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About go41cx

A scientific calculator based on the classic HP 41.

For a special tablet edition look for go41cxt

Don't forget to get the manual (pdf file) at http://sites.google.com/site/olivier2smet2/home/go41cx

On Android 4.4 device, import/export directory is now /Android/data/o2s.emul.hp41cx/files/... instead of /go41cx/...
On S5 devices, long press the right hardware button to get the menu.

v1.8.1
- menu is displayed when touching annunciators zone on the emulated LCD

v1.6.4
- import bug from kitkat corrected

v1.6
- state file save now modules
- new lib#4

v1.5
- new skin
- forth 8K module support (only in CV mode, not supported on CX)
- lib#4 from A. Martin support
- lcd lowercase display (roms are patched)
- all import/export now use '/go41cx/...' directory instead of '/Download' on your sdcard (usually '/mnt/sdcard/'), export again all your files to recreate it.
- haptic feedback added (activate it in your device).
- short manual to explain all the behaviour (see at http://sites.google.com/site/olivier2smet2/home/go41cx ).
- new basic skin (like the first release).
- some interface changes (new really hard reset).
- partial card reader support (only hp67 emulation functions, no hardware, see http://www.hpmuseum.org/cgi-sys/cgiwrap/hpmuseum/archv006.cgi?read=10774)
v1.4.0 upgrade: change of state file format, EXPORT your raws and xmem before upgrade if possible (MEMORY LOST at start).

Sound added, inline help (tap left of display), text overlays working again (use with 'black_o' graphics overlay or 'opt001' skin), ADV printer working (tap right of display), Config with _o.txt overlay files (tap middle of display).

Full HP 41 CX/CV emulator:

- Full memory and X memory.

- Timer functionnal, but accuracy not well tested (AF is not emulated).

- Manage states, overlays, raw prgms, xmem, ...

- Automatic save and load of state.

- Download modules, raws, from internet, then use 'import'.

- Use MOD modules, RAW programs format.

- You can put modules, raws, overlays, xmems, states in 'Download' directory of your SD card.

- 'ON' only active on 'longtouch' to avoid mistakes.

- Master clear supported (use 'press back' menu when calculator is off then press 'ON', then press 'back' to release it).

- Speed greater than 1 are not patched for 'PAUSE' ...

- Hepax support up to 4 * 8KW modules

- Top status line for Stack, Alpha ... display (tap on it to change it).

Avoid checking 'force gpu rendering' in developer option in android 4.x prefs, this leads to graphic problems.

Emulator loosely based on Non-Pareil from Eric Smith, font by Luiz C. Vieira.

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Frequently Asked Questions(FAQ)

What is go41cx?

go41cx is a scientific calculator based on the classic HP 41.

Where can I find the manual for go41cx?

The manual for go41cx can be found at http://sites.google.com/site/olivier2smet2/home/go41cx.

How can I import/export on an Android 4.4 device?

On an Android 4.4 device, the import/export directory is now /Android/data/o2s.emul.hp41cx/files/... instead of /go41cx/...

What should I do on S5 devices to access the menu?

On S5 devices, long press the right hardware button to access the menu.

What is the latest version of go41cx?

The latest version of go41cx is v1.8.1.

What bug was corrected in version v1.6.4?

The import bug from KitKat was corrected in version v1.6.4.

What are the features in version v1.6?

Version v1.6 includes state file save now modules and new lib#4.

What features were added in version v1.5?

Version v1.5 includes a new skin, forth 8K module support (only in CV mode), lib#4 from A. Martin support, lowercase display for the LCD, all import/export directory changes, haptic feedback, and a short manual.

What partial card reader support is provided in go41cx?

go41cx provides partial card reader support, including hp67 emulation functions, but no hardware support.

What was changed in the state file format in version v1.4.0?

The state file format was changed in version v1.4.0. Users are advised to export their raws and xmem before upgrading to avoid memory loss.

What additional features were added to go41cx?

Sound was added, inline help is available by tapping left of the display, text overlays work with certain graphics overlays or skins, and the ADV printer is functional. The overlay files can be configured with Config and multiple modules and raw programs formats are supported. The calculator also supports automatic save and load of state and the ability to download modules and raws from the internet.

What are the features of the full HP 41 CX/CV emulator?

The full HP 41 CX/CV emulator includes full memory and X memory, timer functionality, state management, overlay support, raw programs, and xmems. It also allows for the download of modules and raws from the internet. 'ON' is only activated on 'longtouch' to avoid mistakes. Master clear is supported and speed greater than 1 is not patched for 'PAUSE'. The emulator also supports Hepax up to 4 * 8KW modules and has a top status line for Stack, Alpha, and other displays.

What should I avoid doing on an Android 4.x device?

Users should avoid checking 'force gpu rendering' in developer options in Android 4.x preferences, as this can lead to graphic problems.
author
Works just like the original
Vanildo Maldi
author
😂 The calculator functions ok . But the most bottom keys (end row) gets slightly cut off , on the oppo A5 2020. Please try to make it right in your updates . For the present, my problem is solved. Guess how...
Kabita Barua
author
Great app, thanks s lot!
Otto De La Torre
author
Great calculator
W M
author
Several recent reviews have mentioned that with version 1.8.1 the bottom of the HP-41CX keyboard is obscured by the Android navigation bar. To fix this, tap on the bottom of the HP-41CX display to display th...
Doug Hansen
author
Best 41C emulation app ever. Since the March 2020 update, aside from the overlapping bug, the overlays stopped working too. Hope for an update soon. Olivier, publish a donate button, I would gladly contribut...
Andres Gazso Hazos