Re: TI-H: eeprom

To: ti-hardware@lists.ticalc.org
Subject: Re: TI-H: eeprom
From: David Knaack <dknaack@rdtech.com>
Date: Wed, 2 Aug 2000 21:53:27 -0500
Reply-To: ti-hardware@lists.ticalc.org

psys@cotelco.com.ar wrote:
> 
> i'm the owner of a ti-92, and my project is add an SmartMedia.
> 
> the circuit is quite simple, hc245 to buffer the bus, a hc373 to
> generate ALE, CLE and *CE, and some decoder ics.
> but the real magic will be the software.
> i think is better than using a uC thoung the serial link.

The main advantage should be that it should be many times the speed of a
link-port based version.  A believe there is an AVR based direct-bus
design out there somewhere too (might be Grants design), but I have no
idea if it was ever built or if any software was written.

There was a robotics project using 92's that used direct bus access at one
point, looks like they acutally completed it:

http://www.geocities.com/SiliconValley/Peaks/6869/

Very cool project, great way to do an expander, but more programming than
I have time to do.

DK

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