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Diffstat (limited to 'src/mame/video/tigeroad.c')
-rw-r--r--src/mame/video/tigeroad.c170
1 files changed, 170 insertions, 0 deletions
diff --git a/src/mame/video/tigeroad.c b/src/mame/video/tigeroad.c
new file mode 100644
index 00000000000..4dde2f86d12
--- /dev/null
+++ b/src/mame/video/tigeroad.c
@@ -0,0 +1,170 @@
+#include "driver.h"
+
+static int bgcharbank;
+static tilemap *bg_tilemap, *fg_tilemap;
+
+WRITE16_HANDLER( tigeroad_videoram_w )
+{
+ COMBINE_DATA(&videoram16[offset]);
+ tilemap_mark_tile_dirty(fg_tilemap, offset);
+}
+
+WRITE16_HANDLER( tigeroad_videoctrl_w )
+{
+ int bank;
+
+ if (ACCESSING_MSB)
+ {
+ data = (data >> 8) & 0xff;
+
+ /* bit 1 flips screen */
+
+ if (flip_screen != (data & 0x02))
+ {
+ flip_screen_set(data & 0x02);
+ tilemap_mark_all_tiles_dirty(ALL_TILEMAPS);
+ }
+
+ /* bit 2 selects bg char bank */
+
+ bank = (data & 0x04) >> 2;
+
+ if (bgcharbank != bank)
+ {
+ bgcharbank = bank;
+ tilemap_mark_all_tiles_dirty(bg_tilemap);
+ }
+
+ /* bits 4-5 are coin lockouts */
+
+ coin_lockout_w(0, !(data & 0x10));
+ coin_lockout_w(1, !(data & 0x20));
+
+ /* bits 6-7 are coin counters */
+
+ coin_counter_w(0, data & 0x40);
+ coin_counter_w(1, data & 0x80);
+ }
+}
+
+WRITE16_HANDLER( tigeroad_scroll_w )
+{
+ int scroll = 0;
+
+ COMBINE_DATA(&scroll);
+
+ switch (offset)
+ {
+ case 0:
+ tilemap_set_scrollx(bg_tilemap, 0, scroll);
+ break;
+ case 1:
+ tilemap_set_scrolly(bg_tilemap, 0, -scroll - 32 * 8);
+ break;
+ }
+}
+
+static void draw_sprites(running_machine *machine, mame_bitmap *bitmap, const rectangle *cliprect, int priority )
+{
+ UINT16 *source = &buffered_spriteram16[spriteram_size/2] - 4;
+ UINT16 *finish = buffered_spriteram16;
+
+ // TODO: The Track Map should probably be drawn on top of the background tilemap...
+ // Also convert the below into a for loop!
+
+ while (source >= finish)
+ {
+ int tile_number = source[0];
+
+ if (tile_number != 0xfff) {
+ int attr = source[1];
+ int sy = source[2] & 0x1ff;
+ int sx = source[3] & 0x1ff;
+
+ int flipx = attr & 0x02;
+ int flipy = attr & 0x01;
+ int color = (attr >> 2) & 0x0f;
+
+ if (sx > 0x100) sx -= 0x200;
+ if (sy > 0x100) sy -= 0x200;
+
+ if (flip_screen)
+ {
+ sx = 240 - sx;
+ sy = 240 - sy;
+ flipx = !flipx;
+ flipy = !flipy;
+ }
+
+ drawgfx(bitmap, machine->gfx[2],
+ tile_number,
+ color,
+ flipx, flipy,
+ sx, 240 - sy,
+ cliprect,
+ TRANSPARENCY_PEN, 15);
+ }
+
+ source -= 4;
+ }
+}
+
+static TILE_GET_INFO( get_bg_tile_info )
+{
+ UINT8 *tilerom = memory_region(REGION_GFX4);
+
+ int data = tilerom[tile_index];
+ int attr = tilerom[tile_index + 1];
+ int code = data + ((attr & 0xc0) << 2) + (bgcharbank << 10);
+ int color = attr & 0x0f;
+ int flags = (attr & 0x20) ? TILE_FLIPX : 0;
+
+ SET_TILE_INFO(1, code, color, flags);
+ tileinfo->group = (attr & 0x10) ? 1 : 0;
+}
+
+static TILE_GET_INFO( get_fg_tile_info )
+{
+ int data = videoram16[tile_index];
+ int attr = data >> 8;
+ int code = (data & 0xff) + ((attr & 0xc0) << 2) + ((attr & 0x20) << 5);
+ int color = attr & 0x0f;
+ int flags = (attr & 0x10) ? TILE_FLIPY : 0;
+
+ SET_TILE_INFO(0, code, color, flags);
+}
+
+static TILEMAP_MAPPER( tigeroad_tilemap_scan )
+{
+ /* logical (col,row) -> memory offset */
+ return 2 * (col % 8) + 16 * ((127 - row) % 8) + 128 * (col / 8) + 2048 * ((127 - row) / 8);
+}
+
+VIDEO_START( tigeroad )
+{
+ bg_tilemap = tilemap_create(get_bg_tile_info, tigeroad_tilemap_scan,
+ TILEMAP_TYPE_PEN, 32, 32, 128, 128);
+
+ fg_tilemap = tilemap_create(get_fg_tile_info, tilemap_scan_rows,
+ TILEMAP_TYPE_PEN, 8, 8, 32, 32);
+
+ tilemap_set_transmask(bg_tilemap, 0, 0xffff, 0);
+ tilemap_set_transmask(bg_tilemap, 1, 0x1ff, 0xfe00);
+
+ tilemap_set_transparent_pen(fg_tilemap, 3);
+}
+
+VIDEO_UPDATE( tigeroad )
+{
+ tilemap_draw(bitmap, cliprect, bg_tilemap, TILEMAP_DRAW_LAYER1, 0);
+ draw_sprites(machine, bitmap, cliprect, 0);
+ tilemap_draw(bitmap, cliprect, bg_tilemap, TILEMAP_DRAW_LAYER0, 1);
+ //draw_sprites(machine, bitmap, cliprect, 1); draw priority sprites?
+ tilemap_draw(bitmap, cliprect, fg_tilemap, 0, 2);
+ return 0;
+}
+
+VIDEO_EOF( tigeroad )
+{
+ buffer_spriteram16_w(0,0,0);
+}