Tasman Turtle Logo-Style robot

Hi,
I recently acquired a Tasman Turtle...early 80s Logo-style two wheel turtle robot. (A few pics here http://ai-robotics.org/Site/AI-Robotics/Entries/2010/9/12_Tasman_Turlte.html )
According to a Robotics Age editorial (May/June, 1983 Vol. 5 No. 3) there was an RS232-C version and an Apple II version. I seem to have the RS-232 version, but no manual and no software. I'm wondering if anyone is familiar with these and can point me to any documentation or software? I haven't been able to find anything online. The design seems pretty straightforward, but it would be helpful to have something to work from. Any ideas?
Thanks...Win
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