Re: TI-H: direct bus access
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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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