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- SOME NOTES ON MEX FILES
- by Irv Block
-
- Richard Holmes has suggested that a listing of my MEX files
- with an explanation of how they work might be useful to others
- picking their way through Ron Fowler's marvelously programmable
- communications package, MEX. So here goes...
-
- What is so extraordinary about MEX is its ability to edit
- and tailor itself to the user's particular needs. One of the
- features that demonstrate this capacity is the way MEX uses
- ***.mex files. MEX will read any FILENAME.MEX as a "SUBMIT"
- file and execute the lines as commands; and it can do this
- either at your manual direction or automatically.
-
- You can tell MEX to read a FILENAME.MEX file by typing on
- the MEX command prompt A0>>READ FILENAME (you can eliminate
- the .ext, since the program assumes the .ext to be .MEX)
-
- Or, even better, you can eliminate the "READ" instruction
- and have MEX assume that any name it doesn't recognize as a
- built-in command is the name of a .MEX file and should be read
- and performed. Thus, simply typing A0>>FILENAME <cr, of
- course> will dispatch MEX on its obedient course. This makes
- for very fast and fluid performance of a lot of tasks to make
- communications easier and quicker.
-
- The way you program MEX to do its "automatic read" number is
- with a STAT command:
-
- A0>>STAT EXTEND ON
- A0>>CLONE NEWMEX.COM (or any other name, even
- the same)
-
- The clone is now ready to do your bidding, and the following
- description of my .MEX files (probably crude to some of you)
- will give some idea of what this program can do. They can all
- be extended and improved.
-
- -----------------
-
- INI.MEX
-
- INI.MEX is the .MEX file MEX automatically looks for on
- starting up, whether you tell it to or not. You can disable
- this feature with "STAT INITFILE OFF" but you'd be making a
- mistake. Use it. My INI.MEX, written with a text editor (I
- keep the economical TED.COM on the same disk to facilitate
- instant writing and editing of .MEX files) goes like this:
-
- LOAD KEYS.KEY
- LOAD PHONE.PHN
- B:^M
- TYPE A:T.NOT
-
- [NOTE: YOU CAN ALSO WRITE THESE
- COMMANDS ON A SINGLE LINE, SEPARATED BY
- SEMICOLONS. BUT GIVING EACH COMMAND
- ITS OWN LINE, I THINK, MAKES IT EASIER
- EDIT THE FILE LATER]
-
- On automatically reading this file, then, MEX will perform
- the following tasks before getting itself ready to receive your
- further commands:
-
- 1) It will load KEYS.KEY, the file that contains my
- keystrings (First Name, Last Name, Passwords, Logoff,
- etc.) These keystrings, of course, can be written into
- the file either with a text editor or with MEX itself.
- Type HELP KEY for full instructions. By using MEX's
- "SAVE KEYS.KEY" command you can write your keystrings
- and updates to a file. You can "CLONE" the
- keystrings, too, but that occupies space in MEX and
- makes it necessary for you to redo the process each
- time you make a new clone. By having your strings in
- a KEYS.KEY file and having MEX automatically load it,
- you can maintain and edit your set of keystrings
- independently.
-
- 2) Mex will then load your PHONE.PHN, your library of
- phone numbers that you 'SAVE'ed. (SEE HELP PHONE). All
- the points made above with reference to keystrings
- apply equally to this file.
-
- 3) On reading the third line, MEX will log you onto
- Drive B, where I assume your uploading disk will be.
- My A drive, containing the disk with MEX and assorted
- associated goodies for editing and managing uploaded
- and download material, is pretty full. Forgetting where
- I'm logged and trying to upload a long file on Drive A
- by error can be a disgusting experience.
-
- 4) Finally, reading the last line, MEX will type out my
- file T.NOT. That file reads like this:
-
- *****************************************
- IRV, REMEMBER TO SET UP A 'CAPTURE' FILE!
- *****************************************
-
- And that is what pops up on my screen (all in the space
- of a second or two -- MEX is fast) after bringing up
- MEX. For me, it's a good reminder. I have a habit of
- remembering to set up a capture file only after what I
- want to copy has already scrolled by on its way north.
-
- ---------------
-
- GET.MEX
-
- GET.MEX reads like this:
-
- WRT
- SENDOUT "XMODEM S {1}
- RT {1}
-
- If I type "GET ANYFILE" <cr> on the MEX command line, MEX
- will first WRT the capture file, if there is one, to the disk.
- (If you don't WRT the capture file before R or S, you'll lose
- it) It will then send "XMODEM S ANYFILE" to the host, wait for
- a reply and then go into MEX's command mode to give the order
- "RT ANYFILE" When the transfer it completed I'll be left in
- the Terminal mode, which in this case is where I want to be.
-
- ALL THIS UNATTENDED, WHILE YOU FILE YOUR NAILS
- OR GO FOR COFFEE. MAIN ADVANTAGE IS ACCURACY, THOUGH,
- AND SPEED IN TRANSFERING.
-
- ---------------
-
- GETBYE.MEX
-
- My GETBYE.MEX goes like this:
-
- WRT
- SENDOUT "XMODEM S {1}
- R {1}
- SENDOUT "BYE ^M"
-
- Invoked by "GETBYE ANYFILE.TYP" this will do the same as GET.MEX
- but go to the command mode after the transfer in order to send
- the "BYE" command (you can't send sendout commands in anything
- but the command mode--it took me some frustrating hours to
- realize this). In other words, it automatically logs off.
-
- ---------------
-
- GETLIB.MEX
-
- This one reads as follows:
-
- WRT
- SENDOUT "XMODEM L {1} {2}
- RT {2}
-
-
- Invoked by GETLIB ANYFILE THISFILE.DOC, it will download the
- member THISFILE.DOC from ANYFILE.LBR.
-
- ---------------
-
- SEND.MEX
-
- SEND.MEX is just like GET.MEX except that the R's and S's
- are transposed, since the purpose of "SEND ANYFILE.TYP" is to
- send a file to the host rather than receive one.
-
- ---------------
-
- Q.MEX is invoked simply by typing "Q" <cr> at the command line.
- It reads like this:
-
- STAT REPLY 0
- SENDOUT "ATM0^M"
- STAT REPLY 8
-
- The critical instruction is the second line, which instructs
- the Smartmodem to shut down its speaker. Nice when lines are
- busy and you are going into continuous redialing. The first
- and third lines of this file shut off the echoing and waiting
- in this process, making it virtually instantaneous and neat --
- but restore the normal parameters at completion of the order.
-
- ---------------
-
- Z.MEX is just like Q.MEX except that the second line reads
-
- SENDOUT "ATZ^M"
-
- restoring the Smartmodem to its normal chatty mode.
-
- ---------------
-
- ADDENDUM:
-
- Two other STAT adjustments will make all the above operate more
- smoothly. CLONE these into your version of MEX -- or include
- them in your INI.MEX file.
-
- STAT SEARCH 2
- ALT A0
-
- The first of these, STAT SEARCH 2, sets up a search path that
- orders MEX to look first on the default drive for .MEX files
- you indicate and then, failing to find them there, to search
- the "Alternate" drive.
-
- The second command sets the alternate drive to be A0, which is
- right for me, since I am usually logged on B. Depending on
- your system, ALT could be anything. The combination thus
- searches both drives, relieving you of the bother of
- remembering which file is on which drive--a kind of internal
- ZCPR.
-
- I do hope this exercise will turn out to be useful, perhaps
- instigate an exchange of more imaginative .MEX files. Mex is
- dynamically programmable and there may be as many different
- ways of programming it as there are users.
-
- - Irv Block
- Sea Cliff, NY
- June 7, 1984