Only DJNZ has the extra tick (presumably to decrement the B register)

2026-03-11 05:41:49 +00:00 · 2025-05-02 14:07:15 +01:00
parent 935466ad6f
commit fda52af260
1 changed files with 1 additions and 1 deletions
--- a/Z80/Z80.cs
+++ b/Z80/Z80.cs
@@ -558,7 +558,6 @@ namespace Z80

        protected override bool JumpRelativeConditional(bool condition)
        {
-            this.Tick();
            var offset = this.FetchByte();
            if (condition)
            {
@@ -1156,6 +1155,7 @@ namespace Z80
                                    this.ExxAF();
                                    break;
                                case 2: // DJNZ d
+                                    this.Tick();
                                    _ = this.JumpRelativeConditional(--this.B != 0);
                                    break;
                                case 3: // JR d