summaryrefslogtreecommitdiffstatshomepage
path: root/src/mame/video/sauro.c
diff options
context:
space:
mode:
Diffstat (limited to 'src/mame/video/sauro.c')
-rw-r--r--src/mame/video/sauro.c217
1 files changed, 217 insertions, 0 deletions
diff --git a/src/mame/video/sauro.c b/src/mame/video/sauro.c
new file mode 100644
index 00000000000..14715804ab9
--- /dev/null
+++ b/src/mame/video/sauro.c
@@ -0,0 +1,217 @@
+/***************************************************************************
+
+ video.c
+
+ Functions to emulate the video hardware of the machine.
+
+***************************************************************************/
+
+#include "driver.h"
+
+UINT8 *tecfri_videoram;
+UINT8 *tecfri_colorram;
+UINT8 *tecfri_videoram2;
+UINT8 *tecfri_colorram2;
+
+static tilemap *bg_tilemap, *fg_tilemap;
+
+/* General */
+
+WRITE8_HANDLER( tecfri_videoram_w )
+{
+ tecfri_videoram[offset] = data;
+ tilemap_mark_tile_dirty(bg_tilemap, offset);
+}
+
+WRITE8_HANDLER( tecfri_colorram_w )
+{
+ tecfri_colorram[offset] = data;
+ tilemap_mark_tile_dirty(bg_tilemap, offset);
+}
+
+WRITE8_HANDLER( tecfri_videoram2_w )
+{
+ tecfri_videoram2[offset] = data;
+ tilemap_mark_tile_dirty(fg_tilemap, offset);
+}
+
+WRITE8_HANDLER( tecfri_colorram2_w )
+{
+ tecfri_colorram2[offset] = data;
+ tilemap_mark_tile_dirty(fg_tilemap, offset);
+}
+
+WRITE8_HANDLER( tecfri_scroll_bg_w )
+{
+ tilemap_set_scrollx(bg_tilemap, 0, data);
+}
+
+static TILE_GET_INFO( get_tile_info_bg )
+{
+ int code = tecfri_videoram[tile_index] + ((tecfri_colorram[tile_index] & 0x07) << 8);
+ int color = (tecfri_colorram[tile_index] >> 4) & 0x0f;
+ int flags = tecfri_colorram[tile_index] & 0x08 ? TILE_FLIPX : 0;
+
+ SET_TILE_INFO(0, code, color, flags);
+}
+
+static TILE_GET_INFO( get_tile_info_fg )
+{
+ int code = tecfri_videoram2[tile_index] + ((tecfri_colorram2[tile_index] & 0x07) << 8);
+ int color = (tecfri_colorram2[tile_index] >> 4) & 0x0f;
+ int flags = tecfri_colorram2[tile_index] & 0x08 ? TILE_FLIPX : 0;
+
+ SET_TILE_INFO(1, code, color, flags);
+}
+
+/* Sauro */
+
+static int scroll2_map [8] = {2, 1, 4, 3, 6, 5, 0, 7};
+static int scroll2_map_flip[8] = {0, 7, 2, 1, 4, 3, 6, 5};
+
+WRITE8_HANDLER( sauro_scroll_fg_w )
+{
+ int *map = (flip_screen ? scroll2_map_flip : scroll2_map);
+ int scroll = (data & 0xf8) | map[data & 7];
+
+ tilemap_set_scrollx(fg_tilemap, 0, scroll);
+}
+
+VIDEO_START( sauro )
+{
+ bg_tilemap = tilemap_create(get_tile_info_bg, tilemap_scan_cols,
+ TILEMAP_TYPE_PEN, 8, 8, 32, 32);
+
+ fg_tilemap = tilemap_create(get_tile_info_fg, tilemap_scan_cols,
+ TILEMAP_TYPE_PEN, 8, 8, 32, 32);
+
+ tilemap_set_transparent_pen(fg_tilemap, 0);
+}
+
+static void sauro_draw_sprites(running_machine *machine, mame_bitmap *bitmap, const rectangle *cliprect)
+{
+ int offs,code,sx,sy,color,flipx;
+
+ for (offs = 3;offs < spriteram_size - 1;offs += 4)
+ {
+ sy = spriteram[offs];
+ if (sy == 0xf8) continue;
+
+ code = spriteram[offs+1] + ((spriteram[offs+3] & 0x03) << 8);
+ sx = spriteram[offs+2];
+ sy = 236 - sy;
+ color = (spriteram[offs+3] >> 4) & 0x0f;
+
+ // I'm not really sure how this bit works
+ if (spriteram[offs+3] & 0x08)
+ {
+ if (sx > 0xc0)
+ {
+ // Sign extend
+ sx = (signed int)(signed char)sx;
+ }
+ }
+ else
+ {
+ if (sx < 0x40) continue;
+ }
+
+ flipx = spriteram[offs+3] & 0x04;
+
+ if (flip_screen)
+ {
+ flipx = !flipx;
+ sx = (235 - sx) & 0xff; // The &0xff is not 100% percent correct
+ sy = 240 - sy;
+ }
+
+ drawgfx(bitmap, machine->gfx[2],
+ code,
+ color,
+ flipx,flip_screen,
+ sx,sy,
+ cliprect,TRANSPARENCY_PEN,0);
+ }
+}
+
+VIDEO_UPDATE( sauro )
+{
+ tilemap_draw(bitmap, cliprect, bg_tilemap, 0, 0);
+ tilemap_draw(bitmap, cliprect, fg_tilemap, 0, 0);
+ sauro_draw_sprites(machine, bitmap, cliprect);
+ return 0;
+}
+
+/* Tricky Doc */
+
+WRITE8_HANDLER ( trckydoc_spriteram_mirror_w )
+{
+ spriteram[offset] = data;
+}
+
+VIDEO_START( trckydoc )
+{
+ bg_tilemap = tilemap_create(get_tile_info_bg, tilemap_scan_cols,
+ TILEMAP_TYPE_PEN, 8, 8, 32, 32);
+}
+
+static void trckydoc_draw_sprites(running_machine *machine, mame_bitmap *bitmap, const rectangle *cliprect)
+{
+ int offs,code,sy,color,flipx,sx;
+
+ /* Weird, sprites entries don't start on DWORD boundary */
+ for (offs = 3;offs < spriteram_size - 1;offs += 4)
+ {
+ sy = spriteram[offs];
+
+ if(spriteram[offs+3] & 0x08)
+ {
+ /* needed by the elevator cable (2nd stage), balls bouncing (3rd stage) and maybe other things */
+ sy += 6;
+ }
+
+ code = spriteram[offs+1] + ((spriteram[offs+3] & 0x01) << 8);
+
+ sx = spriteram[offs+2]-2;
+ color = (spriteram[offs+3] >> 4) & 0x0f;
+
+ sy = 236 - sy;
+
+ /* similar to sauro but different bit is used .. */
+ if (spriteram[offs+3] & 0x02)
+ {
+ if (sx > 0xc0)
+ {
+ /* Sign extend */
+ sx = (signed int)(signed char)sx;
+ }
+ }
+ else
+ {
+ if (sx < 0x40) continue;
+ }
+
+ flipx = spriteram[offs+3] & 0x04;
+
+ if (flip_screen)
+ {
+ flipx = !flipx;
+ sx = (235 - sx) & 0xff; /* The &0xff is not 100% percent correct */
+ sy = 240 - sy;
+ }
+
+ drawgfx(bitmap, machine->gfx[1],
+ code,
+ color,
+ flipx,flip_screen,
+ sx,sy,
+ cliprect,TRANSPARENCY_PEN,0);
+ }
+}
+
+VIDEO_UPDATE( trckydoc )
+{
+ tilemap_draw(bitmap, cliprect, bg_tilemap, 0, 0);
+ trckydoc_draw_sprites(machine, bitmap, cliprect);
+ return 0;
+}