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HP-65 Top row functions
08-17-2022, 12:34 AM
Post: #1
HP-65 Top row functions
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
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08-17-2022, 12:39 AM
Post: #2
RE: HP-65 Top row functions
If you have cleared program memory, then just turn it off and back on.
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08-17-2022, 01:06 AM (This post was last modified: 08-17-2022 01:07 AM by teenix.)
Post: #3
RE: HP-65 Top row functions
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
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08-17-2022, 03:48 AM
Post: #4
RE: HP-65 Top row functions
Hi. I see. Thanks for the clarification.
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08-17-2022, 05:06 PM
Post: #5
RE: HP-65 Top row functions
(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
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08-17-2022, 05:26 PM
Post: #6
RE: HP-65 Top row functions
Does the HP-65 copy the default program from the firmware into RAM (and therefore occupying precious steps)?
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08-17-2022, 07:12 PM (This post was last modified: 08-17-2022 07:12 PM by AndiGer.)
Post: #7
RE: HP-65 Top row functions
(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.
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08-17-2022, 07:20 PM
Post: #8
RE: HP-65 Top row functions
To save one step if you code carefully we discussed here:
https://www.hpmuseum.org/forum/thread-49...l#pid79096
Label not found - calculation/program starts at top of memory ;-)
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