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Modem and Dos

By Mike (from Canada) ·
ok, for the longest time, I have been trying to figure out how to get a PCI modem to work in MS-DOS. now I am assuming I am missing something obvious. I tried writing a program in visual basic to read the modem and all I got was FATAL ERRORS (0E). Itried loading device drivers specifically for uarts and I loaded the modem driver. I still cant run it in dos. I tried turbocom VIP. It doesnt work either. What programming language can ACTUALLY read PCI modems? or how do I make a program that does it. I can use Visual Basic and Quick Basic (for dos). or Where can I get a driver that can make the PCI modem work in DOS? I need help!

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Modem and Dos

by danpiers In reply to Modem and Dos

At the DOS level, you communicate to a modem directly through its communications port. There are four recognized ports available to DOS. Unfortunately, almost all PCI modems do not posess (nor present) a standard communications port in the hardware. They only emulate a "serial" port through their Windows driver/enumerator software. This is why they can wind up at very strange addresses, using any available interrupt.
Some PCI modems are partial (or total) Winmodems. Winmodems usually depend on the system's CPU to perform much of their work and often have limitations on the processor they will work with (listed in their requirements.) Many PCI modems are not Winmodems, but called "software driven" modems. These more or less "real" modems do not use the processor directly. A software-driven modem can work in an older 80486, as long as it has a PCI slot.
The bottom line is that unless the Windows enumerator is in play, most PCI modems can not be addressed. Hope this was helpful.

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Modem and Dos

by Mike (from Canada) In reply to Modem and Dos

Thanks but I am sure there is something out there that can make my modem work in DOS. It can be within Windows too.

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Modem and Dos

by M_Ozog In reply to Modem and Dos

My experience has been that DOS programs cannot communicate with PCI devices. Thay are only capable of "talking" with devices on a ISA or similar slot.

Matthew Ozog
Excellis
mozog@excellis.com

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Modem and Dos

by Mike (from Canada) In reply to Modem and Dos

Thanks for the facts but I am sure there is an answer.

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Modem and Dos

by Mike (from Canada) In reply to Modem and Dos

Or better yet, where can I get a driver for PCI modems for windows 95 or later that ACTUALLY allows dos support on any modem, or where can I get a program that can allow users to use a COM port for a PCI modem? dont say turbocom VIP because I tried that and it fails to work. and no, my modem is not broken.

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Modem and Dos

by Mike (from Canada) In reply to Modem and Dos

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