// license:BSD-3-Clause // copyright-holders:BUT /* * Thunder Ceptor board * emulate video hardware */ #include "emu.h" #include "includes/tceptor.h" #define TX_TILE_OFFSET_CENTER (32 * 2) #define TX_TILE_OFFSET_RIGHT (32 * 0 + 2) #define TX_TILE_OFFSET_LEFT (32 * 31 + 2) #define SPR_TRANS_COLOR (0xff + 0x300) #define SPR_MASK_COLOR (0xfe + 0x300) /*******************************************************************/ PALETTE_INIT_MEMBER(tceptor_state, tceptor) { const uint8_t *color_prom = memregion("proms")->base(); int i; /* create a lookup table for the palette */ for (i = 0; i < 0x400; i++) { int r = pal4bit(color_prom[i + 0x000]); int g = pal4bit(color_prom[i + 0x400]); int b = pal4bit(color_prom[i + 0x800]); palette.set_indirect_color(i, rgb_t(r, g, b)); } /* color_prom now points to the beginning of the lookup table */ color_prom += 0xc00; /* color lookup table: 0- +1024 ( 4 * 256) colors: text (use 0- 256 colors) 1024- +1024 (16 * 64) colors: sprite (use 768- 256 colors) 2048- +512 ( 8 * 64) colors: bg (use 0- 512 colors) 3840- +256 ( 4 * 64) colors: road (use 512- 256 colors) */ /* tiles lookup table (1024 colors) */ for (i = 0; i < 0x0400; i++) { int ctabentry = color_prom[i]; palette.set_pen_indirect(i, ctabentry); } /* sprites lookup table (1024 colors) */ for (i = 0x0400; i < 0x0800; i++) { int ctabentry = color_prom[i] | 0x300; palette.set_pen_indirect(i, ctabentry); } /* background: no lookup PROM, use directly (512 colors) */ for (i = 0x0a00; i < 0x0c00; i++) { int ctabentry = i & 0x1ff; palette.set_pen_indirect(i, ctabentry); } /* road lookup table (256 colors) */ for (i = 0x0f00; i < 0x1000; i++) { int ctabentry = color_prom[i - 0x700] | 0x200; palette.set_pen_indirect(i, ctabentry); } /* setup sprite mask color map */ /* tceptor2: only 0x23 */ memset(m_is_mask_spr, 0, sizeof m_is_mask_spr); for (i = 0; i < 0x400; i++) if (palette.pen_indirect(i | 0x400) == SPR_MASK_COLOR) m_is_mask_spr[i >> 4] = 1; } /*******************************************************************/ inline int tceptor_state::get_tile_addr(int tile_index) { int x = tile_index / 28; int y = tile_index % 28; switch (x) { case 0: return TX_TILE_OFFSET_LEFT + y; case 33: return TX_TILE_OFFSET_RIGHT + y; } return TX_TILE_OFFSET_CENTER + (x - 1) + y * 32; } TILE_GET_INFO_MEMBER(tceptor_state::get_tx_tile_info) { int offset = get_tile_addr(tile_index); int code = m_tile_ram[offset]; int color = m_tile_attr[offset]; tileinfo.group = color; SET_TILE_INFO_MEMBER(0, code, color, 0); } void tceptor_state::tile_mark_dirty(int offset) { int x = -1; int y = -1; if (offset >= TX_TILE_OFFSET_LEFT && offset < TX_TILE_OFFSET_LEFT + 28) { x = 0; y = offset - TX_TILE_OFFSET_LEFT; } else if (offset >= TX_TILE_OFFSET_RIGHT && offset < TX_TILE_OFFSET_RIGHT + 28) { x = 33; y = offset - TX_TILE_OFFSET_RIGHT; } else if (offset >= TX_TILE_OFFSET_CENTER && offset < TX_TILE_OFFSET_CENTER + 32 * 28) { offset -= TX_TILE_OFFSET_CENTER; x = (offset % 32) + 1; y = offset / 32; } if (x >= 0) m_tx_tilemap->mark_tile_dirty(x * 28 + y); } WRITE8_MEMBER(tceptor_state::tceptor_tile_ram_w) { if (m_tile_ram[offset] != data) { m_tile_ram[offset] = data; tile_mark_dirty(offset); } } WRITE8_MEMBER(tceptor_state::tceptor_tile_attr_w) { if (m_tile_attr[offset] != data) { m_tile_attr[offset] = data; tile_mark_dirty(offset); } } /*******************************************************************/ TILE_GET_INFO_MEMBER(tceptor_state::get_bg1_tile_info) { uint16_t data = m_bg_ram[tile_index * 2] | (m_bg_ram[tile_index * 2 + 1] << 8); int code = (data & 0x3ff) | 0x000; int color = (data & 0xfc00) >> 10; SET_TILE_INFO_MEMBER(m_bg, code, color, 0); } TILE_GET_INFO_MEMBER(tceptor_state::get_bg2_tile_info) { uint16_t data = m_bg_ram[tile_index * 2 + 0x1000] | (m_bg_ram[tile_index * 2 + 1 + 0x1000] << 8); int code = (data & 0x3ff) | 0x400; int color = (data & 0xfc00) >> 10; SET_TILE_INFO_MEMBER(m_bg, code, color, 0); } WRITE8_MEMBER(tceptor_state::tceptor_bg_ram_w) { m_bg_ram[offset] = data; offset /= 2; if (offset < 0x800) m_bg1_tilemap->mark_tile_dirty(offset); else m_bg2_tilemap->mark_tile_dirty(offset - 0x800); } WRITE8_MEMBER(tceptor_state::tceptor_bg_scroll_w) { switch (offset) { case 0: m_bg1_scroll_x &= 0xff; m_bg1_scroll_x |= data << 8; break; case 1: m_bg1_scroll_x &= 0xff00; m_bg1_scroll_x |= data; break; case 2: m_bg1_scroll_y = data; break; case 4: m_bg2_scroll_x &= 0xff; m_bg2_scroll_x |= data << 8; break; case 5: m_bg2_scroll_x &= 0xff00; m_bg2_scroll_x |= data; break; case 6: m_bg2_scroll_y = data; break; } } /*******************************************************************/ void tceptor_state::decode_bg(const char * region) { static const gfx_layout bg_layout = { 8, 8, 2048, 3, { 0x40000+4, 0, 4 }, { 0, 1, 2, 3, 8, 9, 10, 11 }, { 0, 16, 32, 48, 64, 80, 96, 112 }, 128 }; int gfx_index = m_bg; uint8_t *src = memregion(region)->base() + 0x8000; int len = 0x8000; int i; std::vector buffer(len); /* expand rom tc2-19.10d */ for (i = 0; i < len / 2; i++) { buffer[i*2+1] = src[i] & 0x0f; buffer[i*2] = (src[i] & 0xf0) >> 4; } memcpy(src, &buffer[0], len); /* decode the graphics */ m_gfxdecode->set_gfx(gfx_index, std::make_unique(m_palette, bg_layout, memregion(region)->base(), 0, 64, 0x0a00)); } void tceptor_state::decode_sprite(int gfx_index, const gfx_layout *layout, const void *data) { /* decode the graphics */ m_gfxdecode->set_gfx(gfx_index, std::make_unique(m_palette, *layout, (const uint8_t *)data, 0, 64, 1024)); } // fix sprite order void tceptor_state::decode_sprite16(const char * region) { static const gfx_layout spr16_layout = { 16, 16, 512, 4, { 0x00000, 0x00004, 0x40000, 0x40004 }, { 0*8, 0*8+1, 0*8+2, 0*8+3, 1*8, 1*8+1, 1*8+2, 1*8+3, 2*8, 2*8+1, 2*8+2, 2*8+3, 3*8, 3*8+1, 3*8+2, 3*8+3 }, { 0*2*16, 1*2*16, 2*2*16, 3*2*16, 4*2*16, 5*2*16, 6*2*16, 7*2*16, 8*2*16, 9*2*16, 10*2*16, 11*2*16, 12*2*16, 13*2*16, 14*2*16, 15*2*16 }, 2*16*16 }; uint8_t *src = memregion(region)->base(); int len = memregion(region)->bytes(); int i, y; m_decoded_16 = std::make_unique(len); for (i = 0; i < len / (4*4*16); i++) for (y = 0; y < 16; y++) { memcpy(&m_decoded_16[(i*4 + 0) * (2*16*16/8) + y * (2*16/8)], &src[i * (2*32*32/8) + y * (2*32/8)], 4); memcpy(&m_decoded_16[(i*4 + 1) * (2*16*16/8) + y * (2*16/8)], &src[i * (2*32*32/8) + y * (2*32/8) + (4*8/8)], 4); memcpy(&m_decoded_16[(i*4 + 2) * (2*16*16/8) + y * (2*16/8)], &src[i * (2*32*32/8) + y * (2*32/8) + (16*2*32/8)], 4); memcpy(&m_decoded_16[(i*4 + 3) * (2*16*16/8) + y * (2*16/8)], &src[i * (2*32*32/8) + y * (2*32/8) + (4*8/8) + (16*2*32/8)], 4); } decode_sprite(m_sprite16, &spr16_layout, m_decoded_16.get()); } // fix sprite order void tceptor_state::decode_sprite32(const char * region) { static const gfx_layout spr32_layout = { 32, 32, 1024, 4, { 0x000000, 0x000004, 0x200000, 0x200004 }, { 0*8, 0*8+1, 0*8+2, 0*8+3, 1*8, 1*8+1, 1*8+2, 1*8+3, 2*8, 2*8+1, 2*8+2, 2*8+3, 3*8, 3*8+1, 3*8+2, 3*8+3, 4*8, 4*8+1, 4*8+2, 4*8+3, 5*8, 5*8+1, 5*8+2, 5*8+3, 6*8, 6*8+1, 6*8+2, 6*8+3, 7*8, 7*8+1, 7*8+2, 7*8+3 }, { 0*2*32, 1*2*32, 2*2*32, 3*2*32, 4*2*32, 5*2*32, 6*2*32, 7*2*32, 8*2*32, 9*2*32, 10*2*32, 11*2*32, 12*2*32, 13*2*32, 14*2*32, 15*2*32, 16*2*32, 17*2*32, 18*2*32, 19*2*32, 20*2*32, 21*2*32, 22*2*32, 23*2*32, 24*2*32, 25*2*32, 26*2*32, 27*2*32, 28*2*32, 29*2*32, 30*2*32, 31*2*32 }, 2*32*32 }; uint8_t *src = memregion(region)->base(); int len = memregion(region)->bytes(); int total = spr32_layout.total; int size = spr32_layout.charincrement / 8; int i; m_decoded_32 = make_unique_clear(len); for (i = 0; i < total; i++) { int code; code = (i & 0x07f) | ((i & 0x180) << 1) | 0x80; code &= ~((i & 0x200) >> 2); memcpy(&m_decoded_32[size * (i + 0)], &src[size * (code + 0)], size); memcpy(&m_decoded_32[size * (i + total)], &src[size * (code + total)], size); } decode_sprite(m_sprite32, &spr32_layout, m_decoded_32.get()); } void tceptor_state::video_start() { int gfx_index; m_sprite_ram_buffered = make_unique_clear(0x200/2); /* find first empty slot to decode gfx */ for (gfx_index = 0; gfx_index < MAX_GFX_ELEMENTS; gfx_index++) if (m_gfxdecode->gfx(gfx_index) == nullptr) break; assert(gfx_index + 4 <= MAX_GFX_ELEMENTS); m_bg = gfx_index++; decode_bg("gfx2"); m_sprite16 = gfx_index++; decode_sprite16("gfx3"); m_sprite32 = gfx_index++; decode_sprite32("gfx4"); /* allocate temp bitmaps */ m_screen->register_screen_bitmap(m_temp_bitmap); m_c45_road->set_transparent_color(m_palette->pen_indirect(0xfff)); m_tx_tilemap = &machine().tilemap().create(*m_gfxdecode, tilemap_get_info_delegate(FUNC(tceptor_state::get_tx_tile_info),this), TILEMAP_SCAN_COLS, 8, 8, 34, 28); m_tx_tilemap->set_scrollx(0, -2*8); m_tx_tilemap->set_scrolly(0, 0); m_tx_tilemap->configure_groups(*m_gfxdecode->gfx(0), 7); m_bg1_tilemap = &machine().tilemap().create(*m_gfxdecode, tilemap_get_info_delegate(FUNC(tceptor_state::get_bg1_tile_info),this), TILEMAP_SCAN_ROWS, 8, 8, 64, 32); m_bg2_tilemap = &machine().tilemap().create(*m_gfxdecode, tilemap_get_info_delegate(FUNC(tceptor_state::get_bg2_tile_info),this), TILEMAP_SCAN_ROWS, 8, 8, 64, 32); save_pointer(NAME(m_sprite_ram_buffered), 0x200 / 2); save_item(NAME(m_bg1_scroll_x)); save_item(NAME(m_bg1_scroll_y)); save_item(NAME(m_bg2_scroll_x)); save_item(NAME(m_bg2_scroll_y)); } /*******************************************************************/ /* Sprite data format 000: zzzzzzBB BTTTTTTT 002: ZZZZZZPP PPCCCCCC 100: fFL---YY YYYYYYYY 102: ------XX XXXXXXXX B: bank T: number P: priority C: color X: x Y: y L: large sprite F: flip x f: flip y Z: zoom x z: zoom y */ void tceptor_state::draw_sprites(bitmap_ind16 &bitmap, const rectangle &cliprect, int sprite_priority) { uint16_t *mem1 = &m_sprite_ram_buffered[0x000/2]; uint16_t *mem2 = &m_sprite_ram_buffered[0x100/2]; int need_mask = 0; int i; for (i = 0; i < 0x100; i += 2) { int scalex = (mem1[1 + i] & 0xfc00) << 1; int scaley = (mem1[0 + i] & 0xfc00) << 1; int pri = 7 - ((mem1[1 + i] & 0x3c0) >> 6); if (pri == sprite_priority && scalex && scaley) { int x = mem2[1 + i] & 0x3ff; int y = 512 - (mem2[0 + i] & 0x3ff); int flipx = mem2[0 + i] & 0x4000; int flipy = mem2[0 + i] & 0x8000; int color = mem1[1 + i] & 0x3f; int gfx; int code; if (mem2[0 + i] & 0x2000) { gfx = m_sprite32; code = mem1[0 + i] & 0x3ff; } else { gfx = m_sprite16; code = mem1[0 + i] & 0x1ff; scaley *= 2; } if (m_is_mask_spr[color]) { if (!need_mask) // backup previous bitmap copybitmap(m_temp_bitmap, bitmap, 0, 0, 0, 0, cliprect); need_mask = 1; } // round off scalex += 0x800; scaley += 0x800; x -= 64; y -= 78; m_gfxdecode->gfx(gfx)->zoom_transmask(bitmap, cliprect, code, color, flipx, flipy, x, y, scalex, scaley, m_palette->transpen_mask(*m_gfxdecode->gfx(gfx), color, SPR_TRANS_COLOR)); } } /* if SPR_MASK_COLOR pen is used, restore pixels from previous bitmap */ if (need_mask) { int x, y; for (x = cliprect.min_x; x <= cliprect.max_x; x++) for (y = cliprect.min_y; y <= cliprect.max_y; y++) if (m_palette->pen_indirect(bitmap.pix16(y, x)) == SPR_MASK_COLOR) // restore pixel bitmap.pix16(y, x) = m_temp_bitmap.pix16(y, x); } } uint32_t tceptor_state::screen_update_tceptor(screen_device &screen, bitmap_ind16 &bitmap, const rectangle &cliprect) { rectangle rect; int pri; int bg_center = 144 - ((((m_bg1_scroll_x + m_bg2_scroll_x ) & 0x1ff) - 288) / 2); // left background rect = cliprect; rect.max_x = bg_center; m_bg1_tilemap->set_scrollx(0, m_bg1_scroll_x + 12); m_bg1_tilemap->set_scrolly(0, m_bg1_scroll_y + 20); //32? m_bg1_tilemap->draw(screen, bitmap, rect, 0, 0); // right background rect.min_x = bg_center; rect.max_x = cliprect.max_x; m_bg2_tilemap->set_scrollx(0, m_bg2_scroll_x + 20); m_bg2_tilemap->set_scrolly(0, m_bg2_scroll_y + 20); // 32? m_bg2_tilemap->draw(screen, bitmap, rect, 0, 0); for (pri = 0; pri < 8; pri++) { m_c45_road->draw(bitmap, cliprect, pri * 2); m_c45_road->draw(bitmap, cliprect, pri * 2 + 1); draw_sprites(bitmap, cliprect, pri); } m_tx_tilemap->draw(screen, bitmap, cliprect, 0, 0); return 0; } WRITE_LINE_MEMBER(tceptor_state::screen_vblank_tceptor) { // rising edge if (state) { memcpy(m_sprite_ram_buffered.get(), m_sprite_ram, 0x200); if (m_m6809_irq_enable) m_maincpu->set_input_line(0, HOLD_LINE); else m_m6809_irq_enable = 1; if (m_m68k_irq_enable) m_subcpu->set_input_line(1, HOLD_LINE); if (m_mcu_irq_enable) m_mcu->set_input_line(0, HOLD_LINE); else m_mcu_irq_enable = 1; } } WRITE8_MEMBER(tceptor_state::tceptor2_shutter_w) { // 3D scope shutter control m_shutter = BIT(data, 0); }