Re: TI-H: TI <--?--> I2C


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Re: TI-H: TI <--?--> I2C




They are connected in parallel.  all "A" wires are connected together, all
"B" and "C" in the same way.

10base-2 has no hub.  ALso 10base-T hubs are basically repeaters.  The data
sent in one port goes to all of the ports.

There have been networks for years that havn't used hubs...


Gant

>So then how are TI-calcs networked if there is no MBus hub?  I understand
>the MBus/I2C thing now, but I still don't get how people told me that it was
>a network if there is no hub for it...
>
>-Miles Raymond
>
>-----Original Message-----
>From: kaus <kaus@cybrzn.com>
>To: ti-hardware@lists.ticalc.org <ti-hardware@lists.ticalc.org>
>Date: Saturday, October 17, 1998 10:53 AM
>Subject: Re: TI-H: TI <--?--> I2C
>
>
>>
>>Go to www.clinet.fi/~ozone/i2c for information on the Mbus and I2C systems.
>> Grant is right in that you only can legally use the I2C protocol if you
>>have a I2C device made by Phillips in the network.  However, its not likely
>>that Phillips is going to come to your house and investigate your
>>calculaotr for fear that it may use the I2C protocol.
>>
>>Back to your initial question, yes, two calculators using a ti-cable can
>>use the i2c protocol. When grant said there was no MBus, he meant that
>>there was no MBus protocol.  While this is not entirely true (Osma did
>>modify the I2C protocol slightly to better accomadate a calculator
>>network), the MBus system is more like a bunch of routines which enable you
>>to use the I2C protocol from your calculator over the link port.
>>
>>Jonathan Kaus
>>
>>At 10:19 PM 10/16/98 -0800, you wrote:
>>>There is no MBus.  Under the restrictions made by Philips the standard
>must
>>>be called 'I2C' and have atleast one authorized I2C device on the network,
>>>none of which include a TI calculator.
>>>
>>>You can use the I2C bus routines on your calculator only if you have a
>real
>>>I2C device on the network.
>>>
>>>The SDA and SDC lines are all connected in parallel and handshaking is
>>>accomplished similar to 10b-t ethernet, but not totally the same.  All
>>>grounds also have to be connected.
>>>
>>>Grant
>*CLIP*
>>-Jonathan Kaus
>>kaus@cybrzn.com
>>jedsmeny@hotmail.com
>>jedsmeny on IRC  (DALNet or EFNet)
>>ICQ: 15973088 (jedsmeny)
>>AIM: Jedsmeny


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