diff --git a/core/cd_hw/scd.c b/core/cd_hw/scd.c
index 1026506..d0df6bd 100644
--- a/core/cd_hw/scd.c
+++ b/core/cd_hw/scd.c
@@ -1201,8 +1201,8 @@ void scd_reset(int hard)
     scd.dmna = 0;
 
     /* H-INT default vector */
-    *(uint16 *)(m68k.memory_map[0].base + 0x70) = 0x00FF;
-    *(uint16 *)(m68k.memory_map[0].base + 0x72) = 0xFFFF;
+    *(uint16 *)(m68k.memory_map[scd.cartridge.boot].base + 0x70) = 0x00FF;
+    *(uint16 *)(m68k.memory_map[scd.cartridge.boot].base + 0x72) = 0xFFFF;
 
     /* Power ON initial values (MAIN-CPU side) */
     scd.regs[0x00>>1].w = 0x0002;
@@ -1405,7 +1405,7 @@ int scd_context_save(uint8 *state)
   save_param(&s68k.poll, sizeof(s68k.poll));
 
   /* H-INT default vector */
-  tmp16 = *(uint16 *)(m68k.memory_map[0].base + 0x72);
+  tmp16 = *(uint16 *)(m68k.memory_map[scd.cartridge.boot].base + 0x72);
   save_param(&tmp16, 2);
 
   /* SUB-CPU internal state */
@@ -1606,7 +1606,7 @@ int scd_context_load(uint8 *state)
 
   /* H-INT default vector */
   load_param(&tmp16, 2);
-  *(uint16 *)(m68k.memory_map[0].base + 0x72) = tmp16;
+  *(uint16 *)(m68k.memory_map[scd.cartridge.boot].base + 0x72) = tmp16;
 
   /* SUB-CPU internal state */
   load_param(&s68k.cycles, sizeof(s68k.cycles));
diff --git a/core/mem68k.c b/core/mem68k.c
index 78f2d82..bdef7ba 100644
--- a/core/mem68k.c
+++ b/core/mem68k.c
@@ -482,7 +482,7 @@ unsigned int ctrl_io_read_word(unsigned int address)
         /* H-INT vector (word access only ?) */
         if (index == 0x06)
         {
-          return *(uint16 *)(m68k.memory_map[0].base + 0x72);
+          return *(uint16 *)(m68k.memory_map[scd.cartridge.boot].base + 0x72);
         }
 
         /* Stopwatch counter (word read access only ?) */
@@ -940,7 +940,7 @@ void ctrl_io_write_word(unsigned int address, unsigned int data)
 
           case 0x06:  /* H-INT vector (word access only ?) */
           {
-            *(uint16 *)(m68k.memory_map[0].base + 0x72) = data;
+            *(uint16 *)(m68k.memory_map[scd.cartridge.boot].base + 0x72) = data;
             return;
           }
 
@@ -948,7 +948,7 @@ void ctrl_io_write_word(unsigned int address, unsigned int data)
           {
             m68k_poll_sync(1<<0x0e);
 
-      		/* D8-D15 ignored -> only MAIN-CPU flags are updated (Mortal Kombat) */
+            /* D8-D15 ignored -> only MAIN-CPU flags are updated (Mortal Kombat) */
             scd.regs[0x0e>>1].byte.h = data & 0xff;
             return;
           }