diff --git a/src/ocpu/ocpu.c b/src/ocpu/ocpu.c
index 1f4691a..6add9d2 100644
--- a/src/ocpu/ocpu.c
+++ b/src/ocpu/ocpu.c
@@ -376,7 +376,7 @@ void ocpu_execute() {
         value = match_register(reg) | ocpu_fetch_byte();
         write_register(reg, value, 0);
       } else {
-        word_value = match_register(reg) & ocpu_fetch_byte();
+        word_value = match_register(reg) | ocpu_fetch_byte();
         write_register(reg, 0, word_value);
       }
       break;
@@ -386,7 +386,27 @@ void ocpu_execute() {
         value = match_register(reg) | match_register(ocpu_fetch_byte());
         write_register(reg, value, 0);
       } else {
-        word_value = match_register(reg) & match_register(ocpu_fetch_byte());
+        word_value = match_register(reg) | match_register(ocpu_fetch_byte());
+        write_register(reg, 0, word_value);
+      }
+      break;
+    case INS_XOR_IM:
+      reg = ocpu_fetch_byte();
+      if (!is_word_reg(reg)) {
+        value = match_register(reg) ^ ocpu_fetch_byte();
+        write_register(reg, value, 0);
+      } else {
+        word_value = match_register(reg) ^ ocpu_fetch_byte();
+        write_register(reg, 0, word_value);
+      }
+      break;
+    case INS_XOR_REG:
+      reg = ocpu_fetch_byte();
+      if (!is_word_reg(reg)) {
+        value = match_register(reg) ^ match_register(ocpu_fetch_byte());
+        write_register(reg, value, 0);
+      } else {
+        word_value = match_register(reg) ^ match_register(ocpu_fetch_byte());
         write_register(reg, 0, word_value);
       }
       break;