|Re: Clonix 41 module proyect, 2x upgrade.|
Message #10 Posted by Werner on 5 Nov 2003, 3:42 a.m.,
in response to message #9 by Diego Diaz
you just said:
"Up to now, there seems to be no much interest in the issue, or no interest at all in the Clonix... time will tell."
Oh, I think there is a lot of interest, maybe yet not many messages here at this place.
I am VERY interested in such a great option, please keep on working on it! It is a wonderful project!
From my point-of-view I cannot really decide what would be better (for me), double speed or low power consumption. (I have a "slow" and one speeded-up (x2) HP41CX, so fortunately I could use your module anyway)
Concerning power consumption:
You mentioned 1mA vs. 20mA at standby.
Do you have numbers of former devices to compare with ?
a) how much current is needed for the HP41CX without extension modules ?
b) how much extra current would be needed for a X-Memory module, a HEPAX 8k/16k module or a ZEPROM module ?
Concerning the speed issue:
There was a question in the sandbox thread with regard to the possible speed of ZEPROM modules. I tested my ZEPROM-16k module in my 2x speeded-up HP-41 and it still works fine. But I have not yet measured the power consumption !
Concerning your question on maximum speed for fullnuts and halfnuts:
I found a note in the forum on a 3 to 4 times speed upgrade for halfnuts:
"The half nut circuits works great even without the mounted 150pF capacitor at 3-4x (BEEP sounds very different at that speed)."
I also had found another note a year ago in the web speaking about a times-4-upgrade of halfnuts. Unfortunately I did not save the document and cannot relocate it by Google. I still remember that there was written that the new halfnut circuitry was based on hardware technology of the later calculator models (e.g. HP-42s) und could thus be speeded up twice as much as the fullnut which could only be speeded up to 2 times maximum (sometimes less, dependend on the device).
Nothing was written on the speed upgradability for X-Memory modules or, e.g., the HEPAX RAM. Can they also follow a 4x speed up? I do not know.
Does anyone have information or practical experience on the described x3-x4 upgrade ?
So far for the moment. Please keep on going with your nice project - independent if fast or "slow" - I can only congratulate you to that activity!
Edited: 5 Nov 2003, 3:47 a.m.