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Diffstat (limited to 'src/mame/video/wswan.cpp')
-rw-r--r-- | src/mame/video/wswan.cpp | 1183 |
1 files changed, 0 insertions, 1183 deletions
diff --git a/src/mame/video/wswan.cpp b/src/mame/video/wswan.cpp deleted file mode 100644 index a845117e6b2..00000000000 --- a/src/mame/video/wswan.cpp +++ /dev/null @@ -1,1183 +0,0 @@ -// 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(TIMER_SCANLINE); - 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::device_timer(emu_timer &timer, device_timer_id id, int param, void *ptr) -{ - switch (id) - { - case TIMER_SCANLINE: - scanline_interrupt(); - break; - } -} - - -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]); -} - - -void 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]); -} |