x48ng -- HP48 CPU emulator

(I'm not very good at writing, see ./README_0.6.4 for the original README)

This is my fork of x48-0.6.4 where I deviate from the original code and do my own thing.

What have I done:

0. renamed it to x48ng to avoid confusion
1. merged in a SDL1 version I found @ https://code.google.com/archive/p/x48-sdl/source/default/source
2. removed the code supporting Solaris, HP-UX, etc.
3. removed the autotools-based build system and wrote a simple Makefile instead
4. added a x48ng.desktop file and an icon
5. refactoring as a way to explore/understand the codebase

Bugs to fix

See https://github.com/gwenhael-le-moine/x48ng/issues

What more I would like to do:

short term

• make different gui switchable at runtime
• port from sdl1.2 to sdl2
• add an text UI (ncurses & drawille)

long(er) term

• GUI in gtk(4)?
• support the HP49g ROM?

Compilation

Dependencies (see .github/workflows/c-cpp.yml for debian packages names)

• readline

for SDL version:

• SDL_gfx1
• SDL 1.2

for x11 version:

• x11

Installation

1. Run sudo make install PREFIX=/usr DOCDIR=/usr/doc/x48ng MANDIR=/usr/man DESTDIR=/tmp/package filling in your own values for PREFIX, DOCDIR, MANDIR and DESTDIR.
2. once installed run /usr/share/x48ng/setup-x48ng-home.sh to setup your ~/.x48ng/. It sets up a HP 48GX with a 128KB card in port 1 and a 4MB card in port 2
3. run x48ng and enjoy

Development

• make FULL_WARNINGS=yes to compile with all warnings
• make clean and make mrproper to clean between compilation runs
• make pretty-code to format the code using clang-format and the provided .clang-format

Friends and inspiration

• https://github.com/gwenhael-le-moine/x48 (original x48 slightly touched but not too much)
• https://github.com/shagr4th/droid48 (x48 ported to Android)
• https://hp.giesselink.com/emu48.htm (The Emu48)
• https://github.com/dgis/emu48android (Emu48 ported to Android)
• https://github.com/gwenhael-le-moine/jsEmu48 (another HP 48 emulator)