Design of a computer: the Control Data 6600

60-bit word adder address register binary block transfer Boolean Branch instruction buffer carry-save Central Processor Central Storage chassis circuit circular buffer coefficient conditional Branch control point CPU registers DATA TRUNK Disk Storage double precision ECS Coupler example Exchange Jump execution exponent Extended Core Storage ferrite magnetic Fixed Add Unit floating point functional unit Increment Unit IND IND IND initial input operands instruction stack instruction word ISSUE load Logical Difference magnetic major cycles minor cycle module Multiply Unit nanoseconds normalized octal one's complement operating system output partial product PERIPHERAL PROCESSORS positive PPU storage PPU's primary storage program address Read Flag requires result register Return Jump right shift Scoreboard secondary storage shift count shift network shown in Figure sign bit signal six bits storage address storage location storage reference storage unit stored Stunt Box Subtract Sum of Xj tion transistor twelve-bit Xj and Xk Xk to Xi zero