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U.S. Department of Energy
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TECHNICAL PROGRESS REPORT. PART I. HIGH-SPEED COMPUTER PROGRAM. PART II. CIRCUIT RESEARCH PROGRAM. PART III. MATHEMATICAL METHODS. PART IV. SWITCHING CIRCUIT THEORY. PART V. ILLIAC USE AND OPERATION. PART VI. IBM 650 USE AND OPERATION. PART VII. GENERAL LABORATORY INFORMATION

Technical Report ·
OSTI ID:4180829

In continuing work on high speed computers, drawings of all special connections in the A/sub 40/(S/sub 40/) to Q/sub 4/(R/sub 4/) area w ere completed in detail, together with a block diagram of data flow. The basic design of the assimilator, comparators, and decode logic was completed. In the circuit research program, the flow-gating system was redesigned, the transient behavior of transistors was investigated, and high-powered drivers for plus or minus 1 v swings with 20 m mu s risetimes were designed. A method for evaluation of integrals by the reduction of roundoff error in floataing point quadrature is described. In switching circuit theory, codes for correcting errors in adjacent bits of a message were derived. The addition of a mixed number input routine aad monthly uses of the Illiac are reportod. Circuitry was installed in Illiac which enables the programer to use the 8 v N (input) orders as shift orders, enabling unbiased multiplication by 2, 4, or 8 via shifting. The addition of two routines, a two-digit frequency count and a comparison post mortera routine, to the IBM 650 library is reported. (For preceding period see AeCU--1650.) (C.J.G.)

Research Organization:
Illinois. Univ., Urbana. Digital Computer Lab.
NSA Number:
NSA-14-016938
OSTI ID:
4180829
Report Number(s):
TID-5972
Country of Publication:
United States
Language:
English