Running out of labels on HP-15C

[Matt Agajanian]

(08-25-2023 02:55 AM)Steve Simpkin Wrote:  

(08-25-2023 12:35 AM)Matt Agajanian Wrote:  Will do. Thanks!

Here is information about the additional firmware "Modes" available in the HP-15C CE.

The HP-15C CE contains 3 firmware version "Modes" in its Flash memory. These are labeled 15C, 15.2C and 16C.

15C mode is the "normal" HP-15C mode (with 672 bytes of memory).

15.2C mode has even more memory available (approx. 1300 bytes).

16C mode operates as a HP-16C calculator (note the key labels do not match what is printed on the HP-15C so an overlay and keys stickers would be required to easily use this as a HP-16C calculator).
Note the extra 15.2C and 16C modes are not supported by the manufacturer.

To switch firmware "Modes", start with the calculator Off
Press and hold [g] and [ENTER]
Press [ON]
On screen: 1.L 2.C 3.H
Press [4]
On screen: 15 15.2 16

Then:
Press [e^x] or [10^x] -> 15C mode
Press [y^x] or [1/x] -> 15.2C mode
Press [CHS] or [7] -> 16C mode

Seems essential to keep in mind! Thanks!