saturnng/README.md

Emulator of the HP 48GX, HP 49, and HP 40

This is a fork of saturn v4.1.1.1 originally by Ivan Cibrario Bertolotti.

Original source are available at https://www.hpcalc.org/details/4382

The GUI has been replaced by a new one (taken from x48ng) in SDL2 and/or ncurses.

The main binary is dist/saturn with helpers/wrappers scripts available per model as:

• dist/saturn48gx
• dist/saturn48sx
• dist/saturn49g
• dist/saturn40g (not really functional (yet))

Building

Dependencies:

• SDL2
• ncursesw

make

Installing

make install DESTDIR=/

Using

Use the wrappers scripts.

The local data are stored under $XDG_CONFIG_HOME/saturn/

Known bugs

• some bugs in emulation:
  • 48gx: ON-D A can hang because it tries to write data in ROM space
  • 48gx: VERSION spouts messages in the console (but works)
  • 49g: spouts messages in the console every second (but works)
• ncurses UI: becomes unresponsive (but still quits gracefully on F7)

Todo

• fix emulation bugs
• 49g: find a way to enable the bigger screen (131×80)
• 40g: make emulation work
• sdl2 UI optimization: draw LCD on a distinct texture and then draw that texture on the main one