implement save file decryption/encryption

test-decode-vms.sh

@@ -0,0 +1,18 @@
+#!/bin/sh
+
+set -e
+
+EXECUTABLE="$1"
+if [ "$EXECUTABLE" == "" ]; then
+  EXECUTABLE="./newserv"
+fi
+
+echo "... decode LionelV1.vms"
+$EXECUTABLE decode-vms tests/LionelV1.vms
+diff tests/LionelV1.dec tests/LionelV1.vms.dec
+echo "... decode LionelV2.vms"
+$EXECUTABLE decode-vms tests/LionelV2.vms --seed=D0231610
+diff tests/LionelV2.dec tests/LionelV2.vms.dec
+
+echo "... clean up"
+rm tests/*.vms.dec