HP Calc emulators

[Tony Duell]

> 
> The first versions ran on a saturn processor the same as the HP-71B.

The orignal Voyagers (11C, 12C, etc) used a _NUT_ processor, similar to 
the one in an HP41. According to the datasheet there are differences 
mostly relating to the different battery voltage.

Original 11Cs and 12Cs contained 2 chips. The smaller one is the Nut CPU. 
The larage one is the ROM/RAM/Display Driver, always known as 'R2D2'. 
16Cs are much the same, the 15C has a thrid chip which is extra memory. 

Rik, I looked at your photos... It looks like some 9000/300 machines are 
going to be of interest to me. Darn, something else to look for :-). And 
I love your vehicle :-)

-tony