#include "emu.h"
#include "includes/higemaru.h"
WRITE8_HANDLER( higemaru_videoram_w )
{
higemaru_state *state = space->machine().driver_data<higemaru_state>();
state->m_videoram[offset] = data;
tilemap_mark_tile_dirty(state->m_bg_tilemap, offset);
}
WRITE8_HANDLER( higemaru_colorram_w )
{
higemaru_state *state = space->machine().driver_data<higemaru_state>();
state->m_colorram[offset] = data;
tilemap_mark_tile_dirty(state->m_bg_tilemap, offset);
}
/***************************************************************************
Convert the color PROMs into a more useable format.
***************************************************************************/
PALETTE_INIT( higemaru )
{
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;
/* characters use colors 0-15 */
for (i = 0; i < 0x80; i++)
{
UINT8 ctabentry = color_prom[i] & 0x0f;
colortable_entry_set_value(machine.colortable, i, ctabentry);
}
/* sprites use colors 16-31 */
for (i = 0x80; i < 0x180; i++)
{
UINT8 ctabentry = (color_prom[i + 0x80] & 0x0f) | 0x10;
colortable_entry_set_value(machine.colortable, i, ctabentry);
}
}
WRITE8_HANDLER( higemaru_c800_w )
{
higemaru_state *state = space->machine().driver_data<higemaru_state>();
if (data & 0x7c)
logerror("c800 = %02x\n",data);
/* bits 0 and 1 are coin counters */
coin_counter_w(space->machine(), 0,data & 2);
coin_counter_w(space->machine(), 1,data & 1);
/* bit 7 flips screen */
if (flip_screen_get(space->machine()) != (data & 0x80))
{
flip_screen_set(space->machine(), data & 0x80);
tilemap_mark_all_tiles_dirty(state->m_bg_tilemap);
}
}
static TILE_GET_INFO( get_bg_tile_info )
{
higemaru_state *state = machine.driver_data<higemaru_state>();
int code = state->m_videoram[tile_index] + ((state->m_colorram[tile_index] & 0x80) << 1);
int color = state->m_colorram[tile_index] & 0x1f;
SET_TILE_INFO(0, code, color, 0);
}
VIDEO_START( higemaru )
{
higemaru_state *state = machine.driver_data<higemaru_state>();
state->m_bg_tilemap = tilemap_create(machine, get_bg_tile_info, tilemap_scan_rows, 8, 8, 32, 32);
}
static void draw_sprites( running_machine &machine, bitmap_t *bitmap, const rectangle *cliprect )
{
higemaru_state *state = machine.driver_data<higemaru_state>();
UINT8 *spriteram = state->m_spriteram;
int offs;
for (offs = state->m_spriteram_size - 16; offs >= 0; offs -= 16)
{
int code,col,sx,sy,flipx,flipy;
code = spriteram[offs] & 0x7f;
col = spriteram[offs + 4] & 0x0f;
sx = spriteram[offs + 12];
sy = spriteram[offs + 8];
flipx = spriteram[offs + 4] & 0x10;
flipy = spriteram[offs + 4] & 0x20;
if (flip_screen_get(machine))
{
sx = 240 - sx;
sy = 240 - sy;
flipx = !flipx;
flipy = !flipy;
}
drawgfx_transpen(bitmap,cliprect,machine.gfx[1],
code,
col,
flipx,flipy,
sx,sy,15);
/* draw again with wraparound */
drawgfx_transpen(bitmap,cliprect,machine.gfx[1],
code,
col,
flipx,flipy,
sx - 256,sy,15);
}
}
SCREEN_UPDATE( higemaru )
{
higemaru_state *state = screen->machine().driver_data<higemaru_state>();
tilemap_draw(bitmap, cliprect, state->m_bg_tilemap, 0, 0);
draw_sprites(screen->machine(), bitmap, cliprect);
return 0;
}