There are many resources for documentation about the project.
Here is a quick tutorial to get you started with DB48X.
Try the following key sequence, where you need to hit the Shift key as a separate key, and observe what happens with each key:
| Key to type | What happens |
|---|---|
| F | Enter expression |
| Shift | Left Shift |
| ENTER | ALPHA mode |
| X | Enter variable name X |
| ENTER | Put X on the stack |
| ENTER | Duplicate X |
| 3 | Enter number 3 |
| . | 3. |
| 4 | 3.4 |
| 2 | 3.42 |
| * | Put 3.42 times X on stack |
| J | Compute sin(3.42·X) |
| M | Swap stack levels 1 and 2 |
| K | Compute cos(X) |
| / | Compute sin(3.42·X)/cos(X) |
| Shift | Left shift |
| N | Select MODES menu |
| F2 | Select Radians mode |
| Shift | Left Shift |
| Shift | Right Shift |
| O | PLOT menu |
| F1 | Draw function |
Try the following key sequence, where you need to hit the Shift key as a separate key, and observe what happens with each key:
| Key to type | What happens |
|---|---|
| Shift | Left Shift |
| N | MODES menu |
| F2 | RADIANS mode |
| Shift | Left Shift |
| O | DISP menu |
| 2 | Enter number 2 |
| 0 | 20 |
| 0 | 200 |
| F6 | 200-digit precision |
| Shift | Left Shift |
| M | Last Arg (Recall 200) |
| F5 | 200 significant digits shown |
| 1 | Enter number 1 |
| Shift | Left Shift |
| L | Compute arc-tangent of 1 |
| 4 | Enter number 4 |
| * | Compute pi |
| Shift | Left Shift |
| . | SHOW function (show full screen) |
There is a video playlist on YouTube containing many demos, installation procedures, and more.
The reference documentation for the project is available online. It is the same content that is also installed on the calculator for the built-in help.
The project includes comparisons with other third-party firmware for SwissMicros calculators to help you pick a program that suits your needs best.
There is also a page highlighting the differences and similarities with the DM42.
There are active discussion forums on the museum of HP calculators web site, notbly a dedicated thread, and on the SwissMicros forum.
Keyboard overlays can be ordered to make it easier to use the firmware on a physical calculator.