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ELSEWARE - PC DOS REMOTE ACCESS - (C)1989 by Kevin Kiley Release 2.1 - July 19, 1989 INTERLINK TECHNOLOGIES P.O. BOX 49646 SARASOTA, FLA. 34230-6646 =================================================================== SECTIONS CONTAINED IN THIS DOCUMENTATION FILE =================================================================== 1. INTRODUCTION 2. WHAT YOU NEED TO USE ELSEWARE 3. INSTALLING THE SOFTWARE 4. HOW TO USE THE HOST PROGRAM EWH.EXE 5. HOW TO USE THE REMOTE ACCESS PROGRAM EWR.EXE 6. A WORD ABOUT THE WAY THINGS WORK 7. OTHER PROGRAMS AVAILABLE FROM INTERLINK TECHNOLOGIES 8. PRODUCT ORDER FORM =================================================================== ELSEWARE is FREEWARE. You may copy and distribute this program freely and without reservation. This software has been formally released in the PUBLIC DOMAIN. I hope you find it as useful as I have. Kevin Kiley AUTHOR and PRESIDENT of INTERLINK TECHNOLOGIES =================================================================== INTRODUCTION =================================================================== WHAT IS 'ELSEWARE'? ELSEWARE is a set of programs which will allow you to use your PC from anywhere. ELSEWARE is identical to commercially available software which makes the same claim with one important exception... ELSEWARE is free. One of my responsibilities is to write and support voice response and recognition software. Most of the systems are on the other side of the country and finding the right remote access software was very important to me. What I discovered is that all the programs available commercially which allow you to use a PC from remote take up too much memory and are too sluggish. Some of my voice response systems would not leave enough DOS CORE memory to allow any of the commercial programs to load. There is also a general lack of ability to control the time slicing with any of the commercial programs and this is something I had to have in order to support certain voice response systems remotely. So I wrote my own and have used it successfully ever since. The EWH.EXE host module requires ONLY 8K ( 8000 bytes! ) and is as fast if not FASTER than any commercial remote access software I have tried. If you are looking for fancy help screens and setup screens then you can wait for a new release of ELSEWARE. This release is the version I have been using for quite some time and it includes only what's necessary to get the job done. That's all I need and I am assuming there are others out there who have the same minimum requirements. ELSEWARE is FREEWARE, not SHAREWARE. You can copy and distribute it as freely as you like. No strings attached. It has served me well and I hope it will do the same for you. PRINTING THIS DOCUMENTATION This documentation is in plain ASCII format and contains FORM FEED characters. Just use 'COPY EW.DOC PRN' to send the documentation to the printer. The files should end up on paper properly paginated and ready to be punched with holes on the left. FILES Release 2.1 contains the following files... Filename.ext Bytes Description ------------ ------ ----------------------------------------------- README 2585 The file you are reading right now EWHOST BAT 753 Batch file to run the HOST program EWH EXE 8164 The HOST program itself (TSR) EWREM BAT 784 Batch file to run the REMOTE ACCESS program EWR EXE 16298 The REMOTE ACCESS program itself (TSR) EW DOC 33189 ELSEWARE documentation EWTITLE EXE 4594 Title screen EWORDER FRM 1929 Extra copy of INTERLINK TECHNOLOGIES order form =================================================================== WHAT YOU NEED TO USE ELSEWARE =================================================================== OPERATING SYSTEM - DOS 3.1 or higher COMMUNICATIONS HARDWARE - At least 1 standard PC serial port in both HOST and REMOTE. - 1 AUTO-ANSWER ASYNC modem for HOST ( Doesn't have to be HAYES type ). - 1 ASYNC MODEM for REMOTE ( Doesn't have to be HAYES type ). <OR> - Standard NULL-MODEM connection between 2 PC's. =================================================================== INSTALLING THE SOFTWARE =================================================================== Here's the recommended way to install the software... UN-ARCHIVE the programs if you've received them in .ARC format. Create a SUB-DIRECTORY off of your ROOT directory called 'EW'. Copy all the programs to the new sub-directory. Add the new subdirectory to your PATH and/or ENVIRONMENT. Change to the sub-directory whenever you want to start either the HOST or REMOTE software and execute the appropriate BATCH file. (EWHOST.BAT) for HOST program or (EWREM.BAT) for remote. That's it! =================================================================== HOW TO USE THE HOST PROGRAM EWH.EXE - (c)1989 Kevin Kiley =================================================================== GETTING THE MODEM READY TO ANSWER THE PHONE ELSEWARE was written to occupy a minimal amount of memory. It was also written to be used with NON-HAYES compatible modems ( There are still MANY around! ). It is for both of these reasons that this version of ELSEWARE contains no HAYES specific initialization routines. This version makes no attempt to set the modem to AUTO ANSWER. It assumes this has already been done when it comes alive. If you DO have a HAYES type modem then the ease with which you can set it to AUTO ANSWER negates the need for routines in the software. Here are 2 of the simplest ways to do this... 1. Just throw the HAYES DIP switch that makes the modem answer the phone when it's ringing. This is the way I do it. Simple and easy. 2. If you have a HAYES clone that doesn't have the DIP switches then you can use a MODE command to set the port parameters and then use a DOS 'COPY' command to send the AUTO-ANSWER init string to the modem. These DOS commands can be included in the batch file used to start the HOST program and you'll never need to worry about them again once they are correct. Use the MODE command to intialize the port to the PROTOCOL you're using or the modem string you are about to send won't be recognized by the modem. HINT: Put the HAYES 'AT' command which sets AUTO ANSWER ON into a text file and then use a COPY FILENAME.EXT COM1: command to send the string to the modem. Works every time. Don't forget to have a CARRIAGE RETURN in the file at the end of the modem initialization string. STARTING THE HOST PROGRAM The HOST program EWH.EXE is the one you need to run on the computer you are attempting to access from remote. This program is a TSR requiring only 8K for the .EXE load module and will remain invisible as long as it's loaded. Once loaded... EWH.EXE monitors the PC and the MODEM and will allow the PC to be used from remote once it senses an incoming caller. You can always use the PC normally when EWH.EXE is loaded but be advised that if someone is using the system from remote then they can see what you do and you can see what they do but BOTH parties have equal control of the PC and the keyboard. This is actually one of the reasons for using remote software like this... so you can conduct real-time training sessions from remote. ELSEWARE will perform just fine if used this way. There are a number of command line parameters required to to run the HOST program. A special BATCH file is provided called EWHOST.BAT which will perform the load for you. You can load EWH.EXE yourself as long as you supply all the required parameters. The batch file EWHOST.BAT looks like this... ECHO OFF REM EWHOST.BAT Load EW host program EWTITLE REM ----------------------------------------------------------- REM EWH IRQ PORT BAUD PARITY DATABITS STOPBITS DOATTRIBUTES? REM ----------------------------------------------------------- REM EWH = HOST program - main module REM IRQ = Decimal value of software interrupt to use REM PORT = Communications port to use (1 or 2) REM BAUD = Baud rate (300-9600) REM PARITY = Parity value (E)ven (O)dd (N)one REM DATABITS = Data bits value (7 or 8) REM STOPBITS = Stop bits value (1 or 2) REM DOATTRIBUTES = Send attribute bytes to remote? (1=YES 0=NO) REM ----------------------------------------------------------- EWH 96 1 2400 N 8 1 1 Please read the following before attempting to change any of the parameters... IRQ - This is the decimal value of the software interrupt vector to use for the TSR. The default is IRQ 60 HEX (96 DEC). This should be clear on most systems. If you have any other TSR's using IRQ 60 HEX then change this value to something unused and things should work fine. Remember to supply the DECIMAL value of the unused interrupt vector. PORT - Set this to '1' to use COM1 or '2' to use COM2. BAUD - The DECIMAL value of the BAUD RATE to use. Any remote PC accessing the HOST PC must use the same baud rate specified here. PARITY - Although you MAY supply a LETTER (E,O,N) to specify PARITY results will be unpredictable if anything but 'N' (NO PARITY) is specified. The data exchanged contains 8 bit characters. DATABITS - You can enter something other than 8 but here again... the binary data exchanged requires an 8 bit word length for things to work correctly. STOPBITS - Same. Changeable but needs to be 1. DOATTRIBUTES - You may instruct the HOST program to NEVER send screen attributes. This can speed things up if you are using the remote access software with mono monitors or programs that use few screen attributes. The NORMAL setting is to send both screen TEXT AND ATTRIBUTE bytes. Set this parameter to 1 to include both TEXT and ATTRIBUTE bytes in video update messages. Set this parameter to 0 to send only TEXT. ELSEWARE will NOT transmit GRAPHICS screens! Future release(s) may include this capability. You may EDIT/CHANGE any of the parameters at any time prior to loading the TSR. Use a standard ASCII text editor to do this or anything you normally use to CREATE/EDIT your batch files. Be sure you are in the sub-directory where the ELSEWARE remote programs are located and enter 'EWHOST' to initiate the load. If there are any parameters missing from the command line when you load EWH.EXE then the operation will abort and you'll be told that there are 'Not enough command line parameters.' Check EWHOST.BAT if this message appears. You may have erased a parameter by mistake while changing one of the values. Once the title screen appears and tells you the load has been successful then it is OK for a remote user to connect with the MODEM and start using the PC with the remote access part of ELSEWARE. There is no HOT-KEY screen in the HOST program. It simply installs itself in memory and does its job of allowing a remote caller to use the PC. TERMINATING THE HOST SOFTWARE Change to the sub-directory containing EWH.EXE. Enter the DOS COMMAND 'EWH T'. This will instruct the EWH.EXE TSR to remove itself from memory. If no TSR's were loaded after EWH.EXE then the memory used by EWH.EXE will be returned to the CORE MEMORY pool. Run EWHOST.BAT again to re-load the program. If any TSR's were loaded AFTER EWH.EXE then it will only be able to SUSPEND itself. The small amount of memory required by EWH.EXE will NOT be freed up. You CAN use any of the popular TSR managers to pull EWH.EXE out of memory. Just remember to set a marker before loading EWH.EXE and use a FLUSH program to pull it out. OTHER MODEM PROGRAMS Do NOT run any other MODEM programs on top of EWH.EXE unless you are sure the program doesn't interfere with the serial communications port required by EWH.EXE. PROCOMM is NOT SAFE. It alters the settings for BOTH COM PORTS regardless of their state prior to running PROCOMM. See the PRODUCT LISTING and the ORDER FORM EWORDER.FRM to see how to get a MODEM PROGRAM that's fully compatible with ELSEWARE. There IS a modem program available on the order form which can be used on the HOST system by the remote caller to place a THIRD call to another system. This allows the ELSEWARE caller to make calls from the HOST computer as if he/she were there at the HOST computer. Phone charges will go to the location of the HOST PC, NOT the REMOTE. =================================================================== HOW TO USE THE REMOTE ACCESS PROGRAM EWR.EXE (c)1989 Kevin Kiley =================================================================== You must use the special remote program provided (EWR.EXE) to access the PC running the HOST software (EWH.EXE). This program is a TSR just like the HOST program EWH.EXE. There is a special BATCH FILE called EWREM.BAT which should be used to start the remote access program. It is described in greater detail below following the section regarding linking up with the HOST computer. LINKING UP WITH THE HOST COMPUTER ELSEWARE was developed to be used with ALL types of modems and not just the HAYES type. There are NO routines in the software to initiate a dial-up to the HOST COMPUTER. If you DO have a pair of HAYES modems then the ease with which the link can be accomplished eliminates the need for such routines. LINKUP USING PC MODEM SOFTWARE You can use just about any modem program you like with one requirement... after you have placed the call and connected with the HOST system you must be able to EXIT TO DOS without dropping CARRIER. PROCOMM does this quite nicely and just about everyone has it. You can use the dial directory for the easiest connection. Be sure to say 'NO' when you go to exit to DOS and PROCOMM asks you if you want to 'HANGUP LINE?'. Once you have exited to DOS you can execute EWREM.BAT and load the REMOTE ACCESS program. If the HOST module is up and running on the other computer and you have not dropped carrier then you'll be in business as soon as you press ALT '.' and call up the REMOTE ACCESS HOTSCREEN. LINKUP FROM DOS You can also link to the remote quite easily using the DOS 'MODE' command and a few 'COPY CON COM1:' commands. Use the MODE command and set the port protocol. Once set correctly... Any 'COPY CON COM1:' commands will send the strings you enter right to the modem. Use the standard HAYES 'ATDT???-????' string to initiate the dial and wait for a connection. Once the 'CARRIER DETECT' light is up on your HAYES or you HEAR the connection established over the speaker you're reasy to run EWREM.BAT and begin accessing the HOST computer. OTHER There are also plenty of other straight dial/connect programs available for HAYES type modems. Any one should do the trick provided it does NOT drop CARRIER once it is established. If you have a DATA/TALK type ASYNC modem that is NOT HAYES compatible then you can still use ELSEWARE! Just intiate your handset call in the usual way and once you've thrown over from TALK to DATA and CARRIER is up you can load the REMOTE software and begin using the HOST COMPUTER. If you are using high-speed SYNC modems with ASYNC protocol converters and they work properly with other DOS communications programs then ELSEWARE should work just fine also. Be advised, however, that I haven't tested the software at speeds faster than 19.2K BAUD. STARTING THE REMOTE ACCESS SOFTWARE The REMOTE ACCESS part of ELSEWARE is the program you need to run to access the HOST computer running EWH.EXE. There are a number of COMMAND LINE PARAMETERS required to run the REMOTE program. A special BATCH file is provided called EWREM.BAT which will perform the load for you. You can load EWR.EXE yourself as long as you supply all the required parameters. The batch file EWREM.BAT looks like this... ECHO OFF REM EWREM.BAT Load EW remote access module EWTITLE REM --------------------------------------------------------- REM EWR IRQ PORT BAUD PARITY DATABITS STOPBITS POLLFOCUS REM --------------------------------------------------------- REM EWR = Remote program - main module REM IRQ = Decimal value of software interrupt to use REM PORT = Communications port to use (1 or 2) REM BAUD = Baud rate (300-9600) REM PARITY = Parity value (E)ven (O)dd (N)one REM DATABITS = Data bits value (7 or 8) REM STOPBITS = Stop bits value (1 or 2) REM POLLFOCUS = How often to POLL HOST (1/18 sec increments) REM --------------------------------------------------------- EWR 96 1 2400 N 8 1 18 Please read the following before attempting to change any of the parameters... IRQ - This is the decimal value of the software interrupt vector to use for the TSR. The default is IRQ 60 HEX (96 DEC). This should be clear on most systems. If you have any other TSR's using IRQ 60 HEX then change this value to something unused and things should work fine. Remember to supply the DECIMAL value of the unused interrupt vector. PORT - Set this to '1' to use COM1 or '2' to use COM2. BAUD - The DECIMAL value of the BAUD RATE to use. This must match the BAUD rate specified for the HOST program you intend to access. Valid BAUD rates are 300-9600. PARITY - Although you MAY supply a LETTER (E,O,N) to specify PARITY results will be unpredictable if anything but 'N' (NO PARITY) is specified. The data exchanged contains 8 bit characters. DATABITS - You can enter something other than 8 but here again... the binary data exchanged requires an 8 bit word length for things to work correctly. STOPBITS - Same. Changeable but needs to be 1. POLLFOCUS - The REMOTE program uses a POLLING scheme to request video updates from the HOST computer being accessed. The value specified here is the number of timer ticks to wait bewtween POLL attempts. PC's generate a clock interrupt approximately 18.2 times a second and one of these interrupts is known as a 'timer tick'. If the value specified is '18' then the REMOTE program will pause approximately 1 second before re-polling the HOST computer for another video update. Never set the polling pause to anything faster than about 2 timer ticks or the HOST may become so busy sending you screen updates that it won't be able to process the last command in a timely way. The PAUSE is intended to allow slower systems some breathing room. A FAST HOST PC can handle short pause values. A value of 9 timer ticks should provide good performance on all types of PC's. You may also adjust this value to whatever you need to access systems where interrupt activity is higher than normal. I use this feature quite often to support voice response systems which need more processor time than any commercial remote software can provide. You may EDIT/CHANGE any of the parameters at any time prior to loading the TSR. Use a standard ASCII text editor to do this or anything you normally use to CREATE/EDIT your batch files. Be sure you are in the sub-directory where the ELSEWARE remote programs are located and enter 'EWREM' to initiate the load. If there are any parameters missing from the command line when you load EWR.EXE then the operation will abort and you'll be told that there are 'Not enough command line parameters.' Check EWREM.BAT if you see this message. You may have erased a parameter by mistake while changing one of the values. Once the title screen appears and tells you the load has been successful then all you need to do to start using the HOST computer is hold down the ALT key and press '.' (period). ( You must already be connected before you press the HOTKEY ) ( or nothing will happen! ) The remote portion of ELSEWARE is a TSR. You can stay in your own DOS and simply switch to the HOST computer's DOS at any time with the ALT-'.' HOTKEY. ALT-'.' is the HOTKEY SEQUENCE which brings up the REMOTE ACCESS SCREEN on top of the current DOS task. ALT-X is the KEY SEQUENCE which will EXIT the REMOTE ACCESS SCREEN and return you to your own local DOS. TERMINATING THE REMOTE SOFTWARE Change to the sub-directory containing EWR.EXE. Enter the DOS COMMAND 'EWR T'. This will instruct the EWR.EXE TSR to remove itself from memory. If no TSR's were loaded after EWR.EXE then the memory used by EWR.EXE will be returned to the CORE MEMORY pool. Run EWREM.BAT again to re-load the program. If any TSR's were loaded AFTER EWR.EXE then it will only be able to SUSPEND itself. The small amount of memory required by EWR.EXE will NOT be freed up. You CAN use any of the popular TSR managers to pull EWR.EXE out of memory. Just remember to set a marker before loading EWR.EXE and use a FLUSH program to pull it out. OTHER MODEM PROGRAMS Do NOT run any other MODEM programs on top of EWR.EXE unless you are sure the program doesn't interfere with the serial communications port required by EWR.EXE. PROCOMM is NOT SAFE. It alters the settings for BOTH COM PORTS regardless of their state prior to running PROCOMM. PROCOMM can be used to establish the intial connection but should not be run after EWR.EXE is loaded and you are using the remote PC. See the PRODUCT LISTING and the ORDER FORM EWORDER.FRM to see how to get a MODEM PROGRAM that's fully compatible with ELSEWARE. =================================================================== A WORD ABOUT THE WAY THINGS WORK =================================================================== Once you have pressed ALT-'.' to call up the REMOTE ACCESS SCREEN the software will notify you that it is requesting a 'session update' from the HOST COMPUTER. It is necessary to obtain a complete session update (including a new video screen) each time you re-enter the HOTKEY terminal screen since things may have changed on the HOST computer since your last access. This only takes a moment or two and you will then see the latest screen from the HOST on your own screen. From this point on you are using the HOST computer as if you were sitting in front of it. There are a few things to keep in mind while using the HOST computer... - Keyboard echo will NOT be instant as it is when you are using your own DOS. Whether or not the delay is noticeable depends on the SPEED of the HOST COMPUTER and the SPEED of the connection (BAUD RATE). Once you realize that no keys will be lost you will find yourself typing ahead without noticing any echo delay. - DOS commands that SCROLL the screen rapidly will not appear as they do when executed locally. The screen(s) can only be sent so fast and the scrolling will appear to be 'frozen' at different points along the way. Programs like this are at their best when dealing with 'FRAME' oriented screen updates. These will appear perfectly normal. - Some remote access programs update the video while the message is coming in. These give a 'watery' look to all video updates as the new screens appear to 'wash' over the old ones. ELSEWARE uses a different approach. The video will be updated instantly at the END of the video update message. What this means is that it may APPEAR to be taking longer to see screen changes but this is not the case. The new screen is being assembled IN MEMORY and will appear instantly when completed to avoid the 'watery' look. WHAT SOFTWARE WORKS WITH ELSEWARE?? Everything I've tried except for a 4 year old version of PC-WRITE. Even it works just fine except for the PAGE UP/DOWN commands. That old version is doing something unknown with the keyboard scan codes when using the SHIFT keys and the numeric keypad. Newer versions of PC-WRITE appear to be OK. I've tried dozens of word procesors including WORDSTAR 2000 and EDWIN. They all appear to work just fine from remote. These are the 2 I use most often when editing and re-compiling 'C' source code from remote. ALL 'C' compilers I have tested work just fine from REMOTE. BASICA and GWBASIC also work A-OK from remote. SPREADSHEETS and DATABASE applications have tested just fine, also. The only software which is KNOWN to not operate properly when used from remote is, of course, other serial communications programs run on the HOST while accessing it from remote. Most of these will take over the interrupts needed to keep the remote access going. There IS a modem program which I have written which will get along with ELSEWARE perfectly... even when run on the HOST while accessing it remotely. See the PRODUCT LISTING for details on obtaining it if you think you need it. I would appreciate hearing from anyone who finds a piece of software which will NOT work. The product is evolving and future releases are currently being worked on. If there is a piece of software which is not currently supported then I would like to solve whatever problem there is with it and include those changes in upcoming releases of ELSEWARE. Send a letter describing the problem to the address listed at the top of this documentation. Please include your phone number and you will almost certainly hear from me. ACCESS INDICATOR FOR REMOTE PROGRAM Since the REMOTE program is a TSR and you can switch from your LOCAL DOS to the HOST machine's DOS it's necessary to be able to tell where you are! When the REMOTE TSR is loaded there will always be a single character indicator in the upper right hand corner to tell you where you which DOS you're actually using. Highlighted 'L' - means you are using your 'L'OCAL DOS. Press ALT-'.' to switch to the HOST computer. Highlighted 'R' - means you are using the 'R'EMOTE HOST DOS. Press ALT-X to return to your LOCAL DOS. When you enter 'EWR T' and TERMINATE the REMOTE ACCESS program then the indicator will disappear the next time the screen is cleared. =================================================================== OTHER PROGRAMS AVAILABLE FROM INTERLINK TECHNOLOGIES =================================================================== 1. ELSEWARE REGISTRATION If you REGISTER your copy of ELSEWARE then I can send you a printed, BOUND manual and you will receive updated versions automatically, free of charge. The product is evolving so please register your copy if you want to receive updated versions as soon as they are available. I regret to say that this will also be the only way I can provide technical SUPPORT for the program at this time. I won't be able to help you with any problems you might be experiencing unless you have registered your copy. $20.00 2. ELSEWARE FILE TRANSFER MODULES Transfer files using XMODEM and YMODEM between 2 systems running any version of ELSEWARE $35.00 Purchase of the file transfer module(s) automatically includes the registration fee if you are not registered already. 3. AUTOMATIC FILE TRANSFER If you have ELSEWARE and the FILE TRANSFER modules then this utility allows you to intiate unattended file transfers at pre-determined times. $10.00 4. MODEM PROGRAM FOR ELSEWARE HOST MODULE If you have 2 modems on your ELSEWARE HOST then this SPECIAL MODEM program will allow you to make ANOTHER phone call to a third remote system after you dial into ELSEWARE. This is great for accessing remote bulletin boards and downloading directly to the PC at the office. Keep business related phone bills coming to the office... not your house! $30.00 5. COMPLETE SOURCE CODE FOR ELSEWARE Written using TURBO 'C' but easily adapted for any number of other 'C' compilers. Will compile straight away using Microsoft 'C'. $90.00 PRINT THE ORDER FORM CALLED EWORDER.FRM AND FOLLOW THE INSTRUCTIONS ON THE FORM TO ORDER ANY OF THESE PRODUCTS. A COPY OF THE ORDER FORM IS INCLUDED IN THIS DOCUMENT. ============================================================== INTERLINK TECHNOLOGIES - PRODUCT ORDER FORM ============================================================== PRODUCT EACH QTY TOTAL -------------------------------------- -------- ----- ------ 1. ELSEWARE REGISTRATION $ 20.00 -------------------------------------- -------- ----- ------ 2. ELSEWARE FILE TRANSFER MODULES $ 35.00 -------------------------------------- -------- ----- ------ 3. AUTOMATIC FILE TRANSFER $ 10.00 -------------------------------------- -------- ----- ------ 4. MODEM PROGRAM FOR ELSEWARE HOST MODULE $ 30.00 -------------------------------------- -------- ----- ------ 5. COMPLETE SOURCE CODE FOR ELSEWARE $ 90.00 -------------------------------------- -------- ----- ------ TOTALS> SHIP TO: ___________________________________________________ ___________________________________________________ ___________________________________________________ ___________________________________________________ ___________________________________________________ YOUR PHONE: ________________________________________________ ________________________________________________ SPECIFY DISK FORMAT REQUIRED: ______________________________ Only cash, money order or personal check can be accepted. Makes all checks or money orders payable to Kevin Kiley. Mail order form and payment to: INTERLINK TECHNOLOGIES P.O. BOX 49646 SARASOTA, FLA. 34230-6646