AxibugEmuOnline/AxibugEmuOnline.Client/Assets/MyNes.Core/Mapper065.cs
2024-07-03 18:22:22 +08:00

95 lines
2.2 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;
}
}
}
}
}