diff --git a/arm/arm_stub.S b/arm/arm_stub.S
index f0b7f52..8e6cc9b 100644
--- a/arm/arm_stub.S
+++ b/arm/arm_stub.S
@@ -43,8 +43,8 @@ _##symbol:
 #define CPU_HALT_STATE    (30 * 4)
 #define CHANGED_PC_STATUS (31 * 4)
 #define COMPLETED_FRAME   (32 * 4)
-
-#define MAIN_THREAD_SP    (33 * 4)
+#define OAM_UPDATED       (33 * 4)
+#define MAIN_THREAD_SP    (34 * 4)
 
 #define reg_a0            r0
 #define reg_a1            r1
diff --git a/cpu.h b/cpu.h
index fc57626..2b250ca 100644
--- a/cpu.h
+++ b/cpu.h
@@ -85,7 +85,8 @@ typedef enum
   CPU_MODE          = 29,
   CPU_HALT_STATE    = 30,
   CHANGED_PC_STATUS = 31,
-  COMPLETED_FRAME   = 32
+  COMPLETED_FRAME   = 32,
+  OAM_UPDATED       = 33
 } ext_reg_numbers;
 
 typedef enum
@@ -146,7 +147,6 @@ extern u8 *ram_translation_ptr;
 
 extern u32 idle_loop_target_pc;
 extern u32 iwram_stack_optimize;
-extern u32 direct_map_vram;
 extern u32 translation_gate_targets;
 extern u32 translation_gate_target_pc[MAX_TRANSLATION_GATES];
 
diff --git a/gba_memory.c b/gba_memory.c
index a51f183..e647304 100644
--- a/gba_memory.c
+++ b/gba_memory.c
@@ -342,14 +342,9 @@ gamepak_swap_entry_type *gamepak_memory_map;
 // a lot.
 FILE *gamepak_file_large = NULL;
 
-u32 direct_map_vram = 0;
-
 // Writes to these respective locations should trigger an update
 // so the related subsystem may react to it.
 
-// If OAM is written to:
-u32 oam_update = 1;
-
 // If GBC audio is written to:
 u32 gbc_sound_update = 0;
 
@@ -755,7 +750,7 @@ cpu_alert_type function_cc write_io_register8(u32 address, u32 value)
       u32 dispcnt = io_registers[REG_DISPCNT];
 
       if((value & 0x07) != (dispcnt & 0x07))
-        oam_update = 1;
+        reg[OAM_UPDATED] = 1;
 
       address8(io_registers, 0x00) = value;
       break;
@@ -1171,7 +1166,7 @@ cpu_alert_type function_cc write_io_register16(u32 address, u32 value)
     {
       u32 dispcnt = io_registers[REG_DISPCNT];
       if((value & 0x07) != (dispcnt & 0x07))
-        oam_update = 1;
+        reg[OAM_UPDATED] = 1;
 
       address16(io_registers, 0x00) = value;
       break;
@@ -1934,7 +1929,7 @@ void function_cc write_rtc(u32 address, u32 value)
                                                                               \
     case 0x07:                                                                \
       /* OAM RAM */                                                           \
-      oam_update = 1;                                                         \
+      reg[OAM_UPDATED] = 1;                                                   \
       address##type(oam_ram, address & 0x3FF) = value;                        \
       break;                                                                  \
                                                                               \
@@ -2529,7 +2524,7 @@ dma_region_type dma_region_map[16] =
   dma_smc_vars_##type()
 
 #define dma_oam_ram_dest()                                                    \
-  oam_update = 1                                                              \
+  reg[OAM_UPDATED] = 1                                                        \
 
 #define dma_vars_oam_ram(type)                                                \
   dma_oam_ram_##type()                                                        \
@@ -3331,7 +3326,7 @@ void gba_load_state(const void* src)
       wipe_caches();
 #endif
 
-   oam_update = 1;
+   reg[OAM_UPDATED] = 1;
    gbc_sound_update = 1;
 
    for(i = 0; i < 512; i++)
diff --git a/main.c b/main.c
index 73371e4..2a82338 100644
--- a/main.c
+++ b/main.c
@@ -158,7 +158,7 @@ u32 update_gba(void)
         if((dispstat & 0x01) == 0)
         {
           u32 i;
-          if(oam_update)
+          if(reg[OAM_UPDATED])
             oam_update_count++;
 
           if(no_alpha)
diff --git a/psp/mips_emit.h b/psp/mips_emit.h
index b996f2b..d24c174 100644
--- a/psp/mips_emit.h
+++ b/psp/mips_emit.h
@@ -2512,7 +2512,8 @@ u8 swi_hle_handle[256] =
 #define ReOff_SaveR1   (21*4) // 3 save scratch regs
 #define ReOff_SaveR2   (22*4)
 #define ReOff_SaveR3   (23*4)
-#define ReOff_GP_Save  (32*4) // GP_SAVE
+#define ReOff_OamUpd   (33*4) // OAM_UPDATED
+#define ReOff_GP_Save  (34*4) // GP_SAVE
 
 // Saves all regs to their right slot and loads gp
 #define emit_save_regs(save_a2) {                                             \
@@ -2873,9 +2874,8 @@ static void emit_pmemst_stub(
   // Post processing store:
   // Signal that OAM was updated
   if (region == 7) {
-    u32 palcaddr = (u32)&oam_update;
-    mips_emit_lui(reg_temp, ((palcaddr + 0x8000) >> 16));
-    mips_emit_sw(reg_base, reg_temp, palcaddr & 0xffff);   // Write any nonzero data
+    // Write any nonzero data
+    mips_emit_sw(reg_base, reg_base, ReOff_OamUpd);
     generate_function_return_swap_delay();
   }
   else {
diff --git a/psp/mips_stub.S b/psp/mips_stub.S
index 3d046d8..cc3a220 100644
--- a/psp/mips_stub.S
+++ b/psp/mips_stub.S
@@ -52,6 +52,7 @@
 .global reg
 .global spsr
 .global reg_mode
+.global oam_update
 
 # MIPS register layout:
 
@@ -116,7 +117,8 @@
 .equ CPU_HALT_STATE,      (30 * 4)
 .equ CHANGED_PC_STATUS,   (31 * 4)
 .equ COMPLETED_FRAME,     (32 * 4)
-.equ GP_SAVE,             (33 * 4)
+.equ OAM_UPDATED,         (33 * 4)
+.equ GP_SAVE,             (34 * 4)
 
 .equ SPSR_BASE,           (0x900)
 .equ REGMODE_BASE,        (0x900 + 24)
diff --git a/video.c b/video.c
index 23cd368..4221f25 100644
--- a/video.c
+++ b/video.c
@@ -4429,10 +4429,10 @@ void update_scanline(void)
 
   // If OAM has been modified since the last scanline has been updated then
   // reorder and reprofile the OBJ lists.
-  if(oam_update)
+  if(reg[OAM_UPDATED])
   {
     order_obj(video_mode);
-    oam_update = 0;
+    reg[OAM_UPDATED] = 0;
   }
 
   order_layers((dispcnt >> 8) & active_layers[video_mode]);
diff --git a/x86/x86_stub.S b/x86/x86_stub.S
index 9dd3fdd..948572c 100644
--- a/x86/x86_stub.S
+++ b/x86/x86_stub.S
@@ -28,7 +28,6 @@ _##symbol:
 
 #ifndef _WIN32
 # External symbols (data + functions)
-#define _oam_update oam_update
 #define _iwram iwram
 #define _ewram ewram
 #define _vram vram
@@ -50,7 +49,6 @@ _##symbol:
 #define _execute_store_cpsr_body execute_store_cpsr_body
 #endif
 
-.global _oam_update
 .global _iwram
 .global _ewram
 .global _vram
@@ -75,6 +73,7 @@ _##symbol:
 .equ CPU_HALT_STATE,    (30 * 4)
 .equ CHANGED_PC_STATUS, (31 * 4)
 .equ COMPLETED_FRAME,   (32 * 4)
+.equ OAM_UPDATED,       (33 * 4)
 
 # destroys ecx and edx
 
@@ -241,7 +240,7 @@ ext_store_vram8b:
   ret
 
 ext_store_oam8:
-  movl $1, _oam_update        # flag OAM update
+  movl $1, OAM_UPDATED(%ebx)  # flag OAM update
   and $0x3FE, %eax            # wrap around address and align to 16bits
   mov %dl, %dh                # copy lower 8bits of value into full 16bits
   mov %dx, _oam_ram(%eax)     # perform 16bit store
@@ -332,7 +331,7 @@ ext_store_vram16b:
   ret
 
 ext_store_oam16:
-  movl $1, _oam_update        # flag OAM update
+  movl $1, OAM_UPDATED(%ebx)  # flag OAM update
   and $0x3FF, %eax            # wrap around address
   mov %dx, _oam_ram(%eax)     # perform 16bit store
   ret
@@ -410,7 +409,7 @@ ext_store_vram32b:
   ret
 
 ext_store_oam32:
-  movl $1, _oam_update        # flag OAM update
+  movl $1, OAM_UPDATED(%ebx)  # flag OAM update
   and $0x3FF, %eax            # wrap around address
   mov %edx, _oam_ram(%eax)    # perform 32bit store
   ret