🚀 go-pugleaf

krw wrote:
> On Sun, 25 Jan 2009 21:09:10 GMT, James Arthur
> <bogusabdsqy@verizon.net> wrote:
> 
>> krw wrote:
>>> On Sun, 25 Jan 2009 20:25:11 GMT, James Arthur
>>> <bogusabdsqy@verizon.net> wrote:
>>>
>>>> David L. Jones wrote:
>>>>> On Jan 25, 7:17 pm, Raymond Wiker <r...@RawMBP.local> wrote:
>>>>>> "David L. Jones" <altz...@gmail.com> writes:
>>>>>>
>>>>>>
>>>>>>
>>>>>>> The latest 12C actually uses an Atmel ARM processor (as in the new
>>>>>>> 20B) running the original 12C ROM using the Nonpareil emulator:
>>>>>>> http://nonpareil.brouhaha.com/
>>>>>>> Rumor has it further Voyager models (11C, 15C etc) will be re-released
>>>>>>> with this method.
>>>>>>         How does the ARM.based version compare with the old version,
>>>>>> in terms of speed and battery life? I would not be surpised to hear of
>>>>>> an 11C that was still on its original set of batteries :-)
>>>>> I haven't head about the new 12C as apparently it's quite hard to find
>>>>> and identify them on the shelves, and only sold in Europe or somewhere
>>>>> so far?
>>>>>
>>>>> If the new 20B is anything to go by (and it should be because it's the
>>>>> same processor) then battery life it will be a shocker.
>>>>> Rated 9 months from two CR2032 batteries.
>>>>> IMO HP goofed big in the design of the 20B. It works at 30MHz for all
>>>>> calculations (then goes to sleep), but that means 15mA or so from the
>>>>> two CR2032 batteries. This means big losses in the battery internal
>>>>> resistance when doing calcs.
>>>> Why on earth does a calculator need to run at 30MHz?  The
>>>> original HP15c ran at 220KHz[*] in 1983.
>>> So there is no lag in 59!?
>> I just tried it.  Less than 1 second, AFAICT.
>>
>>>  Do you happen to know that the HP35's
>>> clock was?
>>>
>> Two-phase quadrature 200KHz clock, divided down from 800KHz main osc.
> 
> Only 10% in 11 years.  G. Moore obviously didn't work at HP.  ;-)
> 

Bill Gates didn't either. Else the 15C would have probably needed 512MB 
of internal RAM to calculate a square root.

-- 
SCNR, Joerg

http://www.analogconsultants.com/

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