/*
konami VRCIII
RC821
各レジスタは4bit
write
$8000 IRQ cpu clock count, bit0-3??
$9000 IRQ cpu clock count, bit4-7??
$a000 IRQ cpu clock count, bit8-11
$b000 IRQ cpu clock count, bit12-15
$c000 IRQ enable
$d000 IRQ Acknowledge
$f000 bit0-2 pagenumber at CPU address $8000-$bfff
      bit3 1: ROM address 0x1c000-0x1cfff map CPU address $c000-$cfff
           0: IRQ status? at CPU address $c000-$cfff
read
$8000-$bfff 可変エリア, write $f000 bit0-2
$c000-$cfff 可変エリア, write $f000 bit3
$d000-$ffff 固定エリア, ROM address 0x1d000-0x1ffff
*/

board <- {
	mappernum = 73,
	cpu_rom = {
		size_base = 1 * mega, size_max = 8 * mega,
		banksize = 0x4000
	},
	ppu_rom= {
		size_base = 0, size_max = 0,
		banksize = 0x2000
	},
	ppu_ramfind = false, vram_mirrorfind = true
};

function cpu_dump(d, pagesize, banksize)
{
	j <- 0x00;
	k <- 0x00;
	for(local i = 0; i < pagesize; i += 1){
		j = i & 0x07;
		k = i & 0xF8;
		k = k << 1;
		k = k | 0x08;
		k = k | j;
		cpu_write(d, 0xf000, k);
		cpu_read(d, 0x8000, banksize);
	}
}

function program_initalize(d, cpu_banksize, ppu_banksize)
{
/*---- VRC3初期化 ----*/
	cpu_write(d, 0xf000, 0x88);
	cpu_write(d, 0x8000, 0x00);
	cpu_write(d, 0x9000, 0x00);
	cpu_write(d, 0xa000, 0x00);
	cpu_write(d, 0xb000, 0x00);
	cpu_write(d, 0xc000, 0x00);

	cpu_write(d, 0x8000, 0x00);
	cpu_command(d, 0, 0x8000, cpu_banksize);
	cpu_command(d, 0x02aa, 0xc000, cpu_banksize);
	cpu_command(d, 0x0555, 0xc000, cpu_banksize);
}

function cpu_transfer(d, start, end, cpu_banksize)
{
	j <- 0x00;
	k <- 0x00;
	for(local i = start; i < end; i += 1){
		j = i & 0x07;
		k = i & 0xF8;
		k = k << 1;
		k = k | 0x08;
		k = k | j;
		cpu_write(d, 0xf000, k);
		cpu_program(d, 0x8000, cpu_banksize);

	}

}

function ppu_transfer(d, start, end, ppu_banksize)
{}