Neat find (in my own junk bin!) - NS 8073

[Doug Jackson]

Hi

I saw a message on the classic computer list in 2003 from Ethan saying 
that he had a RB5X robot controller with a 8073 SC/MP controller on it.  
The thread degenerated into a general car discussion from what I have 
been able to determine.

Today, I received my INS8060 and INS8073 CPU chips from Unicorn - The 
8060's are easy, I have been able to find tons of doco, and will be 
producing a couple of SC/MP blinken lights and swiches systems (but not 
with 2012 ram chips ;-) ) shortly - That's the easy bit.

I am very interested in the INS8073 (with Tiny Basic onboard), and have 
so far come across a PDF of the 807x (8070/8072), as another spare time 
consuming system - My questions are;

1)  Has anybody got a reference implementation for the 8073 - I suspect 
that it involves a 4Mhz xtal, and a RS232 line driver/receiver connected 
to SA (as RXD) and F1 (as TXD) - that can be breadboarded easily, but 
the real secret is what address will it be expecting the external 6164 
ram to provide the 8k of massive storage...

2)  Did anybody end up reverse engineering the RB5X board - in the words 
of a somebody wiser than me  -- "That'l do in  a pinch"

3)  Does anybody have the basic reference guide that indicates the 
allowed word lists for this part?


Thanks,

Doug Jackson