XTerm2.COM - The next generation Terminal with XModem and Text File Transfer for the Atari/DIP Portfolio. by Jim Straus January 17, 1990 (c) 1990 by Jim Straus All rights reserved Certain portions of the code are (c) 1989 by Atari and DIP. Program in public domain. Not for sale. No warranty is given or implied for this program. In no event shall the author of this work be liable for any direct, indirect, special, incidental, or consequential damages (including lost profit) whether based on warranty, contract, tort, or any other legal theory. This program will only work on the Atari/DIP Portfolio PalmTop computer. It is a simple terminal program for the Serial Interface. It allows files to be sent or received using the XModem protocol. It also allows files to be sent with no translation and files to be captured. To use the program, select serial port parameters from the built-in Setup program. The Initialize! command does not need to be given as the program will attempt to initialize the serial port itself. You may also want to set the External Display to Tracked (80x25). Then start the program by typing: XTerm2 at the DIP-DOS prompt. You will see a greeting, and anything you type is sent out the serial port. F1 may be used to exit the program (Note that the Atari key also generates an F1 key code). If you can't see what you are typing on the Portfolio (most probably, when talking to another local computer), use F0 to enable Echo. If you need to turn Echo off, use F0 again, as it is a toggle. During the session, F2 may be used to start receiving a file using the XModem protocol. You will be prompted for a file name, and then the program will wait for the file to be transferred. Each block successfully received will cause a period to be displayed. When the file is done, "Done" will be displayed and you will be back in the terminal portion. While the program is transferring, the F1 key may be used to abort the transfer. Sending a file is started with the F3 key and proceeds in a similar fashion. If the file was not found, you will just see "Done" displayed. Note that XModem always transfers files in 128 byte blocks, so files will tend to be rounded up to the nearest 128 byte length. When receiving text files, you may also see extra space on the end, depending on whether or not the sending end put in a Control-Z terminating character. XTerm2 does not put in such characters and just pads with zeros. The XModem time out values in this program have not been tested with a packet network (such as that used by Compuserve), but have been adjusted to Compuserve's suggested values. Capturing text is controlled with the SHIFT-F2 key. The first time it is pressed, you will be prompted for a file name. From then on anything received is also saved in the file. To stop capturing, use the SHIFT-F1 key again. It will tell you it is "Done". Text may be captured through XModem transfers and text sending, but only received text that is displayed will be saved in the capture file. SHIFT-F3 is used to send a text file. It prompts for a file name and the file is sent. When the file is done, you will again see "Done". SHIFT-F1 will display the introduction again as help. Also, CTRL-F0 through CTRL-F9 will cause the files "0.XTM" through "9.XTM" to be sent. This can be used to easily send dialing commands, log on sequences and passwords. It does not handle complicated log on procedures, but should simplify your life some. As an added bonus, since these keys look for the files in the current directory, you could create different directories containing different sets of macro keys. Then a simple batch file could take you to the correct directory and start up XTerm2. As an example, say I had a set of macros for Compuserve and had these stored in a directory called CIS. Then a batch file like: c: cd CIS XTerm2 would start up XTerm2 with my CIS macro keys available. As an experimental feature, XTerm2 will also take command line options. The three forms are: XTerm2 -r filename XTerm2 -s filename Xterm2 -h The -r option will enter the XModem receive state, and when it is done receiving the file, the program will exit. The -s option enters the XModem send state. The -h option will display a short summary as a help. The reason for putting these in, was to try and come up with a semi-automatic method to back up the Portfolio through the serial port. In my case, to a Macintosh running the Red Ryder (tm of FreeSoft Inc.) terminal program. On the Portfolio I have a BACKUP.BAT file that looks like: echo RECX filename.txt>aux XTerm2 -s filename.txt with the above lines repeated for each file to be backed up. Red Ryder is left in HOST mode, so the above sequence should automatically send FILENAME.TXT to the Macintosh. A similar process is used to restore the files: echo SENDX filename.txt>aux XTerm2 -r filename.txt The above sequences have not been thoroughly tested. There may still be some timing problems in them (I occasionally hang restoring. It can be alleviated by stopping the transfer on the Macintosh and sending two Control-Xs to cancel that file). This is not considered a final solution, but I thought people might be interested. Others might want to try build scripts to drive other host machine terminal programs too. The length of the file is 2897 bytes (if transfered with XModem it will be 2944 bytes) and the checksum (as determined by CHKSUM.COM) is 99F3.