Rainbow MS-DOS V2.05 Technical Documentation

This technical documentation is intended for experienced programmers developing software for the Rainbow 100 series computers. It includes information on hardware, firmware (ROM calls), MS-DOS V2.05 system operation, extended BIOS functions, and specific programming notes comparing the Rainbow to the IBM PC. The document also provides a guide to Rainbow on-disk structures and a list of recommended reading materials, along with technical listings and guidelines for producing translatable products.