diff options
Diffstat (limited to 'src/mame/drivers/freeway.cpp')
-rw-r--r-- | src/mame/drivers/freeway.cpp | 191 |
1 files changed, 191 insertions, 0 deletions
diff --git a/src/mame/drivers/freeway.cpp b/src/mame/drivers/freeway.cpp new file mode 100644 index 00000000000..38db5cdcc93 --- /dev/null +++ b/src/mame/drivers/freeway.cpp @@ -0,0 +1,191 @@ +// 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<cpu_device> m_maincpu; + required_device<pic8259_device> m_pic; + + required_shared_ptr<u8> m_charram; + required_shared_ptr<u8> 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), this); + 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) |