Download or read book TRS-80 Disk and Other Mysteries written by Harvard C. Pennington and published by Blue Cat. This book was released on 1979 with total page 140 pages. Available in PDF, EPUB and Kindle. Book excerpt: Hexadecimal - binary - decimal. Reading & using Superzap 2.0. Other utilities. Operating systems. Disk organization. The directory. Passwords & other trivia. Data recovery procedures & techniques. Files - structures & types. Data recovery. Recovering 'electric pencil' errors. Correcting the gat & hit sectors. Som things you can do. Level II 'Basic' tokens. TRSDOS 2.2 directory hex dump. New DOS 2.1 directory hex dump. VTOS 3.0 directory hex dump. Disk drive maintenance. Suggested reading. Murphy's law & other corollaries. Ordering new DOS & Superzap. "Search" program documentation.