Crash when Solve for Integral with 15C

[Joe Horn]

Speeding up integrals by controlling integration accuracy by adjusting the display setting goes back to the very beginning:

"Numerical integration was also new to the HP-34C. ... The user could adjust the time spent integrating by telling the calculator how many digits were significant. This controlled the integration step size and was done by simply setting the display format to show no more digits than required in the final answer. The Manual devoted a 32 page appendix to a more detailed description of the integration function."

-- excerpt from the HP-34C page at the famous, fabulous Museum of HP Calculators.