diff --git a/assets/tbas/basic.js b/assets/tbas/basic.js
index c90c2bb..fe6df17 100644
--- a/assets/tbas/basic.js
+++ b/assets/tbas/basic.js
@@ -317,8 +317,7 @@ basicInterpreterStatus.builtin = {
                 if (seps[llll - 1] == ",") print("\t");
             }
 
-            var resolvedargs = resolve(args[llll]);
-            if (resolvedargs === undefined) resolvedargs = "";
+            var resolvedargs = resolve(args[llll]) || "";
 
             if (args[llll].type == "number")
                 print(" "+resolvedargs+" ");
diff --git a/assets/tvdos/TVDOS.SYS b/assets/tvdos/TVDOS.SYS
index a551f3b..11f6b78 100644
--- a/assets/tvdos/TVDOS.SYS
+++ b/assets/tvdos/TVDOS.SYS
@@ -27,6 +27,9 @@ Object.freeze(_TVDOS);
 
 var filesystem = {};
 filesystem._toPorts = function(driveLetter) {
+    if (driveLetter.toUpperCase === undefined) {
+        throw Error("'"+driveLetter+"' (type: "+typeof driveLetter+") is not a valid drive letter");
+    }
     let port = _TVDOS.DRIVES[driveLetter.toUpperCase()];
     if (port === undefined) {
         throw Error("Drive letter '" + driveLetter.toUpperCase() + "' does not exist");
@@ -76,9 +79,8 @@ filesystem.isDirectory = function(driveLetter) {
     let port = filesystem._toPorts(driveLetter);
     com.sendMessage(port[0], "LISTFILES");
     let response = com.getStatusCode(port[0]);
-
     return (response === 0);
-}
+};
 filesystem.mkDir = function(driveLetter) {
     let port = filesystem._toPorts(driveLetter);
     com.sendMessage(port[0], "MKDIR");
@@ -89,7 +91,19 @@ filesystem.mkDir = function(driveLetter) {
         throw Error("Creating a directory failed with ("+response+"): "+status.message+"\n");
     }
     return (response === 0); // possible status codes: 0 (success), 1 (fail)
-}
+};
+filesystem.touch = function(driveLetter) {
+    let port = filesystem._toPorts(driveLetter);
+    com.sendMessage(port[0], "TOUCH");
+    let response = com.getStatusCode(port[0]);
+    return (response === 0);
+};
+filesystem.mkFile = function(driveLetter) {
+    let port = filesystem._toPorts(driveLetter);
+    com.sendMessage(port[0], "MKFILE");
+    let response = com.getStatusCode(port[0]);
+    return (response === 0);
+};
 Object.freeze(filesystem);
 
 ///////////////////////////////////////////////////////////////////////////////
@@ -110,6 +124,7 @@ var execApp = function(cmdsrc, args) {
 
 // Boot script
 serial.println("TVDOS.SYS initialised, running boot script...");
+var _G = {};
 filesystem.open("A", "tvdos/bin/command.js", "R");
 let cmdsrc = filesystem.readAll("A");
 execApp(cmdsrc, ["", "/c", "\\AUTOEXEC.BAT"]);
diff --git a/assets/tvdos/bin/command.js b/assets/tvdos/bin/command.js
index 0c5b604..e3c7070 100644
--- a/assets/tvdos/bin/command.js
+++ b/assets/tvdos/bin/command.js
@@ -52,6 +52,8 @@ function trimStartRevSlash(s) {
 }
 
 let shell = {};
+shell.getPwd = function() { return shell_pwd; }
+shell.getCurrentDrive = function() { return CURRENT_DRIVE; }
 // example input: echo "the string" > subdir\test.txt
 shell.parse = function(input) {
     let tokens = [];
@@ -122,8 +124,7 @@ shell.parse = function(input) {
 
     return tokens;
 }
-
-function resolvePathInput(input) {
+shell.resolvePathInput = function(input) {
     // replace slashes into revslashes
     let pathstr = input.replaceAll('/','\\\\');
     let startsWithSlash = input.startsWith('\\');
@@ -166,7 +167,7 @@ shell.coreutils = {
             println(CURRENT_DRIVE+":"+shell_pwd.join("\\"));
             return
         }
-        let path = resolvePathInput(args[1])
+        let path = shell.resolvePathInput(args[1])
         if (DEBUG_PRINT) serial.println("command.js > cd > pathstr = "+path.string);
 
         // check if path is valid
@@ -181,7 +182,7 @@ shell.coreutils = {
             printerrln("Syntax error");
             return
         }
-        let path = resolvePathInput(args[1])
+        let path = shell.resolvePathInput(args[1])
         if (DEBUG_PRINT) serial.println("command.js > mkdir > pathstr = "+path.string);
 
         // check if path is valid
@@ -320,6 +321,7 @@ shell.execute = function(line) {
     }
 };
 Object.freeze(shell);
+_G.shell = shell;
 
 
 ///////////////////////////////////////////////////////////////////////////////////////////////////////////////////////
diff --git a/assets/tvdos/bin/touch.js b/assets/tvdos/bin/touch.js
new file mode 100644
index 0000000..3081a8a
--- /dev/null
+++ b/assets/tvdos/bin/touch.js
@@ -0,0 +1,30 @@
+if (exec_args[1] === undefined) {
+    println("TOUCH - TVDOS file date and time setting utility");
+    println()
+    println("SYNOPSIS")
+    println("    TOUCH [/C] path")
+    println()
+    println("/C   = don't create files that do not already exist")
+    return 1;
+}
+
+let path = _G.shell.resolvePathInput(exec_args[2] || exec_args[1]).string;
+let driveLetter = _G.shell.getCurrentDrive();
+let noNewFile = (exec_args[1] == "/c" || exec_args[1] == "/C");
+let fileOpened = filesystem.open(driveLetter, path, "W");
+if (!fileOpened) {
+    printerrln("TOUCH: Can't open "+driveLetter+":\\"+path+" due to IO error");
+    return 1;
+}
+
+if (!noNewFile) {
+    filesystem.mkFile(driveLetter);
+}
+
+let touched = filesystem.touch(driveLetter);
+if (!touched) {
+    printerrln("TOUCH: Can't touch "+driveLetter+":\\"+path+" due to IO error");
+    return 1;
+}
+
+return 0;
\ No newline at end of file
diff --git a/src/net/torvald/tsvm/peripheral/IOSpace.kt b/src/net/torvald/tsvm/peripheral/IOSpace.kt
index b3bda14..3cf0d81 100644
--- a/src/net/torvald/tsvm/peripheral/IOSpace.kt
+++ b/src/net/torvald/tsvm/peripheral/IOSpace.kt
@@ -40,7 +40,7 @@ class IOSpace(val vm: VM) : PeriBase, InputProcessor {
 
     init {
         blockTransferPorts[1].attachDevice(TestFunctionGenerator())
-        blockTransferPorts[0].attachDevice(TestDiskDrive(0, File("assets/")))
+        blockTransferPorts[0].attachDevice(TestDiskDrive(vm, 0, File("assets/")))
     }
 
     private fun composeBlockTransferStatus(portno: Int): Int {
diff --git a/src/net/torvald/tsvm/peripheral/TestDiskDrive.kt b/src/net/torvald/tsvm/peripheral/TestDiskDrive.kt
index 3b477c5..929ad4f 100644
--- a/src/net/torvald/tsvm/peripheral/TestDiskDrive.kt
+++ b/src/net/torvald/tsvm/peripheral/TestDiskDrive.kt
@@ -1,13 +1,14 @@
 package net.torvald.tsvm.peripheral
 
 import net.torvald.tsvm.VM
+import net.torvald.tsvm.VMJSR223Delegate
 import java.io.ByteArrayOutputStream
 import java.io.File
 import java.io.FileInputStream
 import java.io.IOException
 import java.util.*
 
-class TestDiskDrive(private val driveNum: Int, theRootPath: File? = null) : BlockTransferInterface(false, true) {
+class TestDiskDrive(private val vm: VM, private val driveNum: Int, theRootPath: File? = null) : BlockTransferInterface(false, true) {
 
     companion object {
         const val STATE_CODE_STANDBY = 0
@@ -306,7 +307,7 @@ class TestDiskDrive(private val driveNum: Int, theRootPath: File? = null) : Bloc
             }
             else if (inputString.startsWith("MKDIR")) {
                 if (!fileOpen) {
-                    statusCode = STATE_CODE_FILE_NOT_FOUND
+                    statusCode = STATE_CODE_NO_FILE_OPENED
                     return
                 }
                 if (fileOpenMode < 1) {
@@ -321,9 +322,51 @@ class TestDiskDrive(private val driveNum: Int, theRootPath: File? = null) : Bloc
                     statusCode = STATE_CODE_SYSTEM_SECURITY_ERROR
                 }
             }
+            else if (inputString.startsWith("MKFILE")) {
+                if (!fileOpen) {
+                    statusCode = STATE_CODE_NO_FILE_OPENED
+                    return
+                }
+                if (fileOpenMode < 1) {
+                    statusCode = STATE_CODE_OPERATION_NOT_PERMITTED
+                    return
+                }
+                try {
+                    val f1 = file.createNewFile()
+                    statusCode = if (f1) STATE_CODE_STANDBY else STATE_CODE_OPERATION_FAILED
+                    return
+                }
+                catch (e: IOException) {
+                    statusCode = STATE_CODE_SYSTEM_IO_ERROR
+                }
+                catch (e1: SecurityException) {
+                    statusCode = STATE_CODE_SYSTEM_SECURITY_ERROR
+                }
+            }
+            else if (inputString.startsWith("TOUCH")) {
+                if (!fileOpen) {
+                    statusCode = STATE_CODE_NO_FILE_OPENED
+                    return
+                }
+                if (fileOpenMode < 1) {
+                    statusCode = STATE_CODE_OPERATION_NOT_PERMITTED
+                    return
+                }
+                try {
+                    val f1 = file.setLastModified(vm.worldInterface.currentTimeInMills())
+                    statusCode = if (f1) STATE_CODE_STANDBY else STATE_CODE_OPERATION_FAILED
+                    return
+                }
+                catch (e: IOException) {
+                    statusCode = STATE_CODE_SYSTEM_IO_ERROR
+                }
+                catch (e1: SecurityException) {
+                    statusCode = STATE_CODE_SYSTEM_SECURITY_ERROR
+                }
+            }
             else if (inputString.startsWith("WRITE")) {
                 if (!fileOpen) {
-                    statusCode = STATE_CODE_FILE_NOT_FOUND
+                    statusCode = STATE_CODE_NO_FILE_OPENED
                     return
                 }
                 if (fileOpenMode < 0) {