forked from sin365/AxibugEmuOnline
95 lines
2.1 KiB
C#
95 lines
2.1 KiB
C#
namespace MyNes.Core
|
|
{
|
|
[BoardInfo("Irem H-3001", 65)]
|
|
internal class Mapper065 : Board
|
|
{
|
|
private bool irq_enable;
|
|
|
|
private int irq_reload;
|
|
|
|
private int irq_counter;
|
|
|
|
internal override void HardReset()
|
|
{
|
|
base.HardReset();
|
|
Switch08KPRG(0, PRGArea.Area8000);
|
|
Switch08KPRG(1, PRGArea.AreaA000);
|
|
Switch08KPRG(254, PRGArea.AreaC000);
|
|
Switch08KPRG(PRG_ROM_08KB_Mask, PRGArea.AreaE000);
|
|
}
|
|
|
|
internal override void WritePRG(ref ushort address, ref byte data)
|
|
{
|
|
switch (address)
|
|
{
|
|
case 32768:
|
|
Switch08KPRG(data, PRGArea.Area8000);
|
|
break;
|
|
case 36865:
|
|
Switch01KNMTFromMirroring(((data & 0x80) == 128) ? Mirroring.Horz : Mirroring.Vert);
|
|
break;
|
|
case 36867:
|
|
irq_enable = (data & 0x80) == 128;
|
|
NesEmu.IRQFlags &= -9;
|
|
break;
|
|
case 36868:
|
|
irq_counter = irq_reload;
|
|
NesEmu.IRQFlags &= -9;
|
|
break;
|
|
case 36869:
|
|
irq_reload = (irq_reload & 0xFF) | (data << 8);
|
|
break;
|
|
case 36870:
|
|
irq_reload = (irq_reload & 0xFF00) | data;
|
|
break;
|
|
case 40960:
|
|
Switch08KPRG(data, PRGArea.AreaA000);
|
|
break;
|
|
case 49152:
|
|
Switch08KPRG(data, PRGArea.AreaC000);
|
|
break;
|
|
case 45056:
|
|
Switch01KCHR(data, CHRArea.Area0000);
|
|
break;
|
|
case 45057:
|
|
Switch01KCHR(data, CHRArea.Area0400);
|
|
break;
|
|
case 45058:
|
|
Switch01KCHR(data, CHRArea.Area0800);
|
|
break;
|
|
case 45059:
|
|
Switch01KCHR(data, CHRArea.Area0C00);
|
|
break;
|
|
case 45060:
|
|
Switch01KCHR(data, CHRArea.Area1000);
|
|
break;
|
|
case 45061:
|
|
Switch01KCHR(data, CHRArea.Area1400);
|
|
break;
|
|
case 45062:
|
|
Switch01KCHR(data, CHRArea.Area1800);
|
|
break;
|
|
case 45063:
|
|
Switch01KCHR(data, CHRArea.Area1C00);
|
|
break;
|
|
}
|
|
}
|
|
|
|
internal override void OnCPUClock()
|
|
{
|
|
if (irq_enable)
|
|
{
|
|
if (irq_counter > 0)
|
|
{
|
|
irq_counter--;
|
|
}
|
|
else if (irq_counter == 0)
|
|
{
|
|
irq_counter = -1;
|
|
NesEmu.IRQFlags |= 8;
|
|
}
|
|
}
|
|
}
|
|
}
|
|
}
|