implement SKP Vx and SKNP Vx

1 files changed, 15 insertions, 0 deletions

diff --git a/src/lib.rs b/src/lib.rs
index 36bbbf3..517644e 100644
--- a/src/lib.rs
+++ b/src/lib.rs
@@ -208,6 +208,21 @@ impl Chip8 {
                 }
                 self.draw = true;
             }
+            0xE000 => match opcode & 0x00FF {
+                0x009E => {
+                    eprintln!("SKP V{}", x);
+                    if self.key[self.v[x] as usize] == 1 {
+                        self.pc += 2;
+                    }
+                }
+                0x00A1 => {
+                    eprintln!("SKNP V{}", x);
+                    if self.key[self.v[x] as usize] == 0 {
+                        self.pc += 2;
+                    }
+                }
+                _ => unknown_opcode(opcode),
+            },
             0xF000 => match opcode & 0x00FF {
                 0x0015 => {
                     eprintln!("LD DT, V{}", x);