This is classic computer emulation based on the Motorola MC6809 processor.
Together with other emulated I/O components the complete Eurocom II/V7 running FLEX OS can be used on a Linux or Windows PC. It comes with complete graphical user interface, 2-64 colors, a separate Setup program and some sample disks. In addition a explorer like tool can be used to explore DSK-Files. Flexemu was developed under Gnu general public license.
It allows MC6809 emulation running in a separate thread and you can run MC6809 with original or maximum possible frequency. It also provides configurable CPU instruction logging and 0% host CPU load when MC6809 is stopped and less than 5% load when running with original frequency.