diff --git a/gui/input.go b/gui/input.go
index fd37b66..f2f613b 100644
--- a/gui/input.go
+++ b/gui/input.go
@@ -7,68 +7,250 @@ func (gui *GUI) char(w *glfw.Window, r rune) {
 	gui.terminal.Write([]byte(string(r)))
 }
 
+func modsPressed(pressed glfw.ModifierKey, mods ...glfw.ModifierKey) bool {
+	for _, mod := range mods {
+		if pressed&mod == 0 {
+			return false
+		}
+		pressed ^= mod
+	}
+	return pressed == 0
+}
+
 func (gui *GUI) key(w *glfw.Window, key glfw.Key, scancode int, action glfw.Action, mods glfw.ModifierKey) {
 	if action == glfw.Repeat || action == glfw.Press {
 
 		gui.logger.Debugf("KEY PRESS: key=0x%X scan=0x%X", key, scancode)
 
 		switch true {
-		case mods&glfw.ModControl > 0:
 
-			if mods&glfw.ModShift > 0 {
-				// ctrl + shift +
-				switch key {
-				case glfw.KeyV:
-					// todo handle both these errors
-					if buf, err := gui.window.GetClipboardString(); err == nil {
-						_ = gui.terminal.Write([]byte(buf))
-					}
-				case glfw.KeySemicolon:
-					gui.config.Slomo = !gui.config.Slomo
+		case modsPressed(mods, glfw.ModControl, glfw.ModShift):
+			switch key {
+			case glfw.KeyV:
+				// todo handle both these errors
+				if buf, err := gui.window.GetClipboardString(); err == nil {
+					_ = gui.terminal.Write([]byte(buf))
 				}
-			} else {
-				// ctrl +
-				switch key {
-				case glfw.KeyC: // ctrl^c
-					gui.logger.Debugf("Sending CTRL^C")
-					gui.terminal.Write([]byte{0x3}) // send EOT
+			case glfw.KeySemicolon:
+				gui.config.Slomo = !gui.config.Slomo
+			}
+		case modsPressed(mods, glfw.ModControl):
+			switch key {
+			case glfw.KeyC: // ctrl^c
+				gui.logger.Debugf("Sending CTRL^C")
+				gui.terminal.Write([]byte{0x3}) // send EOT
+			}
+		default: // no mods
+
+			switch key {
+			case glfw.KeyF1:
+				gui.terminal.Write([]byte{
+					0x1b,
+					'O',
+					'P',
+				})
+			case glfw.KeyF2:
+				gui.terminal.Write([]byte{
+					0x1b,
+					'O',
+					'Q',
+				})
+			case glfw.KeyF3:
+				gui.terminal.Write([]byte{
+					0x1b,
+					'O',
+					'R',
+				})
+			case glfw.KeyF4:
+				gui.terminal.Write([]byte{
+					0x1b,
+					'O',
+					'S',
+				})
+			case glfw.KeyF5:
+				gui.terminal.Write([]byte{
+					0x1b,
+					'[',
+					'1', '5', '~',
+				})
+			case glfw.KeyF6:
+				gui.terminal.Write([]byte{
+					0x1b,
+					'[',
+					'1', '7', '~',
+				})
+			case glfw.KeyF7:
+				gui.terminal.Write([]byte{
+					0x1b,
+					'[',
+					'1', '8', '~',
+				})
+			case glfw.KeyF8:
+				gui.terminal.Write([]byte{
+					0x1b,
+					'[',
+					'1', '9', '~',
+				})
+			case glfw.KeyF9:
+				gui.terminal.Write([]byte{
+					0x1b,
+					'[',
+					'2', '0', '~',
+				})
+			case glfw.KeyF10:
+				gui.terminal.Write([]byte{
+					0x1b,
+					'[',
+					'2', '1', '~',
+				})
+			case glfw.KeyF11:
+				gui.terminal.Write([]byte{
+					0x1b,
+					'[',
+					'2', '3', '~',
+				})
+			case glfw.KeyF12:
+				gui.terminal.Write([]byte{
+					0x1b,
+					'[',
+					'2', '4', '~',
+				})
+			case glfw.KeyInsert:
+				gui.terminal.Write([]byte{
+					0x1b,
+					'[',
+					'2', '~',
+				})
+			case glfw.KeyDelete:
+				gui.terminal.Write([]byte{
+					0x1b,
+					'[',
+					'3', '~',
+				})
+			case glfw.KeyHome:
+				if gui.terminal.IsApplicationCursorKeysModeEnabled() {
+					gui.terminal.Write([]byte{
+						0x1b,
+						'O',
+						'H',
+					})
+				} else {
+					gui.terminal.Write([]byte{
+						0x1b,
+						'[',
+						'H',
+					})
+				}
+			case glfw.KeyEnd:
+				if gui.terminal.IsApplicationCursorKeysModeEnabled() {
+					gui.terminal.Write([]byte{
+						0x1b,
+						'O',
+						'F',
+					})
+				} else {
+					gui.terminal.Write([]byte{
+						0x1b,
+						'[',
+						'F',
+					})
+				}
+			case glfw.KeyEscape:
+				if gui.terminal.IsApplicationCursorKeysModeEnabled() {
+					gui.terminal.Write([]byte{
+						0x1b,
+						'O',
+						0x1b,
+					})
+				} else {
+					gui.terminal.Write([]byte{
+						0x1b,
+						'[',
+						0x1b,
+					})
+				}
+			case glfw.KeyTab:
+				if gui.terminal.IsApplicationCursorKeysModeEnabled() {
+					gui.terminal.Write([]byte{
+						0x1b,
+						'O',
+						'I',
+					})
+				} else {
+					gui.terminal.Write([]byte{
+						0x09,
+					})
+				}
+			case glfw.KeyEnter:
+				if gui.terminal.IsApplicationCursorKeysModeEnabled() {
+					gui.terminal.Write([]byte{
+						0x1b,
+						'O',
+						'M',
+					})
+				} else {
+					gui.terminal.Write([]byte{0x0a})
+				}
+			case glfw.KeyBackspace:
+				gui.terminal.Write([]byte{0x08})
+			case glfw.KeyUp:
+				if gui.terminal.IsApplicationCursorKeysModeEnabled() {
+					gui.terminal.Write([]byte{
+						0x1b,
+						'O',
+						'A',
+					})
+				} else {
+					gui.terminal.Write([]byte{
+						0x1b,
+						'[',
+						'A',
+					})
+				}
+			case glfw.KeyDown:
+				if gui.terminal.IsApplicationCursorKeysModeEnabled() {
+					gui.terminal.Write([]byte{
+						0x1b,
+						'O',
+						'B',
+					})
+				} else {
+					gui.terminal.Write([]byte{
+						0x1b,
+						'[',
+						'B',
+					})
+				}
+			case glfw.KeyLeft:
+				if gui.terminal.IsApplicationCursorKeysModeEnabled() {
+					gui.terminal.Write([]byte{
+						0x1b,
+						'O',
+						'D',
+					})
+				} else {
+					gui.terminal.Write([]byte{
+						0x1b,
+						'[',
+						'D',
+					})
+				}
+			case glfw.KeyRight:
+				if gui.terminal.IsApplicationCursorKeysModeEnabled() {
+					gui.terminal.Write([]byte{
+						0x1b,
+						'O',
+						'C',
+					})
+				} else {
+					gui.terminal.Write([]byte{
+						0x1b,
+						'[',
+						'C',
+					})
 				}
 			}
-		}
 
-		switch key {
-		case glfw.KeyEnter:
-			gui.terminal.Write([]byte{0x0a})
-		case glfw.KeyBackspace:
-			gui.terminal.Write([]byte{0x08})
-		case glfw.KeyUp:
-			gui.terminal.Write([]byte{
-				0x1b,
-				'[',
-				'A',
-			})
-		case glfw.KeyDown:
-			gui.terminal.Write([]byte{
-				0x1b,
-				'[',
-				'B',
-			})
-		case glfw.KeyLeft:
-			gui.terminal.Write([]byte{
-				0x1b,
-				'[',
-				'D',
-			})
-		case glfw.KeyRight:
-			gui.terminal.Write([]byte{
-				0x1b,
-				'[',
-				'C',
-			})
-		case glfw.KeyTab:
-			gui.terminal.Write([]byte{
-				0x09,
-			})
 		}
 
 		//gui.logger.Debugf("Key pressed: 0x%X %q", key, string([]byte{byte(key)}))
diff --git a/terminal/output.go b/terminal/output.go
index 0f4faf7..ba79ec6 100644
--- a/terminal/output.go
+++ b/terminal/output.go
@@ -41,7 +41,7 @@ func (terminal *Terminal) processInput(ctx context.Context, pty chan rune) {
 
 		if ok {
 			if err := handler(pty, terminal); err != nil {
-				terminal.logger.Errorf("Error handling escape sequence 0x%X: %s", b, err)
+				terminal.logger.Errorf("Error handling escape sequence: %s", err)
 			}
 			continue
 		}
@@ -49,18 +49,22 @@ func (terminal *Terminal) processInput(ctx context.Context, pty chan rune) {
 		terminal.logger.Debugf("Received character 0x%X: %q", b, string(b))
 
 		switch b {
-		case 0x0a:
+		case 0x0a, 0x0c, 0x0b: // LF, FF, VT
 			terminal.ActiveBuffer().NewLine()
-		case 0x0d:
+		case 0x0d: // CR
 			terminal.ActiveBuffer().CarriageReturn()
-		case 0x08:
+		case 0x08: // BS
 			// backspace
 			terminal.ActiveBuffer().Backspace()
-		case 0x07:
+		case 0x07: // BEL
 			// @todo ring bell - flash red or some shit?
+		case 0x05: // ENQ
+			terminal.logger.Errorf("Received ENQ!")
+		case 0xe, 0xf:
+			terminal.logger.Errorf("Received SI/SO")
+		case 0x09:
+			terminal.logger.Errorf("Received TAB")
 		default:
-			// render character at current location
-			//		fmt.Printf("%s\n", string([]byte{b}))
 			if b >= 0x20 {
 				terminal.ActiveBuffer().Write(b)
 			} else {
diff --git a/terminal/terminal.go b/terminal/terminal.go
index 4410eac..a5f5fca 100644
--- a/terminal/terminal.go
+++ b/terminal/terminal.go
@@ -90,6 +90,10 @@ func New(pty *os.File, logger *zap.SugaredLogger, config *config.Config) *Termin
 	}
 }
 
+func (terminal *Terminal) IsApplicationCursorKeysModeEnabled() bool {
+	return terminal.modes.ApplicationCursorKeys
+}
+
 func (terminal *Terminal) SetMouseMode(mode MouseMode) {
 	terminal.mouseMode = mode
 }