RPN Advanced 42 manual · Chapter 18 of 18
Reference
Resetting memory, number range, precision, limits and the features this calculator does not include.
18.1Reset the calculator#
To erase the memory, use Reset in the app settings under Calculator. This clears the stack, registers, variables, programs, flags, modes and history of this model. Individual parts can be cleared with the CLEAR menu: statistics (CLΣ), a program (CLP), a variable (CLV), the stack (CST), the ALPHA register (CLA), X (CLX) and all registers (CRG).
18.2Number range, precision and limits#
| Item | Limit |
|---|---|
| Digits kept | 12 significant digits |
| Range | About to |
| Digits typed in one number | 12 |
| Stack levels | 4 (X, Y, Z, T) plus LASTx |
| Numbered registers | 25 (00 to 24) |
| Flags | 100 (00 to 99) |
| Names of variables and labels | 7 characters |
| ALPHA register | 44 characters |
| Program steps | Up to 9999 |
| Subroutine nesting | 32 levels |
| Matrix size | Up to 10000 elements; SIMQ up to 20 equations |
| Base mode | 36-bit integers |
| Factorial | Whole numbers up to 253 |
18.3What is not included#
The shifted keys 1, 2 and − and the shifted EXIT key are labelled on the keypad but do nothing in this app.
HP-42S is a trademark of HP Inc.. Trident Calculator is an independent product by South View Studios and is not affiliated with, sponsored by or endorsed by HP. The name is used only to describe the kind of calculator this model resembles; Trident's names, keys, display, fonts and software are its own clean-room design.