// license:BSD-3-Clause // copyright-holders:Philip Bennett /*************************************************************************** Atari System IV hardware preliminary driver by Phil Bennett Games supported: * The Last Starfighter (prototype) * Air Race (prototype) To do: * Finish video implementation * Find missing HUD/text data for both games ****************************************************************************/ #include "emu.h" #include "cpu/m68000/m68000.h" #include "cpu/tms32010/tms32010.h" #include "video/poly.h" #include "screen.h" class atarisy4_state : public driver_device { public: atarisy4_state(const machine_config &mconfig, device_type type, const char *tag) : driver_device(mconfig, type, tag), m_maincpu(*this, "maincpu"), m_dsp0(*this, "dsp0"), m_dsp0_bank1(*this, "dsp0_bank1"), m_palette(*this, "palette"), m_screen(*this, "screen"), m_m68k_ram(*this, "m68k_ram"), m_screen_ram(*this, "screen_ram"), m_stick(*this, "STICK%c", 'X') { } void init_laststar(); void atarisy4(machine_config &config); protected: struct atarisy4_polydata { uint16_t color; uint16_t *screen_ram; }; class atarisy4_renderer : public poly_manager { public: atarisy4_renderer(atarisy4_state &state, screen_device &screen); ~atarisy4_renderer() {} void draw_scanline(int32_t scanline, const extent_t &extent, const atarisy4_polydata &extradata, int threadid); void draw_polygon(uint16_t color); protected: atarisy4_state &m_state; }; struct gpu { uint32_t xy_to_screen_addr(uint32_t x, uint32_t y) const; /* Memory-mapped registers */ uint16_t gr[8]; /* Command parameters */ uint16_t bcrw; /* Screen buffer W control */ uint16_t bcrx; /* Screen buffer X control */ uint16_t bcry; /* Screen buffer Y control */ uint16_t bcrz; /* Screen buffer Z control */ uint16_t psrw; uint16_t psrx; uint16_t psry; uint16_t psrz; uint16_t dpr; uint16_t ctr; uint16_t lfr; uint16_t ifr; uint16_t ecr; /* Execute command register */ uint16_t far; uint16_t mcr; /* Interrupt control */ uint16_t qlr; uint16_t qar; uint16_t dhr; /* Scanline counter */ uint16_t dlr; /* Others */ uint16_t idr; uint16_t icd; uint8_t transpose; uint8_t vblank_wait; /* Polygon points */ struct { int16_t x; int16_t y; } points[16]; uint16_t pt_idx; bool poly_open; uint16_t clip_min_x; uint16_t clip_max_x; uint16_t clip_min_y; uint16_t clip_max_y; }; DECLARE_WRITE16_MEMBER(gpu_w); DECLARE_READ16_MEMBER(gpu_r); DECLARE_READ16_MEMBER(m68k_shared_0_r); DECLARE_WRITE16_MEMBER(m68k_shared_0_w); DECLARE_READ16_MEMBER(m68k_shared_1_r); DECLARE_WRITE16_MEMBER(m68k_shared_1_w); DECLARE_READ16_MEMBER(dsp0_status_r); DECLARE_WRITE16_MEMBER(dsp0_control_w); DECLARE_READ_LINE_MEMBER(dsp0_bio_r); DECLARE_WRITE16_MEMBER(dsp0_bank_w); DECLARE_READ16_MEMBER(analog_r); virtual void machine_reset() override; virtual void video_start() override; virtual void video_reset() override; uint32_t screen_update_atarisy4(screen_device &screen, bitmap_rgb32 &bitmap, const rectangle &cliprect); INTERRUPT_GEN_MEMBER(vblank_int); void image_mem_to_screen( bool clip); void execute_gpu_command(); inline uint8_t hex_to_ascii(uint8_t in); void load_ldafile(address_space &space, const uint8_t *file); void load_hexfile(address_space &space, const uint8_t *file); void main_map(address_map &map); void dsp0_map(address_map &map); void dsp0_io_map(address_map &map); required_device m_maincpu; required_device m_dsp0; required_memory_bank m_dsp0_bank1; uint16_t m_dsp_bank[2]; uint8_t m_csr[2]; std::unique_ptr m_shared_ram[2]; private: required_device m_palette; required_device m_screen; required_shared_ptr m_m68k_ram; required_shared_ptr m_screen_ram; required_ioport_array<2> m_stick; std::unique_ptr m_renderer; gpu m_gpu; uint8_t m_r_color_table[256]; uint8_t m_g_color_table[256]; uint8_t m_b_color_table[256]; }; class airrace_state : public atarisy4_state { public: airrace_state(const machine_config &mconfig, device_type type, const char *tag) : atarisy4_state(mconfig, type, tag), m_dsp1(*this, "dsp1"), m_dsp1_bank1(*this, "dsp1_bank1") { } void init_airrace(); void airrace(machine_config &config); protected: DECLARE_READ16_MEMBER(dsp1_status_r); DECLARE_WRITE16_MEMBER(dsp1_control_w); DECLARE_READ_LINE_MEMBER(dsp1_bio_r); DECLARE_WRITE16_MEMBER(dsp1_bank_w); virtual void machine_reset() override; void airrace_map(address_map &map); void dsp1_map(address_map &map); void dsp1_io_map(address_map &map); private: required_device m_dsp1; required_memory_bank m_dsp1_bank1; }; /************************************* * * Video hardware * *************************************/ atarisy4_state::atarisy4_renderer::atarisy4_renderer(atarisy4_state &state, screen_device &screen) : poly_manager(screen, FLAG_NO_WORK_QUEUE), m_state(state) { } void atarisy4_state::video_start() { m_renderer = std::make_unique(*this, *m_screen); } void atarisy4_state::video_reset() { m_gpu.vblank_wait = 0; } uint32_t atarisy4_state::screen_update_atarisy4(screen_device &screen, bitmap_rgb32 &bitmap, const rectangle &cliprect) { int y; uint32_t offset = 0; if (m_gpu.bcrw & 0x80) { offset = 0; } else if (m_gpu.bcrx & 0x80) { offset = 0x10 << 5; } //uint32_t offset = m_gpu.dpr << 5; for (y = cliprect.min_y; y <= cliprect.max_y; ++y) { uint16_t *src = &m_screen_ram[(offset + (4096 * y)) / 2]; uint32_t *dest = &bitmap.pix32(y, cliprect.min_x); int x; for (x = cliprect.min_x; x < cliprect.max_x; x += 2) { uint16_t data = *src++; *dest++ = m_palette->pen(data & 0xff); *dest++ = m_palette->pen(data >> 8); } } return 0; } inline uint32_t atarisy4_state::gpu::xy_to_screen_addr(uint32_t x, uint32_t y) const { // uint32_t offset = ((mcr >> 4) & 3) << 9; uint32_t offset = 0; if (~bcrw & 0x80) { offset = 0; } else if (~bcrx & 0x80) { offset = 0x10 << 5; } return (y * 4096) + offset + x; } void atarisy4_state::image_mem_to_screen(bool clip) { int16_t y = m_gpu.gr[1] - 0x200; uint16_t h = m_gpu.gr[3]; if (h & 0x8000) h = -h; /* Not 100% sure of this */ while (h--) { uint16_t w = m_gpu.gr[2]; int16_t x = m_gpu.gr[0] - 0x400; if (w & 0x8000) w = -w; if (y >= 0 && y <= 511) { while (w--) { if (x >= 0 && x <= 511) { uint16_t pix = m_screen_ram[m_gpu.xy_to_screen_addr(x,y) >> 1]; if (x & 1) pix = (pix & (0x00ff)) | m_gpu.idr << 8; else pix = (pix & (0xff00)) | m_gpu.idr; m_screen_ram[m_gpu.xy_to_screen_addr(x,y) >> 1] = pix; } ++x; } } ++y; } } void atarisy4_state::atarisy4_renderer::draw_scanline(int32_t scanline, const extent_t &extent, const atarisy4_polydata &extradata, int threadid) { uint16_t color = extradata.color; int x; for (x = extent.startx; x < extent.stopx; ++x) { uint32_t addr = m_state.m_gpu.xy_to_screen_addr(x, scanline); uint16_t pix = extradata.screen_ram[addr >> 1]; if (x & 1) pix = (pix & (0x00ff)) | color << 8; else pix = (pix & (0xff00)) | color; extradata.screen_ram[addr >> 1] = pix; } } void atarisy4_state::atarisy4_renderer::draw_polygon(uint16_t color) { rectangle clip; vertex_t v1, v2, v3; atarisy4_polydata &extradata = object_data_alloc(); render_delegate rd_scan = render_delegate(&atarisy4_renderer::draw_scanline, this); clip.set(0, 511, 0, 511); extradata.color = color; extradata.screen_ram = m_state.m_screen_ram; v1.x = m_state.m_gpu.points[0].x; v1.y = m_state.m_gpu.points[0].y; v2.x = m_state.m_gpu.points[1].x; v2.y = m_state.m_gpu.points[1].y; /* Draw a triangle fan */ for (int i = 2; i <= m_state.m_gpu.pt_idx; ++i) { v3.x = m_state.m_gpu.points[i].x; v3.y = m_state.m_gpu.points[i].y; render_triangle(clip, rd_scan, 1, v1, v2, v3); v2 = v3; } } /* GPU commands REXP 0x00 Reset expansion SEXP 0x01 Set expansion ROFF 0x02 Reset offset on update SOFF 0x03 Set offset RTPS 0x04 Reset transposition STPS 0x05 Set transposition SIMD 0x06 Load IDR register SICD 0x07 Load partial transfer compare value RCW 0x08 Reset clipping window SCW 0x09 Set clipping window WVB 0x0B Wait for VBlank FXOT 0x10 Fill x offset table FYOT 0x11 Fill y offset table FERT 0x14 Fill expansion table FCT 0x15 Fill color table SMCT 0x16 Screen memory to color table ITSN 0x20 Image memory to screen memory transfer ITSC 0x21 Image memory to screen memory transfer with clip PPA 0x24 Plot point absolute PFOA 0x28 Polygon open absolute PFOR 0x29 Polygon open relative PFVA 0x2A Polygon vector absolute PFVR 0x2B Polygon vector relative PFC 0x2C Polygon close */ void atarisy4_state::execute_gpu_command() { switch (m_gpu.ecr) { case 0x04: { m_gpu.transpose = 0; break; } case 0x05: { m_gpu.transpose = 1; break; } case 0x06: { m_gpu.idr = m_gpu.gr[0]; break; } case 0x07: { m_gpu.icd = m_gpu.gr[0]; break; } case 0x09: { m_gpu.clip_max_x = m_gpu.gr[0]; m_gpu.clip_min_x = m_gpu.gr[1]; m_gpu.clip_max_y = m_gpu.gr[2]; m_gpu.clip_min_y = m_gpu.gr[3]; break; } case 0x0b: { // Wait for VBLANK and swap buffers? m_gpu.vblank_wait = 1; break; } case 0x16: { /* Copy screen RAM to color RAM GR0 : Color start X GR1 : Color start Y GR2 : Color table offset GR3 : Size GR4 : Channels to set (R: 0x10, G: 0x20, B: 0x40) */ int i; int offset = m_gpu.xy_to_screen_addr(m_gpu.gr[0] - 0x400, m_gpu.gr[1] - 0x200); int table_offs = m_gpu.gr[2]; for (i = 0; i < m_gpu.gr[3]; ++i) { uint16_t val = m_screen_ram[offset >> 1]; val >>= (~offset & 1) << 3; if (m_gpu.gr[4] & 0x10) m_r_color_table[table_offs] = val; if (m_gpu.gr[4] & 0x20) m_g_color_table[table_offs] = val; if (m_gpu.gr[4] & 0x40) m_b_color_table[table_offs] = val; /* Update */ m_palette->set_pen_color(table_offs, rgb_t(m_r_color_table[table_offs], m_g_color_table[table_offs], m_b_color_table[table_offs])); ++table_offs; ++offset; } break; } case 0x20: { image_mem_to_screen(false); break; } case 0x21: { image_mem_to_screen(true); break; } case 0x28: { m_gpu.points[0].x = m_gpu.gr[0] - 0x400; m_gpu.points[0].y = m_gpu.gr[1] - 0x200; m_gpu.pt_idx = 0; break; } case 0x29: { m_gpu.points[0].x = m_gpu.points[m_gpu.pt_idx].x + m_gpu.gr[0]; m_gpu.points[0].y = m_gpu.points[m_gpu.pt_idx].y + m_gpu.gr[1]; m_gpu.pt_idx = 0; break; } case 0x2a: { ++m_gpu.pt_idx; m_gpu.points[m_gpu.pt_idx].x = m_gpu.gr[0] - 0x400; m_gpu.points[m_gpu.pt_idx].y = m_gpu.gr[1] - 0x200; break; } case 0x2b: { uint16_t x = m_gpu.points[m_gpu.pt_idx].x + m_gpu.gr[0]; uint16_t y = m_gpu.points[m_gpu.pt_idx].y + m_gpu.gr[1]; ++m_gpu.pt_idx; m_gpu.points[m_gpu.pt_idx].x = x; m_gpu.points[m_gpu.pt_idx].y = y; break; } case 0x2c: { m_renderer->draw_polygon(m_gpu.gr[2]); m_renderer->wait(); break; } default: logerror("GPU COMMAND: %x\n", m_gpu.ecr); } } WRITE16_MEMBER(atarisy4_state::gpu_w) { switch (offset) { case 0x00: m_gpu.gr[0] = data; break; case 0x01: m_gpu.gr[1] = data; break; case 0x02: m_gpu.gr[2] = data; break; case 0x03: m_gpu.gr[3] = data; break; case 0x04: m_gpu.gr[4] = data; break; case 0x05: m_gpu.gr[5] = data; break; case 0x06: m_gpu.gr[6] = data; break; case 0x07: m_gpu.gr[7] = data; break; case 0x08: m_gpu.bcrw = data; break; case 0x09: m_gpu.bcrx = data; break; case 0x0a: m_gpu.bcry = data; break; case 0x0b: m_gpu.bcrz = data; break; case 0x0c: m_gpu.psrw = data; break; case 0x0d: m_gpu.psrx = data; break; case 0x0e: m_gpu.psry = data; break; case 0x0f: m_gpu.psrz = data; break; case 0x14: m_gpu.dpr = data; break; case 0x15: m_gpu.ctr = data; break; case 0x16: m_gpu.ifr = data; break; case 0x17: { m_gpu.ecr = data; execute_gpu_command(); break; } case 0x1a: m_gpu.far = data; break; case 0x20: { m_gpu.mcr = data; if (~data & 0x08) m_maincpu->set_input_line(6, CLEAR_LINE); break; } case 0x21: m_gpu.qlr = data; break; case 0x22: m_gpu.qar = data; break; } } READ16_MEMBER(atarisy4_state::gpu_r) { uint16_t res = 0; switch (offset) { case 0x08: res = m_gpu.bcrw; break; case 0x09: res = m_gpu.bcrx; break; case 0x0a: res = m_gpu.bcry; break; case 0x0b: res = m_gpu.bcrz; break; case 0x20: res = m_gpu.mcr; break; case 0x400: res = 5; break; // TODO! case 0x420: res = 5; break; default: logerror("GPU_R[%x]\n", offset); } return res; } INTERRUPT_GEN_MEMBER(atarisy4_state::vblank_int) { if (m_gpu.mcr & 0x08) m_maincpu->set_input_line(6, ASSERT_LINE); } /************************************* * * 68000<->TMS comms * *************************************/ READ16_MEMBER(atarisy4_state::m68k_shared_0_r) { if (!BIT(m_csr[0], 3)) return (m_shared_ram[0][offset]); else return 0xffff; } WRITE16_MEMBER(atarisy4_state::m68k_shared_0_w) { if (!BIT(m_csr[0], 3)) COMBINE_DATA(&m_shared_ram[0][offset]); } READ16_MEMBER(atarisy4_state::m68k_shared_1_r) { if (!BIT(m_csr[1], 3)) return (m_shared_ram[1][offset]); else return 0xffff; } WRITE16_MEMBER(atarisy4_state::m68k_shared_1_w) { if (!BIT(m_csr[1], 3)) COMBINE_DATA(&m_shared_ram[1][offset]); } READ16_MEMBER(atarisy4_state::dsp0_status_r) { return m_csr[0]; } WRITE16_MEMBER(atarisy4_state::dsp0_control_w) { m_dsp0->set_input_line(INPUT_LINE_RESET, data & 0x01 ? CLEAR_LINE : ASSERT_LINE); m_dsp0->set_input_line(0, data & 0x02 ? ASSERT_LINE : CLEAR_LINE); m_csr[0] = data; } READ_LINE_MEMBER(atarisy4_state::dsp0_bio_r) { return BIT(m_csr[0], 2); } WRITE16_MEMBER(atarisy4_state::dsp0_bank_w) { if (data & 0x4000) { /* Set TIDONE bit */ m_csr[0] |= 0x10; if (BIT(m_csr[0], 5) == 1) fatalerror("68000 interrupt enable was set!\n"); } data &= 0x3800; m_dsp0_bank1->set_base(&m_shared_ram[0][data]); m_dsp_bank[0] = data; } READ16_MEMBER(airrace_state::dsp1_status_r) { return m_csr[1]; } WRITE16_MEMBER(airrace_state::dsp1_control_w) { m_dsp1->set_input_line(INPUT_LINE_RESET, data & 0x01 ? CLEAR_LINE : ASSERT_LINE); m_dsp1->set_input_line(0, data & 0x02 ? ASSERT_LINE : CLEAR_LINE); m_csr[1] = data; } READ_LINE_MEMBER(airrace_state::dsp1_bio_r) { return BIT(m_csr[1], 2); } WRITE16_MEMBER(airrace_state::dsp1_bank_w) { if (data & 0x4000) { /* Set TIDONE bit */ m_csr[1] |= 0x10; if (BIT(m_csr[1], 5) == 1) fatalerror("68000 interrupt enable was set!\n"); } data &= 0x3800; m_dsp1_bank1->set_base(&m_shared_ram[1][data]); m_dsp_bank[1] = data; } /************************************* * * Main CPU memory map * *************************************/ void atarisy4_state::main_map(address_map &map) { map(0x000000, 0x00ffff).ram().share("m68k_ram"); map(0x010000, 0x01ffff).ram(); map(0x580000, 0x580001).portr("JOYSTICK"); map(0x588000, 0x588001).r(this, FUNC(atarisy4_state::analog_r)); map(0x598000, 0x598001).noprw(); /* Sound board */ map(0x7c0000, 0x7c4fff).rw(this, FUNC(atarisy4_state::m68k_shared_1_r), FUNC(atarisy4_state::m68k_shared_1_w)); map(0x7f0000, 0x7f4fff).rw(this, FUNC(atarisy4_state::m68k_shared_0_r), FUNC(atarisy4_state::m68k_shared_0_w)); map(0x7f6000, 0x7f6001).rw(this, FUNC(atarisy4_state::dsp0_status_r), FUNC(atarisy4_state::dsp0_control_w)); map(0xa00400, 0xbfffff).ram().share("screen_ram"); map(0xff8000, 0xff8fff).rw(this, FUNC(atarisy4_state::gpu_r), FUNC(atarisy4_state::gpu_w)); } void airrace_state::airrace_map(address_map &map) { main_map(map); map(0x7c6000, 0x7c6001).rw(this, FUNC(airrace_state::dsp1_status_r), FUNC(airrace_state::dsp1_control_w)); } /************************************* * * Mathbox DSP memory map * *************************************/ void atarisy4_state::dsp0_map(address_map &map) { map.global_mask(0xfff); map(0x0000, 0x07ff).bankrw("dsp0_bank0"); map(0x0800, 0x0fff).bankrw("dsp0_bank1"); } void atarisy4_state::dsp0_io_map(address_map &map) { map(0x00, 0x01).w(this, FUNC(atarisy4_state::dsp0_bank_w)); } /************************************* * * Mathbox DSP memory map * *************************************/ void airrace_state::dsp1_map(address_map &map) { map.global_mask(0xfff); map(0x0000, 0x07ff).bankrw("dsp1_bank0"); map(0x0800, 0x0fff).bankrw("dsp1_bank1"); } void airrace_state::dsp1_io_map(address_map &map) { map(0x00, 0x01).w(this, FUNC(airrace_state::dsp1_bank_w)); } /************************************* * * Input ports * *************************************/ READ16_MEMBER(atarisy4_state::analog_r) { return (m_stick[0]->read() << 8) | m_stick[1]->read(); } static INPUT_PORTS_START( atarisy4 ) PORT_START("JOYSTICK") PORT_BIT( 0x0001, IP_ACTIVE_LOW, IPT_JOYSTICKRIGHT_LEFT ) PORT_BIT( 0x0002, IP_ACTIVE_LOW, IPT_JOYSTICKRIGHT_RIGHT ) PORT_BIT( 0x0004, IP_ACTIVE_LOW, IPT_JOYSTICKRIGHT_DOWN ) PORT_BIT( 0x0008, IP_ACTIVE_LOW, IPT_JOYSTICKRIGHT_UP ) PORT_BIT( 0x0010, IP_ACTIVE_LOW, IPT_JOYSTICKLEFT_LEFT ) PORT_BIT( 0x0020, IP_ACTIVE_LOW, IPT_JOYSTICKLEFT_RIGHT ) PORT_BIT( 0x0040, IP_ACTIVE_LOW, IPT_JOYSTICKLEFT_DOWN ) PORT_BIT( 0x0080, IP_ACTIVE_LOW, IPT_JOYSTICKLEFT_UP ) PORT_BIT( 0x0100, IP_ACTIVE_LOW, IPT_BUTTON1 ) PORT_BIT( 0x0200, IP_ACTIVE_LOW, IPT_BUTTON2 ) PORT_BIT( 0x0400, IP_ACTIVE_LOW, IPT_UNUSED ) PORT_BIT( 0x0800, IP_ACTIVE_LOW, IPT_UNUSED ) PORT_BIT( 0x1000, IP_ACTIVE_LOW, IPT_BUTTON3 ) PORT_BIT( 0x2000, IP_ACTIVE_LOW, IPT_BUTTON4 ) PORT_BIT( 0x4000, IP_ACTIVE_LOW, IPT_BUTTON5 ) PORT_BIT( 0x8000, IP_ACTIVE_LOW, IPT_BUTTON6 ) PORT_START("STICKY") PORT_BIT( 0xff, 0x80, IPT_AD_STICK_Y ) PORT_SENSITIVITY(50) PORT_KEYDELTA(5) PORT_START("STICKX") PORT_BIT( 0xff, 0x80, IPT_AD_STICK_X ) PORT_SENSITIVITY(50) PORT_KEYDELTA(5) INPUT_PORTS_END /************************************* * * Machine driver * *************************************/ MACHINE_CONFIG_START(atarisy4_state::atarisy4) MCFG_DEVICE_ADD(m_maincpu, M68000, 8000000) MCFG_DEVICE_PROGRAM_MAP(main_map) MCFG_DEVICE_VBLANK_INT_DRIVER("screen", atarisy4_state, vblank_int) MCFG_DEVICE_ADD(m_dsp0, TMS32010, 16000000) MCFG_DEVICE_PROGRAM_MAP(dsp0_map) MCFG_DEVICE_IO_MAP(dsp0_io_map) MCFG_TMS32010_BIO_IN_CB(READLINE(*this, atarisy4_state, dsp0_bio_r)) MCFG_SCREEN_ADD("screen", RASTER) MCFG_SCREEN_RAW_PARAMS(32000000/2, 660, 0, 512, 404, 0, 384) MCFG_SCREEN_VIDEO_ATTRIBUTES(VIDEO_UPDATE_AFTER_VBLANK) MCFG_SCREEN_UPDATE_DRIVER(atarisy4_state, screen_update_atarisy4) MCFG_PALETTE_ADD("palette", 256) MACHINE_CONFIG_END MACHINE_CONFIG_START(airrace_state::airrace) atarisy4(config); MCFG_DEVICE_MODIFY("maincpu") MCFG_DEVICE_PROGRAM_MAP(airrace_map) MCFG_DEVICE_ADD(m_dsp1, TMS32010, 16000000) MCFG_DEVICE_PROGRAM_MAP(dsp1_map) MCFG_DEVICE_IO_MAP(dsp1_io_map) MCFG_TMS32010_BIO_IN_CB(READLINE(*this, airrace_state, dsp1_bio_r)) MACHINE_CONFIG_END /************************************* * * ROM definition(s) * *************************************/ ROM_START( laststar ) ROM_REGION( 0x20000, "code", 0 ) ROM_LOAD( "demo.hex", 0x00000, 0x1c2c4, CRC(7f9e344e) SHA1(ff1462f4f3fa01c47b74d365c240b1c3fdd36755) ) ROM_REGION( 0x20000, "data", 0 ) ROM_LOAD( "data1.hex", 0x00000, 0x077cb, CRC(0e75efc0) SHA1(badfcadd92625637bb3223bee986a29428c8d35a) ) ROM_REGION( 0x20000, "dsp", 0 ) ROM_LOAD( "mathbs.lda", 0x00000, 0x01e00, CRC(4378739a) SHA1(7c360da99a1366a3315f4846244ed3b2514ef7ec) ) ROM_REGION( 0x20000, "gfx", 0 ) ROM_LOAD( "2d_data", 0x00000, 0x077cb, NO_DUMP ) ROM_END ROM_START( airrace ) ROM_REGION( 0x30000, "code", 0 ) ROM_LOAD( "demo.hex", 0x00000, 0x25d23, CRC(937fa025) SHA1(c393a05645ad5df9268f03fffad294477e6f090b) ) ROM_REGION( 0x20000, "dsp", 0 ) ROM_LOAD( "mathbs.lda", 0x00000, 0x01e00, CRC(d215acd4) SHA1(853e792b343dc6bcb5b11d455af478a79edfd740) ) ROM_REGION( 0x20000, "gfx", 0 ) ROM_LOAD( "2d_data", 0x00000, 0x077cb, NO_DUMP ) ROM_END /************************************* * * Driver initialization * *************************************/ uint8_t atarisy4_state::hex_to_ascii(uint8_t in) { if (in < 0x3a) return in - 0x30; else if (in < 0x47) return in - 0x37; else return in; } void atarisy4_state::load_ldafile(address_space &space, const uint8_t *file) { #define READ_CHAR() file[i++] int i = 0; while (true) { uint8_t c; uint8_t sum = 1; uint16_t len; uint16_t addr; uint8_t pval = 0; if (READ_CHAR() != 0x01) fatalerror("Bad .LDA file\n"); if (READ_CHAR() != 0x00) fatalerror("Bad .LDA file\n"); len = READ_CHAR(); sum += len; c = READ_CHAR(); len |= c << 8; sum += c; /* End of file */ if (len == 6) break; addr = READ_CHAR(); sum += addr; c = READ_CHAR(); addr |= c << 8; sum += c; len -= 6; addr <<= 1; do { uint8_t data = READ_CHAR(); sum += data; if (addr & 1) space.write_word(addr >> 1, (pval << 8) | data); else pval = data; addr ++; } while (--len); sum += READ_CHAR(); if (sum != 0) fatalerror(".LDA checksum failure\n"); } } /* Load memory space with data from a Tektronix-Extended HEX file */ void atarisy4_state::load_hexfile(address_space &space, const uint8_t *file) { #define READ_HEX_CHAR() hex_to_ascii(file[i++]) uint32_t i = 0; uint32_t line = 1; bool end = false; while (true) { uint8_t len; uint8_t record; uint8_t checksum; uint8_t sum = 0; uint8_t addr_len; uint32_t addr = 0; /* Ignore blank lines */ while (file[i] == '\n') i++; /* First character of each line should be a '%' */ if (file[i++] != '%') fatalerror("Error on line %d - invalid line start character\n", line); /* Get the line length */ len = READ_HEX_CHAR() << 4; len |= READ_HEX_CHAR(); sum += len & 0xf; sum += len >> 4; /* Get the record type */ record = READ_HEX_CHAR(); sum += record; /* Record type */ if (record == 8) { end = true; } else if (record == 3) { /* Ignore this type */ i += len - 2; goto next_line; } else if (record != 6) { fatalerror("Error on line %d - Invalid record type %d\n", line, record); } /* Get the checksum for this line */ checksum = READ_HEX_CHAR() << 4; checksum |= READ_HEX_CHAR(); /* Get the number of address digits */ addr_len = READ_HEX_CHAR(); sum += addr_len; len = len - 6 - addr_len; /* Form the address */ while (addr_len) { uint8_t digit; addr <<= 4; digit = READ_HEX_CHAR(); sum += digit; addr |= digit; --addr_len; } /* Now read the data */ while (len) { uint8_t data; data = READ_HEX_CHAR() << 4; data |= READ_HEX_CHAR(); sum += data >> 4; sum += data & 0xf; if (record == 6) space.write_byte(addr++, data); len -= 2; } /* Eat the carriage return */ ++i; if (sum != checksum) fatalerror("Checksum mismatch on line %d (Found 0x%.2x but expected 0x%.2x)\n", line, sum, checksum); next_line: ++line; if (end == true) break; } } void atarisy4_state::init_laststar() { address_space &main = m_maincpu->space(AS_PROGRAM); /* Allocate 16kB of shared RAM */ m_shared_ram[0] = make_unique_clear(0x2000); /* Populate the 68000 address space with data from the HEX files */ load_hexfile(main, memregion("code")->base()); load_hexfile(main, memregion("data")->base()); /* Set up the DSP */ membank("dsp0_bank0")->set_base(m_shared_ram[0].get()); m_dsp0_bank1->set_base(&m_shared_ram[0][0x800]); load_ldafile(m_dsp0->space(AS_PROGRAM), memregion("dsp")->base()); } void airrace_state::init_airrace() { /* Allocate two sets of 32kB shared RAM */ m_shared_ram[0] = make_unique_clear(0x4000); m_shared_ram[1] = make_unique_clear(0x4000); /* Populate RAM with data from the HEX files */ load_hexfile(m_maincpu->space(AS_PROGRAM), memregion("code")->base()); /* Set up the first DSP */ membank("dsp0_bank0")->set_base(m_shared_ram[0].get()); m_dsp0_bank1->set_base(&m_shared_ram[0][0x800]); load_ldafile(m_dsp0->space(AS_PROGRAM), memregion("dsp")->base()); /* Set up the second DSP */ membank("dsp1_bank0")->set_base(m_shared_ram[1].get()); m_dsp1_bank1->set_base(&m_shared_ram[1][0x800]); load_ldafile(m_dsp1->space(AS_PROGRAM), memregion("dsp")->base()); } void atarisy4_state::machine_reset() { m_dsp0->set_input_line(INPUT_LINE_RESET, ASSERT_LINE); } void airrace_state::machine_reset() { atarisy4_state::machine_reset(); m_dsp1->set_input_line(INPUT_LINE_RESET, ASSERT_LINE); } /************************************* * * Game driver(s) * *************************************/ GAME( 1984, laststar, 0, atarisy4, atarisy4, atarisy4_state, init_laststar, ROT0, "Atari Games", "The Last Starfighter (prototype)", MACHINE_IMPERFECT_GRAPHICS | MACHINE_NO_SOUND_HW ) GAME( 1985, airrace, 0, airrace, atarisy4, airrace_state, init_airrace, ROT0, "Atari Games", "Air Race (prototype)", MACHINE_IMPERFECT_GRAPHICS | MACHINE_NO_SOUND_HW )