KW12 Real Time Clock

This document is a technical seminar guide for the KW12 Real Time Clock option for the PDP-12 computer. It describes the clock's hardware components, including the variable time base, pulse generator, counter register, buffer/preset register, and input synchronizers. The guide explains the various modes of clock operation, such as free-running and event timing, and details how the program can interact with the clock using registers and IOT instructions. Finally, it includes a subroutine setup package with instructions for initializing the clock, handling interrupts, and providing programming examples for common tasks.