MODCLK

This document, identified as DECUS No. 12-16, contains the program library write-up and source code for 'MODCLK'. Authored by Stephen J. Mayor from the Medical College of Ohio at Toledo in November 1970, the program is written in LAP6-DIAL for the PDP-11. Its purpose is to test the KW-12 clock functionality. The program utilizes sense switches to select different clock frequencies and drives the teletype bell at corresponding rates. The document includes a detailed listing of the program source code with annotated comments explaining the operations, register usage, and constant definitions.