/*************************************************************************** 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; }