Few questions about HP65

[albertofenini]

Hi everyone,

I'm wondering a couple of things about my favorite calculator, the HP65

How complex would it be to add a constant memory feature ? Can it be done with the original logic board ?

How complex would it be to add the thousands ., by this I mean display a dot every three digits, i.e. like this 1.250,00

I also have found a reference to a couple of old number of the PPC articles where it is mentioned
something about attaching a printer to an HP-65, V2N6P2 which I guess is Volume 2 Number 6 (June 1975 ?)
and the title is HP65 connecting a printer and V2N9P20 HP65 Printer

Has anyone more info about these or other articles ?

Both appears to be in the PPC Cdrom which I don't have and there are some interesting articles about the HP67 as well
like a speed up switch installation ....

Thanks anyone for help and sharing ideas !
Take care !!