These files are for a version for RISC OS computers (formerly known as "Acorn" computers), which use ARM processors. To compile the speakmod module for RISC OS. 1. Run the "copysource" script to copy the source files from the general source.src directory into the riscos.cpp and riscos.h directories. These already contain the RISC OS specific files. 2. Run the Makefile to compile and link and produce the "speakmod" module. I used the AcornC/C++ compiler.