IBM System/360 Principles of Operation, 1964. https://books.google.com/books?id=OjUyDwAAQBAJ&pg=PA1028&lpg=PA1028&dq=File+No.+S360-01+ibm+360&source=bl&ots=VLz

IBM System/360 Principles of Operation, 1964. https://books.google.com/books?id=OjUyDwAAQBAJ&pg=PA1028&lpg=PA1028&dq=File+No.+S360-01+ibm+360&source=bl&ots=VLzlgPhVgC&sig=ACfU3U1EeYlMCF0Uind-L4qf7KT_vWeQhw&hl=en&ppis=_c&sa=X&ved=2ahUKEwjXwIqPht7lAhUX7J4KHY0TAg8Q6AEwCnoECAkQAQ#v=onepage https://books.google.com/books?id=OjUyDwAAQBAJ&pg=PA1028&lpg...