28 Jun
2009
28 Jun
'09
1:37 p.m.
Oops, too fast me and my big mouth ;-)
-----Oorspronkelijk bericht-----
Van: cctalk-bounces at classiccmp.org
[mailto:cctalk-bounces at classiccmp.org] Namens Tony Duell
Verzonden: zondag 28 juni 2009 20:13
Aan: cctalk at classiccmp.org
Onderwerp: Re: HP Calc emulators
I found this from Eric Smith:
http://www.brouhaha.com/~eric/hpcalc/chips/
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 :-)
Told you, the 300 series (some) are fun too ;-)
The DS is going to the painter half of august.
After that there will be more pictures.
-tony
-Rik