// 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 "machine/i8255.h" #include "machine/pic8259.h" #include "machine/z80dart.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") { } required_device m_maincpu; required_shared_ptr m_ram; required_memory_region m_rom; DECLARE_READ8_MEMBER(read_rmx_ack); DECLARE_READ16_MEMBER(mmu_ram_r); DECLARE_READ16_MEMBER(mmu_io_r); DECLARE_WRITE16_MEMBER(mmu_ram_w); DECLARE_WRITE16_MEMBER(mmu_io_w); DECLARE_FLOPPY_FORMATS(floppy_formats); bool m_sys_mode; UINT8 m_prot[256]; UINT16 m_viol[16]; }; READ8_MEMBER(altos486_state::read_rmx_ack) { if(offset == 4) return m_maincpu->int_callback(*this, 0); return 0; } READ16_MEMBER(altos486_state::mmu_ram_r) { if(offset < 0x7e000) return m_ram[offset]; // TODO else return m_rom->u16(offset - 0x7e000); } READ16_MEMBER(altos486_state::mmu_io_r) { 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 } WRITE16_MEMBER(altos486_state::mmu_ram_w) { //UINT16 entry = m_prot[offset >> 11]; //if(!m_sys_mode) } WRITE16_MEMBER(altos486_state::mmu_io_w) { 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 SLOT_INTERFACE_START( altos486_floppies ) SLOT_INTERFACE( "525qd", FLOPPY_525_QD ) SLOT_INTERFACE_END static ADDRESS_MAP_START(altos486_mem, AS_PROGRAM, 16, altos486_state) ADDRESS_MAP_UNMAP_HIGH AM_RANGE(0x00000, 0xfffff) AM_READWRITE(mmu_ram_r, mmu_ram_w) AM_SHARE("main_ram") ADDRESS_MAP_END static ADDRESS_MAP_START(altos486_io, AS_IO, 16, altos486_state) AM_RANGE(0x0000, 0xffff) AM_READWRITE(mmu_io_r, mmu_io_w) ADDRESS_MAP_END static ADDRESS_MAP_START(altos486_z80_mem, AS_PROGRAM, 8, altos486_state) ADDRESS_MAP_UNMAP_HIGH AM_RANGE(0x0000, 0x0fff) AM_ROM AM_REGION("iocpu", 0) AM_RANGE(0x2000, 0x27ff) AM_RAM //AM_RANGE(0x8000, 0xffff) AM_READWRITE(z80_shared_r, z80_shared_w) ADDRESS_MAP_END static ADDRESS_MAP_START(altos486_z80_io, AS_IO, 8, altos486_state) //AM_RANGE(0x00, 0x03) AM_DEVREADWRITE("sio0", z80sio0_device, read, write) //AM_RANGE(0x04, 0x07) AM_DEVREADWRITE("sio1", z80sio0_device, read, write) //AM_RANGE(0x08, 0x0b) AM_DEVREADWRITE("sio2", z80sio0_device, read, write) ADDRESS_MAP_END static MACHINE_CONFIG_START( altos486, altos486_state ) MCFG_CPU_ADD("maincpu", I80186, XTAL_8MHz) MCFG_CPU_PROGRAM_MAP(altos486_mem) MCFG_CPU_IO_MAP(altos486_io) MCFG_CPU_IRQ_ACKNOWLEDGE_DEVICE("pic8259", pic8259_device, inta_cb) // yes, really MCFG_CPU_ADD("iocpu", Z80, XTAL_8MHz / 2) MCFG_CPU_PROGRAM_MAP(altos486_z80_mem) MCFG_CPU_IO_MAP(altos486_z80_io) MCFG_PIC8259_ADD("pic8259", DEVWRITELINE("maincpu", i80186_cpu_device, int0_w), VCC, READ8(altos486_state, read_rmx_ack)) MCFG_DEVICE_ADD("ppi8255", I8255, 0) MCFG_UPD765A_ADD("fdc", false, false) MCFG_FLOPPY_DRIVE_ADD("fdc:0", altos486_floppies, "525qd", altos486_state::floppy_formats) MCFG_SLOT_FIXED(true) MCFG_Z80SIO0_ADD("sio0", 4000000, 0, 0, 0, 0) MCFG_Z80DART_OUT_TXDA_CB(DEVWRITELINE("rs232a", rs232_port_device, write_txd)) MCFG_Z80DART_OUT_DTRA_CB(DEVWRITELINE("rs232a", rs232_port_device, write_dtr)) MCFG_Z80DART_OUT_RTSA_CB(DEVWRITELINE("rs232a", rs232_port_device, write_rts)) MCFG_Z80DART_OUT_TXDB_CB(DEVWRITELINE("rs232b", rs232_port_device, write_txd)) MCFG_Z80DART_OUT_DTRB_CB(DEVWRITELINE("rs232b", rs232_port_device, write_dtr)) MCFG_Z80DART_OUT_RTSB_CB(DEVWRITELINE("rs232b", rs232_port_device, write_rts)) //MCFG_Z80DART_OUT_INT_CB(WRITELINE(altos486_state, sio_interrupt)) MCFG_Z80SIO0_ADD("sio1", 4000000, 0, 0, 0, 0) MCFG_Z80DART_OUT_TXDA_CB(DEVWRITELINE("rs232c", rs232_port_device, write_txd)) MCFG_Z80DART_OUT_DTRA_CB(DEVWRITELINE("rs232c", rs232_port_device, write_dtr)) MCFG_Z80DART_OUT_RTSA_CB(DEVWRITELINE("rs232c", rs232_port_device, write_rts)) MCFG_Z80DART_OUT_TXDB_CB(DEVWRITELINE("rs232d", rs232_port_device, write_txd)) MCFG_Z80DART_OUT_DTRB_CB(DEVWRITELINE("rs232d", rs232_port_device, write_dtr)) MCFG_Z80DART_OUT_RTSB_CB(DEVWRITELINE("rs232d", rs232_port_device, write_rts)) //MCFG_Z80DART_OUT_INT_CB(WRITELINE(altos486_state, sio_interrupt)) MCFG_Z80SIO0_ADD("sio2", 4000000, 0, 0, 0, 0) MCFG_Z80DART_OUT_TXDA_CB(DEVWRITELINE("rs232_lp", rs232_port_device, write_txd)) MCFG_Z80DART_OUT_DTRA_CB(DEVWRITELINE("rs232_lp", rs232_port_device, write_dtr)) MCFG_Z80DART_OUT_RTSA_CB(DEVWRITELINE("rs232_lp", rs232_port_device, write_rts)) //MCFG_Z80DART_OUT_INT_CB(WRITELINE(altos486_state, sio_interrupt)) MCFG_I8274_ADD("i8274", XTAL_16MHz/4, 0, 0, 0, 0) MCFG_Z80DART_OUT_TXDA_CB(DEVWRITELINE("rs422_wn", rs232_port_device, write_txd)) MCFG_Z80DART_OUT_DTRA_CB(DEVWRITELINE("rs422_wn", rs232_port_device, write_dtr)) MCFG_Z80DART_OUT_RTSA_CB(DEVWRITELINE("rs422_wn", rs232_port_device, write_rts)) //MCFG_Z80DART_OUT_INT_CB(WRITELINE(altos486_state, sio_interrupt)) MCFG_RS232_PORT_ADD("rs232a", default_rs232_devices, "terminal") MCFG_RS232_RXD_HANDLER(DEVWRITELINE("sio0", z80dart_device, rxa_w)) MCFG_RS232_DCD_HANDLER(DEVWRITELINE("sio0", z80dart_device, dcda_w)) MCFG_RS232_CTS_HANDLER(DEVWRITELINE("sio0", z80dart_device, ctsa_w)) //MCFG_DEVICE_CARD_DEVICE_INPUT_DEFAULTS("terminal", altos486_terminal) MCFG_RS232_PORT_ADD("rs232b", default_rs232_devices, NULL) MCFG_RS232_RXD_HANDLER(DEVWRITELINE("sio0", z80dart_device, rxb_w)) MCFG_RS232_DCD_HANDLER(DEVWRITELINE("sio0", z80dart_device, dcdb_w)) MCFG_RS232_CTS_HANDLER(DEVWRITELINE("sio0", z80dart_device, ctsb_w)) MCFG_RS232_PORT_ADD("rs232c", default_rs232_devices, NULL) MCFG_RS232_RXD_HANDLER(DEVWRITELINE("sio1", z80dart_device, rxa_w)) MCFG_RS232_DCD_HANDLER(DEVWRITELINE("sio1", z80dart_device, dcda_w)) MCFG_RS232_CTS_HANDLER(DEVWRITELINE("sio1", z80dart_device, ctsa_w)) MCFG_RS232_PORT_ADD("rs232d", default_rs232_devices, NULL) MCFG_RS232_RXD_HANDLER(DEVWRITELINE("sio1", z80dart_device, rxb_w)) MCFG_RS232_DCD_HANDLER(DEVWRITELINE("sio1", z80dart_device, dcdb_w)) MCFG_RS232_CTS_HANDLER(DEVWRITELINE("sio1", z80dart_device, ctsb_w)) MCFG_RS232_PORT_ADD("rs232_lp", default_rs232_devices, NULL) MCFG_RS232_RXD_HANDLER(DEVWRITELINE("sio2", z80dart_device, rxa_w)) MCFG_RS232_DCD_HANDLER(DEVWRITELINE("sio2", z80dart_device, dcda_w)) MCFG_RS232_CTS_HANDLER(DEVWRITELINE("sio2", z80dart_device, ctsa_w)) MCFG_RS232_PORT_ADD("rs422_wn", default_rs232_devices, NULL) MCFG_RS232_RXD_HANDLER(DEVWRITELINE("i8274", z80dart_device, rxa_w)) MCFG_RS232_DCD_HANDLER(DEVWRITELINE("i8274", z80dart_device, dcda_w)) MCFG_RS232_CTS_HANDLER(DEVWRITELINE("i8274", z80dart_device, ctsa_w)) MCFG_DEVICE_ADD("pit0", PIT8253, 0) MCFG_PIT8253_CLK0(XTAL_22_1184MHz/18) MCFG_PIT8253_CLK1(XTAL_22_1184MHz/144) MCFG_PIT8253_CLK2(XTAL_22_1184MHz/18) MCFG_DEVICE_ADD("pit1", PIT8253, 0) MCFG_PIT8253_CLK0(XTAL_22_1184MHz/18) MCFG_PIT8253_CLK1(XTAL_22_1184MHz/144) MCFG_PIT8253_CLK2(XTAL_22_1184MHz/18) MACHINE_CONFIG_END 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(1)) ROMX_LOAD("16576_hi_v1.1.bin", 0x0001, 0x2000, CRC(cea4cd8d) SHA1(f9f49828bd5e3281bd7cc34d4460ca1b677530b0), ROM_SKIP(1) | ROM_BIOS(1)) 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(2)) ROMX_LOAD("16576-003_3D_v1.2.bin", 0x0001, 0x2000, CRC(912f4c12) SHA1(df5088e8610513b577926b0c752e3b54bc880167), ROM_SKIP(1) | ROM_BIOS(2)) ROM_REGION( 0x1000, "iocpu", 0 ) ROM_LOAD("16019_z80.bin", 0x0000, 0x1000, CRC(68b1b2e1) SHA1(5d83609a465029212d5e3f72ac9c520b3dbed838)) ROM_END COMP( 1984, altos486, 0, 0, altos486, 0, driver_device, 0, "Altos Computer Systems", "Altos 486", MACHINE_NOT_WORKING | MACHINE_NO_SOUND)