CS2011, A Term 1999 Prof. Sergio A. Alvarez ASCII Hex codes 0-1F: control characters Hex Name Meaning 0 NUL Null 1 SOH Start of Heading 2 STX Start of Text 3 ETX End of Text 4 EOT End of Transmission 5 ENQ Enquiry 6 ACK Acknowledgement 7 BEL Bell 8 BS Backspace 9 HT Horizontal Tab A LF Line Feed B VT Vertical Tab C FF Form Feed D CR Carriage Return E SO Shift Out F SI Shift In 10 DLE Data Link Escape 11 DC1 Device Control 1 12 DC1 Device Control 2 13 DC1 Device Control 3 14 DC1 Device Control 4 15 NAK Negative Acknowledgement 16 SYN Synchronous Idle 17 ETB End of Transmission Block 18 CAN Cancel 19 EM End of Medium 1A SUB Substitute 1B ESC Escape 1C FS File Separator 1D GS Group Separator 1E RS Record Separator 1F US Unit Separator Hex codes 20-7F: printable characters (below, hex code is row # + column #; for example, the ASCII code for 'H' is 48h) 0 1 2 3 4 5 6 7 8 9 A B C D E F 20 ! " # $ % & ' ( ) * + , - . / 30 0 1 2 3 4 5 6 7 8 9 : ; < = > ? 40 @ A B C D E F G H I J K L M N O 50 P Q R S T U V W X Y Z [ \ ] ^ _ 60 ` a b c d e f g h i j k l m n o 70 p q r s t u v w x y z { | } ~