PassThru
(c)1998 Kevin Millican
THIS PROGRAM IS FREEWARE - ALL RIGHTS RESERVED

I wrote this program to enable me to use a PC's internal modem with my series 5. I have successfuly accessed the Web and BBS services up to 33.6k modem speed. It seems robust but if you have any queries please email kmillican@compuserve.com.

The program will work at valid speeds up to 115200 baud and basically sends all input from one serial port to the other and vice versa. If you wish to attempt faxing, speeds must be set to 19200 (Messagesuite uses this for fax regardless of your modem settings).

It is possible to specify different speeds for each port.

Ports 1-4 are supported and by default COM1 and COM2 exchange data. However if you press <space> instead of <enter> after running the program you can change this. It is also possible to use alternative IRQ numbers to the standard ones. If you change a port then it defaults to the standard one but you can then alter it.

Your settings are saved each time in PASSTHRU.INF so that you can just press <enter> once you have the right settings.

ENJOY

Changes from 1.2 to 1.3:-
* COM port addresses forced to match standard defaults (IRQs still selectable)
* Option to send modem factory reset string.
* Simulated modem status lights.
* Option to display incoming modem text to PC screen (can be useful for troubleshooting)

Changes from initial version to 1.2:-

* Efforts are made to force ports to be recognised first time the program is run even if another program has left the port untidily. (Basically the port is opened and DTR taken low then high, port shut, and then reopened)
* Escaping the program results in DTR being taken low on both ports - this should ensure modem hangs up and port is left 'cleanly' even if you exit without logging off a service correctly.
* The available COM ports are displayed during setup along with (rough) estimate of the UART type.
* Some errors will now report the problem.
* The data in/out is now shown as SD / RD - unfortunately this switches off so quick you can't always see it (the web does very little most of the time!)