@Override
public final void cartWrite(final int addr, final int data) {
if (addr < 0x8000 || addr > 0xffff) {
super.cartWrite(addr, data);
return;
}
int prgselect = (byte) (data & 0xF);
// remap PRG bank
for (int i = 0; i < 16; ++i) {
prg_map[16 + i] = (1024 * (i + 16 * prgselect)) & (prgsize - 1);
}
int mirroring = data >> 6;
switch (mirroring) {
case 0:
setmirroring(MirrorType.SS_MIRROR0);
break;
case 1:
setmirroring(MirrorType.H_MIRROR);
break;
case 2:
setmirroring(MirrorType.V_MIRROR);
break;
case 3:
setmirroring(MirrorType.SS_MIRROR1);
break;
}
}
@Override
public final void cartWrite(final int addr, final int data) {
// System.out.println(data);
if (addr < 0x8000 || addr > 0xffff) {
super.cartWrite(addr, data);
return;
}
int prgselect = data & 7;
int chrselect = (data >> 4) & 0xf;
if (crc == 0x42392440) // Cosmo Carrier
{
setmirroring(((data & (utils.BIT3)) != 0) ? MirrorType.SS_MIRROR1 : MirrorType.SS_MIRROR0);
} else {
setmirroring(((data & (utils.BIT3)) != 0) ? MirrorType.V_MIRROR : MirrorType.H_MIRROR);
}
// remap CHR bank
for (int i = 0; i < 8; ++i) {
chr_map[i] = (1024 * (i + 8 * chrselect)) & (chrsize - 1);
}
// remap PRG bank
for (int i = 0; i < 16; ++i) {
prg_map[i] = (1024 * (i + 16 * prgselect)) & (prgsize - 1);
}
}
@Override
public final void cartWrite(final int addr, final int data) {
if (addr < 0x8000 || addr > 0xffff) {
super.cartWrite(addr, data);
return;
}
// remap all 32k of PRG to 32 x bank #
for (int i = 0; i < 32; ++i) {
prg_map[i] = (1024 * (i + (32 * (data & 15)))) & (prgsize - 1);
}
setmirroring(((data & (utils.BIT4)) != 0) ? MirrorType.SS_MIRROR1 : MirrorType.SS_MIRROR0);
}
@Override
public final void cartWrite(final int addr, final int data) {
if (addr < 0x8000 || addr > 0xffff) {
super.cartWrite(addr, data);
return;
}
final boolean bit0 = utils.getbit(addr, registers[0]);
final boolean bit1 = utils.getbit(addr, registers[1]);
switch (addr >> 12) {
case 0x8:
// 8000-8003: prg bank 0 select
prgbank0 = data;
setbanks();
break;
case 0x9:
case 0xa:
// sound registers here
sndchip.write((addr & 0xf000) + (bit1 ? 2 : 0) + (bit0 ? 1 : 0), data);
break;
case 0xc:
// c000-c003: prg bank 1 select
prgbank1 = data;
setbanks();
break;
case 0xb:
if (bit0 && bit1) {
// mirroring select
switch ((data >> 2) & 3) {
case 0:
setmirroring(Mapper.MirrorType.V_MIRROR);
break;
case 1:
setmirroring(Mapper.MirrorType.H_MIRROR);
break;
case 2:
setmirroring(Mapper.MirrorType.SS_MIRROR0);
break;
case 3:
setmirroring(Mapper.MirrorType.SS_MIRROR1);
break;
}
} else {
// expansion sound register here as well
sndchip.write((addr & 0xf000) + (bit1 ? 2 : 0) + (bit0 ? 1 : 0), data);
}
break;
case 0xd:
// character bank selects
chrbank[(bit1 ? 2 : 0) + (bit0 ? 1 : 0)] = data;
setbanks();
break;
case 0xe:
chrbank[(bit1 ? 2 : 0) + (bit0 ? 1 : 0) + 4] = data;
setbanks();
break;
case 0xf:
// irq control
if (!bit1) {
if (!bit0) {
irqreload = data;
} else {
irqack = utils.getbit(data, 0);
irqenable = utils.getbit(data, 1);
irqmode = utils.getbit(data, 2);
if (irqenable) {
irqcounter = irqreload;
prescaler = 341;
}
if (firedinterrupt) {
--cpu.interrupt;
}
firedinterrupt = false;
}
} else {
if (!bit0) {
irqenable = irqack;
if (firedinterrupt) {
--cpu.interrupt;
}
firedinterrupt = false;
}
}
}
}
@Override
public final void cartWrite(final int addr, final int data) {
if (addr < 0x8000 || addr > 0xFFFF) {
super.cartWrite(addr, data);
return;
} else if (addr <= 0x9FFF) {
switch (addr & 3) {
case 0:
prgbank0 = data;
setbanks();
break;
case 1:
prgbank1 = data;
setbanks();
break;
case 2:
chrbank[0] = data;
setbanks();
break;
case 3:
chrbank[1] = data;
setbanks();
break;
}
} else if (addr <= 0xBFFF) {
switch (addr & 3) {
case 0:
chrbank[2] = data;
setbanks();
break;
case 1:
chrbank[3] = data;
setbanks();
break;
case 2:
chrbank[4] = data;
setbanks();
break;
case 3:
chrbank[5] = data;
setbanks();
break;
}
} else if (addr <= 0xDFFF) {
switch (addr & 3) {
case 0:
// value written here used to reload irq counter _@ end of scanline_
irqctrreload = data & 0xFF;
irqreload = true;
break;
case 1:
// any value here reloads irq counter
irqctr = data;
irqreload = true;
break;
case 2:
// any value here enables interrupts
irqenable = true;
break;
case 3:
// any value here disables IRQ and acknowledges
if (interrupted) {
--cpu.interrupt;
}
interrupted = false;
irqenable = false;
irqctr = irqctrreload;
break;
}
} else if (addr <= 0xFFFF) {
switch (addr & 3) {
case 0:
setmirroring(utils.getbit(data, 6) ? MirrorType.H_MIRROR : MirrorType.V_MIRROR);
break;
}
}
}
