surprise calcs en route to hmm, Arcadia :p

1) http://datamath.org/Sci/Slimline/Business-Analyst-II.htm - should be TP0320 series MCU, for emulation testing
2) http://datamath.org/Sci/Slimline/TI-35.htm - can be either TP0320, 0455, or 0456
3) two of these(single auction) http://datamath.org/Sci/Slanted/TI-55-II.htm interesting calc, dual-mcu. On the ebay photo, one was larger than the other, we'll see if the insides is the same or not.