/spectrum/beta.cpp
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@ -0,0 +1,256 @@
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// license:BSD-3-Clause
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// copyright-holders:Nigel Barnes
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/*********************************************************************
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Technology Research Beta 128 Disk interface
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*********************************************************************/
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#include "emu.h"
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#include "beta.h"
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/***************************************************************************
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DEVICE DEFINITIONS
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***************************************************************************/
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DEFINE_DEVICE_TYPE(SPECTRUM_BETA128, spectrum_beta128_device, "spectrum_beta128", "TR Beta 128 Disk Interface")
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//-------------------------------------------------
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// INPUT_PORTS( beta128 )
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//-------------------------------------------------
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INPUT_PORTS_START(beta128)
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PORT_START("BUTTON")
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PORT_BIT(0x01, IP_ACTIVE_LOW, IPT_BUTTON1) PORT_NAME("Magic Button") PORT_CODE(KEYCODE_F12) PORT_CHANGED_MEMBER(DEVICE_SELF, spectrum_beta128_device, magic_button, nullptr)
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PORT_START("SWITCH")
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PORT_CONFNAME(0x03, 0x01, "System Switch") //PORT_CHANGED_MEMBER(DEVICE_SELF, spectrum_beta128_device, switch_changed, 0)
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PORT_CONFSETTING(0x00, "Off (128)")
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PORT_CONFSETTING(0x01, "Normal (auto-boot)")
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//PORT_CONFSETTING(0x02, "Reset") // TODO: implement RESET callback
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INPUT_PORTS_END
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//-------------------------------------------------
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// input_ports - device-specific input ports
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//-------------------------------------------------
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ioport_constructor spectrum_beta128_device::device_input_ports() const
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{
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return INPUT_PORTS_NAME(beta128);
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}
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//-------------------------------------------------
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// SLOT_INTERFACE( beta_floppies )
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//-------------------------------------------------
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static void beta_floppies(device_slot_interface &device)
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{
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device.option_add("525qd", FLOPPY_525_QD);
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}
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//-------------------------------------------------
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// floppy_format_type floppy_formats
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//-------------------------------------------------
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FLOPPY_FORMATS_MEMBER(spectrum_beta128_device::floppy_formats)
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FLOPPY_TRD_FORMAT
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FLOPPY_FORMATS_END
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//-------------------------------------------------
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// ROM( beta )
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//-------------------------------------------------
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ROM_START(beta128)
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ROM_REGION(0x4000, "rom", 0)
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ROM_DEFAULT_BIOS("trd504")
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ROM_SYSTEM_BIOS(0, "trd501", "TR-DOS v5.01")
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ROMX_LOAD("trd501.rom", 0x0000, 0x4000, CRC(3e3cdd4c) SHA1(8303ba0cc79daa6c04cd1e6ce27e8b6886a3f0de), ROM_BIOS(0))
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ROM_SYSTEM_BIOS(1, "trd503", "TR-DOS v5.03")
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ROMX_LOAD("trd503.rom", 0x0000, 0x4000, CRC(10751aba) SHA1(21695e3f2a8f796386ce66eea8a246b0ac44810c), ROM_BIOS(1))
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ROM_SYSTEM_BIOS(2, "trd504", "TR-DOS v5.04")
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ROMX_LOAD("trd504.rom", 0x0000, 0x4000, CRC(ba310874) SHA1(05e55e37df8eee6c68601ba9cf6c92195852ce3f), ROM_BIOS(2))
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ROM_END
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//-------------------------------------------------
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// device_add_mconfig - add device configuration
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//-------------------------------------------------
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void spectrum_beta128_device::device_add_mconfig(machine_config &config)
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{
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FD1793(config, m_fdc, 4_MHz_XTAL / 4);
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FLOPPY_CONNECTOR(config, "fdc:0", beta_floppies, "525qd", spectrum_beta128_device::floppy_formats).enable_sound(true);
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FLOPPY_CONNECTOR(config, "fdc:1", beta_floppies, "525qd", spectrum_beta128_device::floppy_formats).enable_sound(true);
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FLOPPY_CONNECTOR(config, "fdc:2", beta_floppies, nullptr, spectrum_beta128_device::floppy_formats).enable_sound(true);
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FLOPPY_CONNECTOR(config, "fdc:3", beta_floppies, nullptr, spectrum_beta128_device::floppy_formats).enable_sound(true);
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// passthru
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SPECTRUM_EXPANSION_SLOT(config, m_exp, spectrum_expansion_devices, nullptr);
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m_exp->irq_handler().set(DEVICE_SELF_OWNER, FUNC(spectrum_expansion_slot_device::irq_w));
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m_exp->nmi_handler().set(DEVICE_SELF_OWNER, FUNC(spectrum_expansion_slot_device::nmi_w));
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}
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const tiny_rom_entry *spectrum_beta128_device::device_rom_region() const
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{
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return ROM_NAME(beta128);
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}
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//**************************************************************************
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// LIVE DEVICE
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//**************************************************************************
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//-------------------------------------------------
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// spectrum_beta128_device - constructor
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//-------------------------------------------------
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spectrum_beta128_device::spectrum_beta128_device(const machine_config &mconfig, const char *tag, device_t *owner, uint32_t clock)
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: device_t(mconfig, SPECTRUM_BETA128, tag, owner, clock)
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, device_spectrum_expansion_interface(mconfig, *this)
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, m_rom(*this, "rom")
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, m_fdc(*this, "fdc")
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, m_floppy(*this, "fdc:%u", 0)
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, m_exp(*this, "exp")
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, m_switch(*this, "SWITCH")
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{
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}
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//-------------------------------------------------
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// device_start - device-specific startup
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//-------------------------------------------------
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void spectrum_beta128_device::device_start()
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{
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save_item(NAME(m_romcs));
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}
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//-------------------------------------------------
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// device_reset - device-specific reset
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//-------------------------------------------------
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void spectrum_beta128_device::device_reset()
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{
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// Page in the ROM if auto-boot is selected
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if (m_switch->read() == 0x01)
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m_romcs = 1;
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else
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m_romcs = 0;
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}
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//**************************************************************************
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// IMPLEMENTATION
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//**************************************************************************
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READ_LINE_MEMBER(spectrum_beta128_device::romcs)
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{
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return m_romcs | m_exp->romcs();
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}
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void spectrum_beta128_device::opcode_fetch(offs_t offset)
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{
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m_exp->opcode_fetch(offset);
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if (!machine().side_effects_disabled())
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{
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if ((offset == 0x0066) || (offset & 0xff00) == 0x3d00)
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m_romcs = 1;
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else if (offset >= 0x4000)
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m_romcs = 0;
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}
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}
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uint8_t spectrum_beta128_device::iorq_r(offs_t offset)
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{
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uint8_t data = m_exp->iorq_r(offset);
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if (m_romcs)
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{
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switch (offset & 0xff)
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{
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case 0x1f: case 0x3f: case 0x5f: case 0x7f:
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data = m_fdc->read((offset >> 5) & 0x03);
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break;
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case 0xff:
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data &= 0x3f; // actually open bus
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data |= m_fdc->drq_r() ? 0x40 : 0;
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data |= m_fdc->intrq_r() ? 0x80 : 0;
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break;
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}
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}
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return data;
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}
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void spectrum_beta128_device::iorq_w(offs_t offset, uint8_t data)
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{
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if (m_romcs)
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{
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switch (offset & 0xff)
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{
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case 0x1f: case 0x3f: case 0x5f: case 0x7f:
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m_fdc->write((offset >> 5) & 0x03, data);
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break;
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case 0xff:
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floppy_image_device* floppy = m_floppy[data & 3]->get_device();
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m_fdc->set_floppy(floppy);
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if (floppy)
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floppy->ss_w(BIT(data, 4) ? 0 : 1);
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m_fdc->dden_w(BIT(data, 6));
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// bit 3 connected to pin 23 "HLT" of FDC and via diode to INDEX
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//m_fdc->hlt_w(BIT(data, 3)); // not handled in current wd_fdc
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if (BIT(data, 2) == 0) // reset
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{
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m_fdc->reset();
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if (floppy)
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floppy->mon_w(ASSERT_LINE);
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}
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else
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{
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// TODO: implement correct motor control, FDD motor and RDY FDC pin controlled by HLD pin of FDC
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if (floppy)
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floppy->mon_w(CLEAR_LINE);
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}
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break;
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}
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}
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m_exp->iorq_w(offset, data);
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}
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uint8_t spectrum_beta128_device::mreq_r(offs_t offset)
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{
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uint8_t data = 0xff;
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if (m_romcs)
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{
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data = m_rom->base()[offset & 0x3fff];
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}
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if (m_exp->romcs())
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data &= m_exp->mreq_r(offset);
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return data;
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}
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void spectrum_beta128_device::mreq_w(offs_t offset, uint8_t data)
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{
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if (m_exp->romcs())
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m_exp->mreq_w(offset, data);
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}
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INPUT_CHANGED_MEMBER(spectrum_beta128_device::magic_button)
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{
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if (newval && !oldval)
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{
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m_slot->nmi_w(ASSERT_LINE);
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}
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else
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{
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m_slot->nmi_w(CLEAR_LINE);
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}
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}
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64
src/devices/bus/spectrum/beta.h
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64
src/devices/bus/spectrum/beta.h
Normal file
@ -0,0 +1,64 @@
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// license:BSD-3-Clause
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// copyright-holders:Nigel Barnes
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/*********************************************************************
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Technology Research Beta 128 Disk interface
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*********************************************************************/
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#ifndef MAME_BUS_SPECTRUM_BETA_H
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#define MAME_BUS_SPECTRUM_BETA_H
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#include "exp.h"
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#include "softlist.h"
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#include "imagedev/floppy.h"
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#include "machine/wd_fdc.h"
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#include "formats/trd_dsk.h"
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//**************************************************************************
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// TYPE DEFINITIONS
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//**************************************************************************
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class spectrum_beta128_device :
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public device_t,
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public device_spectrum_expansion_interface
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{
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public:
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// construction/destruction
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spectrum_beta128_device(const machine_config &mconfig, const char *tag, device_t *owner, uint32_t clock);
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DECLARE_FLOPPY_FORMATS(floppy_formats);
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DECLARE_INPUT_CHANGED_MEMBER(magic_button);
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protected:
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// device-level overrides
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virtual void device_start() override;
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virtual void device_reset() override;
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// optional information overrides
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virtual void device_add_mconfig(machine_config &config) override;
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virtual const tiny_rom_entry *device_rom_region() const override;
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virtual ioport_constructor device_input_ports() const override;
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virtual void opcode_fetch(offs_t offset) override;
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virtual uint8_t mreq_r(offs_t offset) override;
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virtual void mreq_w(offs_t offset, uint8_t data) override;
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virtual uint8_t iorq_r(offs_t offset) override;
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virtual void iorq_w(offs_t offset, uint8_t data) override;
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virtual DECLARE_READ_LINE_MEMBER(romcs) override;
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required_memory_region m_rom;
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required_device<fd1793_device> m_fdc;
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required_device_array<floppy_connector, 4> m_floppy;
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required_device<spectrum_expansion_slot_device> m_exp;
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required_ioport m_switch;
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int m_romcs;
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};
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// device type definition
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DECLARE_DEVICE_TYPE(SPECTRUM_BETA128, spectrum_beta128_device)
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#endif // MAME_BUS_SPECTRUM_BETA_H
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@ -158,7 +158,7 @@ void spectrum_expansion_slot_device::mreq_w(offs_t offset, uint8_t data)
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// slot devices
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//#include "beta.h"
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#include "beta.h"
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//#include "disciple.h"
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#include "intf1.h"
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#include "intf2.h"
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@ -178,8 +178,7 @@ void spectrum_expansion_slot_device::mreq_w(offs_t offset, uint8_t data)
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void spectrum_expansion_devices(device_slot_interface &device)
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{
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//device.option_add("beta", SPECTRUM_BETA);
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//device.option_add("betaplus", SPECTRUM_BETAPLUS);
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device.option_add("beta128", SPECTRUM_BETA128);
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//device.option_add("disciple", SPECTRUM_DISCIPLE);
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device.option_add("intf1", SPECTRUM_INTF1);
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device.option_add("intf2", SPECTRUM_INTF2);
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@ -200,7 +199,7 @@ void spectrum_expansion_devices(device_slot_interface &device)
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void spec128_expansion_devices(device_slot_interface &device)
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{
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//device.option_add("beta128", SPECTRUM_BETA128);
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device.option_add("beta128", SPECTRUM_BETA128);
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//device.option_add("disciple", SPECTRUM_DISCIPLE);
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device.option_add("intf1", SPECTRUM_INTF1);
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device.option_add("intf2", SPECTRUM_INTF2);
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