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-rw-r--r--src/mame/video/vindictr.c303
1 files changed, 303 insertions, 0 deletions
diff --git a/src/mame/video/vindictr.c b/src/mame/video/vindictr.c
new file mode 100644
index 00000000000..1c69805b485
--- /dev/null
+++ b/src/mame/video/vindictr.c
@@ -0,0 +1,303 @@
+/***************************************************************************
+
+ Atari Vindicators hardware
+
+****************************************************************************/
+
+#include "driver.h"
+#include "machine/atarigen.h"
+#include "vindictr.h"
+#include "thunderj.h"
+
+
+
+/*************************************
+ *
+ * Statics
+ *
+ *************************************/
+
+static UINT8 playfield_tile_bank;
+static UINT16 playfield_xscroll;
+static UINT16 playfield_yscroll;
+
+
+
+/*************************************
+ *
+ * Tilemap callbacks
+ *
+ *************************************/
+
+static TILE_GET_INFO( get_alpha_tile_info )
+{
+ UINT16 data = atarigen_alpha[tile_index];
+ int code = data & 0x3ff;
+ int color = ((data >> 10) & 0x0f) | ((data >> 9) & 0x20);
+ int opaque = data & 0x8000;
+ SET_TILE_INFO(1, code, color, opaque ? TILE_FORCE_LAYER0 : 0);
+}
+
+
+static TILE_GET_INFO( get_playfield_tile_info )
+{
+ UINT16 data = atarigen_playfield[tile_index];
+ int code = (playfield_tile_bank * 0x1000) + (data & 0xfff);
+ int color = 0x10 + 2 * ((data >> 12) & 7);
+ SET_TILE_INFO(0, code, color, (data >> 15) & 1);
+}
+
+
+
+/*************************************
+ *
+ * Video system start
+ *
+ *************************************/
+
+VIDEO_START( vindictr )
+{
+ static const struct atarimo_desc modesc =
+ {
+ 0, /* 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) */
+
+ 0x100, /* base palette entry */
+ 0x100, /* maximum number of colors */
+ 0, /* transparent pen index */
+
+ {{ 0,0,0,0x03ff }}, /* mask for the link */
+ {{ 0 }}, /* mask for the graphics bank */
+ {{ 0x7fff,0,0,0 }}, /* mask for the code index */
+ {{ 0 }}, /* mask for the upper code index */
+ {{ 0,0x000f,0,0 }}, /* mask for the color */
+ {{ 0,0xff80,0,0 }}, /* mask for the X position */
+ {{ 0,0,0xff80,0 }}, /* mask for the Y position */
+ {{ 0,0,0x0038,0 }}, /* mask for the width, in tiles*/
+ {{ 0,0,0x0007,0 }}, /* mask for the height, in tiles */
+ {{ 0,0,0x0040,0 }}, /* mask for the horizontal flip */
+ {{ 0 }}, /* mask for the vertical flip */
+ {{ 0,0x0070,0,0 }}, /* 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" */
+ NULL /* 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);
+
+ /* initialize the alphanumerics */
+ atarigen_alpha_tilemap = tilemap_create(get_alpha_tile_info, tilemap_scan_rows, TILEMAP_TYPE_PEN, 8,8, 64,32);
+ tilemap_set_transparent_pen(atarigen_alpha_tilemap, 0);
+}
+
+
+
+/*************************************
+ *
+ * Palette RAM control
+ *
+ *************************************/
+
+WRITE16_HANDLER( vindictr_paletteram_w )
+{
+ static const int ztable[16] =
+ { 0x0, 0x3, 0x4, 0x5, 0x6, 0x7, 0x8, 0x9, 0xa, 0xb, 0xc, 0xd, 0xe, 0xf, 0x10, 0x11 };
+ int c;
+
+ /* first blend the data */
+ COMBINE_DATA(&paletteram16[offset]);
+ data = paletteram16[offset];
+
+ /* now generate colors at all 16 intensities */
+ for (c = 0; c < 8; c++)
+ {
+ int i = ztable[((data >> 12) + (c * 2)) & 15];
+ int r = ((data >> 8) & 15) * i;
+ int g = ((data >> 4) & 15) * i;
+ int b = ((data >> 0) & 15) * i;
+
+ palette_set_color(Machine,offset + c*2048,MAKE_RGB(r,g,b));
+ }
+}
+
+
+
+/*************************************
+ *
+ * Periodic scanline updater
+ *
+ *************************************/
+
+void vindictr_scanline_update(running_machine *machine, int scrnum, int scanline)
+{
+ UINT16 *base = &atarigen_alpha[((scanline - 8) / 8) * 64 + 42];
+ int x;
+
+ /* keep in range */
+ if (base < atarigen_alpha)
+ base += 0x7c0;
+ else if (base >= &atarigen_alpha[0x7c0])
+ return;
+
+ /* update the current parameters */
+ for (x = 42; x < 64; x++)
+ {
+ UINT16 data = *base++;
+
+ switch ((data >> 9) & 7)
+ {
+ case 2: /* /PFB */
+ if (playfield_tile_bank != (data & 7))
+ {
+ video_screen_update_partial(0, scanline - 1);
+ playfield_tile_bank = data & 7;
+ tilemap_mark_all_tiles_dirty(atarigen_playfield_tilemap);
+ }
+ break;
+
+ case 3: /* /PFHSLD */
+ if (playfield_xscroll != (data & 0x1ff))
+ {
+ video_screen_update_partial(0, scanline - 1);
+ tilemap_set_scrollx(atarigen_playfield_tilemap, 0, data);
+ playfield_xscroll = data & 0x1ff;
+ }
+ break;
+
+ case 4: /* /MOHS */
+ if (atarimo_get_xscroll(0) != (data & 0x1ff))
+ {
+ video_screen_update_partial(0, scanline - 1);
+ atarimo_set_xscroll(0, data & 0x1ff);
+ }
+ break;
+
+ case 5: /* /PFSPC */
+ break;
+
+ case 6: /* /VIRQ */
+ atarigen_scanline_int_gen();
+ break;
+
+ case 7: /* /PFVS */
+ {
+ /* a new vscroll latches the offset into a counter; we must adjust for this */
+ int offset = scanline;
+ if (offset > machine->screen[0].visarea.max_y)
+ offset -= machine->screen[0].visarea.max_y + 1;
+
+ if (playfield_yscroll != ((data - offset) & 0x1ff))
+ {
+ video_screen_update_partial(0, scanline - 1);
+ tilemap_set_scrolly(atarigen_playfield_tilemap, 0, data - offset);
+ atarimo_set_yscroll(0, (data - offset) & 0x1ff);
+ }
+ break;
+ }
+ }
+ }
+}
+
+
+
+/*************************************
+ *
+ * Main refresh
+ *
+ *************************************/
+
+VIDEO_UPDATE( vindictr )
+{
+ 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])
+ {
+ /* partially verified via schematics (there are a lot of PALs involved!):
+
+ SHADE = PAL(MPR1-0, LB7-0, PFX6-5, PFX3-2, PF/M)
+
+ if (SHADE)
+ CRA |= 0x100
+
+ MOG3-1 = ~MAT3-1 if MAT6==1 and MSD3==1
+ */
+ int mopriority = mo[x] >> ATARIMO_PRIORITY_SHIFT;
+
+ /* upper bit of MO priority signals special rendering and doesn't draw anything */
+ if (mopriority & 4)
+ continue;
+
+ /* MO pen 1 doesn't draw, but it sets the SHADE flag and bumps the palette offset */
+ if ((mo[x] & 0x0f) == 1)
+ {
+ if ((mo[x] & 0xf0) != 0)
+ pf[x] |= 0x100;
+ }
+ else
+ pf[x] = mo[x] & ATARIMO_DATA_MASK;
+
+ /* don't erase yet -- we need to make another pass later */
+ }
+ }
+
+ /* add the alpha on top */
+ tilemap_draw(bitmap, cliprect, atarigen_alpha_tilemap, 0, 0);
+
+ /* now go back and process the upper bit of MO priority */
+ rectlist.rect -= rectlist.numrects;
+ 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])
+ {
+ int mopriority = mo[x] >> ATARIMO_PRIORITY_SHIFT;
+
+ /* upper bit of MO priority might mean palette kludges */
+ if (mopriority & 4)
+ {
+ /* if bit 2 is set, start setting high palette bits */
+ if (mo[x] & 2)
+ thunderj_mark_high_palette(bitmap, pf, mo, x, y);
+
+ /* if the upper bit of pen data is set, we adjust the final intensity */
+ if (mo[x] & 8)
+ pf[x] |= (~mo[x] & 0xe0) << 6;
+ }
+
+ /* erase behind ourselves */
+ mo[x] = 0;
+ }
+ }
+ return 0;
+}