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/***************************************************************************
video/nes.c
Routines to control the unique NES video hardware/PPU.
***************************************************************************/
#include "emu.h"
#include "video/ppu2c0x.h"
#include "includes/nes.h"
//#include "includes/nes_mmc.h"
void nes_state::video_reset()
{
m_ppu->set_vidaccess_callback(ppu2c0x_vidaccess_delegate(FUNC(nes_state::nes_ppu_vidaccess),this));
}
void nes_state::video_start()
{
m_last_frame_flip = 0;
}
void nes_state::palette_init()
{
m_ppu->init_palette(machine(), 0);
}
/***************************************************************************
Display refresh
***************************************************************************/
UINT32 nes_state::screen_update_nes(screen_device &screen, bitmap_ind16 &bitmap, const rectangle &cliprect)
{
/* render the ppu */
m_ppu->render(bitmap, 0, 0, 0, 0);
/* if this is a disk system game, check for the flip-disk key */
if (m_disk_expansion && m_pcb_id == NO_BOARD)
{
// latch this input so it doesn't go at warp speed
if ((ioport("FLIPDISK")->read() & 0x01) && (!m_last_frame_flip))
{
m_last_frame_flip = 1;
m_fds_current_side++;
if (m_fds_current_side > m_fds_sides)
m_fds_current_side = 0;
if (m_fds_current_side == 0)
popmessage("No disk inserted.");
else
popmessage("Disk set to side %d", m_fds_current_side);
}
if (!(ioport("FLIPDISK")->read() & 0x01))
m_last_frame_flip = 0;
}
return 0;
}
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