/*************************************************************************** Atari Cyberball hardware ****************************************************************************/ #include "driver.h" #include "machine/atarigen.h" #include "cyberbal.h" #define SCREEN_WIDTH (42*16) /************************************* * * Globals we own * *************************************/ UINT16 *cyberbal_paletteram_0; UINT16 *cyberbal_paletteram_1; /************************************* * * Statics * *************************************/ static UINT8 current_screen; static UINT8 total_screens; static UINT16 current_slip[2]; static UINT8 playfield_palette_bank[2]; static UINT16 playfield_xscroll[2]; static UINT16 playfield_yscroll[2]; /************************************* * * Tilemap callbacks * *************************************/ static TILE_GET_INFO( get_alpha_tile_info ) { UINT16 data = atarigen_alpha[tile_index]; int code = data & 0xfff; int color = (data >> 12) & 0x07; SET_TILE_INFO(2, code, color, (data >> 15) & 1); } static TILE_GET_INFO( get_alpha2_tile_info ) { UINT16 data = atarigen_alpha2[tile_index]; int code = data & 0xfff; int color = (data >> 12) & 0x07; SET_TILE_INFO(2, code, 0x80 | color, (data >> 15) & 1); } static TILE_GET_INFO( get_playfield_tile_info ) { UINT16 data = atarigen_playfield[tile_index]; int code = data & 0x1fff; int color = (data >> 11) & 0x0f; SET_TILE_INFO(0, code, color, (data >> 15) & 1); } static TILE_GET_INFO( get_playfield2_tile_info ) { UINT16 data = atarigen_playfield2[tile_index]; int code = data & 0x1fff; int color = (data >> 11) & 0x0f; SET_TILE_INFO(0, code, 0x80 | color, (data >> 15) & 1); } /************************************* * * Video system start * *************************************/ static void video_start_cyberbal_common(running_machine* machine, int screens) { static const struct atarimo_desc mo0desc = { 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? */ 1, /* does the neighbor bit affect the next object? */ 1024, /* pixels per SLIP entry (0 for no-slip) */ 0, /* pixel offset for SLIPs */ 0, /* maximum number of links to visit/scanline (0=all) */ 0x600, /* base palette entry */ 0x100, /* maximum number of colors */ 0, /* transparent pen index */ {{ 0,0,0x07f8,0 }}, /* 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 */ {{ 0,0,0,0x000f }}, /* mask for the color */ {{ 0,0,0,0xffc0 }}, /* mask for the X position */ {{ 0,0xff80,0,0 }}, /* mask for the Y position */ {{ 0 }}, /* mask for the width, in tiles*/ {{ 0,0x000f,0,0 }}, /* mask for the height, in tiles */ {{ 0x8000,0,0,0 }}, /* mask for the horizontal flip */ {{ 0 }}, /* mask for the vertical flip */ {{ 0 }}, /* mask for the priority */ {{ 0,0,0,0x0010 }}, /* 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 */ }; static const struct atarimo_desc mo1desc = { 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? */ 1, /* does the neighbor bit affect the next object? */ 1024, /* pixels per SLIP entry (0 for no-slip) */ 0, /* pixel offset for SLIPs */ 0, /* maximum number of links to visit/scanline (0=all) */ 0xe00, /* base palette entry */ 0x100, /* maximum number of colors */ 0, /* transparent pen index */ {{ 0,0,0x07f8,0 }}, /* 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 */ {{ 0,0,0,0x000f }}, /* mask for the color */ {{ 0,0,0,0xffc0 }}, /* mask for the X position */ {{ 0,0xff80,0,0 }}, /* mask for the Y position */ {{ 0 }}, /* mask for the width, in tiles*/ {{ 0,0x000f,0,0 }}, /* mask for the height, in tiles */ {{ 0x8000,0,0,0 }}, /* mask for the horizontal flip */ {{ 0 }}, /* mask for the vertical flip */ {{ 0 }}, /* mask for the priority */ {{ 0,0,0,0x0010 }}, /* 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 */ }; /* set the slip variables */ atarimo_0_slipram = ¤t_slip[0]; atarimo_1_slipram = ¤t_slip[1]; /* initialize the playfield */ atarigen_playfield_tilemap = tilemap_create(get_playfield_tile_info, tilemap_scan_rows, TILEMAP_TYPE_PEN, 16,8, 64,64); /* initialize the motion objects */ atarimo_init(machine, 0, &mo0desc); /* initialize the alphanumerics */ atarigen_alpha_tilemap = tilemap_create(get_alpha_tile_info, tilemap_scan_rows, TILEMAP_TYPE_PEN, 16,8, 64,32); tilemap_set_transparent_pen(atarigen_alpha_tilemap, 0); /* allocate the second screen if necessary */ if (screens == 2) { /* initialize the playfield */ atarigen_playfield2_tilemap = tilemap_create(get_playfield2_tile_info, tilemap_scan_rows, TILEMAP_TYPE_PEN, 16,8, 64,64); tilemap_set_scrollx(atarigen_playfield2_tilemap, 0, 0); /* initialize the motion objects */ atarimo_init(machine, 1, &mo1desc); /* initialize the alphanumerics */ atarigen_alpha2_tilemap = tilemap_create(get_alpha2_tile_info, tilemap_scan_rows, TILEMAP_TYPE_PEN, 16,8, 64,32); tilemap_set_scrollx(atarigen_alpha2_tilemap, 0, 0); tilemap_set_transparent_pen(atarigen_alpha2_tilemap, 0); } /* reset statics */ current_slip[0] = 0; current_slip[1] = 0; total_screens = screens; current_screen = 0; } VIDEO_START( cyberbal ) { video_start_cyberbal_common(machine, 2); /* adjust the sprite positions */ atarimo_set_xscroll(0, 4); atarimo_set_xscroll(1, 4); } VIDEO_START( cyberb2p ) { video_start_cyberbal_common(machine, 1); /* adjust the sprite positions */ atarimo_set_xscroll(0, 5); } /************************************* * * Screen switcher * *************************************/ void cyberbal_set_screen(int which) { if (which < total_screens) current_screen = which; } /************************************* * * Palette tweaker * *************************************/ INLINE void set_palette_entry(int entry, UINT16 value) { int r, g, b; r = ((value >> 9) & 0x3e) | ((value >> 15) & 1); g = ((value >> 4) & 0x3e) | ((value >> 15) & 1); b = ((value << 1) & 0x3e) | ((value >> 15) & 1); palette_set_color_rgb(Machine, entry, pal6bit(r), pal6bit(g), pal6bit(b)); } /************************************* * * Palette RAM write handlers * *************************************/ WRITE16_HANDLER( cyberbal_paletteram_0_w ) { COMBINE_DATA(&cyberbal_paletteram_0[offset]); set_palette_entry(offset, cyberbal_paletteram_0[offset]); } READ16_HANDLER( cyberbal_paletteram_0_r ) { return cyberbal_paletteram_0[offset]; } WRITE16_HANDLER( cyberbal_paletteram_1_w ) { COMBINE_DATA(&cyberbal_paletteram_1[offset]); set_palette_entry(offset + 0x800, cyberbal_paletteram_1[offset]); } READ16_HANDLER( cyberbal_paletteram_1_r ) { return cyberbal_paletteram_1[offset]; } /************************************* * * Periodic scanline updater * *************************************/ void cyberbal_scanline_update(running_machine *machine, int scrnum, int scanline) { int i; /* loop over screens */ for (i = 0; i < total_screens; i++) { UINT16 *vram = i ? atarigen_alpha2 : atarigen_alpha; UINT16 *base = &vram[((scanline - 8) / 8) * 64 + 47]; int update_screen = i; /* keep in range */ if (base < vram) base += 0x800; else if (base >= &vram[0x800]) return; /* update the current parameters */ if (!(base[3] & 1)) { if (((base[3] >> 1) & 7) != playfield_palette_bank[i]) { video_screen_update_partial(update_screen, scanline - 1); playfield_palette_bank[i] = (base[3] >> 1) & 7; tilemap_set_palette_offset(i ? atarigen_playfield2_tilemap : atarigen_playfield_tilemap, playfield_palette_bank[i] << 8); } } if (!(base[4] & 1)) { int newscroll = 2 * (((base[4] >> 7) + 4) & 0x1ff); if (newscroll != playfield_xscroll[i]) { video_screen_update_partial(update_screen, scanline - 1); tilemap_set_scrollx(i ? atarigen_playfield2_tilemap : atarigen_playfield_tilemap, 0, newscroll); playfield_xscroll[i] = newscroll; } } if (!(base[5] & 1)) { /* a new vscroll latches the offset into a counter; we must adjust for this */ int newscroll = ((base[5] >> 7) - (scanline)) & 0x1ff; if (newscroll != playfield_yscroll[i]) { video_screen_update_partial(update_screen, scanline - 1); tilemap_set_scrolly(i ? atarigen_playfield2_tilemap : atarigen_playfield_tilemap, 0, newscroll); playfield_yscroll[i] = newscroll; } } if (!(base[7] & 1)) { if (current_slip[i] != base[7]) { video_screen_update_partial(update_screen, scanline - 1); current_slip[i] = base[7]; } } } } /************************************* * * Main refresh * *************************************/ static void update_one_screen(running_machine* machine, int screen, mame_bitmap *bitmap, const rectangle *cliprect) { struct atarimo_rect_list rectlist; rectangle tempclip = *cliprect; mame_bitmap *mobitmap; int x, y, r, mooffset, temp; /* draw the playfield */ tilemap_draw(bitmap, cliprect, screen ? atarigen_playfield2_tilemap : atarigen_playfield_tilemap, 0, 0); /* draw the MOs -- note some kludging to get this to work correctly for 2 screens */ mooffset = 0; tempclip.min_x -= mooffset; tempclip.max_x -= mooffset; temp = machine->screen[screen].visarea.max_x; if (temp > SCREEN_WIDTH) machine->screen[screen].visarea.max_x /= 2; mobitmap = atarimo_render(machine, screen, cliprect, &rectlist); tempclip.min_x += mooffset; tempclip.max_x += mooffset; machine->screen[screen].visarea.max_x = temp; /* draw and merge the MO */ 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 + mooffset; for (x = rectlist.rect->min_x; x <= rectlist.rect->max_x; x++) if (mo[x]) { /* not verified: logic is all controlled in a PAL */ pf[x] = mo[x]; /* erase behind ourselves */ mo[x] = 0; } } /* add the alpha on top */ tilemap_draw(bitmap, cliprect, screen ? atarigen_alpha2_tilemap : atarigen_alpha_tilemap, 0, 0); } VIDEO_UPDATE( cyberbal ) { update_one_screen(machine, screen, bitmap, cliprect); return 0; }