Manual

TIME and Date

To set the time, date and alarms, use the HP-41CX intructions:

• SETIME to set the time

• SETDATE to set the date

• XYZALM to set an alarm

When an alarm is programmed, a small bell icon will appear next to the battery indicator.

PX-41CX MENU

To access the PX-41CX settings, press the MENU button.

Pressing the MENU or ON button on any screen, will exit and return to emulation mode.

Note: Emulation will freeze while in the menu settings.

DISP (Display)

Here you can select the various modes of displaying the registers.

The "Display X" mode will only show the X register, similar to the original HP41CX

DISP XY 

The "Display XY" mode will show the X and Y registers simultaneously.

DISP XA

The "Display XA" mode will show the X and A (Alpha) registers simultaneously.

DISP XYZT

The "Display XYZT" mode will show the X, Y, Z, and T registers at once, the full stack.

VIEW

The VIEW menu will quickly show you the value of the Registers and the Flags.

VIEW REGS

Here you can quickly view the SIZE setting and the value of all the registers.

The register values are formatted with the current display notation (FIX, SCI or ENG).
If a register has an ALPHA value, an 𝛂 will be display next to the alpha string.

VIEW FLAGS

Here you can see which flags are set. The bold ones indicate the flags that are currently active.

COM (comunications menu)

Here, you can communicate with your PC.

The PX-41CX USB Mini connector features a standard RS232 serial output. To utilize this function, you will need a serial-to-USB cable.

DUMP will output the entire memory (RAM) of the PX-41CX.
LOAD will restore the entire memory (RAM) of the PX-41CX.

The memory dump can be encoded/decoded using swissmicrosy DM41 programming tool or Pierre’s excel macros.

*Note: Make sure the slide switch in RUN mode.

MORE MENU

The MORE menu gives you acces to… more options.

CONF MENU

The CONFiguration menu lets you change the settings of several parameters.

BEEP MENU

When BEEP is ON, an audiable “beep" will be heard when you press a button.

SLEEP MENU

Choose the period of inactivity before the calculator enters sleep mode (turns off).

Note: Never sets autoshutoff timer to 4 min and 15 sec and sets flag 44.  Flag 44 resets after a power cycle.

SPEED MENU

Select the CPU speed, ranging from 8MHz to 32MHz. Note that higher speeds will consume more power and drain the batteries faster. This setting only affects the calculator during active calculations, not when it is idle or in sleep mode

MODS MENU

The HP-41C ROM area is divided into 16 pages (0-F).
Here, you can view the currently allocated ROMs in their respective pages.

ROMS MENU

The PX-41CX has space to store twelve 4K ROMs. A module can contain more than one 4K ROM.

Here, you can load and eject modules. Bold modules are loaded, while dimmed ones are not.

For changes to take effect, you need to power cycle the PX-41CX (turn it off and back on).

INFO MENU

On the info page, you can view the current battery voltage, firmware version, build date, and four custom lines of text.

To customize the text, you can use Darren's px41cx-utility.

FONTS

The PX-41CX has two sets of fonts:

• A 24x14 bitmap font used in the emulation.

• A smaller 12x8 bitmap font used for everything else.