// license:GPL-2.0+ // copyright-holders:Dirk Best /*************************************************************************** PC/AT 486 with Chips & Technologies CS4031 chipset ***************************************************************************/ #include "emu.h" #include "cpu/i386/i386.h" #include "machine/at_keybc.h" #include "machine/cs4031.h" #include "machine/ram.h" #include "sound/spkrdev.h" #include "bus/isa/isa.h" #include "bus/isa/isa_cards.h" #include "bus/pc_kbd/keyboards.h" #include "bus/pc_kbd/pc_kbdc.h" #include "emupal.h" #include "softlist.h" #include "softlist_dev.h" #include "speaker.h" //************************************************************************** // TYPE DEFINITIONS //************************************************************************** class ct486_state : public driver_device { public: ct486_state(const machine_config &mconfig, device_type type, const char *tag) : driver_device(mconfig, type, tag), m_maincpu(*this, "maincpu"), m_cs4031(*this, "cs4031"), m_isabus(*this, "isabus"), m_speaker(*this, "speaker") { } required_device m_maincpu; required_device m_cs4031; required_device m_isabus; required_device m_speaker; virtual void machine_start() override; DECLARE_READ16_MEMBER( cs4031_ior ); DECLARE_WRITE16_MEMBER( cs4031_iow ); DECLARE_WRITE_LINE_MEMBER( cs4031_hold ); DECLARE_WRITE8_MEMBER( cs4031_tc ) { m_isabus->eop_w(offset, data); } DECLARE_WRITE_LINE_MEMBER( cs4031_spkr ) { m_speaker->level_w(state); } void ct486(machine_config &config); void ct486_io(address_map &map); void ct486_map(address_map &map); }; //************************************************************************** // MACHINE EMULATION //************************************************************************** void ct486_state::machine_start() { } READ16_MEMBER( ct486_state::cs4031_ior ) { if (offset < 4) return m_isabus->dack_r(offset); else return m_isabus->dack16_r(offset); } WRITE16_MEMBER( ct486_state::cs4031_iow ) { if (offset < 4) m_isabus->dack_w(offset, data); else m_isabus->dack16_w(offset, data); } WRITE_LINE_MEMBER( ct486_state::cs4031_hold ) { // halt cpu m_maincpu->set_input_line(INPUT_LINE_HALT, state ? ASSERT_LINE : CLEAR_LINE); // and acknowledge hold m_cs4031->hlda_w(state); } //************************************************************************** // ADDRESS MAPS //************************************************************************** void ct486_state::ct486_map(address_map &map) { } void ct486_state::ct486_io(address_map &map) { map.unmap_value_high(); } //************************************************************************** // MACHINE DRIVERS //************************************************************************** void ct486_state::ct486(machine_config &config) { I486(config, m_maincpu, XTAL(25'000'000)); m_maincpu->set_addrmap(AS_PROGRAM, &ct486_state::ct486_map); m_maincpu->set_addrmap(AS_IO, &ct486_state::ct486_io); m_maincpu->set_irq_acknowledge_callback("cs4031", FUNC(cs4031_device::int_ack_r)); CS4031(config, m_cs4031, XTAL(25'000'000), "maincpu", "isa", "bios", "keybc"); // cpu connections m_cs4031->hold().set(FUNC(ct486_state::cs4031_hold)); m_cs4031->nmi().set_inputline("maincpu", INPUT_LINE_NMI); m_cs4031->intr().set_inputline("maincpu", INPUT_LINE_IRQ0); m_cs4031->cpureset().set_inputline("maincpu", INPUT_LINE_RESET); m_cs4031->a20m().set_inputline("maincpu", INPUT_LINE_A20); // isa dma m_cs4031->ior().set(FUNC(ct486_state::cs4031_ior)); m_cs4031->iow().set(FUNC(ct486_state::cs4031_iow)); m_cs4031->tc().set(FUNC(ct486_state::cs4031_tc)); // speaker m_cs4031->spkr().set(FUNC(ct486_state::cs4031_spkr)); RAM(config, RAM_TAG).set_default_size("4M").set_extra_options("1M,2M,8M,16M,32M,64M"); at_kbc_device_base &keybc(AT_KEYBOARD_CONTROLLER(config, "keybc", XTAL(12'000'000))); keybc.hot_res().set("cs4031", FUNC(cs4031_device::kbrst_w)); keybc.gate_a20().set("cs4031", FUNC(cs4031_device::gatea20_w)); keybc.kbd_irq().set("cs4031", FUNC(cs4031_device::irq01_w)); keybc.kbd_clk().set("pc_kbdc", FUNC(pc_kbdc_device::clock_write_from_mb)); keybc.kbd_data().set("pc_kbdc", FUNC(pc_kbdc_device::data_write_from_mb)); pc_kbdc_device &pc_kbdc(PC_KBDC(config, "pc_kbdc", 0)); pc_kbdc.out_clock_cb().set(keybc, FUNC(at_kbc_device_base::kbd_clk_w)); pc_kbdc.out_data_cb().set(keybc, FUNC(at_kbc_device_base::kbd_data_w)); PC_KBDC_SLOT(config, "kbd", pc_at_keyboards, STR_KBD_MICROSOFT_NATURAL).set_pc_kbdc_slot(&pc_kbdc); ISA16(config, m_isabus, 0); m_isabus->set_memspace(m_maincpu, AS_PROGRAM); m_isabus->set_iospace(m_maincpu, AS_IO); m_isabus->iochck_callback().set(m_cs4031, FUNC(cs4031_device::iochck_w)); m_isabus->irq2_callback().set(m_cs4031, FUNC(cs4031_device::irq09_w)); m_isabus->irq3_callback().set(m_cs4031, FUNC(cs4031_device::irq03_w)); m_isabus->irq4_callback().set(m_cs4031, FUNC(cs4031_device::irq04_w)); m_isabus->irq5_callback().set(m_cs4031, FUNC(cs4031_device::irq05_w)); m_isabus->irq6_callback().set(m_cs4031, FUNC(cs4031_device::irq06_w)); m_isabus->irq7_callback().set(m_cs4031, FUNC(cs4031_device::irq07_w)); m_isabus->irq10_callback().set(m_cs4031, FUNC(cs4031_device::irq10_w)); m_isabus->irq11_callback().set(m_cs4031, FUNC(cs4031_device::irq11_w)); m_isabus->irq12_callback().set(m_cs4031, FUNC(cs4031_device::irq12_w)); m_isabus->irq14_callback().set(m_cs4031, FUNC(cs4031_device::irq14_w)); m_isabus->irq15_callback().set(m_cs4031, FUNC(cs4031_device::irq15_w)); m_isabus->drq0_callback().set(m_cs4031, FUNC(cs4031_device::dreq0_w)); m_isabus->drq1_callback().set(m_cs4031, FUNC(cs4031_device::dreq1_w)); m_isabus->drq2_callback().set(m_cs4031, FUNC(cs4031_device::dreq2_w)); m_isabus->drq3_callback().set(m_cs4031, FUNC(cs4031_device::dreq3_w)); m_isabus->drq5_callback().set(m_cs4031, FUNC(cs4031_device::dreq5_w)); m_isabus->drq6_callback().set(m_cs4031, FUNC(cs4031_device::dreq6_w)); m_isabus->drq7_callback().set(m_cs4031, FUNC(cs4031_device::dreq7_w)); ISA16_SLOT(config, "board1", 0, "isabus", pc_isa16_cards, "fdcsmc", true); ISA16_SLOT(config, "board2", 0, "isabus", pc_isa16_cards, "comat", true); ISA16_SLOT(config, "board3", 0, "isabus", pc_isa16_cards, "ide", true); ISA16_SLOT(config, "board4", 0, "isabus", pc_isa16_cards, "lpt", true); ISA16_SLOT(config, "isa1", 0, "isabus", pc_isa16_cards, "svga_et4k", false); ISA16_SLOT(config, "isa2", 0, "isabus", pc_isa16_cards, nullptr, false); ISA16_SLOT(config, "isa3", 0, "isabus", pc_isa16_cards, nullptr, false); ISA16_SLOT(config, "isa4", 0, "isabus", pc_isa16_cards, nullptr, false); ISA16_SLOT(config, "isa5", 0, "isabus", pc_isa16_cards, nullptr, false); // sound hardware SPEAKER(config, "mono").front_center(); SPEAKER_SOUND(config, m_speaker).add_route(ALL_OUTPUTS, "mono", 0.50); // video hardware PALETTE(config, "palette").set_entries(256); // todo: really needed? /* software lists */ SOFTWARE_LIST(config, "pc_disk_list").set_original("ibm5150"); SOFTWARE_LIST(config, "at_disk_list").set_original("ibm5170"); SOFTWARE_LIST(config, "at_cdrom_list").set_original("ibm5170_cdrom"); SOFTWARE_LIST(config, "midi_disk_list").set_compatible("midi_flop"); } //************************************************************************** // ROM DEFINITIONS //************************************************************************** ROM_START( ct486 ) ROM_REGION(0x40000, "isa", ROMREGION_ERASEFF) ROM_REGION(0x100000, "bios", 0) ROM_LOAD("chips_1.ami", 0xf0000, 0x10000, CRC(a14a7511) SHA1(b88d09be66905ed2deddc26a6f8522e7d2d6f9a8)) ROM_END //************************************************************************** // GAME DRIVERS //************************************************************************** COMP( 1993, ct486, 0, 0, ct486, 0, ct486_state, empty_init, "", "PC/AT 486 with CS4031 chipset", 0 )