1. About this User Manual
This user manual refers to special features of DM41X. PDF version of this manual is available at
https://technical.swissmicros.com/dm41x/doc/dm41x_user_manual.pdf.
Search internet for documentation of original HP-41C calculator and related modules and utilities.
Especially useful is HP41.org site, where manuals could be viewed on-line and/or downloaded
complete DVD for off-line access.
Other sites with manuals:
• https://archived.hpcalc.org/greendyk/
• https://qrg41.fjk.ch/index.html
Many thanks to Robert Prosperi and Ángel M Martin for contributions to DM41X project and this
manual.
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