Copy the *.rbf into a root folder of the SD card.
Copy a version of a RiscOS ROM into the "Archie" folder, renaming it to riscos.rom.
CMOS is automatically saved to cmos.dat if any modification (configure utility or others) is detected. To revert settings to default remove cmos.dat and reload the core.
Core gets current clock setting from Linux subsystem.
The current version supports two floppy drives. Floppy disk images ADF format and of exactly 819200 bytes in size are currently required. This is the most common format for the Acorn Archimedes.
Up to 2 hard disks images with extension HDF can be mounted. System has to be additionnaly configured. 1) delete any existing cmos.dat file from Archie folder. 2) Reload the core. 3) Open command line (F12 or ctrl+F12) and type: configure idefsdiscs 1 (or 2 if you use two hard disks) 4) Mount required image(s) 5) Make a cold reset.
To save currently selected images, use OSD option "Save Settings"
If the ROM is recognized the core should boot into Risc OS. Press Win+F12 to open the OSD menu. You can move to other pages of settings by pressing the right arrow key.
This core uses the Amber CPU core from OpenCores which is LGPL. The core itself is dual licensed LGPL/BSD.