Interfacing a TI-85 to the BS2 ?

T&E Engineer

Has anyone ever tried to interface a TI-85 or other TI calc to the BASIC stamp. I tried to make the $5 serial TI-85 cable circuit but could not get it to work. Just wondering if it is possible to access the LCD?

Bean

Tim,
I don't have a TI-85 but I thought about this before and checked into. If I recall the TI-85 is not true serial data, I don't recall exactly do a search and see if you can find more details. I think the data is clocked in somehow, but I don't remember.
Bean.

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T&E Engineer

From what I have been able to tell it appears it uses Data I/O, Clock and Ground for the 3 connections (top of the pin, middle and base respectively).

There is a couple of circuits that appear to use I2C using SDA (Data I/O), SDL (CLOCK)·and GND (GROUND).

http://www.geocities.com/SiliconValley/Lakes/5081/SPinTerfaceCart.html

http://richfiles.solarbotics.net/Turbo85.html·(unrelated but interesting)

Chris Savage

Timothy,

·· Data, Clock & Ground could also indicate an SPI (Synchronous Serial) device which could be controlled via SHIFTIN/SHIFTOUT.· You may have to do a little more digging though.

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Chris Savage
Parallax Tech Support
csavage@parallax.com