RE: TI-H: RE:IRLink Schematics


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RE: TI-H: RE:IRLink Schematics



Okay, here's the deal.  How many of you would be willing to pay for the service?  I can't rightfully charge for it, but I have a beta release of a TCP/IP overlay for RTerm.  It also reads the link data a bit differently.  I can now use the parallel link to connect to a PC.  I routed that through my modem (input LPT1, output COM2, use a few modem strings to init and connect), and I have the PC doing part of the work.  but the other day, I connected via telnet to my school and ran IRC!  slow type rate, garbled text, but it worked!

Now here's the kicker.  Metricom has been using a spread-spectrum frequency hopping technology for months now.  The modem/internet service with its own phone number costs $40 a month, I think.  Once I prepare this overlay to work over an AVR, we've got internet!  Of course, I still need a modem, or maybe I can figure out some way to handle DTMF generation and an ADC/DAC, and I'm done.  however, the deal is speed.  an add-on modem may not be as fast, and it will take me forever to develop it to work wireless.  By contrast, the Ricochet modems are out!

I will release the multiple port communication package as soon as I have squashed the more annoying bugs, such as the occasional overflow and disconnect.  But the real advantage is that I've squashed the TCP/IP stack into this program, making it so that this does not work OVER the computer, it merely uses it as one huge microcontroller.  
Christopher Kalos
raptorone@stuytech.com
Executive Director/Administrator
Virtual Technologies Developer's Group


----------
From: 	matt.johnson@wmich.edu[SMTP:matt.johnson@wmich.edu]
Sent: 	Wednesday, January 14, 1998 2:03 PM
To: 	ti-hardware@lists.ticalc.org
Subject: 	Re: TI-H: RE:IRLink Schematics


Hmm, I think that it is definatly possible. But, it sounds like a
project for the ti-hackers of the year 2010. We could possibly lay down
the ground work for such a system now. the only problem is in the speed of
the calculators. We would be much better off trying to setup a high speed
network for laptop and palmtop computers that did not use the exsiting
phone system. The demand on that system would much higher than that of a
calcuator based system because of the larger market and number of users.
Which would mean the time that it would take to start makeing money, from
the orignal investment, to get it working, would be minimized. But the
original investment would also be maximized.
 -mj
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