RE: TI-H: direct bus access
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RE: TI-H: direct bus access
There are two versions. The serial and the paralel. The paralel version
has a maximum of 1536 I/O lines (64 cards max with 24 I/O per card). The
serial version is slow, and would require RS-232, but if you could
attach it some how, you can simultaneously connect up to 16 complete
systems (16x1536=24576 separate I/O lines) I suppose all we need is the
paralel, but 1536 lines beats any HP I would assume!!!
As for those cards I mentioned, there are 4 main cards, the 24 Input
card, 24 output card, 3 port 8-bit Analog to digital converter, and 3
port 8-bit Digital to Analog converter. Can you imagine the
posibilities! Let HP top that!!!
(the book shows how to customize the system for nearly ANY computer! I
can look at it and see how we can do the job!)
>
>Oh, and one other thing... how many ports? to completely embarrass the
HP48 people, we need at least 34 (they have 33 available)
>Christopher Kalos
>raptorone@stuytech.com
>Executive Director/Administrator
>Virtual Technologies Developer's Group
>
>
>----------
>From: Richard Piotter[SMTP:richfiles1@hotmail.com]
>Sent: Monday, January 19, 1998 11:37 PM
>To: ti-hardware@lists.ticalc.org
>Subject: Re: TI-H: direct bus access
>
>
>I sugested using the Test access port to learn the data and addresses
>for the TI-92's processor. I recomended using it for expansion. I know
>of a design that allows amazing expansion with only a few memory mapped
>I/O lines. I asked if anyone knew the pinnout for the Test access
panel.
>A connector could be connected between the ROM pack and the connector
to
>give the I/O lines. Your memory mapped I/O could then control this
>expansion device. It is a modular expansion system with various I/O
>cards. It's great! It could easily allow a TI-92 to control a complex
>robot or a model railroad (the original application for the system, but
>it was immediately used for other things, even a homemade security
>system!). I want to see this information!
>
>Richard Piotter
>richfiles1@hotmail.com
>
>>
>>
>>
>>Would anyone care if I told you that I have achieved direct bus access
>to
>>a TI 92? This has enabeled me to create external memory-mapped I/O
>>ports. Is this a good thing or does anyone even care?
>>
>>Chris Lambert
>>clambert@geneva.edu
>>calan@hotmail.com
>>URL: www.geocities.com/siliconvalley/peaks/6869
>>
>>
>
>
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