konami_vrc2a.ad

/*
VRCII A0,A1 swap + charcter ROM address bus shiftx1
051744 jumper G?
VRC-CPU|databus 
A0 - A1|A0: xxxx210x
A1 - A0|A1: xxxx6543
VRC-CHRCTER ROM
A11-A17 = A10-A16
*/
board <- {
	mappernum = 22, vram_mirrorfind = false, ppu_ramfind = false,
	cpu_rom = {
		size_base = 1 * mega, size_max = 1 * mega, 
		banksize = 0x2000
	},
	ppu_rom = {
		size_base = 1 * mega, size_max = 1 * mega, 
		banksize = 0x2000 / 8
	}
};
dofile("vrc4.ai");
function cpu_dump(d, pagesize, banksize)
{
	vrc4_cpu_dump(d, pagesize, banksize, 1, 0);
}


function vrc2a_ppubank_set(d, addr, i, j, r0, r1)
{
	local a1 = 1 << r0;
	local a2 = 1 << r1;
	local a3 = a1|a2;

	cpu_write(d, addr | a1, i >> 3);
	cpu_write(d, addr, i << 1);
	cpu_write(d, addr | a3, j >> 3);
	cpu_write(d, addr | a2, j << 1);
}

function ppu_dump(d, pagesize, banksize)
{
	local r0 = 1;
	local r1 = 0;

	for(local i = 0; i < pagesize; i += 8){
		vrc2a_ppubank_set(d, 0xb000, i | 0, i | 1, r0, r1);
		vrc2a_ppubank_set(d, 0xc000, i | 2, i | 3, r0, r1);
		vrc2a_ppubank_set(d, 0xd000, i | 4, i | 5, r0, r1);
		vrc2a_ppubank_set(d, 0xe000, i | 6, i | 7, r0, r1);
		ppu_read(d, 0x0000, banksize * 8);
	}
}