diff --git a/chip8/chip8.go b/chip8/chip8.go
index d8e8223..f5fcd2f 100644
--- a/chip8/chip8.go
+++ b/chip8/chip8.go
@@ -129,7 +129,9 @@ func (emulator *Emulator) Cycle() {
 	case 0xE:
 		switch instruction & 0x00FF {
 		case 0x9E: // SKP Vx
+			emulator.SkipKeyPressed(x)
 		case 0xA1: // SKNP Vx
+			emulator.SkipKeyNotPressed(x)
 		}
 	case 0xF:
 		switch instruction & 0x00FF {
diff --git a/chip8/instructions.go b/chip8/instructions.go
index 500a9fe..269a9d7 100644
--- a/chip8/instructions.go
+++ b/chip8/instructions.go
@@ -227,3 +227,19 @@ func (emulator *Emulator) Draw(x uint8, y uint8, n uint8) {
 		}
 	}
 }
+
+// Skip next instruction if key with the value of Vx is pressed.
+//
+// Checks the keyboard, and if the key corresponding to the value of Vx
+// is currently in the down position, PC is increased by 2.
+func (emulator *Emulator) SkipKeyPressed(x uint8) {
+	// TODO: implement input
+}
+
+// Skip next instruction if key with the value of Vx is not pressed.
+//
+// Checks the keyboard, and if the key corresponding to the value of Vx
+// is currently in the up position, PC is increased by 2.
+func (emulator *Emulator) SkipKeyNotPressed(x uint8) {
+	// TODO: implement input
+}