Some programs still support some of the older embroidery design file types like PCM or BMC and can convert between each another. Embroidery programs like Embird can generally help you with this, but some dedicated embroidery converters could also work.
Convert Embroidery design file to Embroidery graphic file.
We have found 2 software records in our database eligible for .pcm to .bmc file format conversion.
Microsoft Windows software - convert pcm to bmc on Windows
A popular embroidery design and printing software
Convert from pcm file format
The tables with software actions are a good pointer for what a certain program does with various file types and often may give users a good hint how to perform certain file conversion, for example the above-mentioned pcm to bmc. However, it is not perfect and sometimes can show results which are not really usable because of how certain programs work with files and the possible conversion is thus actually not possible at all.
Multiplatform software - convert pcm to bmc on any platform
Advanced version of the popular Embroidermodder