From fd0bd2a1901fca162db325829b9398cd7e780c2f Mon Sep 17 00:00:00 2001
From: WlodekM <wlodzio.maly@gmail.com>
Date: Wed, 2 Apr 2025 19:25:05 +0300
Subject: another batch of instructions

---
 instructions/DEC.ts | 10 ++++++++++
 1 file changed, 10 insertions(+)
 create mode 100644 instructions/DEC.ts

(limited to 'instructions/DEC.ts')

diff --git a/instructions/DEC.ts b/instructions/DEC.ts
new file mode 100644
index 0000000..9f14487
--- /dev/null
+++ b/instructions/DEC.ts
@@ -0,0 +1,10 @@
+import type The65c02 from "../65c02.ts";
+
+export default function (this: The65c02, mode: string) {
+    const addr = this.getAddr(mode);
+    this.io.address.set(addr);
+    this.read();
+    const res = this.io.data.num() - 1;
+    this.io.data.set(res & 0xFF);
+    this.flagZN(res & 0xFF)
+}
\ No newline at end of file
-- 
cgit 1.4.1-2-gfad0