NetNews Usenet Archive 1992 #20

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Internet Message Format | 1992-09-14 | 25.9 KB

Path: sparky!uunet!haven.umd.edu!darwin.sura.net!zaphod.mps.ohio-state.edu!pacific.mps.ohio-state.edu!linac!att!ucbvax!TSO.UC.EDU!usr3947a From: usr3947a@TSO.UC.EDU (Kenneth Wronkiewicz) Newsgroups: comp.sys.apple2 Subject: ANSI/VT-100 Message-ID: <9209142220.AA15914@tso.uc.edu> Date: 14 Sep 92 22:20:14 GMT Sender: daemon@ucbvax.BERKELEY.EDU Distribution: world Organization: The Internet Lines: 517 v^v^v^v^v^v^v^v^v^v^v^v^v^v^v^v^v^v^v^v^v^v^v^v^v^v^v^v^v^v^v^v^v^v^v^v^v^v ANSI & DEC VT100 Codes ^v^v^v^v^v^v^v^v^v^v^v^v^v^v^v^v^v^v^v^v^v^v^v^v^v^v^v^v^v^v^v^v^v^v^v^v^v^ The following text will describe the various escape codes that allow computers to transmit color text over communication lines. Using ANSI escape codes, any computer can receive and transmit color text as long as the communication program can interpret the escape sequences. The escape sequences can be thought of the same as ones sent to a printer to change the appearance of the output. All ANSI codes begin with the one byte character ESC (decimal 27), and are followed by the left bracket "[". Additional parameters, which follow the bracket are seperated with a semi- colon. All codes are ended with a single alphabetic character which determines the function of the escape sequence. Since the characters come in one at a time, as soon as the ESC character is received start building the sequence until an alphabetic character is input. The case of the alphabetic character is very important since they mean different things. For example,"H" (which means set cursor position) is different than "h" ,(which means set the display width and type). Notes: 1) The default value is used when no explicit value is given, or a value of zero, is specified. 2) The default value is 1 unless otherwise specified below. 3) # - Numeric Parameter. A decimal number specified with ASCII characters. 4) In the control sequences described below, ESC is the 1 byte code for ESC (decimal 27), and not the three characters "ESC". CURSOR CONTROL Cursor Position (CUP) ESC[#;#H Moves the cursor to the position specified by the parameter. The first parameter specifies the line number and the second parameter specifies the column number. If no parameter is given, the cursor is moved to the home position (Row 1, Column 1). Example: ESC[10;20H - moves the cursor to row 10, column 20. Cursor Up (CUU) ESC[#A Moves the cursor up # lines without changing columns. The value of # determines the number of lines to move up. This sequence is ignored if the cursor is already on the top line. Example: ESC[5A - moves the cursor up 5 lines without changing columns. Cursor Down (CUD) ESC[#B Moves the cursor down # lines without changing columns. The value of # determines the number of lines to move down. This sequence is ignored if the cursor is already on the bottom line. Example: ESC[5B - moves the cursor down 5 lines without changing columns. Cursor Forward (CUF) ESC[#C Moves the cursor forward # columns without changing lines. The value of # determines the number of columns moved forward. This sequence is ignored if the cursor is already in the rightmost column. Example: ESC[25C - moves the cursor forward 25 columns. Cursor Backward (CUB) ESC[#n Moves the cursor back # columns without changing lines. The value # determines the number of columns moved backwards. This sequence is ignored if the cursor is already in the leftmost column. Example: ESC[1n - moves the cursor backwards 1 column. Horizontal and Vertical Position (HVP) ESC[#;#f This control sequence is the same as CUP. Example: ESC[10;20f - moves the cursor to row 10, column 20. Device Status Report (DSR) ESC[6n Upon receipt of this command, the console driver will output a CPR sequence as described below. Cursor Position Report (CPR) ESC[#;#R The CPR sequence reports the current cursor position through the standard input device. The first parameter specifies the current line and the second parameter specifies the current column. Save Cursor Position (SCP) ESC[s The current cursor position is saved. This cursor position can be restored with the RCP sequence. Restore Cursor Position (RCP) ESC[u Restores the cursor to the value it had when the control sequence SCP was received. Erase in Display (ED) ESC[2J Erases all of the screen and the cursor goes to the home position (row 1, column 1). Erase in Line (EL) ESC[k Erases from the cursor to the end of the line and includes the cursor position. Set Graphics Rendition (SGR) ESC[#;...;#m Set the character attribute specified by then parameter(s). All following characters will have the attribute according to the parameter(s) until the next occurrence of SGR. Note: attribute means the foreground color, the background color, blink, high intensity, underscore, reverse video, and invisible. Parameter Meaning 0 All Attributes Off (white on black) 1 Bold On (high intensity) 4 Underscore On (Some monitors only) 5 Blink On 7 Reverse Video 8 Cancelled On (invisible) 30 Black Foreground 31 Red Foreground 32 Green Foreground 33 Yellow Foreground 34 Blue Foreground 35 Magenta Foreground 36 Cyan Foreground 37 White Foreground 40 Black Background 41 Red Background 42 Green Background 43 Yellow Background 44 Blue Background 45 Magenta Background 46 Cyan Background 47 White Background Example: ESC[33;40;1m - all following characters will have a Yellow foreground, a Black background, and be in high intensity until receipt of another SGR control sequence. ESC[0m - all following characters will have a white foreground, on a black background, in normal intensity. Note: Several parameters can be stacked. For example, ESC[0;1;5;7;31;44m the above example will reset the attributes, set high intensity, set blink on, set reversed video, set foreground color to red, and set background color to blue. Note that since reverse video is on the foreground will actually be blue and the background will be red. Here is the requested list of ANSI control sequences. I picked it up off of the Usenet a while back. ANSI Standard (X3.64) Control Sequences for Video Terminals and Peripherals in alphabetic order by mnemonic (Inspired by the article "Toward Standardized Video Terminals: ANSI X3.64 Device Control" by Mark L. Siegel, April 1984 BYTE, page 365) Note: This describes the VT-100 standard. (Ps and Pn are parameters expressed in ASCII.) (Numeric parameters are given in decimal radix.) (Abbreviations are explained in detail at end.) (Spaces used in this table for clarity are not used in the actual codes.) Default Type Sequence Sequence Parameter or Mnemonic Name Sequence Value Mode --------------------------------------------------------------------------- APC Applicatn Program Command Esc Fe Delim CBT Cursor Backward Tab Esc [ Pn Z 1 EdF CCH Cancel Previous Character Esc T CHA Cursor Horzntal Absolute Esc [ Pn G 1 EdF CHT Cursor Horizontal Tab Esc [ Pn I 1 EdF CNL Cursor Next Line Esc [ Pn E 1 EdF CPL Cursor Preceding Line Esc [ Pn F 1 EdF CPR Cursor Position Report Esc [ Pn ; Pn R 1, 1 CSI Control Sequence Intro Esc [ Intro CTC Cursor Tab Control Esc [ Ps W 0 EdF CUB Cursor Backward Esc [ Pn D 1 EdF CUD Cursor Down Esc [ Pn B 1 EdF CUF Cursor Forward Esc [ Pn C 1 EdF CUP Cursor Position Esc [ Pn ; Pn H 1, 1 EdF CUU Cursor Up Esc [ Pn A 1 EdF CVT Cursor Vertical Tab Esc [ Pn Y EdF DA Device Attributes Esc [ Pn c 0 DAQ Define Area Qualification Esc [ Ps o 0 DCH Delete Character Esc [ Pn P 1 EdF DCS Device Control String Esc P Delim DL Delete Line Esc [ Pn M 1 EdF DMI Disable Manual Input Esc \ Fs DSR Device Status Report Esc [ Ps n 0 EA Erase in Area Esc [ Ps O 0 EdF ECH Erase Character Esc [ Pn X 1 EdF ED Erase in Display Esc [ Ps J 0 EdF EF Erase in Field Esc [ Ps N 0 EdF EL Erase in Line Esc [ Ps K 0 EdF EMI Enable Manual Input Esc b Fs EPA End of Protected Area Esc W ESA End of Selected Area Esc G FNT Font Selection Esc [ Pn ; Pn Space D 0, 0 FE GSM Graphic Size Modify Esc [ Pn ; Pn Space B 100, 100 FE GSS Graphic Size Selection Esc [ Pn Space C none FE HPA Horz Position Absolute Esc [ Pn ` 1 FE HPR Horz Position Relative Esc [ Pn a 1 FE HTJ Horz Tab w/Justification Esc I FE HTS Horizontal Tab Set Esc H FE HVP Horz & Vertical Position Esc [ Pn ; Pn f 1, 1 FE ICH Insert Character Esc [ Pn @ 1 EdF IL Insert Line Esc [ Pn L 1 EdF IND Index Esc D FE INT Interrupt Esc a Fs JFY Justify Esc [ Ps ; ... ; Ps Space F 0 FE MC Media Copy Esc [ Ps i 0 MW Message Waiting Esc U NEL Next Line Esc E FE NP Next Page Esc [ Pn U 1 EdF OSC Operating System Command Esc ] Delim PLD Partial Line Down Esc K FE PLU Partial Line Up Esc L FE PM Privacy Message Esc ^ Delim PP Preceding Page Esc [ Pn V 1 EdF PU1 Private Use 1 Esc Q PU2 Private Use 2 Esc R QUAD Typographic Quadding Esc [ Ps Space H 0 FE REP Repeat Char or Control Esc [ Pn b 1 RI Reverse Index Esc M FE RIS Reset to Initial State Esc c Fs RM Reset Mode Esc [ Ps l none SD Scroll Down Esc [ Pn T 1 EdF SEM Select Edit Extent Mode Esc [ Ps Q 0 SGR Select Graphic Rendition Esc [ Ps m 0 FE SL Scroll Left Esc [ Pn Space @ 1 EdF SM Select Mode Esc [ Ps h none SPA Start of Protected Area Esc V SPI Spacing Increment Esc [ Pn ; Pn Space G none FE SR Scroll Right Esc [ Pn Space A 1 EdF SS2 Single Shift 2 (G2 set) Esc N Intro SS3 Single Shift 3 (G3 set) Esc O Intro SSA Start of Selected Area Esc F ST String Terminator Esc \ Delim STS Set Transmit State Esc S SU Scroll Up Esc [ Pn S 1 EdF TBC Tab Clear Esc [ Ps g 0 FE TSS Thin Space Specification Esc [ Pn Space E none FE VPA Vert Position Absolute Esc [ Pn d 1 FE VPR Vert Position Relative Esc [ Pn e 1 FE VTS Vertical Tabulation Set Esc J FE --------------------------------------------------------------------------- Abbreviations: Intro an Introducer of some kind of defined sequence; the normal 7-bit X3.64 Control Sequence Introducer is the two characters "Escape [" Delim a Delimiter x/y identifies a character by position in the ASCII table (column/row) EdF editor function (see explanation) FE format effector (see explanation) F is a Final character in an Escape sequence (F from 3/0 to 7/14 in the ASCII table) a control sequence (F from 4/0 to 7/14) Gs is a graphic character appearing in strings (Gs ranges from 2/0 to 7/14) in the ASCII table Ce is a control represented as a single bit combination in the C1 set of controls in an 8-bit character set C0 the familiar set of 7-bit ASCII control characters C1 roughly, the set of control characters available only in 8-bit systems. This is too complicated to explain fully here, so read Jim Fleming's article in the February 1983 BYTE, especially pages 214 through 224. Fe is a Final character of a 2-character Escape sequence that has an equivalent representation in an 8-bit environment as a Ce-type (Fe ranges from 4/0 to 5/15) Fs is a Final character of a 2-character Escape sequence that is standardized internationally with identical representation in 7-bit and 8-bit environments and is independent of the currently designated C0 and C1 control sets (Fs ranges from 6/0 to 7/14) I is an Intermediate character from 2/0 to 2/15 (inclusive) in the ASCII table P is a parameter character from 3/0 to 3/15 (inclusive) in the ASCII table Pn is a numeric parameter in a control sequence, a string of zero or more characters ranging from 3/0 to 3/9 in the ASCII table Ps is a variable number of selective parameters in a control sequence with each selective parameter separated from the other by the code 3/11 (which usually represents a semicolon); Ps ranges from 3/0 to 3/9 and includes 3/11 v^v^v^v^v^v^v^v^v^v^v^v^v^v^v^v^v^v^v^v^v^v^v^v^v^v^v^v^v^v^v^v^v^v^v^v^v^v v^v^v^v^v^v^v^v^v^v^v^v^v^v^v^v^v^v^v^v^v^v^v^v^v^v^v^v^v^v^v^v^v^v^v^v^v^v Format Effectors versus Editor Functions A format effector specifies how the final output is to be created. An editor function allows you to modify the specification. For instance, a format effector that moves the "active position" (the cursor or equivalent) one space to the left would be useful when you want to create an over strike, a compound character made of two standard characters overlaid. Control-H, the Backspace character, is actually supposed to be a format effector, so you can do this. But many systems use it in a nonstandard fashion, as an editor function, deleting the character to the left of the cursor and moving the cursor left. When Control-H is assumed to be an editor function, you cannot predict whether its use will create an over strike unless you also know whether the output device is in an "insert mode" or an "overwrite mode". When Control-H is used as a format effector, its effect can always be predicted. The familiar characters carriage return, linefeed, formfeed, etc., are defined as format effectors. v^v^v^v^v^v^v^v^v^v^v^v^v^v^v^v^v^v^v^v^v^v^v^v^v^v^v^v^v^v^v^v^v^v^v^v^v^v ^v^v^v^v^v^v^v^v^v^v^v^v^v^v^v^v^v^v^v^v^v^v^v^v^v^v^v^v^v^v^v^v^v^v^v^v^v^ ANSI X3.64 Mode-Changing Parameters for use with the Select Mode (SM) and Reset Mode (RM) functions Parameter Mode Mode Function Characters Mnemonic column/ graphic row repres. ---------------------------------------------------------------------------- 3/0 0 an error condition 3/1 1 GATM guarded-area transfer mode 3/2 2 KAM keyboard action mode 3/3 3 CRM control representation mode 3/4 4 IRM insertion/replacement mode 3/5 5 SRTM status-reporting transfer mode 3/6 6 ERM erasure mode 3/7 7 VEM vertical editing mode 3/8 8 reserved for future standardization 3/9 9 reserved for future standardization 3/10 : reserved separator for parameters 3/11 ; Standard separator for parameters 3/12 < reserved for private (experimental) use 3/13 = reserved for private (experimental) use 3/14 > reserved for private (experimental) use 3/15 ? reserved for private (experimental) use 3/1 3/0 10 HEM horizontal editing mode 3/1 3/1 11 PUM positioning unit mode 3/1 3/2 12 SRM send/receive mode 3/1 3/3 13 FEAM format effector action mode 3/1 3/4 14 FETM format effector transfer mode 3/1 3/5 15 MATM multiple area transfer mode 3/1 3/6 16 TTM transfer termination mode 3/1 3/7 17 SATM selected area transfer mode 3/1 3/8 18 TSM tabulation stop mode 3/1 3/9 19 EBM editing boundary mode 3/1 3/10 1: reserved separator for parameters 3/1 3/11 1; Standard separator for parameters 3/1 3/12 1< error condition--unspecified recovery 3/1 3/13 1= error condition--unspecified recovery 3/1 3/14 1> error condition--unspecified recovery 3/1 3/15 1? error condition--unspecified recovery 3/2 3/0 20 LNM linefeed/newline mode (not in ISO 6429) 3/2 3/1 21 . . . . reserved for future standardization . . 3/9 3/9 99 3/12 3/0 <0 . . . . reserved for private (experimental) use . . 3/15 3/15 ?? v^v^v^v^v^v^v^v^v^v^v^v^v^v^v^v^v^v^v^v^v^v^v^v^v^v^v^v^v^v^v^v^v^v^v^v^v^v ^v^v^v^v^v^v^v^v^v^v^v^v^v^v^v^v^v^v^v^v^v^v^v^v^v^v^v^v^v^v^v^v^v^v^v^v^v^ NOTES ON THE DEC VT100 IMPLEMENTATION In the case of the popular DEC VT100 video-terminal implementation, the only mode that may be altered is the linefeed/newline (LNM) mode. Other modes are considered permanently set, reset, or not applicable as follows: Set: ERM Reset: CRM, EBM, FEAM, FETM, IRM, KAM, PUM, SRTM, TSM N/A: GATM, HEM, MATM, SATM, TTM, VEM Control sequences implemented in the VT100 are as follows: CPR, CUB, CUD, CUF, CUP, CUU, DA, DSR, ED, EL, HTS, HVP, IND, LNM, NEL, RI, RIS, RM, SGR, SM, TBC plus several private DEC commands. Erasing parts of the display (EL and ED) in the VT100 is performed thus: Erase from cursor to end of line Esc [ 0 K or Esc [ K Erase from beginning of line to cursor Esc [ 1 K Erase line containing cursor Esc [ 2 K Erase from cursor to end of screen Esc [ 0 J or Esc [ J Erase from beginning of screen to cursor Esc [ 1 J Erase entire screen Esc [ 2 J The VT100 responds to receiving the DA (Device Attributes) control Esc [ c (or Esc [ 0 c) by transmitting the sequence Esc [ ? l ; Ps c where Ps is a character that describes installed options. The VT100's cursor location can be read with the DSR (Device Status Report) control Esc [ 6 n The VT100 reports by transmitting the CPR sequence Esc [ Pl ; Pc R where Pl is the line number and Pc is the column number (in decimal). v^v^v^v^v^v^v^v^v^v^v^v^v^v^v^v^v^v^v^v^v^v^v^v^v^v^v^v^v^v^v^v^v^v^v^v^v^v ^v^v^v^v^v^v^v^v^v^v^v^v^v^v^v^v^v^v^v^v^v^v^v^v^v^v^v^v^v^v^v^v^v^v^v^v^v^ The complete document describing the standard, "ANSI X3.64-1979: Additional Controls for Use with the American National Standard Code for Information Interchange," can be ordered for $13.50 (plus $4 postage) from Standards Sales Department American National Standards Institute 1430 Broadway New York, NY 10018 212/354-3300 It's best to read the full standard before using it. It also helps to have copies of the related standards "X3.4-1977: American National Standard Code for Information Interchange" (the ASCII standard) and "X3.41.1974: Code-Extension Techniques for Use with the 7-Bit Coded Character Set of American National Standard for Information Interchange." See also the chapter "Using Extended Screens and Keyboard Control" in the IBM PC-DOS manuals (versions 2.0, 2.1, and 3.0), especially for the coding for character attributes. The specification for the DEC VT100 is document EK-VT100-UG-003, available for $13.00 prepaid from: Digital Equipment Corporation Accessories and Supplies Group POB CS-2008 Nashua, NH 03061 (Copyright 1984 BYTE Publications, subsidiary of McGraw-Hill Inc.) (Permission granted to reproduce for noncommercial uses.) v^v^v^v^v^v^v^v^v^v^v^v^v^v^v^v^v^v^v^v^v^v^v^v^v^v^v^v^v^v^v^v^v^v^v^v^v^v ^v^v^v^v^v^v^v^v^v^v^v^v^v^v^v^v^v^v^v^v^v^v^v^v^v^v^v^v^v^v^v^v^v^v^v^v^v^ For more information on programming ANSI or VT-100 Emulations into your ACOS segments, call the Orient GS @ (416) 241-4360 in Toronto Ont. 14.4K USR 24Hrs. Good Luck in you ANSI programming... Pat.. v^v^v^v^v^v^v^v^v^v^v^v^v^v^v^v^v^v^v^v^v^v^v^v^v^v^v^v^v^v^v^v^v^v^v^v^v^v ^v^v^v^v^v^v^v^v^v^v^v^v^v^v^v^v^v^v^v^v^v^v^v^v^v^v^v^v^v^v^v^v^v^v^v^v^v^ now that everyone knows (maybe) how ansi is implemented, let's see some ANSI com programs..... and guyz: Lets make them ROM 3 compatable.......