// license:BSD-3-Clause // copyright-holders:Anthony Kruize, Wilbert Pol /*************************************************************************** File to handle video emulation of the Bandai WonderSwan VDP. Anthony Kruize Wilbert Pol TODO: - split the Color VDP from the Mono VDP - Add support for WSC high/low contrast (register 14, bit 1) ***************************************************************************/ #include "emu.h" #include "wswan.h" #include "screen.h" DEFINE_DEVICE_TYPE(WSWAN_VIDEO, wswan_video_device, "wswan_video", "Bandai WonderSwam VDP") wswan_video_device::wswan_video_device(const machine_config &mconfig, const char *tag, device_t *owner, u32 clock) : device_t(mconfig, WSWAN_VIDEO, tag, owner, clock) , device_video_interface(mconfig, *this) , m_set_irq_cb(*this) , m_snd_dma_cb(*this) , m_vdp_type(VDP_TYPE_WSWAN) , m_icons_cb(*this) { } wswan_video_device::~wswan_video_device() { } void wswan_video_device::common_save() { save_item(NAME(m_bitmap)); save_item(NAME(m_vram)); save_item(NAME(m_palette_port)); save_item(NAME(m_pal)); save_item(NAME(m_regs)); save_item(NAME(m_layer_bg_enable)); save_item(NAME(m_layer_fg_enable)); save_item(NAME(m_sprites_enable)); save_item(NAME(m_window_sprites_enable)); save_item(NAME(m_window_fg_mode)); save_item(NAME(m_bg_control)); save_item(NAME(m_current_line)); save_item(NAME(m_line_compare)); save_item(NAME(m_sprite_table_address)); save_item(NAME(m_sprite_table_buffer)); save_item(NAME(m_sprite_first)); save_item(NAME(m_sprite_count)); save_item(NAME(m_sprite_first_latch)); save_item(NAME(m_sprite_count_latch)); save_item(NAME(m_layer_bg_address)); save_item(NAME(m_layer_fg_address)); save_item(NAME(m_window_fg_left)); save_item(NAME(m_window_fg_top)); save_item(NAME(m_window_fg_right)); save_item(NAME(m_window_fg_bottom)); save_item(NAME(m_window_sprites_left)); save_item(NAME(m_window_sprites_top)); save_item(NAME(m_window_sprites_right)); save_item(NAME(m_window_sprites_bottom)); save_item(NAME(m_layer_bg_scroll_x)); save_item(NAME(m_layer_bg_scroll_y)); save_item(NAME(m_layer_fg_scroll_x)); save_item(NAME(m_layer_fg_scroll_y)); save_item(NAME(m_lcd_control)); save_item(NAME(m_color_mode)); save_item(NAME(m_colors_16)); save_item(NAME(m_tile_packed)); save_item(NAME(m_timer_hblank_enable)); save_item(NAME(m_timer_hblank_mode)); save_item(NAME(m_timer_hblank_reload)); save_item(NAME(m_timer_hblank_count)); save_item(NAME(m_timer_vblank_enable)); save_item(NAME(m_timer_vblank_mode)); save_item(NAME(m_timer_vblank_reload)); save_item(NAME(m_timer_vblank_count)); save_item(NAME(m_main_palette)); } void wswan_video_device::device_start() { screen().register_screen_bitmap(m_bitmap); m_timer = timer_alloc(FUNC(wswan_video_device::scanline_interrupt), this); m_timer->adjust(attotime::from_ticks(256, clock()), 0, attotime::from_ticks(256, clock())); // bind callbacks m_set_irq_cb.resolve(); m_snd_dma_cb.resolve(); if (m_vdp_type == VDP_TYPE_WSC) { m_vram.resize(WSC_VRAM_SIZE); m_palette_vram = &m_vram[WSC_VRAM_PALETTE]; } else { m_vram.resize(WS_VRAM_SIZE); m_palette_vram = &m_vram[0]; } std::fill(std::begin(m_vram), std::end(m_vram), 0); common_save(); m_icons_cb.resolve(); } void wswan_video_device::device_reset() { m_layer_bg_enable = 0; m_layer_fg_enable = 0; m_sprites_enable = 0; m_window_sprites_enable = 0; m_window_fg_mode = 0; m_bg_control = 0; m_current_line = 0; m_line_compare = 0; m_sprite_table_address = 0; m_sprite_first = 0; m_sprite_count = 0; m_sprite_first_latch = 0; m_sprite_count_latch = 0; m_layer_bg_address = 0; m_layer_fg_address = 0; m_window_fg_left = 0; m_window_fg_top = 0; m_window_fg_right = 0; m_window_fg_bottom = 0; m_window_sprites_left = 0; m_window_sprites_top = 0; m_window_sprites_right = 0; m_window_sprites_bottom = 0; m_layer_bg_scroll_x = 0; m_layer_bg_scroll_y = 0; m_layer_fg_scroll_x = 0; m_layer_fg_scroll_y = 0; m_lcd_control = 0; m_color_mode = 0; m_colors_16 = 0; m_tile_packed = 0; m_timer_hblank_enable = 0; m_timer_hblank_mode = 0; m_timer_hblank_reload = 0; m_timer_hblank_count = 0; m_timer_vblank_enable = 0; m_timer_vblank_mode = 0; m_timer_vblank_reload = 0; m_timer_vblank_count = 0; std::fill(std::begin(m_sprite_table_buffer), std::end(m_sprite_table_buffer), 0); std::fill(std::begin(m_main_palette), std::end(m_main_palette), 0); std::fill(std::begin(m_regs), std::end(m_regs), 0); std::fill(std::begin(m_palette_port), std::end(m_palette_port), 0); setup_palettes(); } void wswan_video_device::setup_palettes() { if (m_color_mode) { for (int i = 0; i < 16; i++) for (int j = 0; j < 16; j++) m_pal[i][j] = m_palette_vram[(i << 4) + j] & 0x0fff; } else { for (int i = 0; i < 16; i++) { m_pal[i][0] = (m_palette_port[i] >> 0) & 0x07; m_pal[i][1] = (m_palette_port[i] >> 4) & 0x07; m_pal[i][2] = (m_palette_port[i] >> 8) & 0x07; m_pal[i][3] = (m_palette_port[i] >> 12) & 0x07; } } } inline u16 wswan_video_device::swap_bytes(u16 word) { return (word << 8) | (word >> 8); } void wswan_video_device::draw_background() { const u16 map_addr = m_layer_bg_address + (((m_current_line + m_layer_bg_scroll_y) & 0xf8) << 2); const u8 start_column = (m_layer_bg_scroll_x >> 3); for (int column = 0; column < 29; column++) { u32 plane0 = 0, plane1 = 0, plane2 = 0, plane3 = 0; int x_offset, tile_line; const u16 tile_data = m_vram[map_addr + ((start_column + column) & 0x1f)]; const u16 tile_number = tile_data & 0x01ff; const u16 tile_palette = (tile_data >> 9) & 0x0f; tile_line = (m_current_line + m_layer_bg_scroll_y) & 0x07; if (tile_data & 0x8000) // vflip tile_line = 7 - tile_line; if (m_colors_16) { const u16 tile_address = ((tile_data & 0x2000) ? 0x4000 : 0x2000) + (tile_number * 16) + (tile_line << 1); if (m_tile_packed) { plane0 = (swap_bytes(m_vram[tile_address]) << 16) | swap_bytes(m_vram[tile_address + 1]); } else { plane0 = m_vram[tile_address] & 0xff; plane1 = (m_vram[tile_address] & 0xff00) >> 7; plane2 = (m_vram[tile_address + 1] & 0xff) << 2; plane3 = (m_vram[tile_address + 1] & 0xff00) >> 5; } } else { const u16 tile_address = 0x1000 + (tile_number * 8) + tile_line; if (m_tile_packed) { plane0 = m_vram[tile_address]; } else { plane0 = m_vram[tile_address] & 0xff; plane1 = (m_vram[tile_address] & 0xff00) >> 7; plane2 = 0; plane3 = 0; } } for (int x = 0; x < 8; x++) { int col; if (m_tile_packed) { if (m_colors_16) { col = plane0 & 0x0f; plane0 = plane0 >> 4; } else { col = plane0 & 0x03; plane0 = plane0 >> 2; } } else { col = (plane3 & 8) | (plane2 & 4) | (plane1 & 2) | (plane0 & 1); plane3 = plane3 >> 1; plane2 = plane2 >> 1; plane1 = plane1 >> 1; plane0 = plane0 >> 1; } if (tile_data & 0x4000) x_offset = x + (column << 3) - (m_layer_bg_scroll_x & 0x07); else x_offset = 7 - x + (column << 3) - (m_layer_bg_scroll_x & 0x07); if (x_offset >= 0 && x_offset < WSWAN_X_PIXELS) { if (m_colors_16) { if (col) { m_bitmap.pix(m_current_line, x_offset) = m_pal[tile_palette][col]; } } else { if (col || !(tile_palette & 4)) { if (m_color_mode) m_bitmap.pix(m_current_line, x_offset) = m_pal[tile_palette][col]; else m_bitmap.pix(m_current_line, x_offset) = m_main_palette[m_pal[tile_palette][col]]; } } } } } } void wswan_video_device::draw_foreground_0() { const u16 map_addr = m_layer_fg_address + (((m_current_line + m_layer_fg_scroll_y) & 0xf8) << 2); const u8 start_column = (m_layer_fg_scroll_x >> 3); for (int column = 0; column < 29; column++) { u32 plane0 = 0, plane1 = 0, plane2 = 0, plane3 = 0; int x_offset, tile_line; const u16 tile_data = m_vram[map_addr + ((start_column + column) & 0x1f)]; const u16 tile_number = tile_data & 0x01ff; const u16 tile_palette = (tile_data >> 9) & 0x0f; tile_line = (m_current_line + m_layer_fg_scroll_y) & 0x07; if (tile_data & 0x8000) // vflip tile_line = 7 - tile_line; if (m_colors_16) { const u16 tile_address = ((tile_data & 0x2000) ? 0x4000 : 0x2000) + (tile_number * 16) + (tile_line << 1); if (m_tile_packed) { plane0 = (swap_bytes(m_vram[tile_address]) << 16) | swap_bytes(m_vram[tile_address + 1]); } else { plane0 = m_vram[tile_address] & 0xff; plane1 = (m_vram[tile_address] & 0xff00) >> 7; plane2 = (m_vram[tile_address + 1] & 0xff) << 2; plane3 = (m_vram[tile_address + 1] & 0xff00) >> 5; } } else { const u16 tile_address = 0x1000 + (tile_number * 8) + tile_line; if (m_tile_packed) { plane0 = m_vram[tile_address]; } else { plane0 = m_vram[tile_address] & 0xff; plane1 = (m_vram[tile_address] & 0xff00) >> 7; plane2 = 0; plane3 = 0; } } for (int x = 0; x < 8; x++ ) { int col; if (m_tile_packed) { if (m_colors_16) { col = plane0 & 0x0f; plane0 = plane0 >> 4; } else { col = plane0 & 0x03; plane0 = plane0 >> 2; } } else { col = (plane3 & 8) | (plane2 & 4) | (plane1 & 2) | (plane0 & 1); plane3 = plane3 >> 1; plane2 = plane2 >> 1; plane1 = plane1 >> 1; plane0 = plane0 >> 1; } if (tile_data & 0x4000) x_offset = x + (column << 3) - (m_layer_fg_scroll_x & 0x07); else x_offset = 7 - x + (column << 3) - (m_layer_fg_scroll_x & 0x07); if (x_offset >= 0 && x_offset < WSWAN_X_PIXELS) { if (m_colors_16) { if (col) { m_bitmap.pix(m_current_line, x_offset) = m_pal[tile_palette][col]; } } else { if (col || !(tile_palette & 4)) { if (m_color_mode) m_bitmap.pix(m_current_line, x_offset) = m_pal[tile_palette][col]; else m_bitmap.pix(m_current_line, x_offset) = m_main_palette[m_pal[tile_palette][col]]; } } } } } } void wswan_video_device::draw_foreground_2() { const u16 map_addr = m_layer_fg_address + (((m_current_line + m_layer_fg_scroll_y) & 0xf8) << 2); const u8 start_column = (m_layer_fg_scroll_x >> 3); for (int column = 0; column < 29; column++) { u32 plane0 = 0, plane1 = 0, plane2 = 0, plane3 = 0; int x_offset, tile_line; const u16 tile_data = m_vram[map_addr + ((start_column + column) & 0x1f)]; const u16 tile_number = tile_data & 0x01ff; const u16 tile_palette = (tile_data >> 9) & 0x0f; tile_line = (m_current_line + m_layer_fg_scroll_y) & 0x07; if (tile_data & 0x8000) // vflip tile_line = 7 - tile_line; if (m_colors_16) { const u16 tile_address = ((tile_data & 0x2000) ? 0x4000 : 0x2000) + (tile_number * 16) + (tile_line << 1); if (m_tile_packed) { plane0 = (swap_bytes(m_vram[tile_address]) << 16) | swap_bytes(m_vram[tile_address + 1]); } else { plane0 = m_vram[tile_address] & 0xff; plane1 = (m_vram[tile_address] & 0xff00) >> 7; plane2 = (m_vram[tile_address + 1] & 0xff) << 2; plane3 = (m_vram[tile_address + 1] & 0xff00) >> 5; } } else { const u16 tile_address = 0x1000 + (tile_number * 8) + tile_line; if (m_tile_packed) { plane0 = m_vram[tile_address]; } else { plane0 = m_vram[tile_address] & 0xff; plane1 = (m_vram[tile_address] & 0xff00) >> 7; plane2 = 0; plane3 = 0; } } for (int x = 0; x < 8; x++) { int col; if (m_tile_packed) { if (m_colors_16) { col = plane0 & 0x0f; plane0 = plane0 >> 4; } else { col = plane0 & 0x03; plane0 = plane0 >> 2; } } else { col = (plane3 & 8) | (plane2 & 4) | (plane1 & 2) | (plane0 & 1); plane3 = plane3 >> 1; plane2 = plane2 >> 1; plane1 = plane1 >> 1; plane0 = plane0 >> 1; } if (tile_data & 0x4000) x_offset = x + (column << 3) - (m_layer_fg_scroll_x & 0x07); else x_offset = 7 - x + (column << 3) - (m_layer_fg_scroll_x & 0x07); if (x_offset >= 0 && x_offset >= m_window_fg_left && x_offset <= m_window_fg_right && x_offset < WSWAN_X_PIXELS) { if (m_colors_16) { if (col) { m_bitmap.pix(m_current_line, x_offset) = m_pal[tile_palette][col]; } } else { if (col || !(tile_palette & 4)) { if (m_color_mode) m_bitmap.pix(m_current_line, x_offset) = m_pal[tile_palette][col]; else m_bitmap.pix(m_current_line, x_offset) = m_main_palette[m_pal[tile_palette][col]]; } } } } } } void wswan_video_device::draw_foreground_3() { const u16 map_addr = m_layer_fg_address + (((m_current_line + m_layer_fg_scroll_y) & 0xf8) << 2); const u8 start_column = (m_layer_fg_scroll_x >> 3); for (int column = 0; column < 29; column++) { u32 plane0 = 0, plane1 = 0, plane2 = 0, plane3 = 0; int x_offset, tile_line; const u16 tile_data = m_vram[map_addr + ((start_column + column) & 0x1f)]; const u16 tile_number = tile_data & 0x01ff; const u16 tile_palette = (tile_data >> 9) & 0x0f; tile_line = (m_current_line + m_layer_fg_scroll_y) & 0x07; if (tile_data & 0x8000) // vflip tile_line = 7 - tile_line; if (m_colors_16) { const u16 tile_address = ((tile_data & 0x2000) ? 0x4000 : 0x2000) + (tile_number * 16) + (tile_line << 1); if (m_tile_packed) { plane0 = (swap_bytes(m_vram[tile_address]) << 16) | swap_bytes(m_vram[tile_address + 1]); } else { plane0 = m_vram[tile_address] & 0xff; plane1 = (m_vram[tile_address] & 0xff00) >> 7; plane2 = (m_vram[tile_address + 1] & 0xff) << 2; plane3 = (m_vram[tile_address + 1] & 0xff00) >> 5; } } else { const u16 tile_address = 0x1000 + (tile_number * 8) + tile_line; if (m_tile_packed) { plane0 = m_vram[tile_address]; } else { plane0 = m_vram[tile_address] & 0xff; plane1 = (m_vram[tile_address] & 0xff00) >> 7; plane2 = 0; plane3 = 0; } } for (int x = 0; x < 8; x++) { int col; if (m_tile_packed) { if (m_colors_16) { col = plane0 & 0x0f; plane0 = plane0 >> 4; } else { col = plane0 & 0x03; plane0 = plane0 >> 2; } } else { col = (plane3 & 8) | (plane2 & 4) | (plane1 & 2) | (plane0 & 1); plane3 = plane3 >> 1; plane2 = plane2 >> 1; plane1 = plane1 >> 1; plane0 = plane0 >> 1; } if (tile_data & 0x4000) x_offset = x + (column << 3) - (m_layer_fg_scroll_x & 0x07); else x_offset = 7 - x + (column << 3) - (m_layer_fg_scroll_x & 0x07); if ((x_offset >= 0 && x_offset < m_window_fg_left) || (x_offset > m_window_fg_right && x_offset < WSWAN_X_PIXELS)) { if (m_colors_16) { if (col) { m_bitmap.pix(m_current_line, x_offset) = m_pal[tile_palette][col]; } } else { if (col || !(tile_palette & 4)) { if (m_color_mode) m_bitmap.pix(m_current_line, x_offset) = m_pal[tile_palette][col]; else m_bitmap.pix(m_current_line, x_offset) = m_main_palette[m_pal[tile_palette][col]]; } } } } } } void wswan_video_device::handle_sprites(int mask) { if (m_sprite_count == 0) return; for (int i = m_sprite_first + m_sprite_count - 1; i >= m_sprite_first; i--) { const u16 tile_data = m_sprite_table_buffer[i * 2]; const u8 y = m_sprite_table_buffer[(i * 2) + 1] & 0xff; const u8 x = m_sprite_table_buffer[(i * 2) + 1] >> 8; int tile_line = (m_current_line - y) & 0xff; if ((tile_line >= 0) && (tile_line < 8) && ((tile_data & 0x2000) == mask)) { u32 plane0 = 0, plane1 = 0, plane2 = 0, plane3 = 0; int x_offset; const int tile_number = tile_data & 0x01ff; const int tile_palette = 8 + ((tile_data >> 9) & 0x07); int check_clip = 0; if (tile_data & 0x8000) tile_line = 7 - tile_line; if (m_colors_16) { const u16 tile_address = 0x2000 + (tile_number * 16) + (tile_line << 1); if (m_tile_packed) { plane0 = (swap_bytes(m_vram[tile_address]) << 16) | swap_bytes(m_vram[tile_address + 1]); } else { plane0 = m_vram[tile_address] & 0xff; plane1 = (m_vram[tile_address] & 0xff00) >> 7; plane2 = (m_vram[tile_address + 1] & 0xff) << 2; plane3 = (m_vram[tile_address + 1] & 0xff00) >> 5; } } else { const u16 tile_address = 0x1000 + (tile_number * 8) + tile_line; if (m_tile_packed) { plane0 = m_vram[tile_address]; } else { plane0 = m_vram[tile_address] & 0xff; plane1 = (m_vram[tile_address] & 0xff00) >> 7; plane2 = 0; plane3 = 0; } } if (m_window_sprites_enable) { if (tile_data & 0x1000) { if (m_current_line >= m_window_sprites_top && m_current_line <= m_window_sprites_bottom) check_clip = 1; } else { if (m_current_line < m_window_sprites_top || m_current_line > m_window_sprites_bottom) continue; } } for (int j = 0; j < 8; j++) { int col; if (m_tile_packed) { if (m_colors_16) { col = plane0 & 0x0f; plane0 = plane0 >> 4; } else { col = plane0 & 0x03; plane0 = plane0 >> 2; } } else { col = (plane3 & 8) | (plane2 & 4) | (plane1 & 2) | (plane0 & 1); plane3 = plane3 >> 1; plane2 = plane2 >> 1; plane1 = plane1 >> 1; plane0 = plane0 >> 1; } if (tile_data & 0x4000) x_offset = x + j; else x_offset = x + 7 - j; x_offset = x_offset & 0xff; if (m_window_sprites_enable) { if (tile_data & 0x1000 && check_clip) { if (x_offset >= m_window_sprites_left && x_offset <= m_window_sprites_right) continue; } else { if (x_offset < m_window_sprites_left || x_offset > m_window_sprites_right) { // continue; } } } if (x_offset >= 0 && x_offset < WSWAN_X_PIXELS) { if (m_colors_16) { if (col) { m_bitmap.pix(m_current_line, x_offset) = m_pal[tile_palette][col]; } } else { if (col || !(tile_palette & 4)) { if (m_color_mode) m_bitmap.pix(m_current_line, x_offset) = m_pal[tile_palette][col]; else m_bitmap.pix(m_current_line, x_offset) = m_main_palette[m_pal[tile_palette][col]]; } } } } } } } void wswan_video_device::refresh_scanline() { setup_palettes(); rectangle rec(0, WSWAN_X_PIXELS, m_current_line, m_current_line); if (m_lcd_control) { if (m_color_mode) m_bitmap.fill(m_pal[m_bg_control >> 4][m_bg_control & 0x0f], rec); else m_bitmap.fill(m_main_palette[m_bg_control & 0x07], rec); } else { m_bitmap.fill(0, rec); return; } // Draw background layer if (m_layer_bg_enable) draw_background(); // Draw sprites between background and foreground layers if (m_sprites_enable) handle_sprites(0); // Draw foreground layer, taking window settings into account if (m_layer_fg_enable) { switch (m_window_fg_mode) { case 0: // FG inside & outside window area draw_foreground_0(); break; case 1: // ??? logerror("Unknown foreground mode 1 set\n"); break; case 2: // FG only inside window area if (m_current_line >= m_window_fg_top && m_current_line <= m_window_fg_bottom) draw_foreground_2(); break; case 3: // FG only outside window area if (m_current_line < m_window_fg_top || m_current_line > m_window_fg_bottom) draw_foreground_0(); else draw_foreground_3(); break; } } // Draw sprites in front of foreground layer if (m_sprites_enable) handle_sprites(0x2000); } u32 wswan_video_device::screen_update(screen_device &screen, bitmap_ind16 &bitmap, const rectangle &cliprect) { copybitmap(bitmap, m_bitmap, 0, 0, 0, 0, cliprect); return 0; } u16 wswan_video_device::reg_r(offs_t offset, u16 mem_mask) { u16 value = m_regs[offset & 0x7f]; switch (offset) { case 0x02 / 2: return (value & 0xff00) | m_current_line; case 0xa8 / 2: return m_timer_hblank_count; case 0xaa / 2: return m_timer_vblank_count; } return value; } void wswan_video_device::reg_w(offs_t offset, u16 data, u16 mem_mask) { switch (offset) { case 0x00 / 2: // Display control // Bit 0 - Background layer enable // Bit 1 - Foreground layer enable // Bit 2 - Sprites enable // Bit 3 - Sprite window enable // Bit 4-5 - Foreground window configuration // 00 - Foreground layer is displayed inside and outside foreground window area // 01 - Unknown // 10 - Foreground layer is displayed only inside foreground window area // 11 - Foreground layer is displayed outside foreground window area // Bit 6-7 - Unknown if (ACCESSING_BITS_0_7) { m_layer_bg_enable = data & 0x1; m_layer_fg_enable = (data & 0x2) >> 1; m_sprites_enable = (data & 0x4) >> 2; m_window_sprites_enable = (data & 0x8) >> 3; m_window_fg_mode = (data & 0x30) >> 4; } // Background colour // In 16 colour mode: // Bit 0-3 - Palette index // Bit 4-7 - Palette number // Otherwise: // Bit 0-2 - Main palette index // Bit 3-7 - Unknown if (ACCESSING_BITS_8_15) m_bg_control = data >> 8; break; case 0x02 / 2: // Current scanline (read-only) if (ACCESSING_BITS_0_7) logerror("Write to current scanline! Current value: %d Data to write: %d\n", m_current_line, data); // Line compare if (ACCESSING_BITS_8_15) m_line_compare = data >> 8; break; case 0x04 / 2: // Sprite table base address // Bit 0-5 - Determine sprite table base address 0 0xxxxxx0 00000000 // Bit 6-7 - Unknown if (ACCESSING_BITS_0_7) { if (m_vdp_type == VDP_TYPE_WSC && !m_color_mode) m_sprite_table_address = (data & 0x3f) << 8; else m_sprite_table_address = (data & 0x1f) << 8; } // First sprite number (the one we start drawing with) if (ACCESSING_BITS_8_15) m_sprite_first_latch = data >> 8; break; case 0x06 / 2: // Number of sprites to draw if (ACCESSING_BITS_0_7) m_sprite_count_latch = data & 0xff; // Background/Foreground table base addresses // Bit 8-10 - Determine background table base address 00xxx000 00000000 (in bytes) // Bit 11 - Unknown // Bit 12-14 - Determine foreground table base address 00xxx000 00000000 (in bytes) // Bit 15 - Unknown if (ACCESSING_BITS_8_15) { m_layer_bg_address = (data & 0x0700) << 2; m_layer_fg_address = (data & 0x7000) >> 2; } break; case 0x08 / 2: // Left coordinate of foreground window if (ACCESSING_BITS_0_7) m_window_fg_left = data & 0xff; // Top coordinate of foreground window if (ACCESSING_BITS_8_15) m_window_fg_top = data >> 8; break; case 0x0a / 2: // Right coordinate of foreground window if (ACCESSING_BITS_0_7) m_window_fg_right = data & 0xff; // Bottom coordinate of foreground window if (ACCESSING_BITS_8_15) m_window_fg_bottom = data >> 8; break; case 0x0c / 2: // Left coordinate of sprite window if (ACCESSING_BITS_0_7) m_window_sprites_left = data & 0xff; // Top coordinate of sprite window if (ACCESSING_BITS_8_15) m_window_sprites_top = data >> 8; break; case 0x0e / 2: // Right coordinate of sprite window if (ACCESSING_BITS_0_7) m_window_sprites_right = data & 0xff; // Bottom coordinate of sprite window if (ACCESSING_BITS_8_15) m_window_sprites_bottom = data >> 8; break; case 0x10 / 2: // Background layer X scroll if (ACCESSING_BITS_0_7) m_layer_bg_scroll_x = data & 0xff; // Background layer Y scroll if (ACCESSING_BITS_8_15) m_layer_bg_scroll_y = data >> 8; break; case 0x12 / 2: // Foreground layer X scroll if (ACCESSING_BITS_0_7) m_layer_fg_scroll_x = data & 0xff; // Foreground layer Y scroll if (ACCESSING_BITS_8_15) m_layer_fg_scroll_y = data >> 8; break; case 0x14 / 2: // LCD control // Bit 0 - LCD enable // Bit 1 - WSC only, brightness low/high // Bit 2-7 - Unknown if (ACCESSING_BITS_0_7) m_lcd_control = data & 0xff; // LCD icons // Bit 8 - LCD sleep icon enable // Bit 9 - Vertical position icon enable // Bit 10 - Horizontal position icon enable // Bit 11 - Dot 1 icon enable // Bit 12 - Dot 2 icon enable // Bit 13 - Dot 3 icon enable // Bit 14-15 - Unknown if (ACCESSING_BITS_8_15) m_icons_cb(data >> 8); break; case 0x1c / 2: // Palette colors 0 and 1 // Bit 0-3 - Gray tone setting for main palette index 0 // Bit 4-7 - Gray tone setting for main palette index 1 if (ACCESSING_BITS_0_7) { if (m_vdp_type == VDP_TYPE_WSC) { int i = 15 - (data & 0x0f); int j = 15 - ((data >> 4) & 0x0f); m_main_palette[0] = (i << 8) | (i << 4) | i; m_main_palette[1] = (j << 8) | (j << 4) | j; } else { m_main_palette[0] = data & 0x0f; m_main_palette[1] = (data >> 4) & 0x0f; } } // Palette colors 2 and 3 // Bit 8-11 - Gray tone setting for main palette index 2 // Bit 12-15 - Gray tone setting for main palette index 3 if (ACCESSING_BITS_8_15) { if (m_vdp_type == VDP_TYPE_WSC) { int i = 15 - ((data >> 8) & 0x0f); int j = 15 - ((data >> 12) & 0x0f); m_main_palette[2] = (i << 8) | (i << 4) | i; m_main_palette[3] = (j << 8) | (j << 4) | j; } else { m_main_palette[2] = (data >> 8) & 0x0f; m_main_palette[3] = (data >> 12) & 0x0f; } } break; case 0x1e / 2: // Palette colors 4 and 5 // Bit 0-3 - Gray tone setting for main palette index 4 // Bit 4-7 - Gray tone setting for main palette index 5 if (ACCESSING_BITS_0_7) { if (m_vdp_type == VDP_TYPE_WSC) { int i = 15 - (data & 0x0f); int j = 15 - ((data >> 4) & 0x0f); m_main_palette[4] = (i << 8) | (i << 4) | i; m_main_palette[5] = (j << 8) | (j << 4) | j; } else { m_main_palette[4] = data & 0x0f; m_main_palette[5] = (data >> 4) & 0x0f; } } // Palette colors 6 and 7 // Bit 0-3 - Gray tone setting for main palette index 6 // Bit 4-7 - Gray tone setting for main palette index 7 if (ACCESSING_BITS_8_15) { if (m_vdp_type == VDP_TYPE_WSC) { int i = 15 - ((data >> 8) & 0x0f); int j = 15 - ((data >> 12) & 0x0f); m_main_palette[6] = (i << 8) | (i << 4) | i; m_main_palette[7] = (j << 8) | (j << 4) | j; } else { m_main_palette[6] = (data >> 8) & 0x0f; m_main_palette[7] = (data >> 12) & 0x0f; } } break; case 0x20 / 2: case 0x22 / 2: case 0x24 / 2: case 0x26 / 2: case 0x28 / 2: case 0x2a / 2: case 0x2c / 2: case 0x2e / 2: case 0x30 / 2: case 0x32 / 2: case 0x34 / 2: case 0x36 / 2: case 0x38 / 2: case 0x3a / 2: case 0x3c / 2: case 0x3e / 2: // 0x20-0x3f tile/sprite palette settings // Bit 0- 3 - Palette (offs & 0x1f)/2 index 0 // Bit 4- 7 - Palette (offs & 0x1f)/2 index 1 // Bit 8-11 - Palette (offs & 0x1f)/2 index 2 // Bit 12-15 - Palette (offs & 0x1f)/2 index 3 data &= 0x7777; COMBINE_DATA(&m_palette_port[offset & 0x0f]); break; case 0x60 / 2: // Video mode // Bit 0-4 - Unknown // Bit 5 - Packed mode 0 = not packed mode, 1 = packed mode // Bit 6 - 4/16 colour mode select: 0 = 4 colour mode, 1 = 16 colour mode // Bit 7 - monochrome/colour mode select: 0 = monochrome mode, 1 = colour mode // 111 - packed, 16 color, use 4000/8000, color // 110 - not packed, 16 color, use 4000/8000, color // 101 - packed, 4 color, use 2000, color // 100 - not packed, 4 color, use 2000, color // 011 - packed, 16 color, use 4000/8000, monochrome // 010 - not packed, 16 color , use 4000/8000, monochrome // 001 - packed, 4 color, use 2000, monochrome // 000 - not packed, 4 color, use 2000, monochrome - Regular WS monochrome if (ACCESSING_BITS_0_7) { if (m_vdp_type == VDP_TYPE_WSC) { m_color_mode = data & 0x80; m_colors_16 = data & 0x40; m_tile_packed = data & 0x20; } } break; case 0xa2 / 2: // Timer control // Bit 0 - HBlank Timer enable // Bit 1 - HBlank Timer mode: 0 = one shot, 1 = auto reset // Bit 2 - VBlank Timer(1/75s) enable // Bit 3 - VBlank Timer mode: 0 = one shot, 1 = auto reset // Bit 4-7 - Unknown if (ACCESSING_BITS_0_7) { m_timer_hblank_enable = BIT(data, 0); m_timer_hblank_mode = BIT(data, 1); m_timer_vblank_enable = BIT(data, 2); m_timer_vblank_mode = BIT(data, 3); } break; case 0xa4 / 2: // HBlank timer frequency reload value COMBINE_DATA(&m_timer_hblank_reload); m_timer_hblank_count = m_timer_hblank_reload; break; case 0xa6 / 2: // VBlank timer frequency reload value COMBINE_DATA(&m_timer_vblank_reload); m_timer_vblank_count = m_timer_vblank_reload; break; } COMBINE_DATA(&m_regs[offset & 0x7f]); } TIMER_CALLBACK_MEMBER(wswan_video_device::scanline_interrupt) { if (m_current_line < 144) refresh_scanline(); // Decrement 12kHz (HBlank) counter if (m_timer_hblank_enable && m_timer_hblank_reload != 0) { m_timer_hblank_count--; if (m_timer_hblank_count == 0) { if (m_timer_hblank_mode) m_timer_hblank_count = m_timer_hblank_reload; else m_timer_hblank_reload = 0; m_set_irq_cb(WSWAN_VIDEO_IFLAG_HBLTMR); } } // Handle Sound DMA m_snd_dma_cb(); if (m_current_line == 144) // buffer sprite table { memcpy(m_sprite_table_buffer, &m_vram[m_sprite_table_address], 512); m_sprite_first = m_sprite_first_latch; m_sprite_count = m_sprite_count_latch; } if (m_current_line == 144) { m_set_irq_cb(WSWAN_VIDEO_IFLAG_VBL); /* Decrement 75Hz (VBlank) counter */ if (m_timer_vblank_enable && m_timer_vblank_reload != 0) { m_timer_vblank_count--; if (m_timer_vblank_count == 0) { if (m_timer_vblank_mode) m_timer_vblank_count = m_timer_vblank_reload; else m_timer_vblank_reload = 0; m_set_irq_cb(WSWAN_VIDEO_IFLAG_VBLTMR); } } } if (m_current_line == m_line_compare) m_set_irq_cb(WSWAN_VIDEO_IFLAG_LCMP); m_current_line = (m_current_line + 1) % 159; } u16 wswan_video_device::vram_r(offs_t offset, u16 mem_mask) { return m_vram[offset]; } void wswan_video_device::vram_w(offs_t offset, u16 data, u16 mem_mask) { COMBINE_DATA(&m_vram[offset]); }