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-rw-r--r--src/mame/video/exzisus.c229
1 files changed, 229 insertions, 0 deletions
diff --git a/src/mame/video/exzisus.c b/src/mame/video/exzisus.c
new file mode 100644
index 00000000000..d40f96ac6e3
--- /dev/null
+++ b/src/mame/video/exzisus.c
@@ -0,0 +1,229 @@
+/***************************************************************************
+
+Functions to emulate the video hardware of the machine.
+
+ Video hardware of this hardware is almost similar with "mexico86". So,
+ most routines are derived from mexico86 driver.
+
+***************************************************************************/
+
+
+#include "driver.h"
+
+
+UINT8 *exzisus_videoram0;
+UINT8 *exzisus_videoram1;
+UINT8 *exzisus_objectram0;
+UINT8 *exzisus_objectram1;
+size_t exzisus_objectram_size0;
+size_t exzisus_objectram_size1;
+
+
+
+/***************************************************************************
+ Memory handlers
+***************************************************************************/
+
+READ8_HANDLER ( exzisus_videoram_0_r )
+{
+ return exzisus_videoram0[offset];
+}
+
+
+READ8_HANDLER ( exzisus_videoram_1_r )
+{
+ return exzisus_videoram1[offset];
+}
+
+
+READ8_HANDLER ( exzisus_objectram_0_r )
+{
+ return exzisus_objectram0[offset];
+}
+
+
+READ8_HANDLER ( exzisus_objectram_1_r )
+{
+ return exzisus_objectram1[offset];
+}
+
+
+WRITE8_HANDLER( exzisus_videoram_0_w )
+{
+ exzisus_videoram0[offset] = data;
+}
+
+
+WRITE8_HANDLER( exzisus_videoram_1_w )
+{
+ exzisus_videoram1[offset] = data;
+}
+
+
+WRITE8_HANDLER( exzisus_objectram_0_w )
+{
+ exzisus_objectram0[offset] = data;
+}
+
+
+WRITE8_HANDLER( exzisus_objectram_1_w )
+{
+ exzisus_objectram1[offset] = data;
+}
+
+
+/***************************************************************************
+ Screen refresh
+***************************************************************************/
+
+VIDEO_UPDATE( exzisus )
+{
+ int offs;
+ int sx, sy, xc, yc;
+ int gfx_num, gfx_attr, gfx_offs;
+
+ /* Is this correct ? */
+ fillbitmap(bitmap, machine->pens[1023], cliprect);
+
+ /* ---------- 1st TC0010VCU ---------- */
+ sx = 0;
+ for (offs = 0 ; offs < exzisus_objectram_size0 ; offs += 4)
+ {
+ int height;
+
+ /* Skip empty sprites. */
+ if ( !(*(UINT32 *)(&exzisus_objectram0[offs])) )
+ {
+ continue;
+ }
+
+ gfx_num = exzisus_objectram0[offs + 1];
+ gfx_attr = exzisus_objectram0[offs + 3];
+
+ if ((gfx_num & 0x80) == 0) /* 16x16 sprites */
+ {
+ gfx_offs = ((gfx_num & 0x7f) << 3);
+ height = 2;
+
+ sx = exzisus_objectram0[offs + 2];
+ sx |= (gfx_attr & 0x40) << 2;
+ }
+ else /* tilemaps (each sprite is a 16x256 column) */
+ {
+ gfx_offs = ((gfx_num & 0x3f) << 7) + 0x0400;
+ height = 32;
+
+ if (gfx_num & 0x40) /* Next column */
+ {
+ sx += 16;
+ }
+ else
+ {
+ sx = exzisus_objectram0[offs + 2];
+ sx |= (gfx_attr & 0x40) << 2;
+ }
+ }
+
+ sy = 256 - (height << 3) - (exzisus_objectram0[offs]);
+
+ for (xc = 0 ; xc < 2 ; xc++)
+ {
+ int goffs = gfx_offs;
+ for (yc = 0 ; yc < height ; yc++)
+ {
+ int code, color, x, y;
+
+ code = (exzisus_videoram0[goffs + 1] << 8) | exzisus_videoram0[goffs];
+ color = (exzisus_videoram0[goffs + 1] >> 6) | (gfx_attr & 0x0f);
+ x = (sx + (xc << 3)) & 0xff;
+ y = (sy + (yc << 3)) & 0xff;
+
+ if (flip_screen)
+ {
+ x = 248 - x;
+ y = 248 - y;
+ }
+
+ drawgfx(bitmap, machine->gfx[0],
+ code & 0x3fff,
+ color,
+ flip_screen, flip_screen,
+ x, y,
+ cliprect, TRANSPARENCY_PEN, 15);
+ goffs += 2;
+ }
+ gfx_offs += height << 1;
+ }
+ }
+
+ /* ---------- 2nd TC0010VCU ---------- */
+ sx = 0;
+ for (offs = 0 ; offs < exzisus_objectram_size1 ; offs += 4)
+ {
+ int height;
+
+ /* Skip empty sprites. */
+ if ( !(*(UINT32 *)(&exzisus_objectram1[offs])) )
+ {
+ continue;
+ }
+
+ gfx_num = exzisus_objectram1[offs + 1];
+ gfx_attr = exzisus_objectram1[offs + 3];
+
+ if ((gfx_num & 0x80) == 0) /* 16x16 sprites */
+ {
+ gfx_offs = ((gfx_num & 0x7f) << 3);
+ height = 2;
+
+ sx = exzisus_objectram1[offs + 2];
+ sx |= (gfx_attr & 0x40) << 2;
+ }
+ else /* tilemaps (each sprite is a 16x256 column) */
+ {
+ gfx_offs = ((gfx_num & 0x3f) << 7) + 0x0400; ///
+ height = 32;
+
+ if (gfx_num & 0x40) /* Next column */
+ {
+ sx += 16;
+ }
+ else
+ {
+ sx = exzisus_objectram1[offs + 2];
+ sx |= (gfx_attr & 0x40) << 2;
+ }
+ }
+ sy = 256 - (height << 3) - (exzisus_objectram1[offs]);
+
+ for (xc = 0 ; xc < 2 ; xc++)
+ {
+ int goffs = gfx_offs;
+ for (yc = 0 ; yc < height ; yc++)
+ {
+ int code, color, x, y;
+
+ code = (exzisus_videoram1[goffs + 1] << 8) | exzisus_videoram1[goffs];
+ color = (exzisus_videoram1[goffs + 1] >> 6) | (gfx_attr & 0x0f);
+ x = (sx + (xc << 3)) & 0xff;
+ y = (sy + (yc << 3)) & 0xff;
+
+ if (flip_screen)
+ {
+ x = 248 - x;
+ y = 248 - y;
+ }
+
+ drawgfx(bitmap, machine->gfx[1],
+ code & 0x3fff,
+ color,
+ flip_screen, flip_screen,
+ x, y,
+ cliprect, TRANSPARENCY_PEN, 15);
+ goffs += 2;
+ }
+ gfx_offs += height << 1;
+ }
+ }
+ return 0;
+}