Why is the CPU a 4 MHz Saturn, unchanged from the HP48G?
• The CPU is still a Saturn because of the huge cost and time related to using a new CPU. The operating system would have to be completely rewritten from scratch wasting the efforts of the last 15 years. It took over 200 engineer years to finish the HP48 alone! It took TI five years to create the TI-92 (according to the TI-92 project manager), with its 68000 processor, a new CPU for TI to use in a calculator at the time. Using a new CPU would delay a new calculator by another three to five years. • The CPU is still at 4 MHz for both technical and practical reasons. One German company runs the Saturn at 6 MHz by overclocking it, but it uses up batteries twice as quickly. Also, the Saturn chip was only rated for up to 2 MHz when it was used in the HP48S series. HP already overclocked it to 4 MHz for the HP48G series, so overclocking it further would be way beyond specifications. Because HP wanted a quality product, it was not overclocked again. To increase the tolerance of the CPU to mak
