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Diffstat (limited to 'src/mame/video/tehkanwc.c')
-rw-r--r--src/mame/video/tehkanwc.c200
1 files changed, 200 insertions, 0 deletions
diff --git a/src/mame/video/tehkanwc.c b/src/mame/video/tehkanwc.c
new file mode 100644
index 00000000000..5eb98d4de14
--- /dev/null
+++ b/src/mame/video/tehkanwc.c
@@ -0,0 +1,200 @@
+/***************************************************************************
+
+Tehkan World Cup - (c) Tehkan 1985
+
+
+Ernesto Corvi
+ernesto@imagina.com
+
+Roberto Juan Fresca
+robbiex@rocketmail.com
+
+***************************************************************************/
+
+#include "driver.h"
+
+UINT8 *tehkanwc_videoram2;
+static UINT8 scroll_x[2];
+static UINT8 led0,led1;
+
+static tilemap *bg_tilemap, *fg_tilemap;
+
+WRITE8_HANDLER( tehkanwc_videoram_w )
+{
+ videoram[offset] = data;
+ tilemap_mark_tile_dirty(fg_tilemap, offset);
+}
+
+WRITE8_HANDLER( tehkanwc_colorram_w )
+{
+ colorram[offset] = data;
+ tilemap_mark_tile_dirty(fg_tilemap, offset);
+}
+
+WRITE8_HANDLER( tehkanwc_videoram2_w )
+{
+ tehkanwc_videoram2[offset] = data;
+ tilemap_mark_tile_dirty(bg_tilemap, offset / 2);
+}
+
+WRITE8_HANDLER( tehkanwc_scroll_x_w )
+{
+ scroll_x[offset] = data;
+}
+
+WRITE8_HANDLER( tehkanwc_scroll_y_w )
+{
+ tilemap_set_scrolly(bg_tilemap, 0, data);
+}
+
+WRITE8_HANDLER( tehkanwc_flipscreen_x_w )
+{
+ flip_screen_x_set(data & 0x40);
+}
+
+WRITE8_HANDLER( tehkanwc_flipscreen_y_w )
+{
+ flip_screen_y_set(data & 0x40);
+}
+
+WRITE8_HANDLER( gridiron_led0_w )
+{
+ led0 = data;
+}
+WRITE8_HANDLER( gridiron_led1_w )
+{
+ led1 = data;
+}
+
+static TILE_GET_INFO( get_bg_tile_info )
+{
+ int offs = tile_index * 2;
+ int attr = tehkanwc_videoram2[offs + 1];
+ int code = tehkanwc_videoram2[offs] + ((attr & 0x30) << 4);
+ int color = attr & 0x0f;
+ int flags = ((attr & 0x40) ? TILE_FLIPX : 0) | ((attr & 0x80) ? TILE_FLIPY : 0);
+
+ SET_TILE_INFO(2, code, color, flags);
+}
+
+static TILE_GET_INFO( get_fg_tile_info )
+{
+ int attr = colorram[tile_index];
+ int code = videoram[tile_index] + ((attr & 0x10) << 4);
+ int color = attr & 0x0f;
+ int flags = ((attr & 0x40) ? TILE_FLIPX : 0) | ((attr & 0x80) ? TILE_FLIPY : 0);
+
+ tileinfo->category = (attr & 0x20) ? 0 : 1;
+
+ SET_TILE_INFO(0, code, color, flags);
+}
+
+VIDEO_START( tehkanwc )
+{
+ bg_tilemap = tilemap_create(get_bg_tile_info, tilemap_scan_rows,
+ TILEMAP_TYPE_PEN, 16, 8, 32, 32);
+
+ fg_tilemap = tilemap_create(get_fg_tile_info, tilemap_scan_rows,
+ TILEMAP_TYPE_PEN, 8, 8, 32, 32);
+
+ tilemap_set_transparent_pen(fg_tilemap, 0);
+}
+
+/*
+ Gridiron Fight has a LED display on the control panel, to let each player
+ choose the formation without letting the other know.
+ We emulate it by showing a character on the corner of the screen; the
+ association between the bits of the port and the led segments is:
+
+ ---0---
+ | |
+ 5 1
+ | |
+ ---6---
+ | |
+ 4 2
+ | |
+ ---3---
+
+ bit 7 = enable (0 = display off)
+ */
+
+static void gridiron_draw_led(running_machine *machine, mame_bitmap *bitmap, const rectangle *cliprect, UINT8 led,int player)
+{
+ int i;
+
+
+ static UINT8 ledvalues[] =
+ { 0x86, 0xdb, 0xcf, 0xe6, 0xed, 0xfd, 0x87, 0xff, 0xf3, 0xf1 };
+
+
+ if ((led & 0x80) == 0) return;
+
+ for (i = 0;i < 10;i++)
+ {
+ if (led == ledvalues[i] ) break;
+ }
+
+ if (i < 10)
+ {
+ if (player == 0)
+ drawgfx(bitmap,machine->gfx[0],
+ 0xc0 + i,
+ 0x0a,
+ 0,0,
+ 0,232,
+ cliprect,TRANSPARENCY_NONE,0);
+ else
+ drawgfx(bitmap,machine->gfx[0],
+ 0xc0 + i,
+ 0x03,
+ 1,1,
+ 0,16,
+ cliprect,TRANSPARENCY_NONE,0);
+ }
+else logerror("unknown LED %02x for player %d\n",led,player);
+}
+
+static void draw_sprites(running_machine *machine, mame_bitmap *bitmap, const rectangle *cliprect)
+{
+ int offs;
+
+ for (offs = 0;offs < spriteram_size;offs += 4)
+ {
+ int attr = spriteram[offs + 1];
+ int code = spriteram[offs] + ((attr & 0x08) << 5);
+ int color = attr & 0x07;
+ int flipx = attr & 0x40;
+ int flipy = attr & 0x80;
+ int sx = spriteram[offs + 2] + ((attr & 0x20) << 3) - 128;
+ int sy = spriteram[offs + 3];
+
+ if (flip_screen_x)
+ {
+ sx = 240 - sx;
+ flipx = !flipx;
+ }
+
+ if (flip_screen_y)
+ {
+ sy = 240 - sy;
+ flipy = !flipy;
+ }
+
+ drawgfx(bitmap, machine->gfx[1],
+ code, color, flipx, flipy, sx, sy,
+ cliprect, TRANSPARENCY_PEN, 0);
+ }
+}
+
+VIDEO_UPDATE( tehkanwc )
+{
+ tilemap_set_scrollx(bg_tilemap, 0, scroll_x[0] + 256 * scroll_x[1]);
+ tilemap_draw(bitmap, cliprect, bg_tilemap, 0, 0);
+ tilemap_draw(bitmap, cliprect, fg_tilemap, 0, 0);
+ draw_sprites(machine, bitmap, cliprect);
+ tilemap_draw(bitmap, cliprect, fg_tilemap, 1, 0);
+ gridiron_draw_led(machine, bitmap, cliprect, led0, 0);
+ gridiron_draw_led(machine, bitmap, cliprect, led1, 1);
+ return 0;
+}