diff --git a/lib/read.cs.js b/lib/read.cs.js
index cf1b2cd..c7bff07 100644
--- a/lib/read.cs.js
+++ b/lib/read.cs.js
@@ -2,43 +2,67 @@
 
 var
   FSO_ForReading = 1, FSO_ForWriting = 2,
+  PS_MSG = 'Microsoft Windows PowerShell is required.\n' +
+    'https://technet.microsoft.com/en-us/library/hh847837.aspx',
 
-  fso, tty,
-  args =// Array.prototype.slice.call(WScript.Arguments),
-    (function() {
-      var args = [], i, iLen;
-      for (i = 0, iLen = WScript.Arguments.length; i < iLen; i++)
-        { args.push(WScript.Arguments(i)); }
-      return args;
-    })(),
-  arg, options = {};
+  input, fso, tty,
+  options = (function(conf) {
+    var options = {}, arg, args =// Array.prototype.slice.call(WScript.Arguments),
+      (function() {
+        var args = [], i, iLen;
+        for (i = 0, iLen = WScript.Arguments.length; i < iLen; i++)
+          { args.push(WScript.Arguments(i)); }
+        return args;
+      })(),
+      confLc = {}, key;
 
-while (typeof(arg = args.shift()) === 'string') {
-  arg = arg.toLowerCase();
-  if (arg === '--display') {
-    options.display = args.shift();
-  } else if (arg === '--noechoback') {
-    options.noEchoBack = true;
-  } else if (arg === '--mask') {
-    options.mask = args.shift();
-  } else if (arg === '--keyin') {
-    options.keyIn = true;
-  } else if (arg === '--encoded') {
-    options.encoded = true;
-  }
+    function decodeDOS(arg) {
+      return arg.replace(/#(\d+);/g, function(str, charCode) {
+        return String.fromCharCode(+charCode);
+      });
+    }
+
+    for (key in conf) {
+      if (conf.hasOwnProperty(key))
+        { confLc[key.toLowerCase()] = {key: key, type: conf[key]}; }
+    }
+
+    while (typeof(arg = args.shift()) === 'string') {
+      if (!(arg = (arg.match(/^\-+(.+)$/) || [])[1])) { continue; }
+      arg = arg.toLowerCase();
+      if (confLc[arg]) {
+        options[confLc[arg].key] =
+          confLc[arg].type === 'boolean' ? true :
+          confLc[arg].type === 'string' ? args.shift() : null;
+      }
+    }
+    for (key in conf) {
+      if (conf.hasOwnProperty(key) && conf[key] === 'string') {
+        if (typeof options[key] !== 'string') { options[key] = ''; }
+        else if (options.encoded) { options[key] = decodeDOS(options[key]); }
+      }
+    }
+    return options;
+  })({
+    display:      'string',
+    noEchoBack:   'boolean',
+    mask:         'string',
+    keyIn:        'boolean',
+    encoded:      'boolean'
+  });
+
+if (!options.noEchoBack && !options.keyIn) {
+  if (options.display !== '') { writeTTY(options.display); }
+  input = readByCS();
+} else if (options.noEchoBack && !options.keyIn && options.mask === '*') {
+  if (options.display !== '') { writeTTY(options.display); }
+  input = readByPW();
+} else {
+  WScript.StdErr.WriteLine(PS_MSG);
+  WScript.Quit(1);
 }
 
-if (options.encoded) {
-  if (typeof options.display === 'string')
-    { options.display = decodeDOS(options.display); }
-  if (typeof options.mask === 'string')
-    { options.mask = decodeDOS(options.mask); }
-}
-
-if (typeof options.display === 'string' && options.display !== '')
-  { writeTTY(options.display); }
-
-WScript.StdOut.Write("'" + readTTY() + "'");
+WScript.StdOut.Write('\'' + input + '\'');
 
 WScript.Quit();
 
@@ -48,50 +72,28 @@ function writeTTY(text) {
     tty.Write(text);
   } catch (e) {
     WScript.StdErr.WriteLine('TTY Write Error: ' + e.number +
-      '\n' + e.description);
-    WScript.Quit(1);
-  }
-}
-
-function readTTY() {
-
-  // function psExists() {
-  //   var envPs = getShell().Environment('System')('PSModulePath');
-  //   return typeof envPs === 'string' && envPs !== '';
-  // }
-
-  if (!options.noEchoBack && !options.keyIn) {
-    return readByCS();
-  // } else if (psExists()) {
-  //   return readByPS();
-  } else if (options.noEchoBack && !options.keyIn && options.mask === '*') {
-    return readByPW();
-  } else {
-    WScript.StdErr.WriteLine('Microsoft Windows PowerShell is required.\n' +
-      'https://technet.microsoft.com/ja-jp/library/hh847837.aspx');
+      '\n' + e.description + '\n' + PS_MSG);
     WScript.Quit(1);
   }
 }
 
 function readByCS() {
-  WScript.StdErr.Write('<<readByCS>>'); //_DBG_
   var text;
   try {
     text = getFso().OpenTextFile('CONIN$', FSO_ForReading).ReadLine();
   } catch (e) {
     WScript.StdErr.WriteLine('TTY Read Error: ' + e.number +
-      '\n' + e.description);
+      '\n' + e.description + '\n' + PS_MSG);
     WScript.Quit(1);
   }
   return text;
 }
 
+// TTY must be STDIN that is not redirected and not piped.
 function readByPW() {
-  WScript.StdErr.Write('<<readByPW>>'); //_DBG_
-  var pw;
-  // exit-code is not returned even if an error is thrown.
+  var text;
   try {
-    pw = WScript.CreateObject('ScriptPW.Password').GetPassword()
+    text = WScript.CreateObject('ScriptPW.Password').GetPassword()
       // Bug? Illegal data may be returned when user types before initializing.
       .replace(/[\u4000-\u40FF]/g, function(chr) {
         var charCode = chr.charCodeAt(0);
@@ -100,21 +102,14 @@ function readByPW() {
       });
   } catch (e) {
     WScript.StdErr.WriteLine('ScriptPW.Password Error: ' + e.number +
-      '\n' + e.description);
+      '\n' + e.description + '\n' + PS_MSG);
     WScript.Quit(1);
   }
   writeTTY('\n');
-  return pw;
+  return text;
 }
 
 function getFso() {
   if (!fso) { fso = new ActiveXObject('Scripting.FileSystemObject'); }
   return fso;
 }
-
-function decodeDOS(arg) {
-  return arg.replace(/#(\d+);/g, function(str, charCode) {
-    return String.fromCharCode(+charCode);
-  });
-}
-
diff --git a/lib/read.ps1 b/lib/read.ps1
index c281dd2..09babe8 100644
--- a/lib/read.ps1
+++ b/lib/read.ps1
@@ -2,7 +2,7 @@
 Param(
   [string] $display,
   [switch] $noEchoBack,
-  [string] $mask = '*',
+  [string] $mask,
   [switch] $keyIn,
   [switch] $encoded
 )
@@ -14,24 +14,35 @@ trap {
   exit 1
 }
 
-function decodeDOS($arg) {
+function decodeDOS ($arg) {
   [Regex]::Replace($arg, '#(\d+);', { [char][int] $args[0].Groups[1].Value })
 }
 
-if ($encoded) {
-  if ($display -ne '') { $display = decodeDOS $display }
-  if ($mask -ne '') { $mask = decodeDOS $mask }
+$options = @{}
+foreach ($arg in @('display', 'noEchoBack', 'mask', 'keyIn', 'encoded')) {
+  $options.Add($arg, (Get-Variable $arg -ValueOnly))
+}
+if ($options.encoded) {
+  $argList = New-Object string[] $options.Keys.Count
+  $options.Keys.CopyTo($argList, 0);
+  foreach ($arg in $argList) {
+    if (($options[$arg] -is [string]) -and ($options[$arg] -ne ''))
+      { $options[$arg] = decodeDOS $options[$arg] }
+  }
 }
 
-Write-Warning "[PS] display:     <$display>" #_DBG
-Write-Warning "[PS] noEchoBack:  $noEchoBack" #_DBG
-Write-Warning "[PS] mask:        <$mask>" #_DBG
-Write-Warning "[PS] keyIn:       $keyIn" #_DBG
+[string] $inputTTY = ''
+[bool] $isInputLine = $False
+[bool] $isEditable = (-not $options.noEchoBack) -and (-not $options.keyIn)
+
+function writeTTY ($text) {
+  execWithTTY ('Write-Host ''' + ($text -replace '''', '''''') + ''' -NoNewline')
+  $script:isInputLine = $True
+}
 
 # Instant method that opens TTY without CreateFile via P/Invoke in .NET Framework
-# **NOTE** Don't include special characters in $command when $getRes is True.
+# **NOTE** Don't include special characters of DOS in $command when $getRes is True.
 function execWithTTY ($command, $getRes = $False) {
-  Write-Warning "[PS] command: <$command> getRes: $getRes" #_DBG
   if ($getRes) {
     $res = (cmd.exe /C "<CON powershell.exe -Command $command")
     if ($LastExitCode -ne 0) { exit 1 }
@@ -43,21 +54,19 @@ function execWithTTY ($command, $getRes = $False) {
   return $res
 }
 
-function writeTTY ($text) {
-  execWithTTY ('Write-Host ''' + ($text -replace '''', '''''') + ''' -NoNewline')
+if ($options.display -ne '') {
+  writeTTY $options.display
+  $options.display = ''
 }
 
-[string] $inputTTY = ''
-
-if ($noEchoBack -and (-not $keyIn) -and ($mask -eq '*')) {
+if ($options.noEchoBack -and (-not $options.keyIn) -and ($options.mask -eq '*')) {
   $inputTTY = execWithTTY ('$inputTTY = Read-Host -AsSecureString;' +
     '$bstr = [System.Runtime.InteropServices.Marshal]::SecureStringToBSTR($inputTTY);' +
     '[System.Runtime.InteropServices.Marshal]::PtrToStringAuto($bstr)') $True
-  return $inputTTY
+  return '''' + $inputTTY + ''''
 }
 
-$isEditable = (-not $noEchoBack) -and (-not $keyIn)
-if ($keyIn) { $reqSize = 1 }
+if ($options.keyIn) { $reqSize = 1 }
 else { $reqSize = 1024 } # dummy
 
 while ($True) {
@@ -69,25 +78,27 @@ while ($True) {
   }
 
   if ($chunk -eq '') { break }
+  # other ctrl-chars
   $chunk = $chunk -replace '[\x00-\x08\x0b\x0c\x0e-\x1f\x7f]', ''
   if ($chunk -eq '') { continue }
 
   if (-not $isEditable) {
-    $displayInput = $chunk -replace '[\r\n]', ''
-    if ($displayInput -ne '') {
-      if ($noEchoBack) {
-        if ($mask -eq '') { $displayInput = '' }
-        else { $displayInput = $displayInput -replace '.', $mask }
+    $displayTmp = $chunk -replace '[\r\n]', ''
+    if ($displayTmp -ne '') {
+      if ($options.noEchoBack) {
+        if ($options.mask -eq '') { $displayTmp = '' }
+        else { $displayTmp = $options.mask * $displayTmp.Length }
       }
-      if ($displayInput -ne '') { writeTTY $displayInput }
+      if ($displayTmp -ne '') { writeTTY $displayTmp }
     }
   }
 
   $inputTTY += $chunk
-  if (($inputTTY -match '[\r\n]$') -or ($keyIn -and ($inputTTY.Length -ge $reqSize)))
-    { break }
+  if (($inputTTY -match '[\r\n]$') -or
+    ($options.keyIn -and ($inputTTY.Length -ge $reqSize))) { break }
 }
 
-if (-not $isEditable) { writeTTY "`n" } # new-line
+if ((-not $isEditable) -and (-not ($options.keyIn -and (-not $isInputLine))))
+  { execWithTTY 'Write-Host ''''' } # new line
 
-return '''' + $inputTTY + '''' #DBG
+return '''' + $inputTTY + ''''
diff --git a/lib/readline-sync.js b/lib/readline-sync.js
index 1526020..a7d7084 100644
--- a/lib/readline-sync.js
+++ b/lib/readline-sync.js
@@ -27,9 +27,16 @@ var
   useExt = false,
 
   fdR = 'none', fdW, ttyR, isRawMode = false,
-  extHostPath, extScriptPath, tempdir, salt = 0;
+  extHostPath, extHostArgs, tempdir, salt = 0;
 
-function readlineSync(options) { // display, mask are string
+/*
+  display:        string
+  noEchoBack:     boolean
+  mask:           string
+  keyIn:          boolean
+  noTrim:         boolean
+*/
+function readlineSync(options) {
   var input = '', displayTmp;
 
   function tryExt() {
@@ -187,48 +194,45 @@ function readlineSync(options) { // display, mask are string
 }
 
 function readlineExt(options) {
-  var cmdArgs = [], execArgs, res = {},
-    execOptions = {
-      env: process.env,
-      // ScriptPW (Win XP and Server2003) needs TTY stream as STDIN.
-      // In this case, If STDIN isn't TTY, an error is thrown.
-      stdio: [process.stdin],
-      encoding: encoding
-    };
+  var hostArgs, res = {},
+    execOptions = {env: process.env, encoding: encoding};
 
-  extHostPath = extHostPath || (IS_WIN ? 'cscript.exe' : '/bin/sh');
-  extScriptPath = extScriptPath || (__dirname + (IS_WIN ? '\\read.cs.js' : '/read.sh'));
-
-  // To send any text to crazy Windows shell safely.
-  function encodeDOS(arg) {
-    return arg.replace(/[^\w\u0080-\uFFFF]/g, function(chr) {
-      return '#' + chr.charCodeAt(0) + ';';
-    });
+  if (!extHostPath) {
+    if (IS_WIN) {
+      if (process.env.PSModulePath) { // Windows PowerShell
+        extHostPath = 'powershell.exe';
+        extHostArgs = ['-ExecutionPolicy', 'Bypass', '-File', __dirname + '\\read.ps1'];
+      } else {                        // Windows Script Host
+        extHostPath = 'cscript.exe';
+        extHostArgs = ['//nologo', __dirname + '\\read.cs.js'];
+      }
+    } else {
+      extHostPath = '/bin/sh';
+      extHostArgs = [__dirname + '/read.sh'];
+    }
   }
-
-  if (options.noEchoBack) { cmdArgs.push('--noechoback'); }
-  if (options.keyIn) { cmdArgs.push('--keyin'); }
-  if (options.display !== '') {
-    cmdArgs = cmdArgs.concat('--display', IS_WIN ?
-      [encodeDOS(options.display), '--encoded'] : options.display);
+  if (IS_WIN && !process.env.PSModulePath) { // Windows Script Host
+    // ScriptPW (Win XP and Server2003) needs TTY stream as STDIN.
+    // In this case, If STDIN isn't TTY, an error is thrown.
+    execOptions.stdio = [process.stdin];
   }
 
   if (childProc.execFileSync) {
-    execArgs = (IS_WIN ? ['//nologo', extScriptPath] : [extScriptPath]).concat(cmdArgs);
+    hostArgs = getHostArgs(options);
     try {
-      res.input = childProc.execFileSync(extHostPath, execArgs, execOptions);
+      res.input = childProc.execFileSync(extHostPath, hostArgs, execOptions);
     } catch (e) { // non-zero exit code
       res.error = new Error(DEFAULT_ERR_MSG);
       res.error.method = 'execFileSync';
-      res.error.command = extScriptPath;
-      res.error.args = cmdArgs;
-      res.error.ExtMessage = e.stderr.trim();
+      res.error.program = extHostPath;
+      res.error.args = hostArgs;
+      res.error.extMessage = e.stderr.trim();
+      res.error.exitCode = e.status;
       res.error.code = e.code;
       res.error.signal = e.signal;
-      res.error.exitCode = e.status;
     }
   } else {
-    res = _execFileSync(cmdArgs, execOptions);
+    res = _execFileSync(options, execOptions);
   }
   if (!res.error) {
     res.input = res.input.replace(/^'|'$/g, '');
@@ -239,7 +243,7 @@ function readlineExt(options) {
 }
 
 // piping via files (node v0.10-)
-function _execFileSync(cmdArgs, execOptions) {
+function _execFileSync(options, execOptions) {
 
   function getTempfile(name) {
     var path = require('path'), filepath, suffix = '', fd;
@@ -263,7 +267,7 @@ function _execFileSync(cmdArgs, execOptions) {
     return filepath;
   }
 
-  var execArgs, interpreter, res = {}, exitCode,
+  var hostArgs, shellPath, shellArgs, res = {}, exitCode,
     pathStdout  = getTempfile('readline-sync.stdout'),
     pathStderr  = getTempfile('readline-sync.stderr'),
     pathExit    = getTempfile('readline-sync.exit'),
@@ -275,25 +279,27 @@ function _execFileSync(cmdArgs, execOptions) {
   password = shasum.digest('hex');
   decipher = crypto.createDecipher(ALGORITHM_CIPHER, password);
 
+  if (IS_WIN) { options.encoded = true; }
+  hostArgs = getHostArgs(options);
   if (IS_WIN) {
-    interpreter = process.env.ComSpec || 'cmd.exe';
+    shellPath = process.env.ComSpec || 'cmd.exe';
     process.env.Q = '"'; // The quote (") that isn't escaped.
     // `()` for ignore space by echo
-    execArgs = ['/V:ON', '/S', '/C',
-      '(%Q%' + interpreter + '%Q% /V:ON /S /C %Q%' +
-        '%Q%' + extHostPath + '%Q% //nologo %Q%' + extScriptPath + '%Q%' +
-          cmdArgs.map(function(arg) { return ' %Q%' + arg + '%Q%'; }).join('') +
+    shellArgs = ['/V:ON', '/S', '/C',
+      '(%Q%' + shellPath + '%Q% /V:ON /S /C %Q%' +
+        '%Q%' + extHostPath + '%Q%' +
+          hostArgs.map(function(arg) { return ' %Q%' + arg + '%Q%'; }).join('') +
         ' & (echo !ERRORLEVEL!)>%Q%' + pathExit + '%Q%%Q%) 2>%Q%' + pathStderr + '%Q%' +
       ' |%Q%' + process.execPath + '%Q% %Q%' + __dirname + '\\encrypt.js%Q%' +
         ' %Q%' + ALGORITHM_CIPHER + '%Q% %Q%' + password + '%Q%' +
         ' >%Q%' + pathStdout + '%Q%' +
       ' & (echo 1)>%Q%' + pathDone + '%Q%'];
   } else {
-    interpreter = extHostPath;
-    execArgs = ['-c',
+    shellPath = extHostPath;
+    shellArgs = ['-c',
       // Use `()`, not `{}` for `-c` (text param)
-      '("' + extHostPath + '" "' + extScriptPath + '"' +
-          cmdArgs.map(function(arg)
+      '("' + extHostPath + '"' +
+          hostArgs.map(function(arg)
             { return " '" + arg.replace(/'/g, "'\\''") + "'"; }).join('') +
         '; echo $?>"' + pathExit + '") 2>"' + pathStderr + '"' +
       ' |"' + process.execPath + '" "' + __dirname + '/encrypt.js"' +
@@ -302,11 +308,12 @@ function _execFileSync(cmdArgs, execOptions) {
       '; echo 1 >"' + pathDone + '"'];
   }
   try {
-    childProc.spawn(interpreter, execArgs, execOptions);
+    childProc.spawn(shellPath, shellArgs, execOptions);
   } catch (e) {
     res.error = new Error(e.message);
     res.error.method = '_execFileSync - spawn';
-    res.error.interpreter = interpreter;
+    res.error.program = shellPath;
+    res.error.args = shellArgs;
   }
 
   while (fs.readFileSync(pathDone, {encoding: encoding}).trim() !== '1') {}
@@ -317,9 +324,9 @@ function _execFileSync(cmdArgs, execOptions) {
   } else {
     res.error = new Error(DEFAULT_ERR_MSG);
     res.error.method = '_execFileSync';
-    res.error.command = extScriptPath;
-    res.error.args = cmdArgs;
-    res.error.ExtMessage = fs.readFileSync(pathStderr, {encoding: encoding}).trim();
+    res.error.program = shellPath;
+    res.error.args = shellArgs;
+    res.error.extMessage = fs.readFileSync(pathStderr, {encoding: encoding}).trim();
     res.error.exitCode = +exitCode;
   }
 
@@ -331,6 +338,38 @@ function _execFileSync(cmdArgs, execOptions) {
   return res;
 }
 
+function getHostArgs(options) {
+  // To send any text to crazy Windows shell safely.
+  function encodeDOS(arg) {
+    return arg.replace(/[^\w\u0080-\uFFFF]/g, function(chr) {
+      return '#' + chr.charCodeAt(0) + ';';
+    });
+  }
+
+  return extHostArgs.concat((function(conf) {
+    var args = [], key;
+    for (key in conf) {
+      if (conf.hasOwnProperty(key)) {
+        if (conf[key] === 'boolean') {
+          if (options[key]) { args.push('--' + key); }
+        } else if (conf[key] === 'string') {
+          if (options[key] !== '') {
+            args.push('--' + key,
+              options.encoded ? encodeDOS(options[key]) : options[key]);
+          }
+        }
+      }
+    }
+    return args;
+  })({
+    display:      'string',
+    noEchoBack:   'boolean',
+    mask:         'string',
+    keyIn:        'boolean',
+    encoded:      'boolean'
+  }));
+}
+
 // for dev
 exports._useExtSet = function(use) { useExt = use; };