4.1 MINIMUM HARDWARE REQUIREMENTS
4.1.1 Requirements for Execution on a PC
The ISC models were developed on an IBM‑compatible PC, and were designed to run on PCs with certain minimum hardware requirements. The basic requirements are as follows:
· 80x86 processor (e.g., 8086, 80286, 80386, 80486)
· 640 K of RAM
· Hard Disk with sufficient storage space to handle the executable file, input data files, and output files (file sizes will vary, generally about 2 MB will be sufficient for routine applications)
While a math coprocessor (80x87 chip) is optional for execution of the DOS versions of the ISC models on a PC, it is highly recommended, especially for the ISCST model, due to the large increase in execution speed that will be experienced. The model may be expected to run about five to ten times faster with a math coprocessor than without one. The DOS models are compiled using an emulator library, meaning that a math coprocessor will be used if one is present, but the models will also run without one.
The ISC models were designed assuming a PC with a minimum of 640 K of RAM, with the minimum amount of available RAM for loading the various models (as provided on the SCRAM BBS) of about 510 K. Because additional memory is needed (for buffers) when the models open files (such as the input runstream file, the printed output file, the error message file, etc.), the amount of memory needed to actually run the models will be somewhat larger than the minimum load size for the executable file. Depending on the number of externally files being used for a particular application, an additional 10K of memory may be required.
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