PX-41CX Customizer

Load a PX-41CX HEX file and change its splash image, font table, text and modules. Then download the modified HEX file or flash it straight into the calculator.

Latest firmware
1

Load Firmware

A PX-41CX firmware HEX file

Drag & drop your PX-41CX HEX file here, or

2

Modules

ROM modules in the firmware. Drag a group to move it to another slot, or drop .MOD files here.

Load a HEX file to see its modules.

3

Graphics

Click an image to save it as PNG, edit it, then load it back.

Splash Image

250 × 122

PNG or JPG, exactly 250 × 122 pixels. Converted to black and white.

Small Font Map (12×8)

128 × 96

PNG or JPG, exactly 128 × 96 pixels.

Main Font Map (24×14)

224 × 192

PNG or JPG, 224 × 192 pixels (or 240 × 192 with a gap after each character).

4

Text

Type \xNN for characters you can't type, e.g. \x7F.

Info Strings up to 31 characters

Load a HEX file to edit the strings.

Month Names 3 characters

Load a HEX file to edit the month names.

Day Names 3 characters

Load a HEX file to edit the day names.

5

Flash PX-41CX

Works in Chrome, Edge or Opera on a desktop computer.

Writes the loaded HEX file directly into the calculator through a SerialUPDI adapter (USB-serial adapter). This replaces the firmware in the calculator. Use the HEX file for your board (DA28 / DA32) and display.