Date: Sat, 1 Aug 1998 11:16:04 +0000 From: Bob Bishop <rb@gid.co.uk> To: "Gary T. Corcoran" <garycorc@idt.net> Cc: "Rick C. Petty" <rick@kris.wpi.edu>, freebsd-mobile@FreeBSD.ORG Subject: Re: Toshiba Tecra 550 int. modem, addendum II Message-ID: <l03020909b1e8a823278b@[194.32.164.2]> In-Reply-To: <35C290B4.889F8C3A@idt.net> References: <199807312251.SAA02705@kris.wpi.edu>
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At 11:51 pm -0400 31/7/98, Gary T. Corcoran wrote: >[...] >To make a long story short, forget about it. The Win95 host driver for >Mars not only interprets AT commands, it also manages the DSP, writing certain >values to certain registers at certain times, and implements or controls >the DSP >to support all the myriad of standards included in modern modems (e.g. V.42, >V.42bis, V.8, V.80, etc.) which go beyond the V.34 or K56Flex modulation >itself. >All this complexity results in a Win95 driver _binary_ of about 0.5 megabyte >(see LTMODEM.VXD in \Windows\System). This may well be the way things are going. In the days when Mac AV had a 68k processor and an onboard DSP, they introduced a thing called a GeoPort. This is a pod containing just the interface h/w to connect to the line. The modem code ran on the DSP, and the 68k did the control. I still use one of these things with a PowerMac; nowadays both the control *and* the DSP code run on the PPC 604! -- Bob Bishop (0118) 977 4017 international code +44 118 rb@gid.co.uk fax (0118) 989 4254 between 0800 and 1800 UK To Unsubscribe: send mail to majordomo@FreeBSD.org with "unsubscribe freebsd-mobile" in the body of the message
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