1 files changed, 2 insertions, 0 deletions
diff --git a/src/cpu.c b/src/cpu.c
index 9e7f685..5b73724 100644
--- a/src/cpu.c
+++ b/src/cpu.c
@@ -407,6 +407,8 @@ int cpu_step(GB *gb) {
 
     case 0xCB: do_cb(gb); break;
 
+    case 0xED: gb->poweroff = true; break;  // (illegal on HW) clean-exit signal
+
     default:
         // 0x40-0xBF block: LD r,r' and ALU A,r
         if (op >= 0x40 && op < 0x80) {