1 files changed, 8 insertions, 0 deletions
diff --git a/src/main/kotlin/cpu/Registers.kt b/src/main/kotlin/cpu/Registers.kt
index 54539a8..81db1b0 100644
--- a/src/main/kotlin/cpu/Registers.kt
+++ b/src/main/kotlin/cpu/Registers.kt
@@ -131,6 +131,14 @@ class Registers {
     return currentSP
   }
 
+  fun addSignedByteToPC(byte: Int) {
+    PC = if (bm.isSignedByteNegative(byte)) {
+      (PC - bm.getAbsoluteValue(byte)) and 0xFFFF
+    } else {
+      (PC + bm.getAbsoluteValue(byte)) and 0xFFFF
+    }
+  }
+
   fun getFlag(flag: Flag): Int {
     return (F shr flag.bitPosition) and 0x01
   }