void Mapper_Fme07::write_register( int index, int data )
{
regs [index] = data;
int prg_bank = index - 0x09;
if ( (unsigned) prg_bank < 3 ) // most common
{
set_prg_bank( 0x8000 | (prg_bank << bank_8k), bank_8k, data );
}
else if ( index == 0x08 )
{
enable_sram( (data & 0xC0) == 0xC0 );
if ( !(data & 0xC0) )
set_prg_bank( 0x6000, bank_8k, data & 0x3F );
}
else if ( index < 0x08 )
{
set_chr_bank( index * 0x400, bank_1k, data );
}
else
{
if ( data & 2 )
mirror_single( data & 1 );
else if ( data & 1 )
mirror_horiz();
else
mirror_vert();
}
}
void Nes_Core::load_state( Nes_State_ const& in )
{
require( cart );
disable_rendering();
error_count = 0;
if ( in.nes_valid )
nes = in.nes;
// always use frame count
ppu.burst_phase = 0; // avoids shimmer when seeking to same time over and over
nes.frame_count = in.nes.frame_count;
if ( (frame_count_t) nes.frame_count == invalid_frame_count )
nes.frame_count = 0;
if ( in.cpu_valid )
cpu::r = *in.cpu;
if ( in.joypad_valid )
joypad = *in.joypad;
if ( in.apu_valid )
{
impl->apu.load_state( *in.apu );
// prevent apu from running extra at beginning of frame
impl->apu.end_frame( -(int) nes.timestamp / ppu_overclock );
}
else
{
impl->apu.reset();
}
ppu.load_state( in );
if ( in.ram_valid )
memcpy( cpu::low_mem, in.ram, in.ram_size );
sram_present = false;
if ( in.sram_size )
{
sram_present = true;
memcpy( impl->sram, in.sram, min( (int) in.sram_size, (int) sizeof impl->sram ) );
enable_sram( true ); // mapper can override (read-only, unmapped, etc.)
}
if ( in.mapper_valid ) // restore last since it might reconfigure things
mapper->load_state( *in.mapper );
}
