// license:BSD-3-Clause // copyright-holders:Nicola Salmoria #include "emu.h" #include "includes/gberet.h" /*************************************************************************** Convert the color PROMs into a more useable format. Green Beret has a 32 bytes palette PROM and two 256 bytes color lookup table PROMs (one for sprites, one for characters). The palette PROM is connected to the RGB output, this way: bit 7 -- 220 ohm resistor -- BLUE -- 470 ohm resistor -- BLUE -- 220 ohm resistor -- GREEN -- 470 ohm resistor -- GREEN -- 1 kohm resistor -- GREEN -- 220 ohm resistor -- RED -- 470 ohm resistor -- RED bit 0 -- 1 kohm resistor -- RED ***************************************************************************/ PALETTE_INIT_MEMBER(gberet_state,gberet) { const uint8_t *color_prom = memregion("proms")->base(); int i; /* create a lookup table for the palette */ for (i = 0; i < 0x20; i++) { int bit0, bit1, bit2; int r, g, b; /* red component */ bit0 = (color_prom[i] >> 0) & 0x01; bit1 = (color_prom[i] >> 1) & 0x01; bit2 = (color_prom[i] >> 2) & 0x01; r = 0x21 * bit0 + 0x47 * bit1 + 0x97 * bit2; /* green component */ bit0 = (color_prom[i] >> 3) & 0x01; bit1 = (color_prom[i] >> 4) & 0x01; bit2 = (color_prom[i] >> 5) & 0x01; g = 0x21 * bit0 + 0x47 * bit1 + 0x97 * bit2; /* blue component */ bit0 = 0; bit1 = (color_prom[i] >> 6) & 0x01; bit2 = (color_prom[i] >> 7) & 0x01; b = 0x21 * bit0 + 0x47 * bit1 + 0x97 * bit2; palette.set_indirect_color(i, rgb_t(r, g, b)); } /* color_prom now points to the beginning of the lookup table */ color_prom += 0x20; for (i = 0; i < 0x100; i++) { uint8_t ctabentry = (color_prom[i] & 0x0f) | 0x10; palette.set_pen_indirect(i, ctabentry); } for (i = 0x100; i < 0x200; i++) { uint8_t ctabentry; if (color_prom[i] & 0x0f) ctabentry = color_prom[i] & 0x0f; else ctabentry = 0; palette.set_pen_indirect(i, ctabentry); } } WRITE8_MEMBER(gberet_state::gberet_videoram_w) { m_videoram[offset] = data; m_bg_tilemap->mark_tile_dirty(offset); } WRITE8_MEMBER(gberet_state::gberet_colorram_w) { m_colorram[offset] = data; m_bg_tilemap->mark_tile_dirty(offset); } WRITE8_MEMBER(gberet_state::gberet_scroll_w) { int scroll; m_scrollram[offset] = data; scroll = m_scrollram[offset & 0x1f] | (m_scrollram[offset | 0x20] << 8); m_bg_tilemap->set_scrollx(offset & 0x1f, scroll); } WRITE8_MEMBER(gberet_state::gberet_sprite_bank_w) { m_spritebank = data; } TILE_GET_INFO_MEMBER(gberet_state::get_bg_tile_info) { int attr = m_colorram[tile_index]; int code = m_videoram[tile_index] + ((attr & 0x40) << 2); int color = attr & 0x0f; int flags = TILE_FLIPYX((attr & 0x30) >> 4); tileinfo.group = color; tileinfo.category = (attr & 0x80) >> 7; SET_TILE_INFO_MEMBER(0, code, color, flags); } VIDEO_START_MEMBER(gberet_state,gberet) { m_bg_tilemap = &machine().tilemap().create(*m_gfxdecode, tilemap_get_info_delegate(FUNC(gberet_state::get_bg_tile_info),this), TILEMAP_SCAN_ROWS, 8, 8, 64, 32); m_bg_tilemap->configure_groups(*m_gfxdecode->gfx(0), 0x10); m_bg_tilemap->set_scroll_rows(32); } void gberet_state::gberet_draw_sprites( bitmap_ind16 &bitmap, const rectangle &cliprect ) { int offs; uint8_t *sr; if (m_spritebank & 0x08) sr = m_spriteram2; else sr = m_spriteram; for (offs = 0; offs < 0xc0; offs += 4) { if (sr[offs + 3]) { int attr = sr[offs + 1]; int code = sr[offs + 0] + ((attr & 0x40) << 2); int color = attr & 0x0f; int sx = sr[offs + 2] - 2 * (attr & 0x80); int sy = sr[offs + 3]; int flipx = attr & 0x10; int flipy = attr & 0x20; if (flip_screen()) { sx = 240 - sx; sy = 240 - sy; flipx = !flipx; flipy = !flipy; } m_gfxdecode->gfx(1)->transmask(bitmap,cliprect, code, color, flipx, flipy, sx, sy, m_palette->transpen_mask(*m_gfxdecode->gfx(1), color, 0)); } } } uint32_t gberet_state::screen_update_gberet(screen_device &screen, bitmap_ind16 &bitmap, const rectangle &cliprect) { m_bg_tilemap->draw(screen, bitmap, cliprect, TILEMAP_DRAW_OPAQUE | TILEMAP_DRAW_ALL_CATEGORIES, 0); gberet_draw_sprites(bitmap, cliprect); m_bg_tilemap->draw(screen, bitmap, cliprect, 0, 0); return 0; } /* Green Beret (bootleg) */ WRITE8_MEMBER(gberet_state::gberetb_scroll_w) { int scroll = data; if (offset) scroll |= 0x100; for (offset = 6; offset < 29; offset++) m_bg_tilemap->set_scrollx(offset, scroll + 64 - 8); } void gberet_state::gberetb_draw_sprites( bitmap_ind16 &bitmap, const rectangle &cliprect ) { uint8_t *spriteram = m_spriteram; int offs; for (offs = m_spriteram.bytes() - 4; offs >= 0; offs -= 4) { if (spriteram[offs + 1]) { int attr = spriteram[offs + 3]; int code = spriteram[offs] + ((attr & 0x40) << 2); int color = attr & 0x0f; int sx = spriteram[offs + 2] - 2 * (attr & 0x80); int sy = 240 - spriteram[offs + 1]; int flipx = attr & 0x10; int flipy = attr & 0x20; if (flip_screen()) { sx = 240 - sx; sy = 240 - sy; flipx = !flipx; flipy = !flipy; } m_gfxdecode->gfx(1)->transmask(bitmap,cliprect, code, color, flipx, flipy, sx, sy, m_palette->transpen_mask(*m_gfxdecode->gfx(1), color, 0)); } } } uint32_t gberet_state::screen_update_gberetb(screen_device &screen, bitmap_ind16 &bitmap, const rectangle &cliprect) { m_bg_tilemap->draw(screen, bitmap, cliprect, TILEMAP_DRAW_OPAQUE | TILEMAP_DRAW_ALL_CATEGORIES, 0); gberetb_draw_sprites(bitmap, cliprect); m_bg_tilemap->draw(screen, bitmap, cliprect, 0, 0); return 0; }