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Download Now. Developer's Description By Thgsoft. Full Specifications. What's new in version 1. The first was a full four-level stack for RPN calculations on complex numbers. On earlier HP calculators, complex arithmetic was carried out by storing the real and imaginary parts of just two complex numbers on the 4-level stack. On the HPC a second stack which carried the imaginary parts of four complex numbers was added instead. This could be disabled to save memory, which was limited, especially since the other innovation was that matrix arithmetic commands were provided.
Memory was also used temporarily for internal calculations by the Store and the Integrate commands - as well as for ordinary storage of programs and date. Indeed the HPC included some quite clever memory control to deal with all this.
Yet another innovation was the provision of all possible conditional tests, comparing the contents of the X register with either the Y register or the number zero. Their answer was that the HP32SII provides all the functions of the HPC, and more, and that reintroducing an old calculator is as expensive as making a new one from scratch.
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