jwdpmi

This library aims to be a complete development framework for DPMI (32-bit DOS) applications, written in C++20.
It's still in the experimental stage. Anything may change at any time.

Features

Current features include:

• Idiomatic C++ interfaces to access most DPMI services.
• Interrupt handling, including dynamic IRQ assignment, IRQ sharing, and nested interrupts.
• CPU exception handling, also nested and re-entrant.
• Automatic translation of CPU exceptions to C++ language exceptions.
• Cooperative multi-threading, implementing std::thread.
• Event-driven keyboard interface.
• Integrated GDB remote debugging backend.
• Access to PIT, RTC and RDTSC clocks using std::chrono interface.
• Yamaha OPL2/OPL3 driver with automatic channel allocation.
• Sound Blaster driver (all models).
• MIDI protocol implementation. (moved to jwmidi)
• VESA VBE3 graphics interface.
• Accurate analog game port driver.
• Serial port and MPU-401 driver with std::iostream interface.

Installing

First, you need a toolchain compiled with --target=i386-pc-msdosdjgpp, and djgpp's libc. An easy to use build script is available here:
https://github.com/jwt27/build-gcc

This library is meant to be integrated in your project, not installed system- wide. The only dependency is jwutil, and the most convenient way to install both is as submodules in your own project:

$ git submodule add https://github.com/jwt27/libjwutil.git ./lib/libjwutil
$ git submodule add https://github.com/jwt27/libjwdpmi.git ./lib/libjwdpmi
$ git submodule update --init --recursive

If you use jwbuild, simply add the following to your configure script, and you're all set:

add_submodule lib/libjwutil
add_submodule lib/libjwdpmi --with-jwutil=$(pwd)/lib/libjwutil

For other build systems, you need some way to call the configure script, and then the cxxflags and ldflags files in the build directory contain all flags you need to compile and link.

Using

See the wiki page, where I'm slowly adding documentation.
Read the header files in include/, most functions should be self-explanatory. The detail namespaces contain implementation details, you shouldn't need to use anything in it (file a feature request if you do).

License

It's GPLv3, for now. I may decide to move to a different (less restrictive) license in the future. Therefore I am unable to accept code contributions at this time.