/********************************************************************************** Fun World / Amatic / TAB / Impera. Series 7000 hardware. Video Hardware. Written by Roberto Fresca. *********************************************************************************** TAB/Impera/FunWorld color system circuitry ------------------------------------------ 74HC174 - Hex D-type flip-flops with reset; positive-edge trigger. N82S147 - 4K-bit TTL Bipolar PROM. 74LS374 - 3-STATE Octal D-Type transparent latches and edge-triggered flip-flops. N82S147 74LS374 RESNET PULL-DOWN 74HC174 .-------. .-------. .-------. (1)-|01 20|--VCC--|20 02|------[(1K)]---+ .-----. | | (1)-|02 06|-------|03 05|------[(470)]--+--+-----------| RED | |16: VCC| (1)-|03 07|-------|04 06|------[(220)]--+ | '-----' | | (1)-|04 08|-------|07 | '--[(100)]--GND | 02|-------|05 09|-------|08 09|------[(1K)]---+ .------. | 05|-------|16 11|-------|13 12|------[(470)]--+--+-----------| BLUE | | 07|-------|17 12|-------|14 15|------[(220)]--+ | '------' | 10|-------|18 13|-------|17 | '--[(100)]--GND | 12|-------|19 14|-------|18 16|------[(470)]--+ .-------. | 13|---+---|15 10|---+---|10 19|------[(220)]--+--+-----------| GREEN | |15 08 | | | | | | 01 | | '-------' '-+--+--' | '-------' | '----+--' '--[(100)]--GND | | | | | | '------+------GND------' | '----------------------------------' (1): Connected either to: - A custom 40-pin GFX IC - 2x HYxxx devices (TAB blue PCB). - A little board with 4x 74LS138 or 74LS137 (Impera green PCB). NOTE: The 74LS374 could be replaced by a 74HCT373. ***********************************************************************************/ #include "emu.h" #include "video/resnet.h" #include "includes/funworld.h" PALETTE_INIT_MEMBER(funworld_state,funworld) { const UINT8 *color_prom = machine().root_device().memregion("proms")->base(); int i; static const int resistances_rb[3] = { 1000, 470, 220 }; static const int resistances_g [2] = { 470, 220 }; double weights_r[3], weights_b[3], weights_g[2]; compute_resistor_weights(0, 255, -1.0, 3, resistances_rb, weights_r, 100, 0, 3, resistances_rb, weights_b, 100, 0, 2, resistances_g, weights_g, 100, 0); for (i = 0; i < machine().total_colors(); i++) { int bit0, bit1, bit2, r, g, b; /* red component */ bit0 = (color_prom[i] >> 0) & 0x01; bit1 = (color_prom[i] >> 1) & 0x01; bit2 = (color_prom[i] >> 2) & 0x01; r = combine_3_weights(weights_r, bit0, bit1, bit2); /* blue component */ bit0 = (color_prom[i] >> 3) & 0x01; bit1 = (color_prom[i] >> 4) & 0x01; bit2 = (color_prom[i] >> 5) & 0x01; b = combine_3_weights(weights_b, bit0, bit1, bit2); /* green component */ bit0 = (color_prom[i] >> 6) & 0x01; bit1 = (color_prom[i] >> 7) & 0x01; g = combine_2_weights(weights_g, bit0, bit1); palette_set_color(machine(),i,MAKE_RGB(r,g,b)); } } WRITE8_MEMBER(funworld_state::funworld_videoram_w) { m_videoram[offset] = data; m_bg_tilemap->mark_tile_dirty(offset); } WRITE8_MEMBER(funworld_state::funworld_colorram_w) { m_colorram[offset] = data; m_bg_tilemap->mark_tile_dirty(offset); } /**** normal hardware limit **** - bits - 7654 3210 xxxx xx-- tiles color. xxx- x-xx tiles color (title). xxxx -xxx tiles color (background). */ TILE_GET_INFO_MEMBER(funworld_state::get_bg_tile_info) { /* - bits - 7654 3210 xxxx ---- tiles color. ---- xxxx unused. */ int offs = tile_index; int attr = m_videoram[offs] + (m_colorram[offs] << 8); int code = attr & 0xfff; int color = m_colorram[offs] >> 4; // 4 bits for color. SET_TILE_INFO_MEMBER(0, code, color, 0); } VIDEO_START_MEMBER(funworld_state,funworld) { m_bg_tilemap = &machine().tilemap().create(tilemap_get_info_delegate(FUNC(funworld_state::get_bg_tile_info),this), TILEMAP_SCAN_ROWS, 4, 8, 96, 29); } VIDEO_START_MEMBER(funworld_state,magicrd2) { m_bg_tilemap = &machine().tilemap().create(tilemap_get_info_delegate(FUNC(funworld_state::get_bg_tile_info),this), TILEMAP_SCAN_ROWS, 4, 8, 112, 34); } UINT32 funworld_state::screen_update_funworld(screen_device &screen, bitmap_ind16 &bitmap, const rectangle &cliprect) { m_bg_tilemap->draw(bitmap, cliprect, 0, 0); return 0; }