14. OTHER PROGRAMMING OR OPERATING INFORMATION OR RESTRICTIONS
stiffness matrix, mass matrix, and load vector generated are stored in A, a one-dimensional array of 6056 locations. If the matrices and vector generated require more than 6056 core locations, either random access extended core storage, random access mass storage disk files, or the equivalent is required. As the program is currently written, the mass storage calls WRITEC and READEC are used in conjunction with a CDC6635 extended core storage unit, and the mass storage calls OPENMS, WRITMS, and READMS are used in conjunction with the system disk files.
The required number of blocks needed to store the stiffness matrix, mass matrix, and load vector is set up as one file of information in extended core storage or in disk file storage. Extended core storage is sought first, and, if the file length exceeds the space available, the file is placed in disk storage. Each block comprises 6056 core locations, located in the array A when in the core of the computer. The mass storage calls allow any number of words to be transferred to or from the file starting at any point in the file. The result is a randomly-accessible file. Any block is accessible at any time. The random access feature is required in the assembly of the stiffness matrix, mass matrix, and load vector in MERGEX. The time integration in INTEGX uses the file sequentially.