[VM][PC9801][MEMBUS] (Maybe) improve address translation.

diff --git a/source/src/vm/pc9801/membus.cpp b/source/src/vm/pc9801/membus.cpp
index b650d14..85c583c 100644 (file)
--- a/source/src/vm/pc9801/membus.cpp
+++ b/source/src/vm/pc9801/membus.cpp
@@ -508,6 +508,12 @@ uint32_t MEMBUS::read_data8(uint32_t addr)
                        return 0xff;
                }
                addr = (addr & 0x1ffff) | window_80000h;
+#if defined(SUPPORT_32BIT_ADDRESS)
+               if((addr >= 0x00f00000) && (addr < 0x01000000)) {
+                       if(addr < 0x00fa0000) return 0xff;
+                       addr = addr - 0x00f00000;
+               }
+#endif
        } else if(addr < 0xc0000) {
 #if defined(SUPPORT_32BIT_ADDRESS)
                if(is_shadow_bank_a0000h) {
@@ -516,6 +522,12 @@ uint32_t MEMBUS::read_data8(uint32_t addr)
                }
 #endif
                addr = (addr & 0x1ffff) | window_a0000h;
+#if defined(SUPPORT_32BIT_ADDRESS)
+               if((addr >= 0x00f00000) && (addr < 0x01000000)) {
+                       if(addr < 0x00fa0000) return 0xff;
+                       addr = addr - 0x00f00000;
+               }
+#endif
        }
        if(addr < 0x10000) {
                last_access_is_interam = false;
@@ -568,6 +580,12 @@ void MEMBUS::write_data8(uint32_t addr, uint32_t data)
                        return;
                }
                addr = (addr & 0x1ffff) | window_80000h;
+#if defined(SUPPORT_32BIT_ADDRESS)
+               if((addr >= 0x00f00000) && (addr < 0x01000000)) {
+                       if(addr < 0x00fa0000) return;
+                       addr = addr - 0x00f00000;
+               }
+#endif
        } else if(addr < 0xc0000) {
 #if defined(SUPPORT_32BIT_ADDRESS)
                if(is_shadow_bank_a0000h) {
@@ -577,6 +595,12 @@ void MEMBUS::write_data8(uint32_t addr, uint32_t data)
                }
 #endif
                addr = (addr & 0x1ffff) | window_a0000h;
+#if defined(SUPPORT_32BIT_ADDRESS)
+               if((addr >= 0x00f00000) && (addr < 0x01000000)) {
+                       if(addr < 0x00fa0000) return;
+                       addr = addr - 0x00f00000;
+               }
+#endif
        }
        if(addr < 0x10000) {
                last_access_is_interam = false;