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 * [MP3 test directory](https://git.libre-soc.org/?p=openpower-isa.git;a=tree;f=media/audio/mp3;hb=HEAD)
 * [Machine-readable executable Power ISA 3.0 pseudocode](https://git.libre-soc.org/?p=openpower-isa.git;a=tree;f=openpower/isa;hb=HEAD)
 
+# Prerequisite installation
+
+pypowersim is part of the
+[openpower-isa](https://git.libre-soc.org/?p=openpower-isa.git;a=summary)
+repository.  It is easiest installed with the [[HDL_workflow/devscripts]].
+
+*Note: installation time without following the scripts has typically taken
+new users 2-3 weeks. After much pain and failure, when they then follow the
+advice given (formerly ignored), they find it takes under 1 day*.
+
 # Pypowersim Guide
 
 These are multimedia tests intended to cover the inner loops of various