HP-65 Top row functions - Printable Version

HP-65 Top row functions - Printable Version

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HP-65 Top row functions - Matt Agajanian - 08-17-2022 12:34 AM

Hi all.

I know turning the 65 off & on restores the top row functions. How do you restore top row functions after clearing program memory?

Thanks

RE: HP-65 Top row functions - Gene - 08-17-2022 12:39 AM

If you have cleared program memory, then just turn it off and back on.

RE: HP-65 Top row functions - teenix - 08-17-2022 01:06 AM

Every time you switch the HP-65 on, the firmware enters a small program for each of the function keys and matches the alternate functions written above them. You can see the steps in PRGM mode with the SST key.

Code:

LBL

A

g    1/x

4

RTN

LBL

B

f    sqrt

9

RTN

LBL

C

g   Yx

5

RTN

LBL

D

g ROLDN

RTN

LBL

E

g X<>Y

RTN

cheers

Tony

RE: HP-65 Top row functions - Matt Agajanian - 08-17-2022 03:48 AM

Hi. I see. Thanks for the clarification.

RE: HP-65 Top row functions - Dave Britten - 08-17-2022 05:06 PM

(08-17-2022 12:39 AM)Gene Wrote: If you have cleared program memory, then just turn it off and back on.

The other option would be to write that default program to a card. Don't know why anybody would waste a card on that though! Smile

RE: HP-65 Top row functions - pauln - 08-17-2022 05:26 PM

Does the HP-65 copy the default program from the firmware into RAM (and therefore occupying precious steps)?

RE: HP-65 Top row functions - AndiGer - 08-17-2022 07:12 PM

(08-17-2022 05:26 PM)pauln Wrote: Does the HP-65 copy the default program from the firmware into RAM (and therefore occupying precious steps)?

Yes, it does. Therefore before you start programming you execute CL PRGM to get your full 100 program steps.

RE: HP-65 Top row functions - AndiGer - 08-17-2022 07:20 PM

To save one step if you code carefully we discussed here:
https://www.hpmuseum.org/forum/thread-4937-post-79096.html#pid79096
Label not found - calculation/program starts at top of memory ;-)