Foreign File System I/O
fsio is a utility for manipulating foreign file systems within container files used by various emulators such as Simh.
Current supported file systems:
dos11 - DOS/BATCH-11 on RF11, RK05 or RP03 disks
rt11 - RT-11 including large drives with multiple partitions
dosmt - container file is DOS-11 magtape format
os8 - OS/8 on RX01, RX02 or RK05 disks
unixv7 - Research Unix V7