On the halfnut HP41s, is the only difference between a CV and CX the second circuit board attached on the CX? In other words if I soldered the 2nd board from a CX onto a CV would the CV effectively be a CX with the time, extended functions and extended memory?
Thanks,
Ken
Almost. But there are some extra functions related to external memory in the ROM of the CX that you don't find in a CV with the time module added on. There's also the text editor "ED" that you won't get with the CV + time module combo.
(11-10-2019 10:59 PM)Ken S Wrote: [ -> ]On the halfnut HP41s, is the only difference between a CV and CX the second circuit board attached on the CX? In other words if I soldered the 2nd board from a CX onto a CV would the CV effectively be a CX with the time, extended functions and extended memory?
Thanks,
Ken
If that board is missing on the CV, I believe doing what you suggest will make it a CX minus the stickers. I wonder how they crippled the halfnut 41C model not to be a CV?
(11-12-2019 12:07 AM)hth Wrote: [ -> ] (11-10-2019 10:59 PM)Ken S Wrote: [ -> ]On the halfnut HP41s, is the only difference between a CV and CX the second circuit board attached on the CX? In other words if I soldered the 2nd board from a CX onto a CV would the CV effectively be a CX with the time, extended functions and extended memory?
Thanks,
Ken
If that board is missing on the CV, I believe doing what you suggest will make it a CX minus the stickers. I wonder how they crippled the halfnut 41C model not to be a CV?
Thanks for that. I will give it a shot and see if it works and report back. I have a halfnut CV which after cleaning the battery terminals works fine and a CX which was damaged pretty badly by leaked batteries with some keys locked up from corrosion.
I think all the ram and rom are on one chip for the base 41 functions, I wonder if they just leave some connections on the chip un-soldered from the board? Be a lot cheaper than making a second chip just for the 41C