Implement alternate airport on INTA

Models/Instruments/MCDU/MCDU.nas

@@ -937,7 +937,11 @@ var canvas_MCDU_base = {
 				me["INITA_FromTo"].hide();
 				me["Simple_L1"].show();
 				me["Simple_L2"].setColor(0.0901,0.6039,0.7176);
+				if (alt_airport.getValue() == "") {
 			        me["Simple_L2"].setText("NONE");
+                } else {
+                    me["Simple_L2"].setText(alt_airport.getValue());
+                }
 				me["Simple_R1"].show();
 				me["Simple_R2"].hide();
 				me["Simple_R2S"].hide();
@@ -1249,7 +1253,11 @@ var canvas_MCDU_base = {
 			} else {
 				me["Simple_L1"].setText(arrArpt.getValue());
 			}
+			if (!engrdy.getBoolValue() or alt_airport.getValue() == "") {
 				me["Simple_L2"].setText("----");
+			} else {
+				me["Simple_L2"].setText(alt_airport.getValue());
+			}
 			
 			me["Simple_L1S"].setText("AT");
 			me["Simple_L2S"].setText("X");

Nasal/FMGC/FMGC.nas

@@ -155,13 +155,19 @@ var trimReset = func {
 var updateARPT = func {
 	dep = getprop("FMGC/internal/dep-arpt");
 	arr = getprop("FMGC/internal/arr-arpt");
+	alt = getprop("FMGC/internal/alt-airport");
 	setprop("autopilot/route-manager/departure/airport", dep);
 	setprop("autopilot/route-manager/destination/airport", arr);
+	setprop("autopilot/route-manager/alternate/airport", alt);
 	if (getprop("autopilot/route-manager/active") != 1) {
 		fgcommand("activate-flightplan", props.Node.new({"activate": 1}));
 	}
 }
 
+# var updateVSPEEDS = func {
+# 
+# }
+
 setlistener("/FMGC/internal/cruise-ft", func {
 	setprop("autopilot/route-manager/cruise/altitude-ft", getprop("FMGC/internal/cruise-ft"));
 });

Nasal/MCDU/INITA.nas

@@ -1,10 +1,29 @@
 # A3XX mCDU by Joshua Davidson (Octal450), Jonathan Redpath, and Matthew Maring (hayden2000)
 
 # Copyright (c) 2019 Joshua Davidson (Octal450)
+# Copyright (c) 2020 Matthew Maring (hayden2000)
 
 var initInputA = func(key, i) {
 	var scratchpad = getprop("MCDU[" ~ i ~ "]/scratchpad");
-	if (key == "L3") {
+	if (key == "L2") {
+	    if (scratchpad == "CLR") {
+	        setprop("FMGC/internal/alt-airport", "");
+			setprop("MCDU[" ~ i ~ "]/scratchpad-msg", 0);
+			setprop("MCDU[" ~ i ~ "]/scratchpad", "");
+			fmgc.updateARPT();
+	    } else if (getprop("FMGC/internal/tofrom-set") == 1) {
+	        var tfs = size(scratchpad);
+			if (tfs == 4) {
+				setprop("FMGC/internal/alt-airport", scratchpad);
+				setprop("MCDU[" ~ i ~ "]/scratchpad", "");
+				fmgc.updateARPT();
+			} else {
+                notAllowed(i);
+            }
+	    } else {
+	        notAllowed(i);
+	    }
+	} else if (key == "L3") {
 		if (scratchpad == "CLR") {
 			setprop("MCDUC/flight-num", "");
 			setprop("MCDUC/flight-num-set", 0);

Nasal/MCDU/MCDU.nas

@@ -64,7 +64,7 @@ var MCDU_reset = func(i) {
 	setprop("FMGC/internal/extra-time", "0000");
 	
 	#FUELPRED
-	setprop("FMGC/internal/alt-airport", 0);
+	setprop("FMGC/internal/alt-airport", "");
     setprop("FMGC/internal/pri-utc", "0000");
     setprop("FMGC/internal/alt-utc", "0000");
     setprop("FMGC/internal/pri-efob", 0);
@@ -169,7 +169,7 @@ var lskbutton = func(btn, i) {
 		}
 	} else if (btn == "2") {
 		if (getprop("MCDU[" ~ i ~ "]/page") == "INITA") {
-			PerfInput("L2",i);
+			initInputA("L2",i);
 		} else if (getprop("MCDU[" ~ i ~ "]/page") == "INITB") {
 			initInputB("L2",i);
 		} else if (getprop("MCDU[" ~ i ~ "]/page") == "TO") {

Nasal/MCDU/PERFAPPR.nas

@@ -25,7 +25,7 @@ var perfAPPRInput = func(key, i) {
 	        setprop("FMGC/internal/dest-qnh", -1);
 	        setprop("MCDU[" ~ i ~ "]/scratchpad-msg", 0);
 			setprop("MCDU[" ~ i ~ "]/scratchpad", "");
-	    } else if (scratchpad >= 0 and scratchpad < 1100) {
+	    } else if (scratchpad >= 0 and scratchpad <= 1100) {
 			setprop("FMGC/internal/dest-qnh", scratchpad);
 			setprop("MCDU[" ~ i ~ "]/scratchpad", "");
 	    } else {