ENHANCING SCREEN DISPLAYS FOR THE IBM-PC

Both monochrome and color displays available with IBM Personal Computer (PC) are considered. After a brief comparison of their features it is demonstrated how a program called Screen can be used to take full advantage of both monitors' capabilities and simultaneously adapt them to one's own needs. This set of easy-to-use enhancements is implemented as a short resident routine that is transparent to applications programs and the DOS (disk operating system). It is shown how graphics can be created using the monochrome monitor for reference. Three functional blocks of Screen are described: program initialization, screen interception, and keyboard interception.