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General Discussion Board \ Calculator Discussion \ Need some link port specs...

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tripleX
Probe
Posted: 9 Sep 2002
21:04 GMT
Total Posts: 1
I got refered to Mr. Anderson by a certain Lionel Debroux on a TIGCC forum for trying to find out more on TI89's link port and its usage in ASM programs.
Do you know, what is the shortest period of a "logical 1" signal that can be sent through the TI89's link port. I'm in need for about 40kHz signal of loical zeros and ones. How is, by which voltage, logical 0/1 coded in TI89's link protocol, do you know?!? Any ASM sources or even any material out there on how, by which registers, to use link port (set it's freq. send a logical 1/0 out of the port, etc.)???
Thanks in advance,
Triple_X

P.S.
Trying to use the link port to power an external IR LED diode, probably isn't a very good idea, huh?! Any thoughts?!
zkostik
Carrier
avatar
Posted: 10 Sep 2002
17:12 GMT
Total Posts: 2486
hey, although Barrett doesn't code in 68k ASM, he might know the answer to your question. since he's banned from his comp right now, it might take him a little while to respond. so, don't worry, he'll respond soon.

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Barrett
Administrator
avatar
Posted: 10 Sep 2002
17:24 GMT
Total Posts: 1676
sorry i don't know anything about the link ports in asm... but i do believe that someone has made IR links for some calcs before (not sure about 89)... i'm not entirely sure; but someone like that should be able to help

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-Barrett A





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