There is a fork with that available. as posted below: For anyone that wants a physical version, SwissMicros makes a calculator based off of Free42: https://ww

There is a fork with that available. as posted below: For anyone that wants a physical version, SwissMicros makes a calculator based off of Free42: https://www.swissmicros.com/product/dm42 https://www.swissmicros.com/product/dm42 That website mentions that they use decimal floating point. Since free42 is licensed under gpl3, they have released the source. https://github.com/swissmicros/DM42PGM/tree/master/lib https://github.com/swissmicros/DM42PGM/tree/master/lib https://github.com/swissmicros/free42/tree/master/inteldecimal https://github.com/swissmicros/free42/tree/master/inteldecim... They use Intel's library for decimal floating point: https://software.intel.com/en-us/articles/intel-decimal-floating-point-math-library https://software.intel.com/en-us/articles/intel-decimal-floa... It's still not the real HP-42S with its quirks, but it's nice to have decimal floating point operations.