// License: BSD-3-Clause // copyright-holders:Carl // Altos 486, very incomplete #include "emu.h" #include "cpu/i86/i186.h" #include "cpu/z80/z80.h" #include "imagedev/floppy.h" #include "machine/i8255.h" #include "machine/pic8259.h" #include "machine/z80sio.h" #include "machine/pit8253.h" #include "machine/upd765.h" #include "machine/i8255.h" #include "bus/rs232/rs232.h" class altos486_state : public driver_device { public: altos486_state(const machine_config &mconfig, device_type type, const char *tag) : driver_device(mconfig, type, tag), m_maincpu(*this, "maincpu"), m_ram(*this, "main_ram"), m_rom(*this, "bios") { } void altos486(machine_config &config); private: uint8_t read_rmx_ack(offs_t offset); uint16_t mmu_ram_r(offs_t offset); uint16_t mmu_io_r(offs_t offset); void mmu_ram_w(offs_t offset, uint16_t data); void mmu_io_w(offs_t offset, uint16_t data, uint16_t mem_mask = ~0); DECLARE_FLOPPY_FORMATS(floppy_formats); void altos486_io(address_map &map); void altos486_mem(address_map &map); void altos486_z80_io(address_map &map); void altos486_z80_mem(address_map &map); required_device m_maincpu; required_shared_ptr m_ram; required_memory_region m_rom; bool m_sys_mode; uint8_t m_prot[256]; }; uint8_t altos486_state::read_rmx_ack(offs_t offset) { if(offset == 4) return m_maincpu->int_callback(*this, 0); return 0; } uint16_t altos486_state::mmu_ram_r(offs_t offset) { if (offset < 0x7e000) return m_ram[offset]; // TODO else return m_rom->as_u16(offset - 0x7e000); } uint16_t altos486_state::mmu_io_r(offs_t offset) { if (!m_sys_mode) { m_maincpu->set_input_line(INPUT_LINE_NMI, ASSERT_LINE); return 0; } if(offset < 0x100) return m_prot[offset]; return 0; // TODO } void altos486_state::mmu_ram_w(offs_t offset, uint16_t data) { //uint16_t entry = m_prot[offset >> 11]; //if(!m_sys_mode) } void altos486_state::mmu_io_w(offs_t offset, uint16_t data, uint16_t mem_mask) { if(!m_sys_mode) { m_maincpu->set_input_line(INPUT_LINE_NMI, ASSERT_LINE); return; } if(offset < 0x100) { if(mem_mask != 0xff00) m_prot[offset] = data & 0xf; } } FLOPPY_FORMATS_MEMBER( altos486_state::floppy_formats ) FLOPPY_TD0_FORMAT FLOPPY_FORMATS_END static void altos486_floppies(device_slot_interface &device) { device.option_add("525qd", FLOPPY_525_QD); } void altos486_state::altos486_mem(address_map &map) { map.unmap_value_high(); map(0x00000, 0xfffff).rw(FUNC(altos486_state::mmu_ram_r), FUNC(altos486_state::mmu_ram_w)).share("main_ram"); } void altos486_state::altos486_io(address_map &map) { map(0x0000, 0xffff).rw(FUNC(altos486_state::mmu_io_r), FUNC(altos486_state::mmu_io_w)); } void altos486_state::altos486_z80_mem(address_map &map) { map.unmap_value_high(); map(0x0000, 0x0fff).rom().region("iocpu", 0); map(0x1000, 0x17ff).ram(); //map(0x8000, 0xffff).rw(FUNC(altos486_state::z80_shared_r), FUNC(altos486_state::z80_shared_w)): } void altos486_state::altos486_z80_io(address_map &map) { //map(0x00, 0x03).rw("sio0", FUNC(z80sio_device::read), FUNC(z80sio_device::write)); //map(0x04, 0x07).rw("sio1", FUNC(z80sio_device::read), FUNC(z80sio_device::write)); //map(0x08, 0x0b).rw("sio2", FUNC(z80sio_device::read), FUNC(z80sio_device::write)); } void altos486_state::altos486(machine_config &config) { I80186(config, m_maincpu, 32_MHz_XTAL / 2); // divided by 2 externally and by 2 again internally to operate at 8 MHz m_maincpu->set_addrmap(AS_PROGRAM, &altos486_state::altos486_mem); m_maincpu->set_addrmap(AS_IO, &altos486_state::altos486_io); m_maincpu->set_irq_acknowledge_callback("pic8259", FUNC(pic8259_device::inta_cb)); // yes, really z80_device &iocpu(Z80(config, "iocpu", 32_MHz_XTAL / 8)); iocpu.set_addrmap(AS_PROGRAM, &altos486_state::altos486_z80_mem); iocpu.set_addrmap(AS_IO, &altos486_state::altos486_z80_io); pic8259_device &pic8259(PIC8259(config, "pic8259", 0)); pic8259.out_int_callback().set(m_maincpu, FUNC(i80186_cpu_device::int0_w)); pic8259.in_sp_callback().set_constant(1); pic8259.read_slave_ack_callback().set(FUNC(altos486_state::read_rmx_ack)); I8255(config, "ppi8255"); UPD765A(config, "fdc", 32_MHz_XTAL / 4, false, false); FLOPPY_CONNECTOR(config, "fdc:0", altos486_floppies, "525qd", altos486_state::floppy_formats).set_fixed(true); z80sio_device& sio0(Z80SIO(config, "sio0", 32_MHz_XTAL / 8)); // Z8440APS sio0.out_txda_callback().set("rs232a", FUNC(rs232_port_device::write_txd)); sio0.out_dtra_callback().set("rs232a", FUNC(rs232_port_device::write_dtr)); sio0.out_rtsa_callback().set("rs232a", FUNC(rs232_port_device::write_rts)); sio0.out_txdb_callback().set("rs232b", FUNC(rs232_port_device::write_txd)); sio0.out_dtrb_callback().set("rs232b", FUNC(rs232_port_device::write_dtr)); sio0.out_rtsb_callback().set("rs232b", FUNC(rs232_port_device::write_rts)); //sio0.out_int_callback().set(FUNC(altos486_state::sio_interrupt)); z80sio_device& sio1(Z80SIO(config, "sio1", 32_MHz_XTAL / 8)); // Z8440APS sio1.out_txda_callback().set("rs232c", FUNC(rs232_port_device::write_txd)); sio1.out_dtra_callback().set("rs232c", FUNC(rs232_port_device::write_dtr)); sio1.out_rtsa_callback().set("rs232c", FUNC(rs232_port_device::write_rts)); sio1.out_txdb_callback().set("rs232d", FUNC(rs232_port_device::write_txd)); sio1.out_dtrb_callback().set("rs232d", FUNC(rs232_port_device::write_dtr)); sio1.out_rtsb_callback().set("rs232d", FUNC(rs232_port_device::write_rts)); //sio1.out_int_callback().set(FUNC(altos486_state::sio_interrupt)); z80sio_device& sio2(Z80SIO(config, "sio2", 32_MHz_XTAL / 8)); // Z8440APS sio2.out_txda_callback().set("rs232_lp", FUNC(rs232_port_device::write_txd)); sio2.out_dtra_callback().set("rs232_lp", FUNC(rs232_port_device::write_dtr)); sio2.out_rtsa_callback().set("rs232_lp", FUNC(rs232_port_device::write_rts)); //sio2.out_int_callback().set(FUNC(altos486_state::sio_interrupt)); i8274_device& i8274(I8274(config, "i8274", 32_MHz_XTAL / 8)); i8274.out_txda_callback().set("rs422_wn", FUNC(rs232_port_device::write_txd)); i8274.out_dtra_callback().set("rs422_wn", FUNC(rs232_port_device::write_dtr)); i8274.out_rtsa_callback().set("rs422_wn", FUNC(rs232_port_device::write_rts)); //i8274.out_int_callback().set(FUNC(altos486_state::sio_interrupt)); rs232_port_device &rs232a(RS232_PORT(config, "rs232a", default_rs232_devices, "terminal")); rs232a.rxd_handler().set("sio0", FUNC(z80sio_device::rxa_w)); rs232a.dcd_handler().set("sio0", FUNC(z80sio_device::dcda_w)); rs232a.cts_handler().set("sio0", FUNC(z80sio_device::ctsa_w)); //rs232a.set_option_device_input_defaults("terminal", DEVICE_INPUT_DEFAULTS_NAME(altos486_terminal)); rs232_port_device &rs232b(RS232_PORT(config, "rs232b", default_rs232_devices, nullptr)); rs232b.rxd_handler().set("sio0", FUNC(z80sio_device::rxb_w)); rs232b.dcd_handler().set("sio0", FUNC(z80sio_device::dcdb_w)); rs232b.cts_handler().set("sio0", FUNC(z80sio_device::ctsb_w)); rs232_port_device &rs232c(RS232_PORT(config, "rs232c", default_rs232_devices, nullptr)); rs232c.rxd_handler().set("sio1", FUNC(z80sio_device::rxa_w)); rs232c.dcd_handler().set("sio1", FUNC(z80sio_device::dcda_w)); rs232c.cts_handler().set("sio1", FUNC(z80sio_device::ctsa_w)); rs232_port_device &rs232d(RS232_PORT(config, "rs232d", default_rs232_devices, nullptr)); rs232d.rxd_handler().set("sio1", FUNC(z80sio_device::rxb_w)); rs232d.dcd_handler().set("sio1", FUNC(z80sio_device::dcdb_w)); rs232d.cts_handler().set("sio1", FUNC(z80sio_device::ctsb_w)); rs232_port_device &rs232_lp(RS232_PORT(config, "rs232_lp", default_rs232_devices, nullptr)); rs232_lp.rxd_handler().set("sio2", FUNC(z80sio_device::rxa_w)); rs232_lp.dcd_handler().set("sio2", FUNC(z80sio_device::dcda_w)); rs232_lp.cts_handler().set("sio2", FUNC(z80sio_device::ctsa_w)); rs232_port_device &rs422_wn(RS232_PORT(config, "rs422_wn", default_rs232_devices, nullptr)); rs422_wn.rxd_handler().set("i8274", FUNC(i8274_device::rxa_w)); rs422_wn.dcd_handler().set("i8274", FUNC(i8274_device::dcda_w)); rs422_wn.cts_handler().set("i8274", FUNC(i8274_device::ctsa_w)); pit8253_device &pit0(PIT8253(config, "pit0", 0)); pit0.set_clk<0>(XTAL(22'118'400)/18); // FIXME pit0.set_clk<1>(XTAL(22'118'400)/144); // FIXME pit0.set_clk<2>(XTAL(22'118'400)/18); // FIXME pit8253_device &pit1(PIT8253(config, "pit1", 0)); pit1.set_clk<0>(XTAL(22'118'400)/18); // FIXME pit1.set_clk<1>(XTAL(22'118'400)/144); // FIXME pit1.set_clk<2>(XTAL(22'118'400)/18); // FIXME } ROM_START( altos486 ) ROM_REGION( 0x4000, "bios", ROMREGION_ERASEFF ) ROM_SYSTEM_BIOS( 0, "v11", "Altos 486 v1.1") ROMX_LOAD("16577_lo_v1.1.bin", 0x0000, 0x2000, CRC(65a9db18) SHA1(3ac2b87f1fc0b28ed4907c9b4091aaa170609674), ROM_SKIP(1) | ROM_BIOS(0)) ROMX_LOAD("16576_hi_v1.1.bin", 0x0001, 0x2000, CRC(cea4cd8d) SHA1(f9f49828bd5e3281bd7cc34d4460ca1b677530b0), ROM_SKIP(1) | ROM_BIOS(0)) ROM_SYSTEM_BIOS( 1, "v12", "Altos 486 v1.2") ROMX_LOAD("16577-003_4d_v1.2.bin", 0x0000, 0x2000, CRC(e2ac806b) SHA1(9b358246e26b3e85a6dff418899a180370884537), ROM_SKIP(1) | ROM_BIOS(1)) ROMX_LOAD("16576-003_3d_v1.2.bin", 0x0001, 0x2000, CRC(912f4c12) SHA1(df5088e8610513b577926b0c752e3b54bc880167), ROM_SKIP(1) | ROM_BIOS(1)) ROM_REGION( 0x1000, "iocpu", 0 ) ROM_LOAD("16019_z80.bin", 0x0000, 0x1000, CRC(68b1b2e1) SHA1(5d83609a465029212d5e3f72ac9c520b3dbed838)) ROM_REGION( 0x0020, "proms", 0 ) ROM_LOAD( "15020.bin", 0x0000, 0x0020, CRC(6a2bd961) SHA1(e9a9ed235574c9871dc32a80ff5ca4df6bd531e1) ) ROM_END COMP( 1984, altos486, 0, 0, altos486, 0, altos486_state, empty_init, "Altos Computer Systems", "Altos 486", MACHINE_NOT_WORKING | MACHINE_NO_SOUND)