// license:BSD-3-Clause // copyright-holders:AJR /********************************************************************* FreeWay (c) 1999 NVC Electronica Ltd. Skeleton driver. *********************************************************************/ #include "emu.h" #include "bus/rs232/rs232.h" #include "cpu/i86/i86.h" #include "machine/ins8250.h" #include "machine/pit8253.h" #include "machine/pic8259.h" #include "machine/timekpr.h" #include "video/mc6845.h" #include "emupal.h" #include "screen.h" class freeway_state : public driver_device { public: freeway_state(const machine_config &mconfig, device_type type, const char *tag) : driver_device(mconfig, type, tag) , m_maincpu(*this, "maincpu") , m_pic(*this, "pic") , m_charram(*this, "charram") , m_colorram(*this, "colorram") , m_lamps(*this, "lamp%u", 1U) { } void freeway(machine_config &config); DECLARE_WRITE_LINE_MEMBER(nmi_w); protected: virtual void machine_start() override; private: MC6845_UPDATE_ROW(update_row); void lamps_w(u8 data); void mem_map(address_map &map); void io_map(address_map &map); required_device m_maincpu; required_device m_pic; required_shared_ptr m_charram; required_shared_ptr m_colorram; output_finder<3> m_lamps; }; void freeway_state::machine_start() { m_lamps.resolve(); } MC6845_UPDATE_ROW(freeway_state::update_row) { } void freeway_state::lamps_w(u8 data) { for (int n = 0; n < 3; n++) m_lamps[n] = BIT(data, n); } WRITE_LINE_MEMBER(freeway_state::nmi_w) { m_maincpu->set_input_line(INPUT_LINE_NMI, state); } void freeway_state::mem_map(address_map &map) { map(0x00000, 0x07fff).ram(); map(0x08000, 0x09fff).rw("timekpr", FUNC(timekeeper_device::read), FUNC(timekeeper_device::write)); map(0xa0000, 0xa0fff).ram().share("charram"); map(0xa4000, 0xa4fff).ram().share("colorram"); map(0xf0000, 0xfffff).rom().region("program", 0); } void freeway_state::io_map(address_map &map) { map(0x0020, 0x0021).rw(m_pic, FUNC(pic8259_device::read), FUNC(pic8259_device::write)); map(0x0030, 0x0033).w("pit", FUNC(pit8254_device::write)); map(0x0040, 0x0047).rw("uart", FUNC(ns16450_device::ins8250_r), FUNC(ns16450_device::ins8250_w)); map(0x00a3, 0x00a3).w(FUNC(freeway_state::lamps_w)); map(0x00d0, 0x00d0).portr("CONFIG"); map(0x03d0, 0x03d0).w("crtc", FUNC(mc6845_device::address_w)); map(0x03d1, 0x03d1).w("crtc", FUNC(mc6845_device::register_w)); } static INPUT_PORTS_START(freeway) PORT_START("CONFIG") PORT_DIPNAME(0x01, 0x00, "Screen Format") PORT_DIPSETTING(0x00, "PAL") PORT_DIPSETTING(0x01, "NTSC?") // 268 lines total, 58.3 Hz refresh PORT_BIT(0x08, 0x08, IPT_UNKNOWN) PORT_BIT(0xf6, 0xf6, IPT_UNKNOWN) // probably unused PORT_START("RESET") PORT_BIT(0x01, IP_ACTIVE_HIGH, IPT_MEMORY_RESET) PORT_WRITE_LINE_DEVICE_MEMBER(DEVICE_SELF, freeway_state, nmi_w) INPUT_PORTS_END static const gfx_layout char_layout = { 8,8, RGN_FRAC(1,3), 3, { RGN_FRAC(2,3), RGN_FRAC(1,3), RGN_FRAC(0,3) }, { 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, }; static GFXDECODE_START(gfx_freeway) GFXDECODE_ENTRY("gfx", 0, char_layout, 0x0, 1) GFXDECODE_END void freeway_state::freeway(machine_config &config) { I8088(config, m_maincpu, 10_MHz_XTAL / 2); // divider unknown m_maincpu->set_addrmap(AS_PROGRAM, &freeway_state::mem_map); m_maincpu->set_addrmap(AS_IO, &freeway_state::io_map); m_maincpu->set_irq_acknowledge_callback("pic", FUNC(pic8259_device::inta_cb)); PIC8259(config, m_pic); m_pic->out_int_callback().set_inputline(m_maincpu, 0); pit8254_device &pit(PIT8254(config, "pit")); pit.out_handler<0>().set(m_pic, FUNC(pic8259_device::ir0_w)); M48T58(config, "timekpr"); screen_device &screen(SCREEN(config, "screen", SCREEN_TYPE_RASTER)); screen.set_raw(10_MHz_XTAL / 2, 320, 0, 256, 312, 0, 256); screen.set_screen_update("crtc", FUNC(mc6845_device::screen_update)); PALETTE(config, "palette").set_entries(0x10); GFXDECODE(config, "gfxdecode", "palette", gfx_freeway); mc6845_device &crtc(MC6845(config, "crtc", 10_MHz_XTAL / 16)); crtc.set_char_width(8); crtc.set_show_border_area(false); crtc.set_screen("screen"); crtc.set_update_row_callback(FUNC(freeway_state::update_row)); crtc.out_hsync_callback().set("pit", FUNC(pit8254_device::write_clk0)); // guess ns16450_device &uart(NS16450(config, "uart", 10_MHz_XTAL / 8)); // type unknown uart.out_int_callback().set(m_pic, FUNC(pic8259_device::ir2_w)); uart.out_tx_callback().set("rs232", FUNC(rs232_port_device::write_txd)); uart.out_rts_callback().set("rs232", FUNC(rs232_port_device::write_rts)); uart.out_dtr_callback().set("rs232", FUNC(rs232_port_device::write_dtr)); rs232_port_device &rs232(RS232_PORT(config, "rs232", default_rs232_devices, nullptr)); rs232.rxd_handler().set("uart", FUNC(ns16450_device::rx_w)); rs232.cts_handler().set("uart", FUNC(ns16450_device::cts_w)); rs232.dsr_handler().set("uart", FUNC(ns16450_device::dsr_w)); rs232.dcd_handler().set("uart", FUNC(ns16450_device::dcd_w)); } // 8088 CPU // Intel 8254 Programmable Interval Timer // Intel 8259 // 2x 8k SRAM // 1x 32k SRAM // 6845 video chip // 5 roms // Oscillator 10 MHz ROM_START(freeway) ROM_REGION(0x10000, "program", 0) ROM_LOAD("vip88.bin", 0x00000, 0x10000, CRC(aeba6d5e) SHA1(bb84f7040bf1b6976cb2c50b1ffdc59ae88df223)) ROM_REGION(0x18000, "gfx", 0) ROM_LOAD("sb_51.bin", 0x00000, 0x8000, CRC(d25bd328) SHA1(b8c692298f6dc5fd5ae2f9e7701e14b0436a95bb)) // xxx0xxxxxxxxxxx = 0xFF ROM_LOAD("sb_52.bin", 0x08000, 0x8000, CRC(f2b33acd) SHA1(e4786b4f00871d771aadacd9d6ec767691f4d939)) ROM_LOAD("sb_53.bin", 0x10000, 0x8000, CRC(50407ae6) SHA1(2c6c4803905bed5f27c6783f99a24f8dee62c19b)) ROM_REGION(0x8000, "cor", 0) ROM_LOAD("sb_cor.bin", 0x0000, 0x8000, CRC(5f86a160) SHA1(f21b7e0e6a407371c252d6fde6fcb32a2682824c)) // all 0xFF fill until 0x7C00; valid data is only 4 bits wide ROM_END GAME(1999, freeway, 0, freeway, freeway, freeway_state, empty_init, ROT0, "NVC Electronica", "FreeWay (V5.12)", MACHINE_IS_SKELETON)