Jterm

jTerm 0.01 Documentation Written by Captain Bibble File transfer by G.W.Babb Copyright Notice ---------------- This program is FREEWARE and may be used under the following conditions: I retain all rights as author and copyright owner of this software. You are free to distribute this program, but when it is being distributed the entire, complete and unaltered archive supplied must be provided. This includes this text. You may not modify or remove any part of jTerm without my express approval. I accept no responsibility for any loss, financial or otherwise, caused directly or indirectly through use of this software or through use of the advice given by it. Introduction ------------ Although it still needs quite a bit of work on it, jTerm is a comprehensive terminal package for the BBC Micro and Master series of computers. It comprises several terminal types and features, and supports the terminal types VT52, Viewdata, and Wizzo. If running in Sideways Ram, jTerm should be loaded into a spare SRAM socket. If not running in Sideways Ram, then jTerm should be blown onto an EPROM and placed in a spare ROM socket. There is currently no stand-alone version of jTerm, although a stand-alone Wizzo terminal is available which supports Xmodem and 40-column Wizzo *only*. You can obtain this from CCl4, the number is below. If you have any comments, suggestions etc. (or if you just want a copy of the latest version) then I can be contacted on CCl4 Viewdata (0482 798249, all speeds up to v32bis) as "Captain Bibble", or you can email me on the Internet by sending a message to: s.j.rowbottom@dcs.hull.ac.uk Commands -------- jTerm supports the following commands: *TERM (<options>) This enters the terminal emulator *NUMBERS Shows a list of BBs numbers *PLAY <fsp> Plays back a logfile The Terminal Emulator --------------------- To enter the terminal emulator, type '*TERM'. You can also specify command-line arguments to configure the terminal upon startup. These arguments all begin with a dash (-) and are: -L<number> Enter with terminal level <number> These levels are: 0 - VT52 Terminal (Wizzo 0) 1 - Teletext Terminal (Wizzo 1) 2 - Viewdata 3 - Wizzo Level 3 4 - Wizzo Level 4 -R<baud> Set receive speed to <baud>. Baudrates may be 75, 150, 300, 1200, 2400, 4800, 9600, or 19200. -S<baud> Set transmit speed to <baud>. Baudrates are as for the receive parameter. -1<fsp> Create a spoolfile (logfile) called <fsp>, deleting <fsp> if it existed previously. -2<fsp> Append spoolfile <fsp>, create it if it doesn't exist. -V Start emulator in Viewdata mode and disable Wizzo negotiation. -T Start emulator in 80-column terminal and disable Wizzo negotiation. -Q Don't start the terminal, but just show the keypress help-screen. -W Sets jTerm to ignore any attempts at Wizzo negotiation. So for instance: *TERM -R1200-S75-L3-1Log Sets the baudrate to 1200 receive, 75 send, sets the terminal to Wizzo level 3, and creates a spoolfile entitled 'Log'. If the emulator is started without any command line options, then the terminal will be configured to Wizzo level 4, 9600-baud receive, 9600-baud transmit, Wizzo negotiation enabled, and without any spoolfiles open. Keys used while in the Terminal Emulator ---------------------------------------- The following function keys may be used while in the terminal emulator enviroment: f0 Help page Shift+f0 MOS Command f1 Open/close spoolfile 1 Shift+f1 Alter Transmit Speed f2 Open/close spoolfile 2 Shift+f2 Alter Receive Speed f3 Shift+f3 Alter Parity Setting f4 Shift+f4 Alter Wizzo Level f5 Download file(s) Shift+f5 Save Teletext Screen f6 Upload file Shift+f6 f7 Shift+f7 Toggle Wizzo negotiation on/off f8 Show terminal status Shift+f8 f9 Exit emulator Shift+f9 ESCAPE Transmit ESC character (CHR$27) TAB Transmit TAB character (CHR$9) Cursor keys output characters 8, 9, 10, 11, therefore they may be used to move around the screen in message/frame editors, etc. Spoolfiles ---------- The user may have two spoolfiles open at once. Spoolfile 1 is created every time, even if the file already exists then the existing one is deleted. Spoolfile 2 is different in that if it already exists then any data is added onto the end of the file. If spoolfile 2 does not exist then jTerm will create the file. Thus it is possible to have one file which contains the log for just that call, and one file which contains the log for all your calls. Spoolfiles may be played back using *PLAY. Since the spoolfiles are output exactly as they appear, with character codes etc. there are few utilities which will play back these files without substituting character codes (for instance, the Master 128 *TYPE utility modifies control codes with a pipe (|) thus displaying the file incorrectly). *PLAY is provided for this purpose. During display of files, the display may be paused by pressing the spacebar. jTerm will pause at the end of the file and wait for you to press a key. eg. to play a spoolfile called 'thisfile', you would use the command: *PLAY thisfile Downloading and Uploading ------------------------- File transfers protocols supported are: Xmodem, Xmodem crc, Xmodem-1k, Ymodem-batch and Ymodem-batch-g. Xmodem-1k is labelled on some boards as Ymodem. Ymodem-batch and Ymodem-batch-g is labelled Ymodem on some boards as well. If you see Xmodem-1k listed then anything listed Ymodem will be Ymodem-batch. If it says Ymodem but when you try to download using Ymodem-batch the first block you receive is a block 1, revert to Xmodem-1k. Ymodem-batch-g is only suitable for error corrected links (eg. MNP or v42) Ymodem-batch(-g) will transfer groups of files at one time and preserves the file names and file lengths. (Currently, it is only possible to upload one file using Ymodem-batch(-g), this will be rectified in later versions). On boards which support extended headers (eg. ARCbbs, VHost) or when using jTerm on both ends of the link then the load and execution addresses of the file will be preserved. While downloading in Ymodem-batch(-g) you will be offered the chance to change the filename. If you press ESCAPE instead of RETURN to accept the filename, you will no longer be asked if you wish to change the filename of any subsequent files. It is not recommended that these file transfer routines be used with any filing system which does not support block loading (such as Acorn's DFS 0.90 which does a very slow byte-by-byte load instead), unless you are sure that all the download will fit into memory. It's best to use it with ADFS/Econet/DFS 1.2 onwards really. Wizzo ----- Wizzo is a new terminal type which is becoming increasingly more and more used since it allows much faster communication, a rudimentary form of compression, and true 8-bit file transfer. Wizzo offers a number of terminals, the first 3 (0 to 2) being normal terminal types, above 2 and things get more away from a "recognised" terminal type. When jTerm automatically changes to another Wizzo level (such as from 40-column to 80-column) a small message will be displayed at the bottom of the screen signalling a change in level. The terminals are numbered as such: 0 - Scrolling Terminal (80 column) 1 - Teletext (BBC mode 7) 2 - Standard Viewdata 3 - Basic Wizzo 4 - Level 3 with compression Currently all Wizzo terminals are based on a Viewdata displayable screen, though it could be used on a Teletext screen, the host assumes the screen *might* scroll if it moves off the top/bottom of the screen. It allows assumes normal ASCII codes for _# and not the Viewdata mapping, double height is assumed to take 2 lines and not the Viewdata 1. All levels except 2 (Viewdata) are 8N1, so 'proper' file transfer can take place and features of the Wizzo levels can be used fully. Wizzo levels are based on Teletext with some features of Viewdata, as the link is 8 bit no escape codes are used and the proper teletext attribute codes are sent. Future improvements ------------------- Dial store facility Command to allow direct talking to serial port ANSI/VT100/VT220 in 80-column scrolling mode CET file transfer in Viewdata Built-in message packet reader Viewdata frame upload as ESC codes Wizzo Level 5 with sound Wildcarded batch upload Configurable download/upload path for net/hard disk users Improved cache implementation for file transfer Use of 2nd processor/shadow memory if available Call costing utility Terminal Emulation (c)1994 Captain Bibble File Transfer (c)1992 Gareth Babb. Wizzo documentation reproduced from the freely available Wizzo-4 specification.