DOS 4.5 Volume and File Disk Management System Second Edition

This publication describes the products that Walland Philip Vrbancic, Jr., created for his beloved Apple ][ computer. He is an Electrical Engineer, an Aerospace Senior Systems Engineer, and a Professional Programmer since 1983. After he retired in 2011, he designed and programmed an enhanced Disk Operating System for his Apple ][+ and Apple //e computers in order to manage his hundreds of Volumes and Files. Mr. Vrbancic has included source code samples, schematic diagrams, equations, figures, tables, and representative screen shots in order to help explain what he has created and the reasons why he did so. As in his previous Apple ][ DOS publications, this has been another incredible journey for him. With DOS 4.5 in particular, he has again re-imagined that time when he mostly lived, breathed, and worked on Apple ][ hardware and software development continuously for a good period of his life many, many years ago. The list that follows are some of the ingenious and powerful features that Mr. Vrbancic has engineered into his Second Edition of the DOS 4.5 Volume and File Disk Management System.DOS 4.5 Build 06 boots directly into Language Card memory and sets HIMEM to 0xBE00. All five file buffers in DOS 4.5.06 are always available to programs and they are fully contained in Language Card memory.Mr. Vrbancic has completed the full integration of the Lisa and the Big Mac assemblers into Auxiliary Memory and they both utilize and are supported by DOS 4.5.06 resources. Also, he has added additional program logic to both assemblers so that now they both support the complete 65C02 instruction set. He has also fully integrated both Sourceror and Big Mac and now they both support all SWEET16 opcodes. His newest C0:FF Apple //e ROM image is totally compatible with DOS 4.5.06 and this ROM image now fully supports the 65C02 processor, SWEET16, and his phenomenal GARBAGE routine which is based on Bongers’ specification. His full IOSPACE ROM image also includes his new HLIN routine which draws perfect HIRES line graphics for his celebrated ICON Maker tool that can be paired with his HIRES CHAR Editor and LENGTH tools in order to create stunning graphic presentations like those that are utilized in his Binary File Installation or BFI software program tool and for all of its on-screen menus and its final installation report. His ROM image only supports the READ command in order to process c2t high frequency audio files that utilize the cassette input port.