Simple DOS COM game template with timer and keyboard interrupts

Run makecom.bat in DOS to build main.com. Target CPU is set to 8086. The batch file can be easily changed to build a real mode EXE.

The main loop in main.c looks like this:

while (!quit) {
    update_time();
    update_input();

    // TODO: Do game logic and simulation here

    vga_vsync();

    // TODO: Draw here

    print_time_and_fps();
}

Tools needed:

• Open Watcom 1.9: https://github.com/open-watcom/open-watcom-1.9/releases
• NASM: https://www.nasm.us/pub/nasm/releasebuilds/

Useful:

• DOSBox-X: https://github.com/joncampbell123/dosbox-x/releases