初始提交

2025-06-27 00:32:57 +08:00
commit e40bb2ba8a
5134 changed files with 2158460 additions and 0 deletions
--- a/Project/Src/NES/mapper/234.cpp
+++ b/Project/Src/NES/mapper/234.cpp
@@ -0,0 +1,134 @@
+
+/////////////////////////////////////////////////////////////////////
+// Mapper 234
+void NES_mapper234::Reset()
+{
+  regs[0] = regs[1] = regs[2] = 0;
+  Sync();
+}
+
+void NES_mapper234::MemoryReadSaveRAM(uint32 addr)
+{
+  NES_6502::Context context;
+  parent_NES->cpu->GetContext(&context);
+  uint8 data = context.mem_page[addr >> 13][addr & 0x1fff];
+
+  switch(addr & 0xFFF8)
+  {
+    case 0xFF80:
+    case 0xFF88:
+    case 0xFF90:
+    case 0xFF98:
+      {
+        if(!regs[0])
+        {
+          regs[0] = data;
+          Sync();
+        }
+      }
+      break;
+
+    case 0xFFC0:
+    case 0xFFC8:
+    case 0xFFD0:
+    case 0xFFD8:
+      {
+        if(!regs[2])
+        {
+          regs[2] = data;
+          Sync();
+        }
+      }
+      break;
+
+    case 0xFFE8:
+    case 0xFFF0:
+      {
+        regs[1] = data;
+      }
+      break;
+  }
+}
+
+void NES_mapper234::MemoryWrite(uint32 addr, uint8 data)
+{
+  switch(addr & 0xFFF8)
+  {
+    case 0xFF80:
+    case 0xFF88:
+    case 0xFF90:
+    case 0xFF98:
+      {
+        if(!regs[0])
+        {
+          regs[0] = data;
+          Sync();
+        }
+      }
+      break;
+
+    case 0xFFC0:
+    case 0xFFC8:
+    case 0xFFD0:
+    case 0xFFD8:
+      {
+        if(!regs[2])
+        {
+          regs[2] = data;
+          Sync();
+        }
+      }
+      break;
+
+    case 0xFFE8:
+    case 0xFFF0:
+      {
+        regs[1] = data;
+      }
+      break;
+  }
+}
+
+void NES_mapper234::Sync()
+{
+  if(regs[0] & 0x80)
+  {
+    set_mirroring(NES_PPU::MIRROR_HORIZ);
+  }
+  else
+  {
+    set_mirroring(NES_PPU::MIRROR_VERT);
+  }
+  if (regs[0] & 0x40)
+  {
+    set_CPU_bank4(((regs[0] & 0x0E)|(regs[1] & 0x01))*4+0);
+    set_CPU_bank5(((regs[0] & 0x0E)|(regs[1] & 0x01))*4+1);
+    set_CPU_bank6(((regs[0] & 0x0E)|(regs[1] & 0x01))*4+2);
+    set_CPU_bank7(((regs[0] & 0x0E)|(regs[1] & 0x01))*4+3);
+    set_PPU_bank0((((regs[0] & 0x0E)<<2)|((regs[1] & 0x70)>>4))*8+0);
+    set_PPU_bank1((((regs[0] & 0x0E)<<2)|((regs[1] & 0x70)>>4))*8+1);
+    set_PPU_bank2((((regs[0] & 0x0E)<<2)|((regs[1] & 0x70)>>4))*8+2);
+    set_PPU_bank3((((regs[0] & 0x0E)<<2)|((regs[1] & 0x70)>>4))*8+3);
+    set_PPU_bank4((((regs[0] & 0x0E)<<2)|((regs[1] & 0x70)>>4))*8+4);
+    set_PPU_bank5((((regs[0] & 0x0E)<<2)|((regs[1] & 0x70)>>4))*8+5);
+    set_PPU_bank6((((regs[0] & 0x0E)<<2)|((regs[1] & 0x70)>>4))*8+6);
+    set_PPU_bank7((((regs[0] & 0x0E)<<2)|((regs[1] & 0x70)>>4))*8+7);
+  }
+  else
+  {
+    set_CPU_bank4((regs[0] & 0x0F)*4+0);
+    set_CPU_bank5((regs[0] & 0x0F)*4+1);
+    set_CPU_bank6((regs[0] & 0x0F)*4+2);
+    set_CPU_bank7((regs[0] & 0x0F)*4+3);
+    set_PPU_bank0((((regs[0] & 0x0F)<<2)|((regs[1] & 0x30)>>4))*8+0);
+    set_PPU_bank1((((regs[0] & 0x0F)<<2)|((regs[1] & 0x30)>>4))*8+1);
+    set_PPU_bank2((((regs[0] & 0x0F)<<2)|((regs[1] & 0x30)>>4))*8+2);
+    set_PPU_bank3((((regs[0] & 0x0F)<<2)|((regs[1] & 0x30)>>4))*8+3);
+    set_PPU_bank4((((regs[0] & 0x0F)<<2)|((regs[1] & 0x30)>>4))*8+4);
+    set_PPU_bank5((((regs[0] & 0x0F)<<2)|((regs[1] & 0x30)>>4))*8+5);
+    set_PPU_bank6((((regs[0] & 0x0F)<<2)|((regs[1] & 0x30)>>4))*8+6);
+    set_PPU_bank7((((regs[0] & 0x0F)<<2)|((regs[1] & 0x30)>>4))*8+7);
+  }
+}
+/////////////////////////////////////////////////////////////////////
+