monroeread
Monroe OC8820 · OS8 · Databoard 4680
List, extract, and build Monroe OC8820 / OS8 disk images — also used for Databoard 4680 volumes.
Short format description (disk geometries and related notes): ABC Tools wiki.
monroeread / monroewrite handle Monroe OC8820 / OS8 disks (256-byte logical sectors, flat LBA). The same on-disk format is what you meet on Databoard 4680 media, so this tree is the CLI for both.
Write can build a fresh image from a directory tree, optionally with OS install, bootgen, and autostart. Formats include Monroe floppies, OS8 8″ DD, CP/M, and several Winchester dumps. Details: MONROE_FORMAT.md in the repository.
Memory test ROM for the machine: Monroe Diagnostic ROM.