Date: Fri, 14 Nov 1997 16:26:23 -0500 (EST) From: Jamie Bowden <jamie@itribe.net> To: Dave Alderman <dave@persprog.com> Cc: freebsd-hardware@freebsd.org Subject: Re: modems Message-ID: <199711142128.QAA14926@gatekeeper.itribe.net> In-Reply-To: <346CB3AD.AEC93383@persprog.com>
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On Fri, 14 Nov 1997, Dave Alderman wrote: > Gary T. Corcoran wrote: > > > > Stefan Molnar wrote: > > Actually it's not the 'UART chip' that's emulated in software, it's the > > 'controller' microprocessor (often a Z-80). That is, it's the chip that > > interprets the 'AT' commands and controls the datapump (DSP) which is emulated > > in software. Generically, they're known as 'controllerless' modems. > > > > Nevertheless, they only come with Windows drivers to emulate the controller, > > and won't work in *any* Unix environment, including FreeBSD. > > > > If I remember correctly, there used to be a modem called an RPI modem that performed the > data compression in software as well as the modem control functions. Very nasty. Are any > of the current crop of "winmodems" similar to the old Rockwell RPI based stinkers? > > NOTE: I like Rockwell modem chipsets in general - I just thought RPI was ill-conceived. > > -- > "Going down to South Park - going to leave my woes behind..." > David W. Alderman dave@persprog.com > Winmodems are missing one of the chips a normal modem has (I forget which one, as it was unimportant since I would never use one), and uses software to offload that chip's function onto the main processor. Jamie Bowden Systems Administrator, iTRiBE.net If we've got to fight over grep, sign me up. But boggle can go. -Ted Faber (on Hasbro's request for removal of /usr/games/boggle)
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