Demonstration Model System. Volume V. Slide-Rule Model System User's Guide,

The Level I Slide-Rule Cost Model System is implemented on a Texas Instruments TI-59 programmable calculator coupled to a TI-PC-100A PrintSecurity Cradle. The model system consists of four linked programs, the Top-Down Model, TDM the Lowest Removable Assembly Model LRAM, the System Aggregation Model SAM, and the System Confidence Model SCM. Each program and its data input sets are stored on magnetic cards. The output of each program is used as input to succeeding programs, together with additional input data. The TI-59 has 120 programdata registers, which can be partitioned as desired between program instruction steps and data memory registers. When the calculator is turned on, 60 memory registers are automatically reserved for data storage. All programs other than the TDM use the default allocation. The TDM, however, uses only 40 registers for data storage the remainder is used to store the program code. Therefore, when running the TDM, the first step after turning on the calculator will be to repartition the memory registers.