CGAArt is a program with two main functions:

1. Show mode - acts as an emulator for an enhanced version of an IBM CGA card. Given some data to put in VRAM of this card, shows what the ouput would look like on an RGBI or composite monitor, in one of many possible modes. In the composite case, both old and new CGA revisions can be emulated.

2. Match mode - given a 24-bit colour image, attempt to find the VRAM data that, when used as input to show mode, best reproduces this image.