> -----Original Message----- > From: Mike Harrison [SMTP:mike@WHITEWING.CO.UK] > Sent: Monday, November 06, 2000 12:59 PM > To: PICLIST@MITVMA.MIT.EDU > Subject: Re: [PIC]: Modem suggestions > > On Mon, 6 Nov 2000 01:20:51 -0000, you wrote: > > >----- Original Message ----- > >From: "William Chops Westfield" > >To: > >Sent: Monday, October 30, 2000 10:52 PM > >Subject: Re: [PIC]: Modem suggestions > > > > > > > >> You might want to look into some PCMCIA modems (which will hopefully > >outlive > >> the ISA bus by a bit.) Don't some PCMCIA modems essentially bypass > most > >of > >> the PCMCIA bus and just sit off a serial port? Also, perhaps internal > >> modems aimed at mac or older PC laptops might be useful. > > > Yes - with most PCMCIA modems you are effectively talking to a > 16550-style uart with a hayes-type modem connected to it. About the > only part of the PCMCIA spec you need to know is the pinout! Almost > all of the card/socket services stuff is to do with mapping the card > into the host machine and so is not required for a MCU application. > Unfortunately you won't be able to get at the serial part directly (in > modern modems this probably doesn't physically exist), but talking to > the uart should not be at all difficult. > One minor caveat, though - don't assume that a simple interface will > necessarily work with ALL PCMCIA modems - there may be some that are > implemented differently. This should not be a major problem - just be > sure to test any modems you plan to use, and don't let users plug just > any old modem in and expect them to work. > There are also Winmodems available in PCMCIA form. I have an IBM 10BaseT/V90 Modem which I had no end of trouble getting working. I only found out after extensive digging that it was a winmodem. Needless to say, not suitable for use with a PIC! Mike -- http://www.piclist.com#nomail Going offline? Don't AutoReply us! use mailto:listserv@mitvma.mit.edu?body=SET%20PICList%20DIGEST