From 9771a7cbf9bebf4585dc8a3317c8722e7daf0b22 Mon Sep 17 00:00:00 2001
From: Samuel Perrouault <samuel.perrouault@gmail.com>
Date: Wed, 26 Mar 2025 14:56:05 +0100
Subject: implement SUB Vx, Vy

---
 src/chip8.rs | 5 +++++
 1 file changed, 5 insertions(+)

diff --git a/src/chip8.rs b/src/chip8.rs
index 248c302..a172fa6 100644
--- a/src/chip8.rs
+++ b/src/chip8.rs
@@ -130,6 +130,11 @@ impl Chip8 {
                     self.v[0xF] = if v > 255 { 1 } else { 0 };
                     self.v[x] = v as u8;
                 }
+                0x0005 => {
+                    eprintln!("SUB V{}, V{}", x, y);
+                    self.v[0xF] = if self.v[x] > self.v[y] { 1 } else { 0 };
+                    self.v[x] = self.v[x].wrapping_sub(self.v[y]);
+                }
                 _ => unknown_opcode(opcode),
             },
             0x9000 => {
-- 
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