Re: TI-H: UPSI/UBEC
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Re: TI-H: UPSI/UBEC
>> The Memory cart on the 92 has to have the data AND address bus
leading
>> to it. If someone knew these, paralel devices could be connected
>> directly to the TI-92's data and address bus and you could use the
free
>> addresses to access those add ons! It would be like all the custom
>> devices that people used to build for those old 8-bit computers. One
>> idea would be to add a SID chip (like in a Comodore) and a tiny
speaker.
>> You could set it to an unused address and be able to create wave form
>> generated sound of different loudneses and with 3 voices! You could
>> probably even add the Universal Bus Extender Card directly with the
>> calc!. The UBEC was designed a long time ago, but lets you control
1500
>> something I/O ports using only 256 bytes of unused addresses (I
think).
>> It has Input and output cards and DAC and ADC cards too. You can even
>> buy the boards, pre-etched from somewhere.
>> I suppose it's only an idea, but imagine what you could do with
direct
>> data/addres access!
>
>Yeah, sure, and most people trying to do this would fry their calcs.
You'd
>need some sort of a buffer in between the processor's data and address
pins
>and the port (UBEC or whatever), otherwise you'll quickly destroy
something
>crucial with e.g. a burst of static.
>
>Besides, what do we really need UBEC for? Maybe it's a standard, but
does
>it give any advantages?
1536 single bit I/O ports, which kicks CBL's ass!!!
Ass for requiring a buffer, the UBEC IS a buffer with an address decoder
that leads to a generic mother board that holds up to 64 cards, each
with 24 I/O lines or 3 8-bit DACs or ADCs. It would give the user the
ability to create custom, large scale applications using the calc, and
it would require only a driver and a link port connector to run it since
it's extenal, very fast version could be made on the TI-92's Data and
address buss if they were known and some unused addresses existed.
Imagine using it for robotics, and then being able to remove the calc
and analyse the data it encountered or reprogramming it without the
mechanical hardware or simply using it as a giant CBL!
It is only good to those who want to use it. I don't care if anyone uses
it, as long as it runs! If even one person got use out of it, it would
be worth my effort. It doesn't need the dirrect address and data
connection if you emulate them with the I2C chips. over the link port
the biggets limitation would then be speed, and with fast send/recieve
routines, it couldn't be that bad???
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