// license:BSD-3-Clause // copyright-holders:Brad Oliver,Fabio Priuli /*************************************************************************** video/nes.c Routines to control the unique NES video hardware/PPU. ***************************************************************************/ #include "emu.h" #include "includes/nes.h" void nes_state::video_reset() { m_ppu->set_vidaccess_callback(ppu2c0x_device::vidaccess_delegate(FUNC(nes_state::nes_ppu_vidaccess),this)); } void nes_state::video_start() { m_last_frame_flip = 0; } /*************************************************************************** Display refresh ***************************************************************************/ uint32_t nes_state::screen_update_nes(screen_device &screen, bitmap_rgb32 &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_cartslot && m_cartslot->exists() && (m_cartslot->get_pcb_id() == STD_DISKSYS)) // first scenario = disksys in m_cartslot (= famicom) || m_disk) // second scenario = disk via fixed internal disk option (fds & famitwin) { if (m_io_disksel) { // latch this input so it doesn't go at warp speed if ((m_io_disksel->read() & 0x01) && (!m_last_frame_flip)) { if (m_disk) m_disk->disk_flip_side(); else m_cartslot->disk_flip_side(); m_last_frame_flip = 1; } if (!(m_io_disksel->read() & 0x01)) m_last_frame_flip = 0; } } return 0; }