diff --git a/assets/bios/TBMBIOS.js b/assets/bios/TBMBIOS.js
index f402b78..7b467f5 100644
--- a/assets/bios/TBMBIOS.js
+++ b/assets/bios/TBMBIOS.js
@@ -79,4 +79,6 @@ else {
     let response = eval("let basica=function(exec_args){"+sys.romReadAll()+"};basica;")();
 
     if (response !== 0) println("No ROM BASIC system halted");
-}
\ No newline at end of file
+}
+
+sys.poke(-90,128)
\ No newline at end of file
diff --git a/assets/bios/openbios.js b/assets/bios/openbios.js
index 4756fb9..134d858 100644
--- a/assets/bios/openbios.js
+++ b/assets/bios/openbios.js
@@ -162,3 +162,5 @@ while (sys.nanoTime() - tmr < 3 * 1000000000.0) {
 
 if (!sysRq) bootFromFirst()
 else runConfigurator()
+
+sys.poke(-90,128)
\ No newline at end of file
diff --git a/assets/bios/quick.js b/assets/bios/quick.js
index 22055e7..e4f8456 100644
--- a/assets/bios/quick.js
+++ b/assets/bios/quick.js
@@ -29,4 +29,6 @@ if (portNumber < 4) {
 }
 else {
     printerrln("No bootable medium found.");
-}
\ No newline at end of file
+}
+
+sys.poke(-90,128)
\ No newline at end of file
diff --git a/assets/bios/tandemport.js b/assets/bios/tandemport.js
index 179ccac..9954bdb 100644
--- a/assets/bios/tandemport.js
+++ b/assets/bios/tandemport.js
@@ -53,4 +53,6 @@ if (portNumber < 4) {
 }
 else {
     printerrln("No bootable medium found.");
-}
\ No newline at end of file
+}
+
+sys.poke(-90,128)
\ No newline at end of file
diff --git a/assets/bios/tsvmbios.js b/assets/bios/tsvmbios.js
index 6e89121..051931e 100644
--- a/assets/bios/tsvmbios.js
+++ b/assets/bios/tsvmbios.js
@@ -100,3 +100,5 @@ if (portNumber < 4) {
 else {
 	printerrln("No bootable medium found.");
 }
+
+sys.poke(-90,128)
\ No newline at end of file
diff --git a/assets/disk0/!BOOTSEC b/assets/disk0/!BOOTSEC
index 518291b..cc49c78 100644
--- a/assets/disk0/!BOOTSEC
+++ b/assets/disk0/!BOOTSEC
@@ -1 +1 @@
-let p=_BIOS.FIRST_BOOTABLE_PORT;com.sendMessage(p[0],"DEVRST\x17");com.sendMessage(p[0],'OPENR"tvdos/TVDOS.SYS",'+p[1]);let r=com.getStatusCode(p[0]);if(0==r)if(com.sendMessage(p[0],"READ"),r=com.getStatusCode(p[0]),0==r){let g=com.pullMessage(p[0]);eval(g)}else println("I/O Error");else println("TVDOS.SYS not found");println("Shutting down...");println("It is now safe to turn off the power");sys.poke(-90,128)
\ No newline at end of file
+let p=_BIOS.FIRST_BOOTABLE_PORT;com.sendMessage(p[0],"DEVRST\x17");com.sendMessage(p[0],'OPENR"tvdos/TVDOS.SYS",'+p[1]);let r=com.getStatusCode(p[0]);if(0==r)if(com.sendMessage(p[0],"READ"),r=com.getStatusCode(p[0]),0==r){let g=com.pullMessage(p[0]);eval(g)}else println("I/O Error");else println("TVDOS.SYS not found");println("Shutting down...");println("It is now safe to turn off the power")
\ No newline at end of file
diff --git a/assets/disk0/root.bootable/!BOOTSEC b/assets/disk0/root.bootable/!BOOTSEC
index 518291b..cc49c78 100644
--- a/assets/disk0/root.bootable/!BOOTSEC
+++ b/assets/disk0/root.bootable/!BOOTSEC
@@ -1 +1 @@
-let p=_BIOS.FIRST_BOOTABLE_PORT;com.sendMessage(p[0],"DEVRST\x17");com.sendMessage(p[0],'OPENR"tvdos/TVDOS.SYS",'+p[1]);let r=com.getStatusCode(p[0]);if(0==r)if(com.sendMessage(p[0],"READ"),r=com.getStatusCode(p[0]),0==r){let g=com.pullMessage(p[0]);eval(g)}else println("I/O Error");else println("TVDOS.SYS not found");println("Shutting down...");println("It is now safe to turn off the power");sys.poke(-90,128)
\ No newline at end of file
+let p=_BIOS.FIRST_BOOTABLE_PORT;com.sendMessage(p[0],"DEVRST\x17");com.sendMessage(p[0],'OPENR"tvdos/TVDOS.SYS",'+p[1]);let r=com.getStatusCode(p[0]);if(0==r)if(com.sendMessage(p[0],"READ"),r=com.getStatusCode(p[0]),0==r){let g=com.pullMessage(p[0]);eval(g)}else println("I/O Error");else println("TVDOS.SYS not found");println("Shutting down...");println("It is now safe to turn off the power")
\ No newline at end of file
diff --git a/assets/disk0/root.live/!BOOTSEC b/assets/disk0/root.live/!BOOTSEC
index 90b2c0d..0640c1e 100644
--- a/assets/disk0/root.live/!BOOTSEC
+++ b/assets/disk0/root.live/!BOOTSEC
@@ -1 +1 @@
-let p=_BIOS.FIRST_BOOTABLE_PORT;com.sendMessage(p[0],"DEVRST\x17");com.sendMessage(p[0],'OPENR"tvdos/TVDOS.SYS",'+p[1]);let r=com.getStatusCode(p[0]);if(0==r)if(com.sendMessage(p[0],"READ"),r=com.getStatusCode(p[0]),0==r){let g=com.pullMessage(p[0]);eval(g)}else println("The Installation Medium seems to be damaged. Please contact your reseller or system administrators.");else println("TVDOS.SYS not found");println();println("Remove the Installation Medium, close the tray (if any), then shut off and restart the computer to finish the installation.");sys.poke(-90,128)
\ No newline at end of file
+let p=_BIOS.FIRST_BOOTABLE_PORT;com.sendMessage(p[0],"DEVRST\x17");com.sendMessage(p[0],'OPENR"tvdos/TVDOS.SYS",'+p[1]);let r=com.getStatusCode(p[0]);if(0==r)if(com.sendMessage(p[0],"READ"),r=com.getStatusCode(p[0]),0==r){let g=com.pullMessage(p[0]);eval(g)}else println("The Installation Medium seems to be damaged. Please contact your reseller or system administrators.");else println("TVDOS.SYS not found");println();println("Remove the Installation Medium, close the tray (if any), then shut off and restart the computer to finish the installation.")
\ No newline at end of file
diff --git a/assets/disk0/tvdos/bin/command.js b/assets/disk0/tvdos/bin/command.js
index bf54a55..af33fc1 100644
--- a/assets/disk0/tvdos/bin/command.js
+++ b/assets/disk0/tvdos/bin/command.js
@@ -512,8 +512,8 @@ shell.coreutils = {
         let sourceFile = files.open(path.full)
         let destFile = files.open(pathd.full)
 
-        debugprintln(`[cp] source path: ${path.full}`)
-        debugprintln(`[cp] dest path: ${pathd.full}`)
+        debugprintln(`[mv] source path: ${path.full}`)
+        debugprintln(`[mv] dest path: ${pathd.full}`)
 
         if (sourceFile.isDirectory || !sourceFile.exists) { printerrln(`${args[0].toUpperCase()} failed for '${sourceFile.fullPath}'`); return 1 } // if file is directory or failed to open, IO error code will be returned
         if (destFile.isDirectory) { printerrln(`${args[0].toUpperCase()} failed for '${destFile.fullPath}'`); return 1 } // if file is directory or failed to open, IO error code will be returned
diff --git a/assets/disk0/tvdos/installer/!BOOTSEC b/assets/disk0/tvdos/installer/!BOOTSEC
index 518291b..cc49c78 100644
--- a/assets/disk0/tvdos/installer/!BOOTSEC
+++ b/assets/disk0/tvdos/installer/!BOOTSEC
@@ -1 +1 @@
-let p=_BIOS.FIRST_BOOTABLE_PORT;com.sendMessage(p[0],"DEVRST\x17");com.sendMessage(p[0],'OPENR"tvdos/TVDOS.SYS",'+p[1]);let r=com.getStatusCode(p[0]);if(0==r)if(com.sendMessage(p[0],"READ"),r=com.getStatusCode(p[0]),0==r){let g=com.pullMessage(p[0]);eval(g)}else println("I/O Error");else println("TVDOS.SYS not found");println("Shutting down...");println("It is now safe to turn off the power");sys.poke(-90,128)
\ No newline at end of file
+let p=_BIOS.FIRST_BOOTABLE_PORT;com.sendMessage(p[0],"DEVRST\x17");com.sendMessage(p[0],'OPENR"tvdos/TVDOS.SYS",'+p[1]);let r=com.getStatusCode(p[0]);if(0==r)if(com.sendMessage(p[0],"READ"),r=com.getStatusCode(p[0]),0==r){let g=com.pullMessage(p[0]);eval(g)}else println("I/O Error");else println("TVDOS.SYS not found");println("Shutting down...");println("It is now safe to turn off the power")
\ No newline at end of file
diff --git a/doc/tvdos.tex b/doc/tvdos.tex
index 2157247..ae7918c 100644
--- a/doc/tvdos.tex
+++ b/doc/tvdos.tex
@@ -10,16 +10,31 @@ All \thedos-related features requires the DOS to be fully loaded.
 \index{boot process}\thedos\ goes through follwing progress to deliver the \code{A:\rs} prompt:
 
 \section{Probing Bootable Devices}
-BIOS
+The BIOS will probe serial devices to find first bootable drive. If found, port number of the driver is written to the \code{\_BIOS} object, then attempts to load and run the bootloader.
 
 \section{The Bootloader}
-LOADBOOT
-
-Then the Bootsector will try to read and execute \code{A:\rs{}tvdos\rs{}TVDOS.SYS}
+The Bootloader is a short program that loads the \code{TVDOS.SYS} file.
 
 \section{TVDOS.SYS}
 \thedos.SYS will load system libraries and variables and then will try to run the boot script by executing \code{A:\rs{}AUTOEXEC.BAT}
 
+Boot Procedure:
+
+\begin{enumerate}
+ \item define \code{\_TVDOS} objects
+ \item probe filesystem devices
+ \item initialise DOS variables
+ \item install filesystem drivers
+ \item install input device drivers
+ \item install GL using the external file
+ \item execute \code{AUTOEXEC.BAT}
+ \begin{enumerate}
+  \item execute \code{command.js} with proper arguments
+  \item \code{command.js} to initialise \code{shell.*} functions (this includes coreutils and patched version of \code{require})
+  \item \code{command.js} to parse and run \code{AUTOEXEC.BAT}
+ \end{enumerate}
+\end{enumerate}
+
 \section{AUTOEXEC.BAT}
 
 AUTOEXEC can setup user-specific variables (e.g. keyboard layout) and launch the command shell of your choice, \code{COMMAND} is the most common shell.
@@ -43,6 +58,7 @@ Variables can be set or changed using \textbf{SET} commands.
 \1\dossynopsis{echo}[text]{Print the given text or a variable.}
 \1\dossynopsis{exit}{Exits the current command processor.}
 \1\dossynopsis{mkdir}[path]{Creates a directory. Aliase: md}
+\1\dossynopsis{mv}[from to]{Moves or renames the file. Aliase: move}
 \1\dossynopsis{rem}{Comment-out the line.}
 \1\dossynopsis{set}[key=value]{Sets the global variable \code{key} to \code{value}, or displays the list of global variables if no arguments were given.}
 \1\dossynopsis{ver}{Prints the version of \thedos.}
@@ -95,7 +111,11 @@ DOS coreutils and some of the internal functions can be used on Javascript progr
 To invoke the coreutils, use \code{\_G.shell.coreutils.*}
 
 \begin{outline}
-\1\inlinesynopsis[\_G.shell]{resolvePathInput}[path]{Returns fully-qualified path of the input path, relative to the current working directory.}
+\1\inlinesynopsis[\_G.shell]{resolvePathInput}[path]{Returns path object for the input path, relative to the current working directory. Object contains:}
+ \2\argsynopsis{full}{fully-qualified path}
+ \2\argsynopsis{string}{fully-qualified path without the drive letter}
+ \2\argsynopsis{drive}{drive letter of the path}
+ \2\argsynopsis{pwd}{working directory for the path}
 \1\inlinesynopsis[\_G.shell]{getPwdString}[]{Returns the current working directory as a string.}
 \1\inlinesynopsis[\_G.shell]{getCurrentDrive}[]{Returns the drive letter of the current working drive.}
 \1\inlinesynopsis[\_G.shell]{execute}[command]{Executes the DOS command.}
@@ -177,6 +197,10 @@ Functions:
  \2\argsynopsis{offset}{when writing to the file, how many bytes on the file to skip before writing a first byte.}
 \1\formalsynopsis{bwrite}{bytes: Uint8Array}{Writes the bytes to the file.}
 \1\formalsynopsis{swrite}{string: String}{Writes the string to the file.}
+\1\formalsynopsis{pappend}{pointer: Int, count: Int}{Appends the bytes stored in the memory starting from the pointer to the end of the file.}
+\2\argsynopsis{count}{how many bytes to write}
+\1\formalsynopsis{bappend}{bytes: Uint8Array}{Appends the bytes to the end of the file.}
+\1\formalsynopsis{sappend}{string: String}{Appends the string to the end of the file.}
 \1\formalsynopsis{flush}{}{Flush the contents on the write buffer to the file immediately. Will do nothing if there is no write buffer implemented --- a write operation will always be performed imemdiately in such cases.}
 \1\formalsynopsis{close}{}{Tells the underlying device (usually a disk drive) to close a file. When dealing with multiple files on a single disk drive (in which can only have a single active---or opened---file), the underlying filesystem driver will automatically swap the files around, so this function is normally unused.}
 \1\formalsynopsis{list}{}[Array or undefined]{Lists files inside of the directory. If the path is indeed a directory, an array of file descriptors will be returned; \code{undefined} otherwise.}
@@ -246,11 +270,13 @@ Input events are Javascript array of: $$ [\mathrm{event\ name,\ arg_1,\ arg_2 \c
  \2\argsynopsis{\argN{5}}{Y-position of the mouse cursor on the previous frame}
 \end{outline}
 
+
+
 \chapter{The Graphics Library}
 
 \thedos\ provides the library for drawing pixels to the screen.
 
-\dosnamespaceis{Graphics}{gl}
+\dosnamespaceis{Graphics}{GL}
 
 Classes:
 
@@ -283,3 +309,45 @@ Functions:
 \1\formalsynopsis{drawSpriteOver}{sheet, xi, yi, x, y, framebuffer, overrideFG}{Same as the \code{drawSprite} except the transparency will be taken into account.}
 
 \end{outline}
+
+
+
+\chapter{External Libraries}
+
+
+External libraries are packaged codes with the intention of being re-used by other programs, and can be loaded using the \code{require()} function.
+
+\section{Loading the Libraries}
+
+External libraries can be stored in following locations:
+
+\begin{enumerate}
+ \item \code{A:\rs{}tvdos\rs{}include}
+ \item a path relative to the user program
+ \item an absolute path that can be anywhere
+\end{enumerate}
+
+and can be loaded by:
+
+\begin{enumerate}
+ \item \code{let name = require(libraryname)} // no .js extension
+ \item \code{let name = require(./libraryname)} // the relative path must start with a dot-slash
+ \item \code{let name = require(A:/path/to/library.js)} // full path WITH the .js extension
+\end{enumerate}
+
+
+\section{Writing Your Own Libraries}
+
+Codes in the library must be exported to be made available to other programs, and \thedos\ provides \code{exports} variable for the purpose.
+
+Functions and variables can be exported by defining the \code{exports} object; example code:
+
+\begin{lstlisting}
+function foo() {
+    println("Hello, module!")
+}
+const BAR = 127
+
+// following line exports the function and the variable
+exports = { foo, BAR }
+\end{lstlisting}
\ No newline at end of file