The following character string from the host The initial delimiter of an escape sequence â interpret Octal Value of Code Sent or Received by VT100Īction The Terminal Would Take If Host Sent That Codeĭeposit a space on the screen erasing what was there before. If these codes are received by the terminal, the VT100 will perform theĪssociated function as shown in Table 3-4. Control codes do not produce displayable characters but are codes forįunctions. Table 3-3 Nonalphabetic Key Codes Lowercase Characterįunction Keys â There are several keys on the keyboard which transmit controlĬodes. These keys it affects only the alphabetic keys. Unlike the SHIFT LOCK key of a typewriter, the CAPS LOCK key does not affect The other code will be generated if either or both of the SHIFT keys are down. One code will be generated if neither SHIFT key is pressed. Nonalphabetic Keys â Each of the nonalphabetic keys can be used to generate Table 3-2 shows the codes generated by the alphabetic keys. The CAPS LOCK key will lock only the 26 alphabetic keys in the shifted If three such keys are pressed simultaneously, theĬodes for the first two keys are transmitted immediately the code for the third willīe transmitted when one of the first two keys is lifted.Īlphabetic Keys â The VT100 will transmit the lowercase code unless either orīoth of the SHIFT keys are down, or unless the CAPS LOCK key is down. Not wait for the keys to be lifted, but will transmit both codes as soon as possibleĪfter the keys are first typed. Transmitted according to the order in which the keys were typed. If two code-transmitting keys are pressed together, two codes will be Sound to verify to the operator that the keystroke has been processed by the The code-transmitting keys cause the terminal to make a clicking Other keys such as CTRLĪnd SHIFT do not transmit codes when typed, but modify the codes transmittedīy other keys. ![]() One or more codes to the host immediately when typed. The operator uses the keyboard to transmit codes to the host. * The appropriate control or escape sequence mnemonic is indicated in parentheses. Table 3-1 Machine States SET-UP Feature or Machine State Those SET-UP features which may be modifiedīy the host are listed in Table 3-1 and described in detail under the escape sequences. The procedures to change the SET-UP features are provided in the operatorâs Turning the terminal power off does not, by itself, alter the terminal configuration. Performed in SET-UP mode can be stored in nonvolatile memory (NVR) so that The SET-UP key is at the upper-left corner of the main key array. The code sequences to turn these LEDs on or off are discussed The four remaining LEDs are programmable and can be assigned any meaning for Host through the transmission of an XOFF to the terminal. Has been âturned offâ automatically by the terminal due to a full buffer or by the Shown by one of the two LEDs being on that is, if the keyboard is connectedĪnd power is on, one of these LEDs will be on.Ī third LED indicates a âkeyboard lockedâ condition. To the complementary ON-LINE/LOCAL function. The keyboard has seven light emitting diodes (LEDs) of which two are committed VT100 Keyboard CLEAR TAB SET/ TABS CLEAR ALL LOCAL LINE/ A/B SETUP I/O TOGGLE SPEED TRANSMIT SPEED RECEIVE COLUMNS 80/132 RESET ON LINE LOCAL LOCKED KBD L1 L2 元 L4 SET UP PF1 PF2 PF3 PF4 ESC 1 ! 2 3 # £ 4 $ 5 % 6 ^ 7 & 8 * 9 ( 0 ) - _ = + ` ~ SPACE BACK BREAK 7 8 9 - TAB Q W E R T Y U I O P [ RETURN DELETE 4 5 6, CTRL LOCK CAPS A S D F G BELL H J K L : ' " \ | 1 2 3 ENTER SCROLL NO SHIFT Z X C V B N M, / ? SHIFT FEED LINE 0. VT100 keyboard has additional keys and indicators used to generate control sequences,Ĭursor control commands, and to show the current terminal status. ![]() In addition to the standard typewriter keys the The VT100 uses a keyboard with a key arrangement similar to an ordinary office Included are codes generated by the keyboard the transmission protocolįollowed by the terminal and the actions and reactions of the terminal to controlįunctions in both ANSI and VT52 modes of operation. This section of the userâs manual discusses data flow between the VT100 and the SCREEN RECEIVER KEYBOARD TRANSMITTER COMPUTER (HOST) COMMUNICATION LINES VT100 MA-1994 Figure 3-1 Terminal Data Flow The computer is displayed on the video screen. ![]() Is simultaneously an output device for the computer â that is, data coming in from It is an input device toĪ computer â information entered through the keyboard is sent to the computer. The VT100 terminal normally performs a two-part function. Digital VT100 User Guide: Programmer Information VT100 User GuideĬhapter 2 Contents Chapter 4 Chapter 3 Programmer Information
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