This is a port of cisc-san's excellent xdisk2, an RS232 PC-88xx disk and ROM read/write tool, for unix systems (using file-type read and write operations).
All four modes are supported: b, r, w, s, both baud rates!
From the pc folder simply type make. Run the file to see usage().
Built and tested on a Pi400 + PC-8801mkII/FR.
(Branch "old" is simply a mirror of xdisk 2.0.7)