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-rw-r--r--src/mame/video/shuuz.c140
1 files changed, 140 insertions, 0 deletions
diff --git a/src/mame/video/shuuz.c b/src/mame/video/shuuz.c
new file mode 100644
index 00000000000..252a0af283d
--- /dev/null
+++ b/src/mame/video/shuuz.c
@@ -0,0 +1,140 @@
+/***************************************************************************
+
+ Atari Shuuz hardware
+
+****************************************************************************/
+
+#include "driver.h"
+#include "machine/atarigen.h"
+#include "shuuz.h"
+
+
+
+/*************************************
+ *
+ * Tilemap callbacks
+ *
+ *************************************/
+
+static TILE_GET_INFO( get_playfield_tile_info )
+{
+ UINT16 data1 = atarigen_playfield[tile_index];
+ UINT16 data2 = atarigen_playfield_upper[tile_index] >> 8;
+ int code = data1 & 0x3fff;
+ int color = data2 & 0x0f;
+ SET_TILE_INFO(0, code, color, (data1 >> 15) & 1);
+}
+
+
+
+/*************************************
+ *
+ * Video system start
+ *
+ *************************************/
+
+VIDEO_START( shuuz )
+{
+ static const struct atarimo_desc modesc =
+ {
+ 1, /* index to which gfx system */
+ 1, /* number of motion object banks */
+ 1, /* are the entries linked? */
+ 0, /* are the entries split? */
+ 0, /* render in reverse order? */
+ 0, /* render in swapped X/Y order? */
+ 0, /* does the neighbor bit affect the next object? */
+ 8, /* pixels per SLIP entry (0 for no-slip) */
+ 0, /* pixel offset for SLIPs */
+ 0, /* maximum number of links to visit/scanline (0=all) */
+
+ 0x000, /* base palette entry */
+ 0x100, /* maximum number of colors */
+ 0, /* transparent pen index */
+
+ {{ 0x00ff,0,0,0 }}, /* mask for the link */
+ {{ 0 }}, /* mask for the graphics bank */
+ {{ 0,0x7fff,0,0 }}, /* mask for the code index */
+ {{ 0 }}, /* mask for the upper code index */
+ {{ 0,0,0x000f,0 }}, /* mask for the color */
+ {{ 0,0,0xff80,0 }}, /* mask for the X position */
+ {{ 0,0,0,0xff80 }}, /* mask for the Y position */
+ {{ 0,0,0,0x0070 }}, /* mask for the width, in tiles*/
+ {{ 0,0,0,0x0007 }}, /* mask for the height, in tiles */
+ {{ 0,0x8000,0,0 }}, /* mask for the horizontal flip */
+ {{ 0 }}, /* mask for the vertical flip */
+ {{ 0 }}, /* mask for the priority */
+ {{ 0 }}, /* mask for the neighbor */
+ {{ 0 }}, /* mask for absolute coordinates */
+
+ {{ 0 }}, /* mask for the special value */
+ 0, /* resulting value to indicate "special" */
+ 0 /* callback routine for special entries */
+ };
+
+ /* initialize the playfield */
+ atarigen_playfield_tilemap = tilemap_create(get_playfield_tile_info, tilemap_scan_cols, TILEMAP_TYPE_PEN, 8,8, 64,64);
+
+ /* initialize the motion objects */
+ atarimo_init(machine, 0, &modesc);
+}
+
+
+
+/*************************************
+ *
+ * Main refresh
+ *
+ *************************************/
+
+VIDEO_UPDATE( shuuz )
+{
+ struct atarimo_rect_list rectlist;
+ mame_bitmap *mobitmap;
+ int x, y, r;
+
+ /* draw the playfield */
+ tilemap_draw(bitmap, cliprect, atarigen_playfield_tilemap, 0, 0);
+
+ /* draw and merge the MO */
+ mobitmap = atarimo_render(machine, 0, cliprect, &rectlist);
+ for (r = 0; r < rectlist.numrects; r++, rectlist.rect++)
+ for (y = rectlist.rect->min_y; y <= rectlist.rect->max_y; y++)
+ {
+ UINT16 *mo = (UINT16 *)mobitmap->base + mobitmap->rowpixels * y;
+ UINT16 *pf = (UINT16 *)bitmap->base + bitmap->rowpixels * y;
+ for (x = rectlist.rect->min_x; x <= rectlist.rect->max_x; x++)
+ if (mo[x])
+ {
+ /* verified from the GALs on the real PCB; equations follow
+ *
+ * --- O13 is 1 if (PFS7-4 == 0xf)
+ * O13=PFS6*PFS7*(PFS5&PFS4)
+ *
+ * --- PF/M is 1 if MOs have priority, or 0 if playfield has priority
+ * MO/PF=!PFS7*!(LBD7&LBD6)*!M1*!O13
+ * +!PFS7*!(LBD7&LBD6)*!M2*!O13
+ * +!PFS7*!(LBD7&LBD6)*!M3*!O13
+ * +PFS7*(LBD7&LBD6)*!M1*!O13
+ * +PFS7*(LBD7&LBD6)*!M2*!O13
+ * +PFS7*(LBD7&LBD6)*!M3*!O13
+ *
+ */
+ int o13 = ((pf[x] & 0xf0) == 0xf0);
+ int mopf = 0;
+
+ /* compute the MO/PF signal */
+ if ((!(pf[x] & 0x80) && ((mo[x] & 0xc0) != 0xc0) && ((mo[x] & 0x0e) != 0x00) && !o13) ||
+ ((pf[x] & 0x80) && ((mo[x] & 0xc0) == 0xc0) && ((mo[x] & 0x0e) != 0x00) && !o13))
+ mopf = 1;
+
+ /* if MO/PF is 1, we draw the MO */
+ if (mopf)
+ pf[x] = mo[x];
+
+ /* erase behind ourselves */
+ mo[x] = 0;
+ }
+ }
+ return 0;
+}