DDA(ID:7496/)

Digital differential analyzer simulator 

Digital differential analyzer simulator
Related languages
DDA => DIAN   follow-up to
DDA => MOD IV   Evolution of
References:
  • Forbes, G F "Digital differential analyzers" G Forbes 13745 Eldridge Avenue Sylmar California 91342 4th edition 1957 view details
  • Forbes, G F "The system analyzer" 1(1) Fall 1961 view details
  • Forbes, George "An engineering simulator" view details Abstract: The engineering simulator These notes are for the Mod IV Engineering Simulator as used on the IBM 7040. The simulator is a digital differential analyzer designed primarily for ease of programming. Most items included have been checked out and actually used. The original version of this paper served as a user's manual.
          in [ACM] Proceedings of the 21st ACM National Conference 1966 view details
  • Crosby,H. A. review of Forbes 1966 (MOD IV, DDA) view details Abstract: The paper describes a simulator program which can used to simulate a Digital Differential Analyzer (DDA) an IBM/040. Its purpose is to allow a programmer who familiar with DDA programming techniques to be able to use the IBM computer without knowledge of digital programming.

    The author states that the paper was originally written as a user's manual; and, although it contains a detailed Sting of the simulator language, it is not clear or instructive. Over one- half of the paper is given to tables, diagrams, and a listing of a sample problem. Unfortunately, a statement of what problem is being solved is never given.

    With the many simulation languages available to solve differential equations directly on a digital computer, it does not seem reasonable to this reviewer to go to the difficulty of programming a problem for the differential analyzer. It is erroneously stated in the paper that the DDA represents an engineering model rather than a computer solution, and that the use of the DDA is the engineering approach. The DDA may be an excellent tool, but it certainly does not have the attributes claimed in the paper.
          in ACM Computing Reviews 8(01) January-February 1967 view details