/***************************************************************************
Tehkan World Cup - (c) Tehkan 1985
Ernesto Corvi
ernesto@imagina.com
Roberto Juan Fresca
robbiex@rocketmail.com
***************************************************************************/
#include "emu.h"
#include "includes/tehkanwc.h"
WRITE8_HANDLER( tehkanwc_videoram_w )
{
tehkanwc_state *state = space->machine().driver_data<tehkanwc_state>();
state->m_videoram[offset] = data;
tilemap_mark_tile_dirty(state->m_fg_tilemap, offset);
}
WRITE8_HANDLER( tehkanwc_colorram_w )
{
tehkanwc_state *state = space->machine().driver_data<tehkanwc_state>();
state->m_colorram[offset] = data;
tilemap_mark_tile_dirty(state->m_fg_tilemap, offset);
}
WRITE8_HANDLER( tehkanwc_videoram2_w )
{
tehkanwc_state *state = space->machine().driver_data<tehkanwc_state>();
state->m_videoram2[offset] = data;
tilemap_mark_tile_dirty(state->m_bg_tilemap, offset / 2);
}
WRITE8_HANDLER( tehkanwc_scroll_x_w )
{
tehkanwc_state *state = space->machine().driver_data<tehkanwc_state>();
state->m_scroll_x[offset] = data;
}
WRITE8_HANDLER( tehkanwc_scroll_y_w )
{
tehkanwc_state *state = space->machine().driver_data<tehkanwc_state>();
tilemap_set_scrolly(state->m_bg_tilemap, 0, data);
}
WRITE8_HANDLER( tehkanwc_flipscreen_x_w )
{
flip_screen_x_set(space->machine(), data & 0x40);
}
WRITE8_HANDLER( tehkanwc_flipscreen_y_w )
{
flip_screen_y_set(space->machine(), data & 0x40);
}
WRITE8_HANDLER( gridiron_led0_w )
{
tehkanwc_state *state = space->machine().driver_data<tehkanwc_state>();
state->m_led0 = data;
}
WRITE8_HANDLER( gridiron_led1_w )
{
tehkanwc_state *state = space->machine().driver_data<tehkanwc_state>();
state->m_led1 = data;
}
static TILE_GET_INFO( get_bg_tile_info )
{
tehkanwc_state *state = machine.driver_data<tehkanwc_state>();
int offs = tile_index * 2;
int attr = state->m_videoram2[offs + 1];
int code = state->m_videoram2[offs] + ((attr & 0x30) << 4);
int color = attr & 0x0f;
int flags = ((attr & 0x40) ? TILE_FLIPX : 0) | ((attr & 0x80) ? TILE_FLIPY : 0);
SET_TILE_INFO(2, code, color, flags);
}
static TILE_GET_INFO( get_fg_tile_info )
{
tehkanwc_state *state = machine.driver_data<tehkanwc_state>();
int attr = state->m_colorram[tile_index];
int code = state->m_videoram[tile_index] + ((attr & 0x10) << 4);
int color = attr & 0x0f;
int flags = ((attr & 0x40) ? TILE_FLIPX : 0) | ((attr & 0x80) ? TILE_FLIPY : 0);
tileinfo->category = (attr & 0x20) ? 0 : 1;
SET_TILE_INFO(0, code, color, flags);
}
VIDEO_START( tehkanwc )
{
tehkanwc_state *state = machine.driver_data<tehkanwc_state>();
state->m_bg_tilemap = tilemap_create(machine, get_bg_tile_info, tilemap_scan_rows,
16, 8, 32, 32);
state->m_fg_tilemap = tilemap_create(machine, get_fg_tile_info, tilemap_scan_rows,
8, 8, 32, 32);
tilemap_set_transparent_pen(state->m_fg_tilemap, 0);
}
/*
Gridiron Fight has a LED display on the control panel, to let each player
choose the formation without letting the other know.
---0---
| |
5 1
| |
---6---
| |
4 2
| |
---3---
bit 7 = enable (0 = display off)
*/
static void gridiron_draw_led(running_machine &machine, bitmap_t *bitmap, const rectangle *cliprect, UINT8 led,int player)
{
if (led&0x80)
output_set_digit_value(player, led&0x7f);
else
output_set_digit_value(player, 0x00);
}
static void draw_sprites(running_machine &machine, bitmap_t *bitmap, const rectangle *cliprect)
{
tehkanwc_state *state = machine.driver_data<tehkanwc_state>();
UINT8 *spriteram = state->m_spriteram;
int offs;
for (offs = 0;offs < state->m_spriteram_size;offs += 4)
{
int attr = spriteram[offs + 1];
int code = spriteram[offs] + ((attr & 0x08) << 5);
int color = attr & 0x07;
int flipx = attr & 0x40;
int flipy = attr & 0x80;
int sx = spriteram[offs + 2] + ((attr & 0x20) << 3) - 128;
int sy = spriteram[offs + 3];
if (flip_screen_x_get(machine))
{
sx = 240 - sx;
flipx = !flipx;
}
if (flip_screen_y_get(machine))
{
sy = 240 - sy;
flipy = !flipy;
}
drawgfx_transpen(bitmap, cliprect, machine.gfx[1],
code, color, flipx, flipy, sx, sy, 0);
}
}
SCREEN_UPDATE( tehkanwc )
{
tehkanwc_state *state = screen->machine().driver_data<tehkanwc_state>();
tilemap_set_scrollx(state->m_bg_tilemap, 0, state->m_scroll_x[0] + 256 * state->m_scroll_x[1]);
tilemap_draw(bitmap, cliprect, state->m_bg_tilemap, 0, 0);
tilemap_draw(bitmap, cliprect, state->m_fg_tilemap, 0, 0);
draw_sprites(screen->machine(), bitmap, cliprect);
tilemap_draw(bitmap, cliprect, state->m_fg_tilemap, 1, 0);
gridiron_draw_led(screen->machine(), bitmap, cliprect, state->m_led0, 0);
gridiron_draw_led(screen->machine(), bitmap, cliprect, state->m_led1, 1);
return 0;
}