Determining the Physical Address of a Block Within a Disk File

This technical document, titled 'FNDBLK', details the steps and logic required to translate a relative file block index into its physical disk block address.

Key sections include: * Introduction: Defining the goal for non-privileged programs. * Procedure steps: * Reading the HOME block to extract system-specific pointers (logical unit numbers, cluster information). * Accessing the Retrieval Information Block (RIB) of the target file. * Scanning retrieval pointers to locate the requested relative block, including handling unit-change pointers. * Example Code: A MACRO-11 assembly program demonstrating the implementation of this logic for a specific file.

The document is dated January 5, 1972.