/*************************************************************************** Atari Vindicators hardware ****************************************************************************/ #include "emu.h" #include "video/atarimo.h" #include "includes/vindictr.h" /************************************* * * Tilemap callbacks * *************************************/ static TILE_GET_INFO( get_alpha_tile_info ) { vindictr_state *state = machine.driver_data(); UINT16 data = state->m_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 ) { vindictr_state *state = machine.driver_data(); UINT16 data = state->m_playfield[tile_index]; int code = (state->m_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 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 */ }; vindictr_state *state = machine.driver_data(); /* initialize the playfield */ state->m_playfield_tilemap = tilemap_create(machine, get_playfield_tile_info, tilemap_scan_cols, 8,8, 64,64); /* initialize the motion objects */ atarimo_init(machine, 0, &modesc); /* initialize the alphanumerics */ state->m_alpha_tilemap = tilemap_create(machine, get_alpha_tile_info, tilemap_scan_rows, 8,8, 64,32); tilemap_set_transparent_pen(state->m_alpha_tilemap, 0); /* save states */ state->save_item(NAME(state->m_playfield_tile_bank)); state->save_item(NAME(state->m_playfield_xscroll)); state->save_item(NAME(state->m_playfield_yscroll)); } /************************************* * * 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(&space->machine().generic.paletteram.u16[offset]); data = space->machine().generic.paletteram.u16[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(space->machine(),offset + c*2048,MAKE_RGB(r,g,b)); } } /************************************* * * Periodic scanline updater * *************************************/ void vindictr_scanline_update(screen_device &screen, int scanline) { vindictr_state *state = screen.machine().driver_data(); UINT16 *base = &state->m_alpha[((scanline - 8) / 8) * 64 + 42]; int x; /* keep in range */ if (base < state->m_alpha) base += 0x7c0; else if (base >= &state->m_alpha[0x7c0]) return; /* update the current parameters */ for (x = 42; x < 64; x++) { UINT16 data = *base++; switch ((data >> 9) & 7) { case 2: /* /PFB */ if (state->m_playfield_tile_bank != (data & 7)) { screen.update_partial(scanline - 1); state->m_playfield_tile_bank = data & 7; tilemap_mark_all_tiles_dirty(state->m_playfield_tilemap); } break; case 3: /* /PFHSLD */ if (state->m_playfield_xscroll != (data & 0x1ff)) { screen.update_partial(scanline - 1); tilemap_set_scrollx(state->m_playfield_tilemap, 0, data); state->m_playfield_xscroll = data & 0x1ff; } break; case 4: /* /MOHS */ if (atarimo_get_xscroll(0) != (data & 0x1ff)) { screen.update_partial(scanline - 1); atarimo_set_xscroll(0, data & 0x1ff); } break; case 5: /* /PFSPC */ break; case 6: /* /VIRQ */ atarigen_scanline_int_gen(screen.machine().device("maincpu")); break; case 7: /* /PFVS */ { /* a new vscroll latches the offset into a counter; we must adjust for this */ int offset = scanline; const rectangle &visible_area = screen.visible_area(); if (offset > visible_area.max_y) offset -= visible_area.max_y + 1; if (state->m_playfield_yscroll != ((data - offset) & 0x1ff)) { screen.update_partial(scanline - 1); tilemap_set_scrolly(state->m_playfield_tilemap, 0, data - offset); atarimo_set_yscroll(0, (data - offset) & 0x1ff); } break; } } } } /************************************* * * Main refresh * *************************************/ SCREEN_UPDATE( vindictr ) { vindictr_state *state = screen->machine().driver_data(); atarimo_rect_list rectlist; bitmap_t *mobitmap; int x, y, r; /* draw the playfield */ tilemap_draw(bitmap, cliprect, state->m_playfield_tilemap, 0, 0); /* draw and merge the MO */ mobitmap = atarimo_render(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, state->m_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) atarimo_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; }