Quote:

---

/***************************************************************************

Display refresh

***************************************************************************/
VIDEO_UPDATE( playch10 )
{
/* Dual monitor version */
if(system_bios == 0)
{
struct rectangle top_monitor = Machine->visible_area;
struct rectangle bottom_monitor = Machine->visible_area;

top_monitor.max_y = ( top_monitor.max_y - top_monitor.min_y ) / 2;
bottom_monitor.min_y = ( bottom_monitor.max_y - bottom_monitor.min_y ) / 2;

/* On Playchoice 10 single monitor, this bit toggles */
/* between PPU and BIOS display. */
/* We support the multi-monitor layout. In this case, */
/* if the bit is not set, then we should display */
/* the PPU portion. */

if ( !pc10_dispmask )
{
/* render the ppu */
ppu2c03b_render( 0, bitmap, 0, 0, 0, 30*8 );

/* if this is a gun game, draw a simple crosshair */
if ( pc10_gun_controller )
{
int x_center = readinputport( 5 );
int y_center = readinputport( 6 ) + 30*8;

draw_crosshair(bitmap, x_center, y_center, &bottom_monitor, 0);
}
}

/* When the bios is accessing vram, the video circuitry can't access it */

if ( !pc10_sdcs )
{
tilemap_draw(bitmap, &top_monitor, bg_tilemap, 0, 0);
}
}
else /* Single Monitor version */
{
struct rectangle top_monitor = Machine->visible_area;

top_monitor.max_y = ( top_monitor.max_y - top_monitor.min_y ) / 2;

if(pc10_dispmask_old != pc10_dispmask)
{
pc10_dispmask_old = pc10_dispmask;

if(pc10_dispmask)
pc10_game_mode ^= 1;
}


if ( pc10_game_mode )
{
/* render the ppu */
ppu2c03b_render( 0, bitmap, 0, 0, 0, 0 );

/* if this is a gun game, draw a simple crosshair */
if ( pc10_gun_controller )
{
int x_center = readinputport( 5 );
int y_center = readinputport( 6 );

draw_crosshair(bitmap, x_center, y_center, &top_monitor, 0);
}
}
else
{
/* When the bios is accessing vram, the video circuitry can't access it */

if ( !pc10_sdcs )
{
tilemap_draw(bitmap, &top_monitor, bg_tilemap, 0, 0);
}