5 ZEXALL tests now complete. Going to implement ALL remaining OpCOdes

2026-04-23 16:51:21 +01:00
parent 112b6d15fe
commit 5892f7e491
4 changed files with 3532 additions and 1373 deletions
--- a/Desktop/DebuggerForm.cs
+++ b/Desktop/DebuggerForm.cs
@@ -1241,6 +1241,17 @@ namespace Desktop
                                mnemonic = $"LD A, (IY{sign}{d})";
                                instructionLength = 3;
                            }
+                            else if (fdOpcode == 0x84) // ADD A, IYH
+                            {
+
+                                mnemonic = $"ADD A, IYH";
+                                instructionLength = 2;
+                            }
+                            else if (fdOpcode == 0x85) // ADD A, IYL
+                            {
+                                mnemonic = $"ADD A, IYL";
+                                instructionLength = 2;
+                            }
                            else if (fdOpcode == 0x86) // ADD A, (IY+d)
                            {
                                sbyte dAdd = (sbyte)_memoryBus.Read((ushort)(currentPc + 2));