// license:GPL-2.0+ // copyright-holders:Dirk Best,Paul Danials /****************************************************************************************************** Nascom 1/2/3 Single board computer To Do: - TTY - Nascom2 has two dipswitch banks, and a memory control header - Nascom3 (Gemini), nothing usable found Cassette (nascom1): It outputs a string of pulses at 1953.125Hz to indicate a 1, and blank tape for 0. This means that no tape will present a 0 to the UART instead of the expected 1 (idle). Part of the cassette schematic is missing, so a few liberties have been taken. The result is you can save a file and load it back. Haven't found wav files on the net to test with. Cassette (nascom2): Standard Kansas City format, switchable (with a real switch) between 300 and 1200 baud. *****************************************************************************************************/ #include "emu.h" #include "cpu/z80/z80.h" #include "imagedev/cassette.h" #include "imagedev/snapquik.h" #include "machine/ay31015.h" #include "machine/clock.h" #include "machine/ram.h" #include "machine/z80pio.h" #include "machine/timer.h" #include "speaker.h" #include "bus/generic/slot.h" #include "bus/generic/carts.h" #include "bus/nasbus/nasbus.h" #include "emupal.h" #include "softlist.h" #include "screen.h" //************************************************************************** // TYPE DEFINITIONS //************************************************************************** class nascom_state : public driver_device { public: nascom_state(const machine_config &mconfig, device_type type, const char *tag) : driver_device(mconfig, type, tag) , m_maincpu(*this, "maincpu") , m_ram(*this, RAM_TAG) , m_hd6402(*this, "hd6402") , m_cass(*this, "cassette") , m_screen(*this, "screen") , m_gfxdecode(*this, "gfxdecode") , m_palette(*this, "palette") , m_videoram(*this, "videoram") , m_gfx1_region(*this, "gfx1") , m_keyboard(*this, "KEY.%u", 0) { } void nascom(machine_config &config); void init_nascom(); protected: required_device m_maincpu; required_device m_ram; virtual void machine_reset() override; DECLARE_READ8_MEMBER(nascom1_port_00_r); DECLARE_WRITE8_MEMBER(nascom1_port_00_w); DECLARE_READ8_MEMBER(nascom1_port_01_r); DECLARE_WRITE8_MEMBER(nascom1_port_01_w); DECLARE_READ8_MEMBER(nascom1_port_02_r); DECLARE_READ_LINE_MEMBER(hd6402_si); DECLARE_WRITE_LINE_MEMBER(hd6402_so); void screen_update(bitmap_ind16 &bitmap, const rectangle &cliprect, int char_height); required_device m_hd6402; required_device m_cass; required_device m_screen; required_device m_gfxdecode; required_device m_palette; required_shared_ptr m_videoram; required_memory_region m_gfx1_region; required_ioport_array<8> m_keyboard; int m_tape_size; uint8_t *m_tape_image; int m_tape_index; uint8_t m_kb_select; uint8_t m_kb_control; bool m_cassinbit, m_cassoutbit, m_cassold; u8 m_port00; DECLARE_DEVICE_IMAGE_LOAD_MEMBER( load_nascom1_cassette ); DECLARE_DEVICE_IMAGE_UNLOAD_MEMBER( unload_nascom1_cassette ); template DECLARE_SNAPSHOT_LOAD_MEMBER( snapshot_cb ); }; class nascom1_state : public nascom_state { public: nascom1_state(const machine_config &mconfig, device_type type, const char *tag) : nascom_state(mconfig, type, tag) { } void nascom1(machine_config &config); uint32_t screen_update_nascom(screen_device &screen, bitmap_ind16 &bitmap, const rectangle &cliprect); private: void nascom1_io(address_map &map); void nascom1_mem(address_map &map); TIMER_DEVICE_CALLBACK_MEMBER(nascom1_kansas_r); DECLARE_WRITE_LINE_MEMBER(nascom1_kansas_w); u16 m_cass_cnt[2]; }; class nascom2_state : public nascom_state { public: nascom2_state(const machine_config &mconfig, device_type type, const char *tag) : nascom_state(mconfig, type, tag) , m_clock(*this, "uart_clock") , m_nasbus(*this, "nasbus") , m_socket1(*this, "socket1") , m_socket2(*this, "socket2") , m_lsw1(*this, "lsw1") { } void nascom2(machine_config &config); void nascom2c(machine_config &config); void init_nascom2c(); DECLARE_INPUT_CHANGED_MEMBER(cass_speed); private: TIMER_DEVICE_CALLBACK_MEMBER(nascom2_kansas_r); DECLARE_MACHINE_RESET(nascom2); DECLARE_WRITE_LINE_MEMBER(nascom2_kansas_w); DECLARE_WRITE_LINE_MEMBER(ram_disable_w); DECLARE_WRITE_LINE_MEMBER(ram_disable_cpm_w); uint32_t screen_update_nascom(screen_device &screen, bitmap_ind16 &bitmap, const rectangle &cliprect); image_init_result load_cart(device_image_interface &image, generic_slot_device *slot, int slot_id); DECLARE_DEVICE_IMAGE_LOAD_MEMBER(socket1_load) { return load_cart(image, m_socket1, 1); } DECLARE_DEVICE_IMAGE_LOAD_MEMBER(socket2_load) { return load_cart(image, m_socket2, 2); } void nascom2_io(address_map &map); void nascom2_mem(address_map &map); void nascom2c_mem(address_map &map); required_device m_clock; required_device m_nasbus; required_device m_socket1; required_device m_socket2; required_ioport m_lsw1; u8 m_cass_data[4]; bool m_cass_speed; }; //************************************************************************** // KEYBOARD //************************************************************************** READ8_MEMBER( nascom_state::nascom1_port_00_r ) { return m_keyboard[m_kb_select]->read() | ~0x7f; } WRITE8_MEMBER( nascom_state::nascom1_port_00_w ) { u8 bits = data ^ m_port00; if (BIT(bits, 4)) m_cass->change_state(BIT(data, 4) ? CASSETTE_MOTOR_ENABLED : CASSETTE_MOTOR_DISABLED, CASSETTE_MASK_MOTOR); // d0 falling edge: increment keyboard matrix column select counter if (m_kb_control & ~data & 1) m_kb_select = (m_kb_select + 1) & 7; // d1 falling edge: reset it if (m_kb_control & ~data & 2) m_kb_select = 0; m_kb_control = data & 3; } //************************************************************************** // CASSETTE //************************************************************************** READ8_MEMBER( nascom_state::nascom1_port_01_r ) { return m_hd6402->get_received_data(); } WRITE8_MEMBER( nascom_state::nascom1_port_01_w ) { m_hd6402->set_transmit_data(data); } READ8_MEMBER( nascom_state::nascom1_port_02_r ) { uint8_t data = 0x31; // bits 0,4,5 not used m_hd6402->write_swe(0); data |= m_hd6402->or_r( ) ? 0x02 : 0; data |= m_hd6402->pe_r( ) ? 0x04 : 0; data |= m_hd6402->fe_r( ) ? 0x08 : 0; data |= m_hd6402->tbmt_r() ? 0x40 : 0; data |= m_hd6402->dav_r( ) ? 0x80 : 0; m_hd6402->write_swe(1); return data; } READ_LINE_MEMBER( nascom_state::hd6402_si ) { return m_cassinbit; } WRITE_LINE_MEMBER( nascom_state::hd6402_so ) { m_cassoutbit = state; } WRITE_LINE_MEMBER( nascom1_state::nascom1_kansas_w ) { // incoming 3906.25Hz if (state) { if (m_cassoutbit) m_cass->output(BIT(m_cass_cnt[0], 0) ? -1.0 : +1.0); // 1953.125Hz else m_cass->output(1.0); m_cass_cnt[0]++; } m_hd6402->write_tcp(state); } TIMER_DEVICE_CALLBACK_MEMBER( nascom1_state::nascom1_kansas_r ) { // cassette - pulses = 1; no pulses = 0 m_cass_cnt[1]++; bool cass_ws = (m_cass->input() > +0.04) ? 1 : 0; if (cass_ws != m_cassold) { m_cassold = cass_ws; m_cassinbit = 1; m_cass_cnt[1] = 0; } else if (m_cass_cnt[1] > 10) { m_cass_cnt[1] = 10; m_cassinbit = !cass_ws; } } WRITE_LINE_MEMBER( nascom2_state::nascom2_kansas_w ) { // incoming @19230Hz u8 twobit = m_cass_data[3] & 3; if (state) { if (twobit == 0) m_cassold = m_cassoutbit; if (m_cassold) m_cass->output(BIT(m_cass_data[3], 2) ? -1.0 : +1.0); // 2400Hz else m_cass->output(BIT(m_cass_data[3], 3) ? -1.0 : +1.0); // 1200Hz m_cass_data[3]++; } if (m_cass_speed || !twobit) { m_hd6402->write_tcp(state); m_hd6402->write_rcp(state); } } TIMER_DEVICE_CALLBACK_MEMBER( nascom2_state::nascom2_kansas_r ) { /* cassette - turn 1200/2400Hz to a bit */ m_cass_data[1]++; uint8_t cass_ws = (m_cass->input() > +0.04) ? 1 : 0; if (cass_ws != m_cass_data[0]) { m_cass_data[0] = cass_ws; m_cassinbit = (m_cass_data[1] < 12) ? 1 : 0; m_cass_data[1] = 0; } } // This stuff has never been connected up - what's it for? DEVICE_IMAGE_LOAD_MEMBER( nascom_state::load_nascom1_cassette ) { m_tape_size = image.length(); m_tape_image = (uint8_t*)image.ptr(); if (!m_tape_image) return image_init_result::FAIL; m_tape_index = 0; return image_init_result::PASS; } DEVICE_IMAGE_UNLOAD_MEMBER( nascom_state::unload_nascom1_cassette ) { m_tape_image = nullptr; m_tape_size = m_tape_index = 0; } //************************************************************************** // SNAPSHOTS //************************************************************************** template SNAPSHOT_LOAD_MEMBER(nascom_state::snapshot_cb) { uint8_t line[29]; while (image.fread(&line, sizeof(line)) == sizeof(line)) { unsigned int addr, b[8], dummy; if (sscanf((char *)line, "%4x %x %x %x %x %x %x %x %x", &addr, &b[0], &b[1], &b[2], &b[3], &b[4], &b[5], &b[6], &b[7]) == 9) { for (int i = 0; i < 8; i++) { switch (Dest) { case 0: // snapshot m_maincpu->space(AS_PROGRAM).write_byte(addr++, b[i]); break; case 1: // character rom m_gfx1_region->base()[addr++] = b[i]; break; } } } else { image.seterror(IMAGE_ERROR_UNSPECIFIED, "Unsupported file format"); return image_init_result::FAIL; } dummy = 0x00; while (!image.image_feof() && dummy != 0x0a && dummy != 0x1f) { image.fread(&dummy, 1); } } return image_init_result::PASS; } //************************************************************************** // SOCKETS //************************************************************************** image_init_result nascom2_state::load_cart(device_image_interface &image, generic_slot_device *slot, int slot_id) { // loading directly from file if (!image.loaded_through_softlist()) { if (slot->length() > 0x1000) { image.seterror(IMAGE_ERROR_UNSPECIFIED, "Unsupported file size"); return image_init_result::FAIL; } slot->rom_alloc(slot->length(), GENERIC_ROM8_WIDTH, ENDIANNESS_LITTLE); slot->fread(slot->get_rom_base(), slot->length()); // we just assume that socket1 should be loaded to 0xc000 and socket2 to 0xd000 switch (slot_id) { case 1: m_maincpu->space(AS_PROGRAM).install_rom(0xc000, 0xc000 + slot->length() - 1, slot->get_rom_base()); break; case 2: m_maincpu->space(AS_PROGRAM).install_rom(0xd000, 0xd000 + slot->length() - 1, slot->get_rom_base()); break; } } // loading from software list. this supports multiple regions to load to else { uint8_t *region_b000 = image.get_software_region("b000"); uint8_t *region_c000 = image.get_software_region("c000"); uint8_t *region_d000 = image.get_software_region("d000"); if (region_b000 != nullptr) { uint32_t size = image.get_software_region_length("b000"); m_maincpu->space(AS_PROGRAM).install_rom(0xb000, 0xb000 + size - 1, region_b000); } if (region_c000 != nullptr) { uint32_t size = image.get_software_region_length("c000"); m_maincpu->space(AS_PROGRAM).install_rom(0xc000, 0xc000 + size - 1, region_c000); } if (region_d000 != nullptr) { uint32_t size = image.get_software_region_length("d000"); m_maincpu->space(AS_PROGRAM).install_rom(0xd000, 0xd000 + size - 1, region_d000); } } return image_init_result::PASS; } //************************************************************************** // DRIVER INIT //************************************************************************** void nascom_state::machine_reset() { m_kb_select = 0; m_kb_control = 0; m_port00 = 0; // Set up hd6402 pins m_hd6402->write_swe(1); m_hd6402->write_cs(0); m_hd6402->write_np(1); m_hd6402->write_nb1(1); m_hd6402->write_nb2(1); m_hd6402->write_eps(1); m_hd6402->write_tsb(1); m_hd6402->write_cs(1); } MACHINE_RESET_MEMBER(nascom2_state, nascom2) { machine_reset(); // nascom2: restore speed at machine start m_cass_speed = ioport("DSW0")->read(); // base machine reset nascom_state::machine_reset(); // restart address (on the real system, a12 to a15 are forced to 1 for one memory cycle) m_maincpu->set_state_int(Z80_PC, m_lsw1->read() << 12); } void nascom_state::init_nascom() { // install extra memory if (m_ram->size() > 0) { m_maincpu->space(AS_PROGRAM).install_ram(0x1000, 0x1000 + m_ram->size() - 1, m_ram->pointer()); } } // since we don't know for which regions we should disable ram, we just let other devices // overwrite the region they need, and re-install our ram when they are disabled WRITE_LINE_MEMBER( nascom2_state::ram_disable_w ) { if (state) { // enable ram again m_maincpu->space(AS_PROGRAM).install_ram(0x1000, 0x1000 + m_ram->size() - 1, m_ram->pointer()); } } void nascom2_state::init_nascom2c() { // install memory m_maincpu->space(AS_PROGRAM).install_ram(0x0000, 0x0000 + m_ram->size() - 1, m_ram->pointer()); } WRITE_LINE_MEMBER( nascom2_state::ram_disable_cpm_w ) { if (state) { // enable ram again m_maincpu->space(AS_PROGRAM).install_ram(0x0000, 0x0000 + m_ram->size() - 1, m_ram->pointer()); } } //************************************************************************** // VIDEO //************************************************************************** static const gfx_layout nascom1_charlayout = { 8, 16, 128, 1, { 0 }, { 0, 1, 2, 3, 4, 5, 6, 7 }, { 0*8, 1*8, 2*8, 3*8, 4*8, 5*8, 6*8, 7*8, 8*8, 9*8,10*8,11*8,12*8,13*8,14*8,15*8 }, 8 * 16 }; static GFXDECODE_START( gfx_nascom1 ) GFXDECODE_ENTRY("gfx1", 0x0000, nascom1_charlayout, 0, 1) GFXDECODE_END uint32_t nascom1_state::screen_update_nascom(screen_device &screen, bitmap_ind16 &bitmap, const rectangle &cliprect) { screen_update(bitmap, cliprect, 16); return 0; } static const gfx_layout nascom2_charlayout = { 8, 14, 256, 1, { 0 }, { 0, 1, 2, 3, 4, 5, 6, 7 }, { 0*8, 1*8, 2*8, 3*8, 4*8, 5*8, 6*8, 7*8, 8*8, 9*8, 10*8, 11*8, 12*8, 13*8 }, 8 * 16 }; static GFXDECODE_START( gfx_nascom2 ) GFXDECODE_ENTRY("gfx1", 0x0000, nascom2_charlayout, 0, 1) GFXDECODE_END uint32_t nascom2_state::screen_update_nascom(screen_device &screen, bitmap_ind16 &bitmap, const rectangle &cliprect) { screen_update(bitmap, cliprect, 14); return 0; } void nascom_state::screen_update(bitmap_ind16 &bitmap, const rectangle &cliprect, int char_height) { for (int sx = 0; sx < 48; sx++) { m_gfxdecode->gfx(0)->opaque(bitmap,cliprect, m_videoram[0x03ca + sx], 1, 0, 0, sx * 8, 0); } for (int sy = 0; sy < 15; sy++) { for (int sx = 0; sx < 48; sx++) { m_gfxdecode->gfx(0)->opaque(bitmap,cliprect, m_videoram[0x000a + (sy * 64) + sx], 1, 0, 0, sx * 8, (sy + 1) * char_height); } } } //************************************************************************** // ADDRESS MAPS //************************************************************************** void nascom1_state::nascom1_mem(address_map &map) { map(0x0000, 0x07ff).rom(); // MONITOR map(0x0800, 0x0bff).ram().share("videoram"); map(0x0c00, 0x0fff).ram(); // WRAM } void nascom1_state::nascom1_io(address_map &map) { map.global_mask(0x0f); map(0x00, 0x00).rw(FUNC(nascom1_state::nascom1_port_00_r), FUNC(nascom1_state::nascom1_port_00_w)); map(0x01, 0x01).rw(FUNC(nascom1_state::nascom1_port_01_r), FUNC(nascom1_state::nascom1_port_01_w)); map(0x02, 0x02).r(FUNC(nascom1_state::nascom1_port_02_r)); map(0x04, 0x07).rw("z80pio", FUNC(z80pio_device::read), FUNC(z80pio_device::write)); } void nascom2_state::nascom2_mem(address_map &map) { map(0x0000, 0x07ff).rom(); // MONITOR map(0x0800, 0x0bff).ram().share("videoram"); map(0x0c00, 0x0fff).ram(); // WRAM map(0xe000, 0xffff).rom().region("basic", 0); } void nascom2_state::nascom2_io(address_map &map) { map.global_mask(0xff); map(0x00, 0x00).rw(FUNC(nascom2_state::nascom1_port_00_r), FUNC(nascom2_state::nascom1_port_00_w)); map(0x01, 0x01).rw(FUNC(nascom2_state::nascom1_port_01_r), FUNC(nascom2_state::nascom1_port_01_w)); map(0x02, 0x02).r(FUNC(nascom2_state::nascom1_port_02_r)); map(0x04, 0x07).rw("z80pio", FUNC(z80pio_device::read), FUNC(z80pio_device::write)); } void nascom2_state::nascom2c_mem(address_map &map) { map(0xf000, 0xf7ff).rom().region("maincpu", 0); map(0xf800, 0xfbff).ram().share("videoram"); map(0xfc00, 0xffff).ram(); // WRAM } //************************************************************************** // INPUT PORTS //************************************************************************** static INPUT_PORTS_START( nascom1 ) PORT_START("KEY.0") PORT_BIT(0x01, IP_ACTIVE_LOW, IPT_KEYBOARD) PORT_NAME("Backspace ClearScreen") PORT_CODE(KEYCODE_CLOSEBRACE) PORT_CHAR(8) PORT_BIT(0x02, IP_ACTIVE_LOW, IPT_KEYBOARD) PORT_NAME("New Line") PORT_CODE(KEYCODE_ENTER) PORT_CHAR(13) PORT_BIT(0x04, IP_ACTIVE_LOW, IPT_KEYBOARD) PORT_CODE(KEYCODE_MINUS) PORT_CHAR('-') PORT_CHAR('=') PORT_BIT(0x10, IP_ACTIVE_LOW, IPT_KEYBOARD) PORT_CODE(KEYCODE_LSHIFT) PORT_CODE(KEYCODE_RSHIFT) PORT_CHAR(UCHAR_SHIFT_1) PORT_BIT(0x20, IP_ACTIVE_LOW, IPT_KEYBOARD) PORT_CODE(KEYCODE_OPENBRACE) PORT_CHAR('@') PORT_BIT(0x48, IP_ACTIVE_LOW, IPT_UNUSED) PORT_START("KEY.1") PORT_BIT(0x01, IP_ACTIVE_LOW, IPT_KEYBOARD) PORT_CODE(KEYCODE_H) PORT_CHAR('H') PORT_CHAR('h') PORT_BIT(0x02, IP_ACTIVE_LOW, IPT_KEYBOARD) PORT_CODE(KEYCODE_B) PORT_CHAR('B') PORT_CHAR('b') PORT_BIT(0x04, IP_ACTIVE_LOW, IPT_KEYBOARD) PORT_CODE(KEYCODE_5) PORT_CHAR('5') PORT_CHAR('%') PORT_BIT(0x08, IP_ACTIVE_LOW, IPT_KEYBOARD) PORT_CODE(KEYCODE_F) PORT_CHAR('F') PORT_CHAR('f') PORT_BIT(0x10, IP_ACTIVE_LOW, IPT_KEYBOARD) PORT_CODE(KEYCODE_X) PORT_CHAR('X') PORT_CHAR('x') PORT_BIT(0x20, IP_ACTIVE_LOW, IPT_KEYBOARD) PORT_CODE(KEYCODE_T) PORT_CHAR('T') PORT_CHAR('t') PORT_BIT(0x40, IP_ACTIVE_LOW, IPT_KEYBOARD) PORT_CODE(KEYCODE_UP) PORT_CHAR(UCHAR_MAMEKEY(UP)) PORT_START("KEY.2") PORT_BIT(0x01, IP_ACTIVE_LOW, IPT_KEYBOARD) PORT_CODE(KEYCODE_J) PORT_CHAR('J') PORT_CHAR('j') PORT_BIT(0x02, IP_ACTIVE_LOW, IPT_KEYBOARD) PORT_CODE(KEYCODE_N) PORT_CHAR('N') PORT_CHAR('n') PORT_BIT(0x04, IP_ACTIVE_LOW, IPT_KEYBOARD) PORT_CODE(KEYCODE_6) PORT_CHAR('6') PORT_CHAR('&') PORT_BIT(0x08, IP_ACTIVE_LOW, IPT_KEYBOARD) PORT_CODE(KEYCODE_D) PORT_CHAR('D') PORT_CHAR('d') PORT_BIT(0x10, IP_ACTIVE_LOW, IPT_KEYBOARD) PORT_CODE(KEYCODE_Z) PORT_CHAR('Z') PORT_CHAR('z') PORT_BIT(0x20, IP_ACTIVE_LOW, IPT_KEYBOARD) PORT_CODE(KEYCODE_Y) PORT_CHAR('Y') PORT_CHAR('y') PORT_BIT(0x40, IP_ACTIVE_LOW, IPT_KEYBOARD) PORT_CODE(KEYCODE_LEFT) PORT_CHAR(UCHAR_MAMEKEY(LEFT)) PORT_START("KEY.3") PORT_BIT(0x01, IP_ACTIVE_LOW, IPT_KEYBOARD) PORT_CODE(KEYCODE_K) PORT_CHAR('K') PORT_CHAR('k') PORT_BIT(0x02, IP_ACTIVE_LOW, IPT_KEYBOARD) PORT_CODE(KEYCODE_M) PORT_CHAR('M') PORT_CHAR('m') PORT_BIT(0x04, IP_ACTIVE_LOW, IPT_KEYBOARD) PORT_CODE(KEYCODE_7) PORT_CHAR('7') PORT_CHAR('\'') PORT_BIT(0x08, IP_ACTIVE_LOW, IPT_KEYBOARD) PORT_CODE(KEYCODE_E) PORT_CHAR('E') PORT_CHAR('e') PORT_BIT(0x10, IP_ACTIVE_LOW, IPT_KEYBOARD) PORT_CODE(KEYCODE_S) PORT_CHAR('S') PORT_CHAR('s') PORT_BIT(0x20, IP_ACTIVE_LOW, IPT_KEYBOARD) PORT_CODE(KEYCODE_U) PORT_CHAR('U') PORT_CHAR('u') PORT_BIT(0x40, IP_ACTIVE_LOW, IPT_KEYBOARD) PORT_CODE(KEYCODE_DOWN) PORT_CHAR(UCHAR_MAMEKEY(DOWN)) PORT_START("KEY.4") PORT_BIT(0x01, IP_ACTIVE_LOW, IPT_KEYBOARD) PORT_CODE(KEYCODE_L) PORT_CHAR('L') PORT_CHAR('l') PORT_BIT(0x02, IP_ACTIVE_LOW, IPT_KEYBOARD) PORT_CODE(KEYCODE_COMMA) PORT_CHAR(',') PORT_CHAR('<') PORT_BIT(0x04, IP_ACTIVE_LOW, IPT_KEYBOARD) PORT_CODE(KEYCODE_8) PORT_CHAR('8') PORT_CHAR('(') PORT_BIT(0x08, IP_ACTIVE_LOW, IPT_KEYBOARD) PORT_CODE(KEYCODE_W) PORT_CHAR('W') PORT_CHAR('w') PORT_BIT(0x10, IP_ACTIVE_LOW, IPT_KEYBOARD) PORT_CODE(KEYCODE_A) PORT_CHAR('A') PORT_CHAR('a') PORT_BIT(0x20, IP_ACTIVE_LOW, IPT_KEYBOARD) PORT_CODE(KEYCODE_I) PORT_CHAR('I') PORT_CHAR('i') PORT_BIT(0x40, IP_ACTIVE_LOW, IPT_KEYBOARD) PORT_CODE(KEYCODE_RIGHT) PORT_CHAR(UCHAR_MAMEKEY(RIGHT)) PORT_START("KEY.5") PORT_BIT(0x01, IP_ACTIVE_LOW, IPT_KEYBOARD) PORT_CODE(KEYCODE_COLON) PORT_CHAR(';') PORT_CHAR('+') PORT_BIT(0x02, IP_ACTIVE_LOW, IPT_KEYBOARD) PORT_CODE(KEYCODE_STOP) PORT_CHAR('.') PORT_CHAR('>') PORT_BIT(0x04, IP_ACTIVE_LOW, IPT_KEYBOARD) PORT_CODE(KEYCODE_9) PORT_CHAR('9') PORT_CHAR(')') PORT_BIT(0x08, IP_ACTIVE_LOW, IPT_KEYBOARD) PORT_CODE(KEYCODE_3) PORT_CHAR('3') PORT_CHAR(0xA3) PORT_BIT(0x10, IP_ACTIVE_LOW, IPT_KEYBOARD) PORT_CODE(KEYCODE_Q) PORT_CHAR('Q') PORT_CHAR('q') PORT_BIT(0x20, IP_ACTIVE_LOW, IPT_KEYBOARD) PORT_CODE(KEYCODE_O) PORT_CHAR('O') PORT_CHAR('o') PORT_BIT(0x40, IP_ACTIVE_LOW, IPT_UNUSED) PORT_START("KEY.6") PORT_BIT(0x01, IP_ACTIVE_LOW, IPT_KEYBOARD) PORT_CODE(KEYCODE_QUOTE) PORT_CHAR(':') PORT_CHAR('*') PORT_BIT(0x02, IP_ACTIVE_LOW, IPT_KEYBOARD) PORT_CODE(KEYCODE_SLASH) PORT_CHAR('/') PORT_CHAR('?') PORT_BIT(0x04, IP_ACTIVE_LOW, IPT_KEYBOARD) PORT_CODE(KEYCODE_0) PORT_CHAR('0') PORT_BIT(0x08, IP_ACTIVE_LOW, IPT_KEYBOARD) PORT_CODE(KEYCODE_2) PORT_CHAR('2') PORT_CHAR('\"') PORT_BIT(0x10, IP_ACTIVE_LOW, IPT_KEYBOARD) PORT_CODE(KEYCODE_1) PORT_CHAR('1') PORT_CHAR('!') PORT_BIT(0x20, IP_ACTIVE_LOW, IPT_KEYBOARD) PORT_CODE(KEYCODE_P) PORT_CHAR('P') PORT_CHAR('p') PORT_BIT(0x40, IP_ACTIVE_LOW, IPT_UNUSED) PORT_START("KEY.7") PORT_BIT(0x01, IP_ACTIVE_LOW, IPT_KEYBOARD) PORT_CODE(KEYCODE_G) PORT_CHAR('G') PORT_CHAR('g') PORT_BIT(0x02, IP_ACTIVE_LOW, IPT_KEYBOARD) PORT_CODE(KEYCODE_V) PORT_CHAR('V') PORT_CHAR('v') PORT_BIT(0x04, IP_ACTIVE_LOW, IPT_KEYBOARD) PORT_CODE(KEYCODE_4) PORT_CHAR('4') PORT_CHAR('$') PORT_BIT(0x08, IP_ACTIVE_LOW, IPT_KEYBOARD) PORT_CODE(KEYCODE_C) PORT_CHAR('C') PORT_CHAR('c') PORT_BIT(0x10, IP_ACTIVE_LOW, IPT_KEYBOARD) PORT_CODE(KEYCODE_SPACE) PORT_CHAR(' ') PORT_BIT(0x20, IP_ACTIVE_LOW, IPT_KEYBOARD) PORT_CODE(KEYCODE_R) PORT_CHAR('R') PORT_CHAR('r') PORT_BIT(0x40, IP_ACTIVE_LOW, IPT_UNUSED) INPUT_PORTS_END static INPUT_PORTS_START( nascom2 ) PORT_INCLUDE(nascom1) PORT_MODIFY("KEY.0") PORT_BIT(0x01, IP_ACTIVE_LOW, IPT_KEYBOARD) PORT_NAME("Back CS") PORT_CODE(KEYCODE_CLOSEBRACE) PORT_CHAR(8) PORT_BIT(0x02, IP_ACTIVE_LOW, IPT_KEYBOARD) PORT_NAME("Enter Escape") PORT_CODE(KEYCODE_ENTER) PORT_CHAR(13) PORT_CHAR(27) PORT_BIT(0x08, IP_ACTIVE_LOW, IPT_KEYBOARD) PORT_NAME("CTRL") PORT_CODE(KEYCODE_LCONTROL) PORT_CODE(KEYCODE_RCONTROL) PORT_CHAR(UCHAR_SHIFT_2) PORT_BIT(0x40, IP_ACTIVE_LOW, IPT_UNUSED) PORT_MODIFY("KEY.6") PORT_BIT(0x40, IP_ACTIVE_LOW, IPT_KEYBOARD) PORT_CODE(KEYCODE_EQUALS) PORT_CHAR('[') PORT_CHAR('\\') PORT_MODIFY("KEY.7") PORT_BIT(0x40, IP_ACTIVE_LOW, IPT_KEYBOARD) PORT_CODE(KEYCODE_BACKSPACE) PORT_CHAR(']') PORT_CHAR('_') PORT_START("DSW0") PORT_DIPNAME(0x01, 0x00, "Cassette Baud Rate") PORT_CHANGED_MEMBER(DEVICE_SELF, nascom2_state, cass_speed, 0) PORT_DIPSETTING(0x00, "300") PORT_DIPSETTING(0x01, "1200") // link switch on board PORT_START("lsw1") PORT_DIPNAME(0x0f, 0x00, "Restart address") PORT_DIPLOCATION("LSW1:1,2,3,4") PORT_DIPSETTING(0x00, "0000H") PORT_DIPSETTING(0x01, "1000H") PORT_DIPSETTING(0x02, "2000H") PORT_DIPSETTING(0x03, "3000H") PORT_DIPSETTING(0x04, "4000H") PORT_DIPSETTING(0x05, "5000H") PORT_DIPSETTING(0x06, "6000H") PORT_DIPSETTING(0x07, "7000H") PORT_DIPSETTING(0x08, "8000H") PORT_DIPSETTING(0x09, "9000H") PORT_DIPSETTING(0x0a, "A000H") PORT_DIPSETTING(0x0b, "B000H") PORT_DIPSETTING(0x0c, "C000H") PORT_DIPSETTING(0x0d, "D000H") PORT_DIPSETTING(0x0e, "E000H") PORT_DIPSETTING(0x0f, "F000H") INPUT_PORTS_END static INPUT_PORTS_START( nascom2c ) PORT_INCLUDE(nascom2) PORT_MODIFY("lsw1") PORT_DIPNAME(0x0f, 0x0f, "Restart address") PORT_DIPLOCATION("LSW1:1,2,3,4") PORT_DIPSETTING(0x00, "0000H") PORT_DIPSETTING(0x01, "1000H") PORT_DIPSETTING(0x02, "2000H") PORT_DIPSETTING(0x03, "3000H") PORT_DIPSETTING(0x04, "4000H") PORT_DIPSETTING(0x05, "5000H") PORT_DIPSETTING(0x06, "6000H") PORT_DIPSETTING(0x07, "7000H") PORT_DIPSETTING(0x08, "8000H") PORT_DIPSETTING(0x09, "9000H") PORT_DIPSETTING(0x0a, "A000H") PORT_DIPSETTING(0x0b, "B000H") PORT_DIPSETTING(0x0c, "C000H") PORT_DIPSETTING(0x0d, "D000H") PORT_DIPSETTING(0x0e, "E000H") PORT_DIPSETTING(0x0f, "F000H") INPUT_PORTS_END INPUT_CHANGED_MEMBER(nascom2_state::cass_speed) { m_cass_speed = newval ? 1 : 0; } //************************************************************************** // MACHINE DRIVERS //************************************************************************** void nascom_state::nascom(machine_config &config) { // video hardware SCREEN(config, m_screen, SCREEN_TYPE_RASTER); m_screen->set_refresh_hz(50); m_screen->set_vblank_time(ATTOSECONDS_IN_USEC(2500)); /* not accurate */ m_screen->set_size(48 * 8, 16 * 16); m_screen->set_visarea(0, 48 * 8 - 1, 0, 16 * 16 - 1); m_screen->set_screen_update(FUNC(nascom1_state::screen_update_nascom)); m_screen->set_palette(m_palette); GFXDECODE(config, m_gfxdecode, m_palette, gfx_nascom1); PALETTE(config, m_palette, palette_device::MONOCHROME); // pio Z80PIO(config, "z80pio", 16_MHz_XTAL / 8); // internal extra ram RAM(config, m_ram).set_default_size("48K").set_extra_options("8K,16K,32K"); // uart AY31015(config, m_hd6402); m_hd6402->read_si_callback().set(FUNC(nascom_state::hd6402_si)); m_hd6402->write_so_callback().set(FUNC(nascom_state::hd6402_so)); m_hd6402->set_auto_rdav(true); // cassette is connected to the uart CASSETTE(config, m_cass); m_cass->set_interface("nascom_cass"); m_cass->set_default_state(CASSETTE_STOPPED | CASSETTE_SPEAKER_ENABLED | CASSETTE_MOTOR_ENABLED); SPEAKER(config, "mono").front_center(); m_cass->add_route(ALL_OUTPUTS, "mono", 0.05); // devices snapshot_image_device &snapshot(SNAPSHOT(config, "snapshot", "nas", attotime::from_msec(500))); snapshot.set_load_callback(FUNC(nascom_state::snapshot_cb<0>)); snapshot.set_interface("nascom_snap"); snapshot_image_device &snapchar(SNAPSHOT(config, "snapchar", "chr", attotime::from_msec(500))); snapchar.set_load_callback(FUNC(nascom_state::snapshot_cb<1>)); snapchar.set_interface("nascom_char"); } void nascom1_state::nascom1(machine_config &config) { nascom(config); Z80(config, m_maincpu, 16_MHz_XTAL / 8); m_maincpu->set_addrmap(AS_PROGRAM, &nascom1_state::nascom1_mem); m_maincpu->set_addrmap(AS_IO, &nascom1_state::nascom1_io); // software SOFTWARE_LIST(config, "snap_list").set_original("nascom_snap").set_filter("NASCOM1"); clock_device &uart_clock(CLOCK(config, "uart_clock", (16_MHz_XTAL / 16) / 256)); uart_clock.signal_handler().set(FUNC(nascom1_state::nascom1_kansas_w)); uart_clock.signal_handler().append(m_hd6402, FUNC(ay31015_device::write_rcp)); TIMER(config, "kansas_r").configure_periodic(FUNC(nascom1_state::nascom1_kansas_r), attotime::from_hz(40000)); } void nascom2_state::nascom2(machine_config &config) { nascom(config); Z80(config, m_maincpu, 16_MHz_XTAL / 4); m_maincpu->set_addrmap(AS_PROGRAM, &nascom2_state::nascom2_mem); m_maincpu->set_addrmap(AS_IO, &nascom2_state::nascom2_io); MCFG_MACHINE_RESET_OVERRIDE(nascom2_state, nascom2 ) // video hardware m_screen->set_size(48 * 8, 16 * 14); m_screen->set_visarea(0, 48 * 8 - 1, 0, 16 * 14 - 1); m_screen->set_screen_update(FUNC(nascom2_state::screen_update_nascom)); m_gfxdecode->set_info(gfx_nascom2); // generic sockets for ram/rom (todo: support ram here) GENERIC_SOCKET(config, m_socket1, generic_plain_slot, "nascom_socket", "bin,rom"); m_socket1->set_device_load(FUNC(nascom2_state::socket1_load)); GENERIC_SOCKET(config, m_socket2, generic_plain_slot, "nascom_socket", "bin,rom"); m_socket2->set_device_load(FUNC(nascom2_state::socket2_load)); // nasbus expansion bus NASBUS(config, m_nasbus); m_nasbus->ram_disable().set(FUNC(nascom2_state::ram_disable_w)); m_nasbus->set_program_space(m_maincpu, AS_PROGRAM); m_nasbus->set_io_space(m_maincpu, AS_IO); NASBUS_SLOT(config, "nasbus1", m_nasbus, nasbus_slot_cards, nullptr); NASBUS_SLOT(config, "nasbus2", m_nasbus, nasbus_slot_cards, nullptr); NASBUS_SLOT(config, "nasbus3", m_nasbus, nasbus_slot_cards, nullptr); NASBUS_SLOT(config, "nasbus4", m_nasbus, nasbus_slot_cards, nullptr); // software SOFTWARE_LIST(config, "snap_list").set_original("nascom_snap").set_filter("NASCOM2"); SOFTWARE_LIST(config, "socket_list").set_original("nascom_socket"); SOFTWARE_LIST(config, "floppy_list").set_original("nascom_flop"); CLOCK(config, m_clock, (16_MHz_XTAL / 32) / 26); m_clock->signal_handler().set(FUNC(nascom2_state::nascom2_kansas_w)); TIMER(config, "kansas_r").configure_periodic(FUNC(nascom2_state::nascom2_kansas_r), attotime::from_hz(40000)); } void nascom2_state::nascom2c(machine_config &config) { nascom2(config); m_maincpu->set_addrmap(AS_PROGRAM, &nascom2_state::nascom2c_mem); m_ram->set_default_size("60K"); m_nasbus->ram_disable().set(FUNC(nascom2_state::ram_disable_cpm_w)); subdevice("nasbus1")->set_default_option("floppy"); } //************************************************************************** // ROM DEFINITIONS //************************************************************************** ROM_START( nascom1 ) ROM_REGION(0x0800, "maincpu", 0) ROM_DEFAULT_BIOS("t4") ROM_SYSTEM_BIOS(0, "t1", "NasBug T1") ROMX_LOAD("nasbugt1.ic38", 0x0000, 0x0400, CRC(8ea07054) SHA1(3f9a8632826003d6ea59d2418674d0fb09b83a4c), ROM_BIOS(0)) ROM_SYSTEM_BIOS(1, "t2", "NasBug T2") ROMX_LOAD("nasbugt2.ic38", 0x0000, 0x0400, CRC(e371b58a) SHA1(485b20a560b587cf9bb4208ba203b12b3841689b), ROM_BIOS(1)) ROM_SYSTEM_BIOS(2, "t4", "NasBug T4") ROMX_LOAD("nasbugt4.rom", 0x0000, 0x0800, CRC(f391df68) SHA1(00218652927afc6360c57e77d6a4fd32d4e34566), ROM_BIOS(2)) // should really be split in halves for ic38 and ic39 ROM_SYSTEM_BIOS(3, "bbug", "B-Bug") // by Viewfax 1978 ROMX_LOAD("bbug.rom", 0x0000, 0x0800, CRC(1b1a340d) SHA1(99ce4d771871b3d797cc465d6245c40e41acef3e), ROM_BIOS(3)) ROM_REGION(0x0800, "gfx1", 0) ROM_LOAD("nascom1.ic16", 0x0000, 0x0800, CRC(33e92a04) SHA1(be6e1cc80e7f95a032759f7df19a43c27ff93a52)) // MCM6576P ROM_END ROM_START( nascom2 ) ROM_REGION(0x0800, "maincpu", 0) ROM_DEFAULT_BIOS("ns3") ROM_SYSTEM_BIOS(0, "ns1", "Nas-Sys 1") ROMX_LOAD("nassys1.ic34", 0x0000, 0x0800, CRC(b6300716) SHA1(29da7d462ba3f569f70ed3ecd93b981f81c7adfa), ROM_BIOS(0)) ROM_SYSTEM_BIOS(1, "ns3", "Nas-Sys 3") ROMX_LOAD("nassys3.ic34", 0x0000, 0x0800, CRC(6804e675) SHA1(d55dccec2d1da992a39c38b0b6d24e3809073513), ROM_BIOS(1)) ROM_SYSTEM_BIOS(2, "ns3a", "Nas-Sys 3 (AVC)") ROMX_LOAD("nassys3a.ic34", 0x0000, 0x0800, CRC(39d24a05) SHA1(7bfb574c1f8ce0f460a53b9a6c11c711aabccbb8), ROM_BIOS(2)) ROM_SYSTEM_BIOS(3, "ns3n", "Nas-Sys 3 (NET)") ROMX_LOAD("nassys3n.ic34", 0x0000, 0x0800, CRC(87ef62bb) SHA1(dab81511925be36044b3e8b0ba26a0c717fe83ae), ROM_BIOS(3)) ROM_REGION(0x2000, "basic", 0) ROM_LOAD("basic.ic43", 0x0000, 0x2000, CRC(5cb5197b) SHA1(c41669c2b6d6dea808741a2738426d97bccc9b07)) ROM_REGION(0x1000, "gfx1", 0) ROM_LOAD("nascom1.ic66", 0x0000, 0x0800, CRC(33e92a04) SHA1(be6e1cc80e7f95a032759f7df19a43c27ff93a52)) ROM_LOAD("nasgra.ic54", 0x0800, 0x0800, CRC(2bc09d32) SHA1(d384297e9b02cbcb283c020da51b3032ff62b1ae)) ROM_END ROM_START( nascom2c ) ROM_REGION(0x0800, "maincpu", 0) ROM_DEFAULT_BIOS("cpm32") ROM_SYSTEM_BIOS(0, "cpm21", "CP/M boot v2.1") ROMX_LOAD("cpmbt21.ic34", 0x0000, 0x0800, CRC(44b67ffc) SHA1(60c8335f24798f8de7ad48a4cd03e56a60d87b63), ROM_BIOS(0)) ROM_SYSTEM_BIOS(1, "cpm32", "CP/M boot v3.2") ROMX_LOAD("cpmbt32.ic34", 0x0000, 0x0800, CRC(724f03ba) SHA1(d0958c231e5b121b6c4c97d03c76c207acf90f5a), ROM_BIOS(1)) ROM_REGION(0x1000, "gfx1", 0) ROM_LOAD("nascom1.ic66", 0x0000, 0x0800, CRC(33e92a04) SHA1(be6e1cc80e7f95a032759f7df19a43c27ff93a52)) ROM_LOAD("nasgra.ic54", 0x0800, 0x0800, CRC(2bc09d32) SHA1(d384297e9b02cbcb283c020da51b3032ff62b1ae)) ROM_END //************************************************************************** // GAME DRIVERS //************************************************************************** // YEAR NAME PARENT COMPAT MACHINE INPUT CLASS INIT COMPANY FULLNAME FLAGS COMP( 1978, nascom1, 0, 0, nascom1, nascom1, nascom1_state, init_nascom, "Nascom Microcomputers", "Nascom 1", MACHINE_NO_SOUND_HW ) COMP( 1979, nascom2, 0, 0, nascom2, nascom2, nascom2_state, init_nascom, "Nascom Microcomputers", "Nascom 2", MACHINE_NO_SOUND_HW ) COMP( 1980, nascom2c, nascom2, 0, nascom2c, nascom2c, nascom2_state, init_nascom2c, "Nascom Microcomputers", "Nascom 2 (CP/M)", MACHINE_NO_SOUND_HW )