#include "emu.h"
#include "video/ppu2c0x.h"
#include "includes/playch10.h"
WRITE8_HANDLER( playch10_videoram_w )
{
playch10_state *state = space->machine().driver_data<playch10_state>();
UINT8 *videoram = state->m_videoram;
if (state->m_pc10_sdcs)
{
videoram[offset] = data;
tilemap_mark_tile_dirty(state->m_bg_tilemap, offset / 2);
}
}
PALETTE_INIT( playch10 )
{
int i;
for (i = 0; i < 256; i++)
{
int bit0, bit1, bit2, bit3, r, g, b;
/* red component */
bit0 = ~(color_prom[0] >> 0) & 0x01;
bit1 = ~(color_prom[0] >> 1) & 0x01;
bit2 = ~(color_prom[0] >> 2) & 0x01;
bit3 = ~(color_prom[0] >> 3) & 0x01;
r = 0x0e * bit0 + 0x1f * bit1 + 0x43 * bit2 + 0x8f * bit3;
/* green component */
bit0 = ~(color_prom[256] >> 0) & 0x01;
bit1 = ~(color_prom[256] >> 1) & 0x01;
bit2 = ~(color_prom[256] >> 2) & 0x01;
bit3 = ~(color_prom[256] >> 3) & 0x01;
g = 0x0e * bit0 + 0x1f * bit1 + 0x43 * bit2 + 0x8f * bit3;
/* blue component */
bit0 = ~(color_prom[2*256] >> 0) & 0x01;
bit1 = ~(color_prom[2*256] >> 1) & 0x01;
bit2 = ~(color_prom[2*256] >> 2) & 0x01;
bit3 = ~(color_prom[2*256] >> 3) & 0x01;
b = 0x0e * bit0 + 0x1f * bit1 + 0x43 * bit2 + 0x8f * bit3;
palette_set_color(machine,i,MAKE_RGB(r,g,b));
color_prom++;
}
ppu2c0x_init_palette_rgb(machine, 256 );
}
static void ppu_irq( device_t *device, int *ppu_regs )
{
playch10_state *state = device->machine().driver_data<playch10_state>();
cputag_set_input_line(device->machine(), "cart", INPUT_LINE_NMI, PULSE_LINE );
state->m_pc10_int_detect = 1;
}
/* our ppu interface */
/* things like mirroring and whether to use vrom or vram */
/* can be set by calling 'ppu2c0x_override_hardware_options' */
const ppu2c0x_interface playch10_ppu_interface =
{
1, /* gfxlayout num */
256, /* color base */
PPU_MIRROR_NONE, /* mirroring */
ppu_irq /* irq */
};
const ppu2c0x_interface playch10_ppu_interface_hboard =
{
1, /* gfxlayout num */
256, /* color base */
PPU_MIRROR_NONE, /* mirroring */
ppu_irq /* irq */
};
static TILE_GET_INFO( get_bg_tile_info )
{
playch10_state *state = machine.driver_data<playch10_state>();
UINT8 *videoram = state->m_videoram;
int offs = tile_index * 2;
int code = videoram[offs] + ((videoram[offs + 1] & 0x07) << 8);
int color = (videoram[offs + 1] >> 3) & 0x1f;
SET_TILE_INFO(0, code, color, 0);
}
VIDEO_START( playch10 )
{
playch10_state *state = machine.driver_data<playch10_state>();
const UINT8 *bios = machine.region("maincpu")->base();
state->m_pc10_bios = (bios[3] == 0x2a) ? 1 : 2;
state->m_bg_tilemap = tilemap_create(machine, get_bg_tile_info, tilemap_scan_rows,
8, 8, 32, 32);
}
VIDEO_START( playch10_hboard )
{
playch10_state *state = machine.driver_data<playch10_state>();
const UINT8 *bios = machine.region("maincpu")->base();
state->m_pc10_bios = (bios[3] == 0x2a) ? 1 : 2;
state->m_bg_tilemap = tilemap_create(machine, get_bg_tile_info, tilemap_scan_rows,
8, 8, 32, 32);
}
/***************************************************************************
Display refresh
***************************************************************************/
SCREEN_UPDATE( playch10 )
{
playch10_state *state = screen->machine().driver_data<playch10_state>();
device_t *ppu = screen->machine().device("ppu");
/* Dual monitor version */
if (state->m_pc10_bios == 1)
{
device_t *top_screen = screen->machine().device("top");
/* 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 (screen == top_screen)
{
if ( !state->m_pc10_dispmask )
/* render the ppu */
ppu2c0x_render( ppu, bitmap, 0, 0, 0, 0 );
else
bitmap_fill(bitmap, cliprect, 0);
}
else
{
/* When the bios is accessing vram, the video circuitry can't access it */
if ( !state->m_pc10_sdcs )
tilemap_draw(bitmap, cliprect, state->m_bg_tilemap, 0, 0);
else
bitmap_fill(bitmap, cliprect, 0);
}
}
else /* Single Monitor version */
{
rectangle top_monitor = screen->visible_area();
top_monitor.max_y = ( top_monitor.max_y - top_monitor.min_y ) / 2;
if(state->m_pc10_dispmask_old != state->m_pc10_dispmask)
{
state->m_pc10_dispmask_old = state->m_pc10_dispmask;
if(state->m_pc10_dispmask)
state->m_pc10_game_mode ^= 1;
}
if ( state->m_pc10_game_mode )
/* render the ppu */
ppu2c0x_render( ppu, bitmap, 0, 0, 0, 0 );
else
{
/* When the bios is accessing vram, the video circuitry can't access it */
if ( !state->m_pc10_sdcs )
tilemap_draw(bitmap, &top_monitor, state->m_bg_tilemap, 0, 0);
}
}
return 0;
}