// license:BSD-3-Clause // copyright-holders:Miodrag Milanovic /*************************************************************************** NorthStar Horizon 2009-12-07 Skeleton driver. http://www.hartetechnologies.com/manuals/Northstar/ The tiny bios (only about 200 bytes) initialises nothing, but only loads the initial sector from the disk and transfers control to it. All the used memory locations in the EA00-EB40 range are listed in the memory map. It does not use the IO map, and has no text. The 2MHz downgrade is suggested in the manual for the CPU board (ZPB-A). It involves replacing the XTAL and reconnecting one jumper. ****************************************************************************/ /* TODO: - connect to S-100 bus - USARTs - parallel I/O - motherboard ports - RTC - RAM boards - floppy boards - floating point board - SOROC IQ 120 CRT terminal - NEC 5530-2 SPINWRITER printer - Anadex DP-8000 printer */ #include "emu.h" #include "bus/rs232/rs232.h" #include "bus/s100/s100.h" #include "cpu/z80/z80.h" #include "machine/i8251.h" #include "softlist.h" #define Z80_TAG "z80" #define I8251_L_TAG "3a" #define I8251_R_TAG "4a" #define RS232_A_TAG "rs232a" #define RS232_B_TAG "rs232b" class horizon_state : public driver_device { public: horizon_state(const machine_config &mconfig, device_type type, const char *tag) : driver_device(mconfig, type, tag) , m_maincpu(*this, Z80_TAG) , m_usart_l(*this, I8251_L_TAG) , m_usart_r(*this, I8251_R_TAG) { } DECLARE_READ8_MEMBER(ff_r); void horizon(machine_config &config); void horizon2mhz(machine_config &config); void horizon_io(address_map &map); void horizon_mem(address_map &map); private: virtual void machine_reset() override; required_device m_maincpu; required_device m_usart_l; required_device m_usart_r; }; //************************************************************************** // ADDRESS MAPS //************************************************************************** //------------------------------------------------- // ADDRESS_MAP( horizon_mem ) //------------------------------------------------- void horizon_state::horizon_mem(address_map &map) { map(0x0000, 0xe7ff).ram(); map(0xe800, 0xe9ff).rom().region("roms", 0); map(0xea01, 0xea01); map(0xea11, 0xea11); map(0xea21, 0xea21); map(0xea31, 0xea31); map(0xeb10, 0xeb17).r(this, FUNC(horizon_state::ff_r)); map(0xeb20, 0xeb20); map(0xeb35, 0xeb35); map(0xeb40, 0xeb40); } //------------------------------------------------- // ADDRESS_MAP( horizon_io ) //------------------------------------------------- void horizon_state::horizon_io(address_map &map) { } //************************************************************************** // INPUT PORTS //************************************************************************** //------------------------------------------------- // INPUT_PORTS //------------------------------------------------- static INPUT_PORTS_START( horizon ) INPUT_PORTS_END void horizon_state::machine_reset() { m_maincpu->set_pc(0xe800); } READ8_MEMBER( horizon_state::ff_r ) { return 0xff; } //************************************************************************** // DEVICE CONFIGURATION //************************************************************************** static DEVICE_INPUT_DEFAULTS_START( terminal ) DEVICE_INPUT_DEFAULTS( "RS232_TXBAUD", 0xff, RS232_BAUD_9600 ) DEVICE_INPUT_DEFAULTS( "RS232_RXBAUD", 0xff, RS232_BAUD_9600 ) DEVICE_INPUT_DEFAULTS( "RS232_STARTBITS", 0xff, RS232_STARTBITS_1 ) DEVICE_INPUT_DEFAULTS( "RS232_DATABITS", 0xff, RS232_DATABITS_8 ) DEVICE_INPUT_DEFAULTS( "RS232_PARITY", 0xff, RS232_PARITY_NONE ) DEVICE_INPUT_DEFAULTS( "RS232_STOPBITS", 0xff, RS232_STOPBITS_1 ) DEVICE_INPUT_DEFAULTS_END //------------------------------------------------- // S100_INTERFACE( s100_intf ) //------------------------------------------------- // slot devices //#include "bus/s100/dj2db.h" //#include "bus/s100/djdma.h" //#include "bus/s100/mm65k16s.h" #include "bus/s100/nsmdsa.h" #include "bus/s100/nsmdsad.h" #include "bus/s100/seals8k.h" //#include "bus/s100/wunderbus.h" static void horizon_s100_cards(device_slot_interface &device) { device.option_add("mdsa", S100_MDS_A); device.option_add("mdsad", S100_MDS_AD); //device.option_add("hram", S100_HRAM); //device.option_add("ram32a", S100_RAM32A); //device.option_add("ram16a", S100_RAM16A); //device.option_add("fpb", S100_FPB); device.option_add("8ksc", S100_8K_SC); device.option_add("8kscbb", S100_8K_SC_BB); } //************************************************************************** // MACHINE DRIVERS //************************************************************************** //------------------------------------------------- // MACHINE_CONFIG( horizon ) //------------------------------------------------- MACHINE_CONFIG_START(horizon_state::horizon) // basic machine hardware MCFG_DEVICE_ADD(Z80_TAG, Z80, XTAL(8'000'000) / 2) MCFG_DEVICE_PROGRAM_MAP(horizon_mem) MCFG_DEVICE_IO_MAP(horizon_io) // devices MCFG_DEVICE_ADD(I8251_L_TAG, I8251, 0) MCFG_I8251_TXD_HANDLER(WRITELINE(RS232_A_TAG, rs232_port_device, write_txd)) MCFG_I8251_DTR_HANDLER(WRITELINE(RS232_A_TAG, rs232_port_device, write_dtr)) MCFG_I8251_RTS_HANDLER(WRITELINE(RS232_A_TAG, rs232_port_device, write_rts)) MCFG_DEVICE_ADD(RS232_A_TAG, RS232_PORT, default_rs232_devices, "terminal") MCFG_RS232_RXD_HANDLER(WRITELINE(I8251_L_TAG, i8251_device, write_rxd)) MCFG_RS232_DSR_HANDLER(WRITELINE(I8251_L_TAG, i8251_device, write_dsr)) MCFG_SLOT_OPTION_DEVICE_INPUT_DEFAULTS("terminal", terminal) MCFG_DEVICE_ADD(I8251_R_TAG, I8251, 0) MCFG_I8251_TXD_HANDLER(WRITELINE(RS232_B_TAG, rs232_port_device, write_txd)) MCFG_I8251_DTR_HANDLER(WRITELINE(RS232_B_TAG, rs232_port_device, write_dtr)) MCFG_I8251_RTS_HANDLER(WRITELINE(RS232_B_TAG, rs232_port_device, write_rts)) MCFG_DEVICE_ADD(RS232_B_TAG, RS232_PORT, default_rs232_devices, nullptr) MCFG_RS232_RXD_HANDLER(WRITELINE(I8251_R_TAG, i8251_device, write_rxd)) MCFG_RS232_DSR_HANDLER(WRITELINE(I8251_R_TAG, i8251_device, write_dsr)) // S-100 MCFG_DEVICE_ADD("s100", S100_BUS, XTAL(8'000'000) / 4) MCFG_S100_RDY_CALLBACK(INPUTLINE(Z80_TAG, Z80_INPUT_LINE_BOGUSWAIT)) //MCFG_S100_SLOT_ADD("s100:1", horizon_s100_cards, nullptr, nullptr) // CPU MCFG_S100_SLOT_ADD("s100:2", horizon_s100_cards, nullptr) // RAM MCFG_S100_SLOT_ADD("s100:3", horizon_s100_cards, "mdsad") // MDS MCFG_S100_SLOT_ADD("s100:4", horizon_s100_cards, nullptr) // FPB MCFG_S100_SLOT_ADD("s100:5", horizon_s100_cards, nullptr) MCFG_S100_SLOT_ADD("s100:6", horizon_s100_cards, nullptr) MCFG_S100_SLOT_ADD("s100:7", horizon_s100_cards, nullptr) MCFG_S100_SLOT_ADD("s100:8", horizon_s100_cards, nullptr) MCFG_S100_SLOT_ADD("s100:9", horizon_s100_cards, nullptr) MCFG_S100_SLOT_ADD("s100:10", horizon_s100_cards, nullptr) MCFG_S100_SLOT_ADD("s100:11", horizon_s100_cards, nullptr) MCFG_S100_SLOT_ADD("s100:12", horizon_s100_cards, nullptr) // software list MCFG_SOFTWARE_LIST_ADD("flop_list", "horizon") MACHINE_CONFIG_END MACHINE_CONFIG_START(horizon_state::horizon2mhz) horizon(config); MCFG_DEVICE_MODIFY("z80") MCFG_DEVICE_CLOCK(XTAL(4'000'000) / 2) MCFG_DEVICE_MODIFY("s100") MCFG_DEVICE_CLOCK(XTAL(4'000'000) / 2) MACHINE_CONFIG_END //************************************************************************** // ROMS //************************************************************************** //------------------------------------------------- // ROM( nshrz ) //------------------------------------------------- ROM_START( nshrz ) ROM_REGION( 0x400, "roms", 0 ) ROM_LOAD( "option.prom", 0x000, 0x400, NO_DUMP ) ROM_END #define rom_nshrz2mhz rom_nshrz //------------------------------------------------- // ROM( vector1 ) //------------------------------------------------- ROM_START( vector1 ) // This one have different I/O ROM_REGION( 0x400, "roms", ROMREGION_ERASEFF ) ROM_LOAD( "horizon.bin", 0x0000, 0x0100, CRC(7aafa134) SHA1(bf1552c4818f30473798af4f54e65e1957e0db48)) ROM_END //************************************************************************** // SYSTEM DRIVERS //************************************************************************** // YEAR NAME PARENT COMPAT MACHINE INPUT CLASS INIT COMPANY FULLNAME FLAGS COMP( 1976, nshrz, 0, 0, horizon, horizon, horizon_state, empty_init, "North Star Computers", "Horizon (North Star Computers, 4MHz)", MACHINE_NOT_WORKING | MACHINE_NO_SOUND_HW ) COMP( 1976, nshrz2mhz, nshrz, 0, horizon2mhz, horizon, horizon_state, empty_init, "North Star Computers", "Horizon (North Star Computers, 2MHz)", MACHINE_NOT_WORKING | MACHINE_NO_SOUND_HW ) // This really should be in its own driver COMP( 1979, vector1, 0, 0, horizon, horizon, horizon_state, empty_init, "Vector Graphic", "Vector 1+ (DD drive)", MACHINE_NOT_WORKING | MACHINE_NO_SOUND_HW )