diff --git a/lib/isr45.ppu b/lib/isr45.ppu
new file mode 100644
index 00000000..b5e2ed12
Binary files /dev/null and b/lib/isr45.ppu differ
diff --git a/src/isr/isr45.pas b/src/isr/isr45.pas
new file mode 100644
index 00000000..3c03c4fc
--- /dev/null
+++ b/src/isr/isr45.pas
@@ -0,0 +1,84 @@
+{ ************************************************
+  * Asuro
+  * Unit: Drivers/ISR45
+  * Description: Mouse ISR (IRQ12)
+  ************************************************
+  * Author: K Morris
+  * Contributors: 
+  ************************************************ }
+
+unit isr45;
+
+interface
+
+uses
+    util,
+    console,
+    isr_types,
+    IDT;
+
+procedure register();
+procedure hook(hook_method : uint32);
+procedure unhook(hook_method : uint32);
+
+implementation
+
+var
+    Hooks : Array[1..MAX_HOOKS] of pp_hook_method;
+
+procedure Main(); interrupt;
+var
+    i : integer;
+    
+begin
+    CLI;
+    console.writestringln('Mouse INT');
+    for i:=0 to MAX_HOOKS-1 do begin
+        if uint32(Hooks[i]) <> 0 then Hooks[i](void($00000000));
+    end;
+end;
+
+procedure register();
+var
+    status : uint8;
+    bm     : PBitMask;
+
+begin
+    memset(uint32(@Hooks[0]), 0, sizeof(pp_hook_method)*MAX_HOOKS);
+    IDT.set_gate(45, uint32(@Main), $08, ISR_RING_0);
+    outb($64, $20);
+    status:= inb($64);
+    bm:= PBitMask(@status);
+    bm^.b1:= true;
+    bm^.b5:= false;
+    outb($64, $60);
+    outb($60, status);
+end;
+
+procedure hook(hook_method : uint32);
+var
+    i : uint32;
+
+begin
+    for i:=0 to MAX_HOOKS-1 do begin
+        if uint32(Hooks[i]) = hook_method then exit;
+    end;
+    for i:=0 to MAX_HOOKS-1 do begin
+        if uint32(Hooks[i]) = 0 then begin
+            Hooks[i]:= pp_hook_method(hook_method);
+            exit;
+        end;
+    end;
+end;
+
+procedure unhook(hook_method : uint32);
+var
+    i : uint32;
+begin
+    for i:=0 to MAX_HOOKS-1 do begin
+        If uint32(Hooks[i]) = hook_method then Hooks[i]:= nil;
+        exit;
+    end;
+end;
+
+end.
\ No newline at end of file