Re: TI-H: TI Network - TIN
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Re: TI-H: TI Network - TIN
I2C doesnt have any collision detection. It is 'loss of arbitration
detection', which isnt that hard as long as our devieces on the bus used a
bidirectional interface (check out what i mean at the I2c faq:
www.ping.be/~ping0751/i2cfaq/i2chardw.htm)
When a master (aka a calc) cant make a line go where it wants, it waits
till the bus is free again.
the TIN protocol could use this. just ahve it so the protocol is:
START,[DATA(ACK)]...,STOP or wahtever.
or you could have START,[DATA,PARITY,(ACK)]..., STOP
Get my drift?
the hub could be a simple connection between all thelines, like a I2c
conenction is, jsut wiht recepticles. It could have a built in device for
his filew server type dealy. Big as you want.
If we make our own protocol, we can have more addresses, we can add in
network gateways (e.g. net1<-gateway->net2) wiht the gateway having a
buffer, etc. I think it would work nicely.
Implemetnation might take a while, but it would definetly be worth it.
At 03:17 PM 10/17/98 -0800, you wrote:
>
>NO!!! Use I2C. Do you know how much time and resources making a new
>netowork with collision detection would take? :)
>
>If you want a hub with blinking lights, just take afew isolation ICs, a
>diode, and 2 divide by 10 discreate chips. That would make nice little
>blinking lights for each port! :)
>
>Grant
>
>> I have been hearing tons of stuff about the MBus but to me it seems
>>that it
>>falls short in several areas.
>>1. The MBus 'client side software' is not available for all TI-calcs (only
>>TI-85/86, I believe).
>>2. The MBus protocol is not unique. It is owned by Philips and is
>>therefore
>>the application we are using it for is (technically) illegal since there are
>>no certified I2C devices on the network.
>>3. There isn't a file server.
>>
>> So, I propose a new TI Network, tentatively titled "TIN" (an acronym.)
>>However, I myself do not have the crucial electronics knowledge to
>>create/implement this idea. I am calling on everyone in TI-H to put forth
>>some effort into this if they can.
>>Specifications:
>> -central 'hub' that can be connected to by standard TI 2.5 mm link
>>cables
>> -'hub' allows for file sharing, multiplayer gaming, and chat
>>applications
>> -software/drivers and hub compatible with TI-82, TI-83, TI-85,
>>TI-86, TI-89,
>>and TI- 92(+); obviously, different software/driver versions will
>>need to be
>>made
>> -does not require tons of electronics knowledge to be built
>>Ideal Extras:
>> -hub can hold files due to either some RAM or a small IDE hard drive
>> -files can include:
>> -downloadable applications
>> -files, for applications
>> -variables
>>
>> First of all, this may not be technically feasible - but I think it
>>can be
>>done. Second, I realize that this may be cost prohibitive - but I highly
>>doubt it. While I realize only certain models of calculators will be
able to
>>share files, it would be a nice feature. Additionally, the multi-player
>>gaming applications could be good, as well as educational applications. I
>>think that this would be a worthwhile project as opposed to the flame
wars and
>>arguments going on. Please get back to me ASAP,
>>
>>Rob Hornick
>
>
-Jonathan Kaus
kaus@cybrzn.com
jedsmeny@hotmail.com
jedsmeny on IRC (DALNet or EFNet)
ICQ: 15973088 (jedsmeny)
AIM: Jedsmeny
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