Fully free, multi-platform emulator of the DOS operating system, which can be used to run older programs and games that do not work properly or even do not run at all under new Windows systems. DOSBox emulates 286/386 processors (both in real and protected mode), XMS and EMS memory, graphics cards such as Hercules, CGA, EGA, VGA and VESA modes, Adlib music cards, Sound Blaster and Gravis Ultra Sound, modem, and supports serial port access. The latest version provides support for VESA 4/15/16/32bpp modes, improved VGA compatibility, added the ability to capture video to AVI files, improved screen refresh to improve speed, and much more.