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Author Topic: TI/Casio IO cables -  (Read 3739 times) Bookmark and Share
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calc84maniac
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« Reply #30 on: 04 May, 2011, 17:31:11 »
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Quote from: JosJuice on 04 May, 2011, 16:21:37
Quote from: critor on 04 May, 2011, 16:10:56
Any standard audio plug is the same as the Casio plugs.

The problem is that you have to be very carefull when plugging it, or you'll get contact issues.


For example, the calculator does temporary freeze (cursor and keys) if it's not plugged correctly.
Hmm... When using my audio 2.5 mm plug (headphones) with my 84+SE, the issue of one sound channel disappearing is frequent. I have to move the plug a bit to make it work. The OS always freezes when headphones are plugged in, but I assume it would be different if a calc is plugged in instead.
The reason that the OS freezes is that the headphone lines are always low, so the OS thinks another device is starting a transfer.
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« Reply #31 on: 04 May, 2011, 21:20:52 »
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Quote from: FloppusMaximus on 04 May, 2011, 03:58:26
Well, I guess if you have Calcsys on your own calc, you could connect it to somebody else's calc and then have them attempt to send a variable.  The first thing you see should be (if I remember correctly) 73 68 00 00 - if the data lines are swapped, that would come out as 8C 97 FF FF.

You could, if you wanted to, write assembly programs to send and receive variables over a "twisted" cable (if that is, in fact, what it is.)  It wouldn't even be terribly difficult.  Getting the system I/O functions to work correctly, though, couldn't be done without modifying the OS.
So, what port should I be watching?  I was watching the first one, labeled "link" and it just changed from 3 to 2 for a bit and back to 3 again.

EDIT: or is it the "link console"
« Last Edit: 04 May, 2011, 21:21:18 by Darl181 » Logged



 
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« Reply #32 on: 06 May, 2011, 01:52:25 »
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Tried it again, and the link console just seemed to freeze.  A few times, an "FF" appeared on the bottom half inverted, so I'm guessing it was part of the
Quote from: FloppusMaximus on 04 May, 2011, 03:58:26
8C 97 FF FF

Can someone say what port I'm supposed to watch, or is it the link console.  TIA

btw I did try asking at hcwp, but I didn't really get any useful answers so yeah Tongue
« Last Edit: 10 May, 2011, 04:35:47 by Darl181 » Logged



 
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« Reply #33 on: 07 May, 2011, 09:16:29 »
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I was wondering if someone who has two TI calcs and a Casio cable would be able to test this, since I only have one TI calc.
Quote from: FloppusMaximus on 04 May, 2011, 03:38:17
An easy way to test it (if you have two 83+-series calcs) would be to use Calcsys's link console and see if all the bits come out flipped (e.g., if one calculator sends 55, the other receives AA.)
TIA again Smiley
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« Reply #34 on: 07 May, 2011, 21:56:05 »
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Whoa, triple post.  I'm pretty sure Qwerty.55 has both calcs, and has messed with that.
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« Reply #35 on: 07 May, 2011, 21:56:56 »
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@Darl181, even in most extreme conditions, I think triple post should be avoided.
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« Reply #36 on: 07 May, 2011, 21:57:46 »
+1
Triple post over the course of 4 days, check the dates Tongue

Spoiler for getting sort of annoyed...:
If you're easily offended, feel free to not read this.  Not trying to offend anyone anyway, but JIC Wink

How about if you made a topic about a question you needed answered and as soon as you ask the question the topic dies.  Even after you bump it.  Twice.  Maybe you even ask at HCWP and barely get any help at all other than "it should work", after you explicitly say it doesn't.  It's like that MSD8X thread, where I had to bump it ~3 weeks later and only because of an IRC convo I got an answer.  (also, I wasn't the only one who benifited from an intelligible answer, try going through the rest of the thread) So yeah, that's where the triple post came from.

Also btw, you'll notice some triple posts in the Tio thread, of various updates and such.  Nobody pointing it out there.

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Quote from: graphmastur on 07 May, 2011, 21:56:05
I'm pretty sure Qwerty.55 has both calcs, and has messed with that.
I talked with him on IRC last night, he didn't mention messing with it but when I can I'm going to get a multimeter and find out what input for what part goes where.
« Last Edit: 07 May, 2011, 22:28:49 by Darl181 » Logged



 
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« Reply #37 on: 10 May, 2011, 04:34:00 »
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Quote from: Darl181 on 06 May, 2011, 01:52:25
Tried it again, and the link console just seemed to freeze.  A few times, an "FF" appeared on the bottom half inverted, so I'm guessing it was part of the
Quote from: FloppusMaximus on 04 May, 2011, 03:58:26
8C 97 FF FF

Can someone say what post I'm supposed to watch, or is it the link console.  TIA

Yes - I was referring to the "Link Console", not the "Port Monitor" - sorry I wasn't clear.

If you're only seeing FFs, that would seem to indicate it's not working properly.  On the other hand, if critor's right about the plugs being different, that could be causing problems as well, and maybe if the plug were seated differently it might be made to work.  It'd be interesting to test it with two TI calculators, and see if the individual lines can be controlled as expected.
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« Reply #38 on: 10 May, 2011, 04:38:58 »
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I'm hoping it's something as minor as the plug needing to be sanded a bit...

Just got a multimeter today, mint-condition, from Radioshack.  Doesn't work Tongue
So yeah, I'll try returning it and getting a new one tomorrow and/or seeing if there's a continuity tester in-store that I would be able to use.
« Last Edit: 10 May, 2011, 04:43:40 by Darl181 » Logged



 
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« Reply #39 on: 10 May, 2011, 06:02:22 »
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I have both a Casio and a TI if you want me to test something. I don't have two TI's but I could borrow a friend's for a test.
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« Reply #40 on: 11 May, 2011, 02:41:12 »
+1
Got a working multimeter today Grin and was able to test it.


Details of a Casio cable:
The sleeves (labeled as 1) are connected.
The tip (3) is connected to the ring (2) on the other side.  Same both ways.

Looks to me like the 'data lines' are swapped...


EDIT: ndless to say I don't have a TI cable to do the same test with...but I'm suspecting that with TI cables, the tip on one side is connected to the other and the ring is connected to the ring.  w00t.
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« Reply #41 on: 17 May, 2011, 00:28:15 »
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Bump.
I think, what might make it work, would be some sort of hook that intercepts the stuff sent to/received from the link port, and virtually swap the tip and ring.
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« Reply #42 on: 17 May, 2011, 01:51:21 »
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Quote from: Darl181 on 17 May, 2011, 00:28:15
Bump.
I think, what might make it work, would be some sort of hook that intercepts the stuff sent to/received from the link port, and virtually swap the tip and ring.
You can't cause the input from port 0 to change, though. That's how the OS gets the state of the link lines, after all. And also, you would have to switch the inputs/outputs on exactly one of the calculators.
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« Reply #43 on: 17 May, 2011, 01:54:28 »
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True.  looking at the picture above, the parts labeled 2 and 3 would have to be switched, and most likely on my own calc.

I'm hoping those are ports 1 and 2?

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« Reply #44 on: 17 May, 2011, 02:13:13 »
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Darn, I wish the cables were the same. My old 83+ cable is almost completely broken now so if it stops working forever, I'm gonna be stuck with like 4 Casio cables.
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