Professional DOS, RapiDOS (Pro) and DiskDemon (DemonDOS (?)) are all the same thing distributed by different companies throughout the world. Apart from the stuff gathered in this category we can only point you the number one resource for this speeder:
The excellent information gathered there includes detailed reverse engineering descriptions, schematics, ROMs, Manuals and more. Of course Kernal_ROM_all_rr.c64.org_2011-06.rar contains a complete mirror of D81's Professional DOS area.
- Professional DOS @ D81.de again of course
- Professional DOS - Das System is a very well detailed german article by Tim Schürmann
- Professional DOS - Die Hardware is the followup article covering the hardware
Pages in category "Professional DOS"
This category contains only the following page.
Media in category "Professional DOS"
The following 10 files are in this category, out of 10 total.