HP-12C Platinum Version 02 calculator
This is the two CR2032 3V button cell model.
Self Test procedure 1.
Press g + ENTER + ON; Release g + ENTER; Release ON: Displays "1.L 2.C 3.H 4.Cpu"
Press 1 (LCD test): Displays all LCD segments ON.
Press 2 (System test): Displays "Che - - 564Ah" (ROM Checksum?)
Press ENTER: Displays "Ver 02" (Platinum Version 02?)
Press ENTER: Displays C 2004 hP" (Copyright 2004 HP?)
Press 3 (Keyboard test): Image not available.
Displays all all LCD segments ON and will shut down them when pressing the corresponding keys)
Press 4 (CPU speed): Displays "3941092 h2" (CPU speed of 3.94 MHz ?)
The value will change in the last 3 digits between test runs.
Self Test procedure 2.
Press / + ENTER; Release / ; Release ON (Keyboard test):
Press all the keys from left to right and from top to bottom.
At the end will display "12".
Self Test procedure 3.
Press x + ENTER; Release x ; Release ON (System test):
It runs for about 25 seconds and then shows all LCD segments ON.
This is the two CR2032 3V button cell batteries installed in parallel.
How fast is the processor?
Ref. information here:
Quoting Gene Wright:
Enter this looping program. Press:
shift GTO 001
1 ENTER ENTER ENTER ENTER CLX shift GTO 000R/S and let it run for 60 seconds. The number in the display is the important one.
My calcyulator gives me a total count of about 1400.
So it doesn't seems to be using the faster ARM processor...
Powered ON, Idle state: 10uA
Powered Off: 0 uA
Running the looping program from above: 1.4mA