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The PC-SIG Library 9
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The PC-SIG Library on CD ROM - Ninth Edition.iso
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DISK0843
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OMEGAEXT.DOC
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1988-11-23
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The Omega-Link External protocol handler comes to you preconfigured
for several popular external protocols. If you wish to add other
protocols or modify the existing ones, see the section on installing
protocols.
INSTALLING THE EXTERNAL PROTOCOL HANDLER
You will need to make the files OMEGAEXT.EXE and OMEGAEXT.DAT
available to Omega-Link. To do this you must copy them into either
the current directory or a directory that is listed in the DOS PATH
command. The file OMEGAEXT.EXE will usally be placed in the same
directory as OMEGA.EXE, and OMEGAEXT.DAT will be placed in the
download sub-directory.
The external protocol files will also need to be located so that the
external protocol handler can find them. This will usally be in the
same directory as OMEGAEXT.EXE. You may also edit the protocol
descriptions to tell the external protocol handler where to find the
external protocols if they won't be current directory. A description
of this process appears in the section on installing additional
protocols.
Recommended configurations
If you have only one floppy diskette drive and no harddisk drive.
-----------------------------------------------------------------
PATH=
COMSPEC=\COMMAND.COM
Program disk Data disk
------------ ---------
OMEGA.EXE External protocols (.EXE and .COM)
OMEGADIR.DAT downloaded files
OMEGADEF.DAT
OMEGAFUN.DAT
OMEGAALT.DAT
OMEGAEXT.EXE
OMEGAEXT.DAT
COMMAND.COM
When the external protocol handler asks for the protocol to use
remove the program disk and insert the data disk. As soon as the
download or upload is completed reinsert the program disk. Please
note that due to the small amount of disk space that Omega-Link
requires, it may be possible to have everything on one disk and still
have quite a bit of space for downloads. This is especially true of
3-1/2" 720k or 1.44 meg floppy diskette systems. For this type of
system you may wish to simply copy all of the files onto program
diskette.
For Two floppy diskette systems.
--------------------------------
PATH=B:\
COMSPEC=A:\COMMAND.COM
DISKETTE IN DRIVE A: DISKETTE IN DRIVE B:
-------------------- --------------------
COMMAND.COM OMEGAEXT.DAT
OMEGA.EXE downloaded files
OMEGAEXT.EXE
OMEGADIR.DAT
OMEGAFUN.DAT
OMEGAALT.DAT
OMEGADEF.DAT
External protocols
This configuration will give you the largest amount of space for
downloaded files, however, it does require you to copy the file
OMEGAEXT.DAT to each new diskette that you wish to use for downloads
or uploads. Therefore, you may wish to copy all the files onto you
program diskette and then modify OMEGAEXT.DAT to use drive B:.
For Harddisk systems.
---------------------
PATH=C:\;C:\OMEGA;C:\FILES
COMSPEC=C:\COMMAND.COM (or whatever is needed to find command.com)
Directory C:\OMEGA Directory C:\FILES
------------------ ------------------
OMEGA.EXE OMEGAEXT.DAT
OMEGAEXT.EXE downloaded files
OMEGADIR.DAT
OMEGADEF.DAT
OMEGAFUN.DAT
OMEGAALT.DAT
External protocols
---------------------------------------------------------------------
The following protocols have been preconfigured into the external
protocol handler: DSZ (Zmodem, Ymodem-batch, and Ymodem-G), MLINK16
(Megalink), PCKERMIT (Kermit), and CISB (Compuserve "B"). Our thanks
go to the authors of these programs. Most of these programs may be
downloaded from almost any BBS that has MS-DOS files. We have not
included any of these files to prevent violating there copyrights and
to prevent you from having to download the same file twice.
---------------------------------------------------------------------
INSTALLING ADDITIONAL PROTOCOLS
-------------------------------
To install a new protocol first copy the protocol into the directory
that you wish use. Then type OMEGAEXT at the DOS prompt.
A menu will be displayed with the currently defined protocols and
several entries marked "(Not defined)". Select one the the not
defined entries by pressing the letter that procedes it.
At this time a menu will appear. You may use the up and down arrow
keys to move from item to item. First select the very top item and
press <F1>, this will erase the "(Not defined) message. Now you may
type the name that you wish to assign to this protocol.
Next move down one line and press "N". If you know that this
protocol restores the machine to EXACTLY the same state as it was
before the file transfer, then you may press "Y". You should allways
use "N" if you are not sure. The most that will happen is that the
first couple for characters that are received after the file transfer
will be lost.
Next, you will find a send command and a receive command. These will
vary considerably with each protocol, therefore, it is imposible to
advise you how to configure these lines. However, the following
information should allow you to configure almost any external
protocol.
The following is a list of commands that you may use to configure
external protocols.
%B Baud rate One of: 60, 75, 100, 110, 150, 300, 350,
400, 450, 600, 1200, 2400, 4800, 9600,
19200, 38400.
%C Communications port Either 1 or 2.
%D Data bits Either 7 or 8
%F Filename (default path = none)
%f Filename (default path = location of OMEGAEXT.DAT)
%P Parity (upper case) One of: O - odd, N - none, E - Even
%p Parity (lower case) One of: o - odd, n - none, e - Even
%S Stop Bits Either 1 or 2
%X Download path Path where OMEGAEXT.DAT was found
%% The % character Provided so that this character may be
passed to the external protocol
%$ COMSPEC environment variable value
(Usally x:\COMMAND.COM where x is the
boot drive)
The following examples assume that your modem is hooked to COM1 and
is running 8 data bits, no parity, 1 stop bit, 2400 baud, and the
file OMEGAEXT.DAT is found in C:\OMEGA\FILES.
---------------------------------------------------------------------
Command: %$/C CISB PORT %C SPEED %B
This will execute COMMAND.COM and pass it the command line:
/C CISB PORT 1 SPEED 2400
It should be noted that command.com will do a path search for the
file CISB. This may be useful in some cases.
---------------------------------------------------------------------
Command: DSZ COM%C RATE %B SETUP %D-%P-%S %X %F
This will execute the command DSZ.EXE and pass it the command line:
COM1 RATE 2400 SETUP 8-N-1 C:\OMEGA\FILES\ filename.ext
where filename.ext is the filename that you enter at the prompt.
---------------------------------------------------------------------
Command: C:\OMEGA\PCKERMIT.EXE /c%C /b%B /p%p /t%f
and you type SMILE.TXT at the filename prompt.
This will execute the command C:\OMEGA\PCKERMIT.EXE with the command
line:
/c1 /b2400 /pn /tC:\OMEGA\FILES\SMILE.TXT
---------------------------------------------------------------------
Please note that there are several differences between the sequence
%X%F and %f. The first will not allow you to change the default path
portion, but the second will. Also, the first will not display the
default path when you enter the filename, where the second one will
display the pathname.
---------------------------------------------------------------------
---------------------------------------------------------------------
After both the send and receive commands there are two switches. The
first of these is the "Global filenames allowed" switch. This switch
disables the check of entered filename, allowing global filenames to
be passed to the external protocol. The second switch is "Filename
required" and is reserved for future use. Set it to "Y."
USING AN EXTERNAL PROTOCOL
--------------------------
To use an external protocol that has been installed, press
<Ctrl-PgUP> to upload or <Ctrl-PgDn> to download. Then select
number 6 (external) from the protocol menu. The external protocol
handler will be loaded and you will be presented with a menu of
protocols. Select the desired protocol and enter a filename if
required. When the file transfer is complete you will be prompted to
press and key to continue. As soon as you press a key you will be
back in Omega-Link.