I'm new to the MoHPC forum as well!

[StaufRL2024]

My name is Rick. I love HP RPN calculators! Recently, a neighbor who once worked for Hewlett-Packard informed me that she had lots of calculators and that she would give me one. I was so excited. I used to have a HP 41cv. I was hoping that the calculator she would give me may have been a 41cv. But it was a HP 12 c platinum. But still, I was quite excited. I want to write a personal finance cash flow program. I was hoping for the ability to write intrinsic functions and or stack commands ( g gto rcl r# ). Since I discovered that the hp 12 cp does not support these kinds of commands, I performed a conditional branch test to determine what memory register was entered by the user as part of the preliminary stack register input. I performed small kernel programs to test my simple program idea. But when it came to implementing the program into program memory, I discovered that the g gto function did not work. I then went on line to find out what I may do to test the calculator. I then performed a key test which verified that all keys were operable. So I'm thinking that this may be a s/w issue. Am I correct in thinking that there may be a s/w defect and if so is there a way to perform a s/w update? Respectively glad to be a guest at this forum.

[AnnoyedOne]

(12-05-2024 11:28 PM)StaufRL2024 Wrote:  But when it came to implementing the program into program memory, I discovered that the g gto function did not work.

The HP-12C uses two digits for GTO's (e.g. GTO 00) whereas the Platinum uses three (e.g. GTO 000). I doubt that there's a firmware issue in your 12C Platinum. A "finger" (entry) error is more likely IMO. I'd try a very simple program as a test. e.g.

Code:


000 1
001 +
002 GTO 000

(12-05-2024 11:28 PM)StaufRL2024 Wrote:  is there a way to perform a s/w update?

No. None of the current 12C Platinum models can be updated. 12C's made since 2015 can be.

My advice is to read, read, and read some more. Then ask questions.

https://www.hpmuseum.org/forum/thread-22157.html

A1

[Eddie W. Shore]

Welcome, StaufRL2024! We're glad you're here.

I agree with AnnoyedOne's answer.

The HP 12C really was not designed to have regular software upgrades. Perhaps in future hardware revisions?

[AnnoyedOne]

(12-06-2024 02:17 PM)Eddie W. Shore Wrote:  The HP 12C really was not designed to have regular software upgrades.

The Platinums/Prestiges weren't. No way to update them.

Since 2008 the 12C's have been updatable. That last occurred in 2015 when the hardware was changed yet again.

Nothing since. VoyagerSave functionality could be easily added, per the HP-15C CE, but so far nothing on that front

A1

[rprosperi]

Welcome to the MoHPC Forum, a friendly place with lots of smart and helpful people.

I suspect your device is fine, the 12CP is quite reliable. The above advice is good, and IMHO probably the best place to start reading is the 12CP User's Guide, available in PDF here:

https://literature.hpcalc.org/items/71