The Museum of HP Calculators


The HP-45 Microcode Simulator

This java applet simulates an HP-45 by running the actual HP-45 firmware on a java simulation of the HP-45 chip set.

Eric Smith originally created this application in C and X Windows in 1995 by piecing together the hardware design, as well as all the firmware by reading HP's calculator patents. From Eric's version, I made two changes:

Usage Notes

The source code is available under the GNU Public License. The zip file contains the Java code and the firmware listing.

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