🚀 go-pugleaf

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.  ;-)

>Details here:
>http://www.jacques-laporte.org/HP35%20Hardware%20basic%20design.htm