#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( gberet ) { int i; /* allocate the colortable */ machine.colortable = colortable_alloc(machine, 0x20); /* 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; colortable_palette_set_color(machine.colortable, i, MAKE_RGB(r, g, b)); } /* color_prom now points to the beginning of the lookup table */ color_prom += 0x20; for (i = 0; i < 0x100; i++) { UINT8 ctabentry = (color_prom[i] & 0x0f) | 0x10; colortable_entry_set_value(machine.colortable, i, ctabentry); } for (i = 0x100; i < 0x200; i++) { UINT8 ctabentry; if (color_prom[i] & 0x0f) ctabentry = color_prom[i] & 0x0f; else ctabentry = 0; colortable_entry_set_value(machine.colortable, i, ctabentry); } } WRITE8_HANDLER( gberet_videoram_w ) { gberet_state *state = space->machine().driver_data(); state->m_videoram[offset] = data; tilemap_mark_tile_dirty(state->m_bg_tilemap, offset); } WRITE8_HANDLER( gberet_colorram_w ) { gberet_state *state = space->machine().driver_data(); state->m_colorram[offset] = data; tilemap_mark_tile_dirty(state->m_bg_tilemap, offset); } WRITE8_HANDLER( gberet_scroll_w ) { gberet_state *state = space->machine().driver_data(); int scroll; state->m_scrollram[offset] = data; scroll = state->m_scrollram[offset & 0x1f] | (state->m_scrollram[offset | 0x20] << 8); tilemap_set_scrollx(state->m_bg_tilemap, offset & 0x1f, scroll); } WRITE8_HANDLER( gberet_sprite_bank_w ) { gberet_state *state = space->machine().driver_data(); state->m_spritebank = data; } static TILE_GET_INFO( get_bg_tile_info ) { gberet_state *state = machine.driver_data(); int attr = state->m_colorram[tile_index]; int code = state->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(0, code, color, flags); } VIDEO_START( gberet ) { gberet_state *state = machine.driver_data(); state->m_bg_tilemap = tilemap_create(machine, get_bg_tile_info, tilemap_scan_rows, 8, 8, 64, 32); colortable_configure_tilemap_groups(machine.colortable, state->m_bg_tilemap, machine.gfx[0], 0x10); tilemap_set_scroll_rows(state->m_bg_tilemap, 32); } static void gberet_draw_sprites( running_machine &machine, bitmap_t *bitmap, const rectangle *cliprect ) { gberet_state *state = machine.driver_data(); int offs; UINT8 *sr; if (state->m_spritebank & 0x08) sr = state->m_spriteram2; else sr = state->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_get(machine)) { sx = 240 - sx; sy = 240 - sy; flipx = !flipx; flipy = !flipy; } drawgfx_transmask(bitmap, cliprect, machine.gfx[1], code, color, flipx, flipy, sx, sy, colortable_get_transpen_mask(machine.colortable, machine.gfx[1], color, 0)); } } } SCREEN_UPDATE( gberet ) { gberet_state *state = screen->machine().driver_data(); tilemap_draw(bitmap, cliprect, state->m_bg_tilemap, TILEMAP_DRAW_OPAQUE | TILEMAP_DRAW_ALL_CATEGORIES, 0); gberet_draw_sprites(screen->machine(), bitmap, cliprect); tilemap_draw(bitmap, cliprect, state->m_bg_tilemap, 0, 0); return 0; } /* Green Beret (bootleg) */ WRITE8_HANDLER( gberetb_scroll_w ) { gberet_state *state = space->machine().driver_data(); int scroll = data; if (offset) scroll |= 0x100; for (offset = 6; offset < 29; offset++) tilemap_set_scrollx(state->m_bg_tilemap, offset, scroll + 64 - 8); } static void gberetb_draw_sprites( running_machine &machine, bitmap_t *bitmap, const rectangle *cliprect ) { gberet_state *state = machine.driver_data(); UINT8 *spriteram = state->m_spriteram; int offs; for (offs = state->m_spriteram_size - 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_get(machine)) { sx = 240 - sx; sy = 240 - sy; flipx = !flipx; flipy = !flipy; } drawgfx_transmask(bitmap, cliprect, machine.gfx[1], code, color, flipx, flipy, sx, sy, colortable_get_transpen_mask(machine.colortable, machine.gfx[1], color, 0)); } } } SCREEN_UPDATE( gberetb ) { gberet_state *state = screen->machine().driver_data(); tilemap_draw(bitmap, cliprect, state->m_bg_tilemap, TILEMAP_DRAW_OPAQUE | TILEMAP_DRAW_ALL_CATEGORIES, 0); gberetb_draw_sprites(screen->machine(), bitmap, cliprect); tilemap_draw(bitmap, cliprect, state->m_bg_tilemap, 0, 0); return 0; }