Freshmeat page: http://freshmeat.net/projects/casmsim/
CASMSIM is a microassembler and simulator package for the Classic series of HP handheld calculators. It currently simulates the HP-35 and HP-45 scientific, HP-55 programmable scientific, and HP-80 financial calculators. The necessary microcode is included.
CASMSIM has been replaced by Nonpareil, which now supports multiple processor architectures. Initially Nonpareil adds support for the Woodstock series HP-25.
This project has the following developers:
New HTML Parser: The long-awaited libxml2 based HTML parser code is live. It needs further work but already handles most markup better than the original parser.
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If you're a C programmer with some spare time, take a look at the mod_virgule project page and help us with one of the tasks on the ToDo list!