Messages in this thread | | | From | "Daniel J Blueman" <> | Subject | Re: driver for 3COM USR PCI v.90 modem? | Date | Thu, 9 Sep 1999 21:41:07 +0100 |
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Hi all,
Writing a softmodem driver should be fairly tricky, all in. It looks like you need to setup a thread to convert the digital data going out to frequency-modulated sound with the aid of a DSP on the softmodem card. This thread needs to be run at a high priority, so an underrun condition is not reached. Unfortunately, not all softmodems have a DSP, some don't have a 'datapump' either. I don't know what happens in this case (memmap the phone line?? heehe).
Rockwell is one of the large supplier of softmodems (+generic). 3com and Lucent Technologies are other large suppliers. AFAICT, the rockwell chipset is used in the majority of softmodems I have seen. A while ago, the Rockwell modem division changed hands (or something of some sort), so maybe they will be a little more helpful if asked for info.
I must admit, I had a couple of softmodems in computers at home here, but I ditched one for a real modem. If I can get some tech docs, I'd try my hand at writing a driver. Hmmm...
Dan __________________________ Daniel J Blueman - daniel.j.blueman@stud.umist.ac.uk Undergraduate - BSc Computing Science UMIST university - Manchester
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