jwdpmi_test

This repository contains several applications to test and demonstrate the use of jwdpmi. It also serves as a project template to start developing and debugging DPMI programs in Visual Studio.

Test programs:

hello

A simple "Hello World" application.

game

A basic video game where you control a character using the joystick or keyboard. Demonstrates the use of timers, vectors, remapped DOS memory, keyboard and joystick, etc.

vbe

Displays an animation with real-time alpha-blending, using both integer (MMX) and floating-point (SSE) math. Demonstrates the VBE graphics interface and pixel layout structures.

keys

Application to test keyboard functionality.

ring0

Application to test ring 0 access.

To build:

• Build and install gcc with --target=i386-pc-msdosdjgpp.
• Clone this repo with its submodules:

$ git clone https://github.com/jwt27/jwdpmi_test.git
$ cd jwdpmi_test/
$ git submodule update --init --recursive

• Configure:

$ mkdir build/
$ cd build/
$ ../configure --host=i386-pc-msdosdjgpp

• Build:

$ make -j all                       # build all subprograms
$ make -j hello                     # build only "Hello World"
$ make -j hello FDD=/media/floppy   # build "Hello World" and copy it to a floppy disk

To build with Visual Studio:

• Install Visual Studio 2019 and MSYS2.
• Build and install the toolchain with mingw-w64.
• Build and install gcc2vs with mingw-w64.
• Make sure your Windows %PATH% has access to bash and your Bash $PATH can access the toolchain.
• From a mingw-w64 shell, run ./vs-configure.sh to generate project files.
• Open this project in Visual Studio by selecting "Open Folder".
• Select a build configuration from the dropdown menu on the toolbar.
• Right-click any .cpp file in the top-level src/ directory and select Build.

To debug with Visual Studio:

I can no longer get this to work with recent Visual Studio versions :(