Finished CPU instructions and created ui window.

lib/cpu.c

@@ -2,6 +2,7 @@
 #include <bus.h>
 #include <common.h>
 #include <emu.h>
+#include <interrupts.h>
 
 cpu_context ctx = {0};
 
@@ -44,6 +45,22 @@ bool cpu_step() {
             exit(-7);
         }
         execute();
+    } else {
+        //is halted
+        emu_cycles(1);
+
+        if(ctx.int_flags) {
+            ctx.halted = false;
+        }
+    }
+
+    if(ctx.int_master_enabled) {
+        cpu_handle_interrupts(&ctx);
+        ctx.enabling_ime = false;
+    }
+
+    if(ctx.enabling_ime) {
+        ctx.int_master_enabled = true;
     }
 
     return true;